JP2021019955A - Puncture assisting tool - Google Patents

Abstract

To provide a puncture assisting tool capable of preventing erroneous puncture of the carotid artery by enabling a puncture needle to be stably inserted along a traveling line direction of the jugular vein.SOLUTION: Provided is a puncture assisting tool 8B for percutaneously puncturing a puncture needle 112 into a blood vessel of a living body, the puncture assisting tool being applicable regardless of the shape of an ultrasound probe and its axial direction when performing puncture under ultrasound guidance, and also applicable even when puncture is not performed under ultrasound guidance as in a landmark method. The puncture assisting tool comprises: a main body having a regulating part that regulates a traveling direction of the puncture needle for a blood vessel which has been confirmed that its blood stream runs in the living body in advance; and fixing means for fixing the main body to the skin of the living body.SELECTED DRAWING: Figure 17

Description

The present invention relates to a puncture aid used when a puncture needle is percutaneously punctured into a blood vessel or the like in a living body.

Conventionally, the act of puncturing a living body with a puncture needle for the purpose of collecting blood, administering a drug or a nutritional supplement, inserting a catheter, collecting a living tissue, or the like has been widely performed in the medical field. Such puncture with a puncture needle is often performed under non-perspective by imagining the structure of the puncture site based on the experience of a doctor, X-ray image, anatomy, and the like. Even with such a puncture, in many cases, the target site is punctured and appropriate medical treatment is performed. However, for example, in the case of a doctor who has little experience in puncturing, the structure of the puncture site is special and difficult. In the case of a subject or the like, serious complications may be caused by damaging a living tissue other than the intended purpose. Taking percutaneous puncture of the central vein (central vein puncture) as an example, the puncture of a blood vessel of a living body is described in detail as follows.

Central vein venipuncture is a basic medical procedure and is performed in various fields of medical treatment. For example, central vein venipuncture is performed when a catheter is inserted and placed in the central vein for systemic management by administering a high-calorie infusion solution, a vasoactive drug, or the like, and measuring the central venous pressure. The internal jugular vein, subclavian vein, femoral vein, and elbow vein are used as the puncture site for placing the catheter in the central vein. Of these, when performing puncture in the operating room / intensive care unit, the right internal jugular vein is the first choice because of its good access and few serious complications. In central vein puncture, a procedure called the landmark method, in which puncture is performed based on an anatomical index on the body surface, has been generally performed. In recent years, ultrasonic-guided puncture, which will be described later, has become common, but the landmark method is still a practiced puncture technique. The success rate of the landmark method is said to be about 90%, and it is considered that the procedure is performed safely with a relatively high probability. On the other hand, there are reports that the incidence of complications is 0 to 20%. In addition, when the puncture site is the internal jugular vein, the risk of erroneous puncture of the common carotid artery running parallel to it has been pointed out. Thus, while the landmark method has a high success rate, it is said to be a procedure that can cause serious complications.

From the viewpoint of avoiding such complications by the landmark method, after grasping the running of the central vein and the cross-sectional structure of the puncture site in advance by ultrasonic waves, (1) puncture is performed by the landmark method, or (2) super Techniques such as puncturing under ultrasonic guidance are performed. However, in the case of (1), although the running and cross-sectional structure of the blood vessel are known in advance, it is not always easy to perform percutaneous puncture into the central vein without any guide. In addition, since central vein puncture is a basic procedure for systemic management performed before performing major surgery, for example, it is often performed by an inexperienced doctor. Therefore, the doctor who performs the central vein puncture is subject to great psychological pressure such as failure is not allowed and the procedure must be completed accurately and promptly, and the hand may be slightly out of order. As a result, for example, puncture along the running line direction of the internal jugular vein may not be possible, and the parallel common carotid artery may be punctured by mistake. In the case of (2), it is possible to puncture while grasping the cross-sectional structure of the puncture site in real time, but the puncture doctor holds the ultrasonic probe with one hand and the puncture needle with the other hand. It is necessary to insert the puncture needle from a predetermined puncture position while checking the ultrasonic tomographic image by ultrasonic waves on the monitor. In this way, with both hands closed, the puncture route must be determined while looking at both the monitor and the puncture position, and puncture must be performed based on the puncture route, so that appropriate puncture may not be possible. Further, when the same psychological pressure as in the case of (1) above is applied, proper puncture may become more difficult. As a result, as in the case of (1), the common carotid artery may be punctured by mistake.

When puncturing under the ultrasonic guide of (2) above, it can be attached to and detached from the ultrasonic probe for the purpose of eliminating such a situation and assisting puncture along the determined puncture route. A puncture guide used by fixing has been proposed (Patent Document 1).

Japanese Patent No. 5514119

For example, Patent Document 1 describes a bracket including an annular member for accommodating the tip of an ultrasonic transducer (ultrasonic probe) and a puncture device that is easily attached to the bracket and allows the patient's body to penetrate to a desired depth. A guide system is described that includes a puncture device guide (a puncture guide) that is accepted and configured to construct a path with a predetermined angle. As described above, in the invention described in Patent Document 1, a bracket for fixing the puncture device guide to the ultrasonic probe is required. However, the shape of the ultrasonic probe differs depending on the model, and it is necessary to prepare a bracket having a shape suitable for the model. Further, the puncture guide that can be attached to such a bracket is complicated to attach the bracket to the ultrasonic probe, and the selection of the puncture guide and its attachment are also complicated, and the selection of the axial direction to which the ultrasonic probe is applied is complicated. It is not in line with the actual situation in the medical field, such as restrictions on the number of patients.

Therefore, an object of the present invention is that when puncturing under ultrasonic guidance, it can be applied regardless of the shape of the ultrasonic probe and its axial direction, and puncture under ultrasonic guidance as in the landmark method. It can be applied even when the procedure is not performed. For example, by enabling the puncture needle to be stably inserted along the traveling line direction of the jugular vein, it is possible to prevent erroneous puncture of the carotid artery. To provide possible puncture aids.

The present inventor has conducted diligent studies in order to solve the above-mentioned problems. As a result, it was found that it is effective to adopt a configuration that enables fixation of the living body to the skin, instead of attaching the puncture guide to the ultrasonic probe as in the prior art. Then, for example, by adopting a configuration that regulates the course of the puncture needle along the traveling line direction of the blood vessel to be punctured such as the internal jugular vein, it is possible to suppress erroneous puncture of other organs such as the carotid artery. I found that. From these findings, the present invention has been completed.

Aspect of the present invention is a puncture assisting tool for percutaneously puncturing a blood vessel of a living body, and regulates the traveling direction of the puncture needle with respect to a blood vessel whose running in the living body has been confirmed in advance. The present invention relates to a puncture assisting tool including a main body having a portion and a fixing means for fixing the main body to the skin of a living body.

In the aspect of the present invention, the restricting unit may have a straight-ahead direction restricting unit that regulates the straight-ahead direction of the puncture needle with respect to the traveling line direction of the blood vessel assumed on the skin surface.

Here, the "straight direction with respect to the traveling line direction of the puncture needle" means the traveling line direction of the blood vessel and the traveling direction of the puncture needle in a plan view on a plane parallel to the skin surface.

In the aspect of the present invention, the straight-ahead direction regulating portion is provided so as to be in contact with the side surface of the puncture needle and lockable from both sides in a direction orthogonal to the traveling direction of the puncture needle, at least in a portion separated in the traveling line direction. It may have a locking portion.

In the embodiment of the present invention, the locking portion is selected from a wall surface that is continuous along the traveling line direction, a wall surface that is discontinuous along the traveling line direction, and a columnar body that can make point contact with the puncture needle. It may have a seed locking portion.

In the aspect of the present invention, the locking portion may have wall surfaces that continuously face each other along the traveling line direction.

In the aspect of the present invention, the locking portion may have a portion in which the distance between the facing wall surfaces becomes narrower as it approaches the skin side in a direction orthogonal to the traveling direction of the puncture needle.

In the aspect of the present invention, the regulating portion may have a traveling angle regulating portion that regulates the traveling angle of the puncture needle with respect to the skin.

Here, the "advancing angle of the puncture needle with respect to the skin" means the angle formed by the puncture needle with respect to the skin surface when the puncture needle is punctured into the skin.

In the embodiment of the present invention, when the restricting portion has the locking portion, the advancing angle restricting portion is provided between the locking portions on the traveling line, and the advancing angle of the puncture needle with respect to the skin is determined in advance. It may be provided so that it can be locked by contacting the puncture needle from the skin side so as to be adjustable to a set angle.

In the aspect of the present invention, the advancing angle regulating portion has an inclined portion that continuously inclines so that the height from the skin surface decreases as the puncture position on the skin approaches along the traveling line direction. You may.

In the aspect of the present invention, the inclined portion may have at least one shape selected from a straight line, a convex folding line, and a convex curve as a shape on the traveling line.

In the embodiment of the present invention, the fixing means has a joint portion that is detachably joined to the skin, a connecting portion that is connected to the main body, and the joint portion that is fixed to one surface and the opposite surface. It may have a sheet-like base material portion to which the connecting portion is fixed.

In the aspect of the present invention, the main body may have a support portion for supporting the regulation portion on a side close to the skin.

In the embodiment of the present invention, when the main body has the support portion, the fixing means may be fixed to at least a part of the support portion of the main body.

In the embodiment of the present invention, when the main body has the support portion, the support portion has a plate-shaped portion extending toward the puncture position, and the plate-shaped portion has a through hole through which a puncture needle can puncture the skin. Alternatively, a notch may be provided.

In the embodiment of the present invention, the main body or the fixing means is connected to an auxiliary sheet on which a mark indicating a puncture position of a blood vessel in a living body, a puncture position on the skin, or an installation position of an ultrasonic probe assisting the puncture is displayed. May be.

In the embodiment of the present invention, recesses and / or protrusions may be formed on the outer surface of the main body except for the skin side along the traveling line.

In the embodiment of the present invention, when the inclined portion is provided, the shape of the inclined portion on the traveling line may be formed on the outer side between the traveling angle restricting portions.

The puncture assisting tool according to the present invention can be applied regardless of the shape of the ultrasonic probe and its axial direction when puncturing is performed under ultrasonic guidance, and is under ultrasonic guidance as in the landmark method. It can be applied even when puncture is not performed. Therefore, the surgeon can stably puncture the puncture needle along the traveling line direction of the jugular vein, for example. As a result, for example, it is possible to prevent erroneous puncture of the carotid artery running parallel to the jugular vein.

(A) is a perspective view schematically showing the main body 1a of the puncture assisting tool according to the first embodiment. (B) is a perspective view schematically showing the main body 1b of the puncture assisting tool according to the second embodiment. (C) is a perspective view schematically showing the main body 1c of the puncture assisting tool according to the third embodiment. (A) is a perspective cross-sectional view for explaining the structure of the main body 2a of the puncture assisting tool according to the fourth embodiment. (B) is a perspective cross-sectional view for explaining the structure of the main body 2b of the puncture assisting tool according to the fifth embodiment. (A) is a perspective cross-sectional view for explaining the structure of the main body 3a of the puncture assisting tool according to the sixth embodiment. (B) is a perspective cross-sectional view for explaining the structure of the main body 3b of the puncture assisting tool according to the seventh embodiment. (A) is a perspective cross-sectional view for explaining the structure of the main body 4a of the puncture assisting tool according to the eighth embodiment. (B) is a perspective cross-sectional view for explaining the structure of the main body 4b of the puncture assisting tool according to the ninth embodiment. (C) is a perspective cross-sectional view for explaining the structure of the main body 4c of the puncture assisting tool according to the tenth embodiment. (A) is a perspective view for explaining the structure of the main body 5a of the puncture aid according to the eleventh embodiment. (B) is a cross-sectional view on one side of the perspective line I-I in FIG. 5 (a). (A) It is a perspective view for demonstrating the structure of the main body 5b of the puncture aid which concerns on Example 12. FIG. FIG. 6B is a one-sided cross-sectional view taken along the line II-II in FIG. 6A. (A) is a perspective view for explaining the structure of the main body 6a of the puncture aid according to the thirteenth embodiment. (B) is a cross-sectional view on one side of a perspective view taken along line III-III in FIG. 7 (A). (A) is a perspective view for explaining the structure of the main body 6b of the puncture aid according to Example 14. (B) is a cross-sectional view taken along the IV-IV line perspective in FIG. 8 (a). (A) is a perspective view for explaining the structure of the main body 7a of the puncture aid according to Example 15. (B) is a sectional view taken along line VV on one side in FIG. 9 (a). (A) is a perspective view for explaining the structure of the main body 7b of the puncture aid according to Example 16. (B) is a cross-sectional view on one side of the VI-VI line perspective in FIG. 10 (A). (A) is a perspective view for demonstrating the structure of the main body 8a of the puncture aid according to Example 17. (B) is a sectional view taken along line VII-VII on one side in FIG. 11 (a). (A) is a perspective view for explaining the structure of the main body 8b of the puncture aid according to Example 18. (B) is a sectional view taken along line VIII-VIII on one side in FIG. 12 (a). (A) is a perspective view for explaining the structure of the puncture assisting tool 9A which concerns on Example 19. (B) is a perspective view for explaining the structure of the puncture assisting tool 9B according to the twentieth embodiment. (A) is a perspective view for explaining the structure of the puncture assisting tool 10A which concerns on Example 21. (B) is a perspective view for explaining the structure of the puncture aid 10B according to the twenty-second embodiment. It is explanatory drawing which schematically showed the running of the main vein which is the object of puncture when performing central vein puncture around the human neck. In (a), a mark indicating a traveling line assumed on the skin surface along the traveling of the internal jugular vein and a mark indicating a planned puncture position of a blood vessel in the living body are provided on the skin surface around the human neck. It is explanatory drawing which showed typically the state at the time of attachment. (B) is an explanatory view schematically showing a state when the puncture aid is fixed to the skin surface in accordance with the mark shown in FIG. 16 (a). It is explanatory drawing which shows typically the state when the puncture needle is punctured toward the internal jugular vein by using the puncture aid under ultrasonic guidance.

The puncture aid according to the embodiment of the present invention is for percutaneously puncturing a blood vessel of a living body with a puncture needle. The puncture aid includes a main body having a regulating portion that regulates the traveling direction of the puncture needle with respect to a blood vessel whose running in the living body has been confirmed in advance, and a fixing means for fixing the main body to the skin of the living body. To be equipped. The regulation unit has a straight-ahead direction regulation unit that regulates the straight-ahead direction of the puncture needle with respect to the travel line direction of the blood vessel assumed on the skin surface.

As described above, since the puncture aid is provided with a fixing means for fixing the predetermined main body to the skin of the living body, the puncture aid is directly fixed to the skin regardless of the presence or absence of the ultrasonic probe and the shape of the ultrasonic probe. , Can be used when puncturing a puncture needle. Further, since the regulating unit has a straight-ahead direction regulating unit capable of accepting the puncture needle and regulating its traveling direction in a predetermined direction, the operator stabilizes the puncture needle along the traveling line direction of the blood vessel. It is possible to puncture a blood vessel.

The straight-ahead direction regulating unit is not particularly limited as long as it has a structure capable of regulating the straight-ahead direction of the puncture needle with respect to the travel line direction of the blood vessel assumed on the skin surface. As a structure having such a structure, for example, at least in a portion separated in the traveling line direction, the puncture needle is provided so as to be in contact with the side surface of the puncture needle and lockable from both sides in a direction orthogonal to the traveling direction of the puncture needle. Those having a locking portion can be mentioned. For example, at two points separated from each other in the traveling line direction, the side surface of the puncture needle is in contact with the side surface of the puncture needle from one of the directions orthogonal to the traveling direction of the puncture needle at one point, and puncture is performed at the other point. Contact the side surface of the puncture needle from the other side of the direction orthogonal to the traveling direction of the needle, that is, contact one point each so as to face each other at two points separated from each other in the traveling line direction. Therefore, the straight-ahead direction of the puncture needle with respect to the traveling line direction can be regulated, and the traveling direction thereof can be regulated. Further, from the viewpoint of restricting the straight-ahead direction of the puncture needle, the contact between the puncture needle and the straight-ahead direction restricting portion can occur at at least two separated points that are opposed to each other. It is good, but from the viewpoint of ensuring better operability of the operator, two locking portions that are opposed to each other at at least one of the two separated points are provided, and the other point is provided. In the above, it is preferable to provide one locking portion having an opposite relationship as described above, and to provide a total of three locking portions. Further, in this case, the two locking portions provided on the same side in the direction orthogonal to the traveling direction of the puncture needle at the two separated points may have a continuous structure along the traveling line direction. From the viewpoint of ensuring better operability of the operator, it is more preferable to provide two locking portions facing each other at at least two separated points, and to provide a total of four locking portions. Further, in this case as well, the two locking portions provided on the same side in the direction orthogonal to the traveling direction of the puncture needle at the two separated points may have a continuous structure along the traveling line direction.

The structure of such a locking portion is selected from, for example, a wall surface that is continuous along the traveling line direction, a wall surface that is discontinuous along the traveling line direction, and a columnar body that can make point contact with the puncture needle. An example has one type of locking portion. These can be combined as appropriate. For example, a structure in which only the columnar body or only the discontinuous wall surface or a combination of the columnar body and the discontinuous wall surface is provided so as to abut the puncture needle as described above, only the columnar body or the discontinuous wall surface. Examples thereof include a structure in which only the wall surface is provided in combination with the continuous wall surface, and a structure in which the continuous wall surface is provided so as to face each other along the traveling line direction. The position and number of the columnar body and the discontinuous wall surface can be determined in consideration of contact with the puncture needle as described above. Of these, from the viewpoint of better operability of the operator and from the viewpoint of satisfactorily restricting the straight-ahead direction of the puncture needle with respect to the traveling line direction, the traveling direction of the puncture needle in the vicinity of both ends of the main body along the traveling line direction. It is preferable that locking portions are provided so that they can come into contact with the puncture needle from both sides in the direction orthogonal to the puncture needle. As the structure of such a locking portion, only the columnar body or only the discontinuous wall surface or the discontinuous wall surface is provided on both sides in the direction orthogonal to the traveling direction of the puncture needle in the vicinity of both ends of the main body along the traveling line direction. A structure in which a columnar body and the discontinuous wall surface are combined and provided at a total of four locations, and a structure in which continuous wall surfaces are provided facing each other along the traveling line direction are preferable, and the wall surface continuous along the traveling line direction is preferable. A structure provided so as to face each other is more preferable. Examples of the structure in which continuous wall surfaces are provided facing each other along the traveling line direction include a cylindrical shape that opens at both ends in the traveling line direction, a structure having planes that face each other along the traveling line direction, and the like. Examples of the cylindrical shape include a cylinder having a constant inner diameter, a funnel shape in which the inner diameter gradually decreases from one end to the other, and the like. Examples of the structure having planes facing each other along the traveling line direction include a square cylinder shape having openings at both ends in the traveling line direction, a structure having facing plate-shaped portions, and the like. The square tube shape has, for example, a shape having the same cross section over the entire length in the running line direction, parallel to the running line direction and orthogonal to the skin surface, having opposite planes, and a cross-sectional area toward the puncturing side. An example has a structure in which is gradually reduced. Further, in the case of a tubular shape, an opening that can be opened and closed over the entire length in the traveling line direction may be formed.

The locking portion is provided so as to be in contact with the side surface of the puncture needle from both sides in the direction orthogonal to the traveling direction of the puncture needle and to be locked at least in a portion separated in the traveling line direction. Then, the traveling angle of the puncture needle with respect to the traveling line direction is regulated so as to follow the traveling line of the blood vessel assumed on the skin surface. From the viewpoint of restricting the traveling angle of the puncture needle, the position of the locking portion is assumed to be a straight line along the traveling line on the main body, and if this straight line is used as a reference line, the locking portion abuts on the side surface of the puncture needle. The shortest distance from the reference line of the part should be at least half the outer diameter of the puncture needle, and less than the total length of half the outer diameter of the puncture needle and the gap where the puncture needle can move. Is preferable. When the locking portion has two structures facing each other in a direction orthogonal to the traveling direction of the puncture needle, the shortest distance between the two opposing structures is larger than the outer diameter of the puncture needle, and this outer diameter and the puncture needle move. It is preferably less than or equal to the total length with the possible gap. Further, as long as the locking portion is installed in such a positional relationship in consideration of the relationship with the puncture needle, the side of the two locking portions that is close to the skin side along the traveling line direction. The structure of the bottom of the surface is not particularly limited, and may be, for example, a flat surface, a curved surface, a multifaceted surface, or the like.

On the other hand, the outer diameter of the puncture needle used for puncturing a blood vessel has a plurality of sizes, and there is a difference between the maximum and the minimum. Therefore, when the position of the locking portion is set according to the maximum outer diameter of the applied puncture needle and the puncture needle having the minimum outer diameter is applied, the gap between the puncture needle and the locking portion becomes large, and the puncture occurs. Regulations may be weaker than when the needle travel angle is the maximum outer diameter. Therefore, from the viewpoint of application regardless of the outer diameter of the puncture needle, the contact portion of the locking portion facing the locking portion as it approaches the skin side in the direction orthogonal to the traveling direction of the puncturing needle. It is preferable to have a portion where the distance between them is narrowed. It should be noted that such a structure is also good from the viewpoint of making it easy to align the center line in the length direction of the puncture needle with the traveling line. Such a configuration is more effective when the structure of the locking portion is a structure in which continuous wall surfaces are provided facing each other along the traveling line direction. Examples of such a structure include, but are not limited to, a structure having a V-shaped structure in a cross section in a direction orthogonal to the traveling direction of the puncture needle. Such a V-shaped structure in a predetermined cross section may be a V-shaped structure in the entire cross section, or is adopted in the bottom portion near the skin side of the cross section orthogonal to the traveling direction of the puncture needle and the vicinity thereof, and the skin. The cross section of the portion far from the side may be composed of two parallel lines continuous from the V shape. The opening angle of the V-shape of the V-shaped structure is not particularly limited, but is preferably 10 ° to 90 ° from the viewpoint of advancing the puncture needle along the traveling line without deviation. Further, when a structure in which continuous wall surfaces are provided facing each other along the traveling line direction is formed in the locking portion of the straight-ahead direction regulating portion, it can also function as a traveling angle regulating portion described later.

Further, the structure of the locking portion according to the outer diameter of the puncture needle may be formed in advance as described above, or may be provided detachably. When it is detachably provided, it is not limited to the one having a portion where the distance between the contact portions of the opposing locking portions is narrowed, and even the one having a parallel contact portion according to the outer diameter of the puncture needle. Good.

The puncture needle assisting tool according to the embodiment preferably has a advancing angle regulating portion that regulates the advancing angle of the puncturing needle with respect to the skin. As a result, in addition to the traveling line direction, the traveling angle of the puncture needle with respect to the skin is also regulated, so that the blood vessel existing at the depth from the skin confirmed in advance can be punctured more reliably. Therefore, the possibility of erroneous puncture into other organs can be further reduced. Such a traveling angle regulating unit has a configuration in which the traveling angle of the entire regulating unit or the straight-ahead direction regulating unit with respect to the skin can be arbitrarily or stepwise changed by a mechanical structure using an elastic body such as a spring. Examples thereof include a configuration in which a structure such as a locking portion that can be locked by contacting the puncture needle from the side is provided. From the viewpoint of the operator's operability, the degree of freedom of angle adjustment, the simplicity of the three-dimensional structure, and the sterilization, a structure such as a locking portion that can be locked by contacting the puncture needle from the skin side is provided. The configuration is preferred.

When the traveling angle regulating portion is provided, the traveling angle regulating portion is provided between the locking portions on the traveling line from the viewpoint of simultaneously efficiently and easily regulating the traveling line direction and the traveling direction of the puncture needle with respect to the skin. Therefore, it is preferable that the traveling angle of the puncture needle with respect to the skin can be adjusted to a preset angle so that the puncture needle can be locked by contacting the puncture needle from the skin side. Examples of such a traveling angle regulating portion include a portion that can function as a fulcrum at at least one point on the side surface of the puncture needle, a portion that contacts the puncture needle over a predetermined length in the length direction, and the like. Structures that can function as the fulcrum include, for example, one columnar body having a predetermined height from the skin surface, two or more columnar bodies whose height from the skin surface decreases as the height approaches the puncture position, and the skin surface. A stepped structure in which the height from the skin gradually decreases as it approaches the puncture position on the skin, and an inclined structure in which the height from the skin surface decreases continuously as it approaches the puncture position on the skin. Be done. Of these, from the viewpoint of the degree of freedom of the operator's angle adjustment according to the situation, those having an inclined portion having an inclined structure tend to be preferable. The inclined structure is not particularly limited, and examples thereof include those having at least one shape selected from a straight line, a convex polygonal line, and a convex curve as the shape on the traveling line. In the case of a straight line, the angle with respect to the skin has a constant angle. This angle can be determined according to the depth of the blood vessel from the skin and the puncture method. For example, when puncturing a human jugular vein by the landmark method, it is generally set to 30 ° to 45 °. When puncturing a human jugular vein under ultrasonic guidance, the temperature is generally set to 60 °, but it may be larger than this. In the case of a convex fold line, the angle of advance with respect to the skin gradually increases as the puncture position on the skin approaches. As such a configuration, for example, a specific angle of 50 ° to 70 °, a specific angle of 40 ° to 60 °, a specific angle of 20 ° to 50 °, and the like are set in order from the side closest to the puncture position. Etc., but are not limited to these. Further, a portion opposite to the puncture position and having a portion of 0 ° as a portion parallel to the skin surface may be provided continuously on the inclined portion. More specifically, for example, 60 °, 45 °, 0 °, 60 °, 45 °, 60 °, 45 °, 0 °, etc., in order from the side closest to the puncture position. However, it is not limited to these. In the case of a convex curve, for example, an arc, an elliptical arc, or the like can be mentioned. The lengths of the arc and the elliptical arc can be appropriately selected, and examples thereof include, but are not limited to, a 1/4 arc and a 1/4 elliptical arc partitioned by a major axis and a minor axis portion. When combining a curved line and a straight line, it is preferable to make them continuous at both ends of the arc so that a recess is not formed. Further, as the shape of the inclined portion including the shape on the traveling line, an inclined surface or the like can be mentioned.

If necessary, the main body portion may have a support portion that supports the regulation portion on a side close to the skin. As a result, when the main body is fixed to the skin, the main body is more stably fixed to the skin, so that more stable puncture can be performed without shifting the direction of the regulating portion.

The shape and structure of the support portion are not particularly limited, and can be appropriately determined according to the shape and structure of the regulating portion and the fixing means described later. For example, the straight-ahead direction regulating portion of the regulating portion is a member having a plate-like structure having a wall surface continuous along the traveling line direction, or a rod-shaped member having a discontinuous wall surface along the traveling line direction as described above. When a member having a plate-like structure or a columnar body capable of point contact with a puncture needle is provided, a structure having a plate-like structure capable of placing these and supporting them from the skin side may be adopted. it can. Further, also in the case of a member having two plate-like structures having wall surfaces continuously facing each other along the traveling line direction, these members can be placed and supported from the skin side. A structure having a structure can be adopted. Further, a structure in which the straight-ahead direction regulating portion of the regulating portion extends from a portion of a plate-like structure close to the skin side that forms a wall surface that continuously faces the traveling line direction and connects the two to form a bottom portion. In the case of a member having a plate-like structure on which this member can be placed and supported from the skin side, or a portion having a plate-like structure forming a wall surface, the bottom portion thereof. A plate-like structure that is connected in the vicinity and extends along the skin surface can be adopted. Further, even when the regulating portion has the various straight-ahead direction regulating portions and the advancing angle regulating portion described above, a plate-like structure capable of mounting the entire portion including the regulating portion and supporting it from the skin side is provided. It is possible to adopt a structure having a structure, or a structure having a plate-like structure that is connected in the vicinity of the bottom portion close to the skin and extends along the skin surface among the portions including the regulation portion. Further, the structure having such a plate-like structure is provided along the skin surface from the outer peripheral portion of the portion close to the skin side of the portion including the regulation portion from the viewpoint of better supporting the portion including the regulation portion. It is desirable that a plate-shaped portion is formed so as to extend. The position where such a plate-shaped portion is provided is not particularly limited, and may be provided on the entire circumference along the outer circumference of the portion including the regulation portion, or may be provided on a part of the outer circumference thereof. The shape, size, etc. of the plate-like structure can be determined according to the structure of the skin surface to be applied, the structure of the fixing means, the arrangement, and the like. Further, these members may be formed separately and combined, or may be integrally formed. When the fixing means and the supporting portion are integrally formed, it tends to be advantageous to form the supporting portion or a part of the supporting portion separately so as to be detachable together with the fixing means. When adopting a simple structure from the viewpoint of molding cost, detergency, and sterility, it tends to be advantageous to integrally form the main body. Further, when the fixing means is provided on the support portion, from the viewpoint of ensuring the bonding force with the skin and ensuring the workability of puncture, the support is larger in the direction orthogonal to the traveling line direction than in other directions. It may be advantageous to provide a section.

As the structure of the support portion, for example, the above-mentioned structure can be adopted, but from the viewpoint of facilitating the identification of the puncture position on the skin, the support portion has a plate-shaped portion extending toward the puncture position on the skin and the plate. It is preferable that the shape portion is provided with a through hole or a notch portion through which the puncture needle can puncture the skin. A plurality of through holes may be provided so as to correspond to the positions corresponding to the advancing angles from the viewpoint of facilitating the selection of the advancing angle of the puncture needle with respect to the skin according to the depth of the blood vessels from the skin surface. Further, in the case of the cutout portion, an angle display or the like may be provided at a position corresponding to the traveling angle from the same viewpoint. However, it is not always necessary to provide the travel angle when the travel angle is specified by the travel angle regulation unit of the regulation unit.

From the viewpoint of ensuring visibility in the traveling line direction, the outer surface of the main body excluding the skin side preferably has recesses and / or convex portions formed on the outer surface along the traveling line. Further, from the viewpoint of improving visibility, it is more preferable that these concave portions and convex portions are given a color different from that of other portions.

Further, it is preferable that the shape of the inclined portion of the advancing angle regulating portion on the traveling line is also formed on the outer side between the locking portions. Thereby, the structure of the inclined portion can be easily confirmed visually or by the tactile sense of the hand without directly confirming the structure of the inclined portion. The shape of the inclined portion on the traveling line reproduces all or part of the shape of the surface of the inclined portion facing the puncture needle on the traveling line from the viewpoint of confirming the structure of the inclined portion that can come into contact with the puncture needle. It is preferably provided on the outer surface of the main body on the outside between the locking portions so as to have a positional relationship corresponding to the inclined portion.

The fixing means may be any as long as the main body can be directly fixed to the skin. For example, (i) having an adhesive layer that can be detachably adhered to the skin and the main body, (ii) a physical fastener such as an adhesive layer that can be detachably adhered to the skin and a surface fastener that can be detachably fixed to the main body. Those with a fixing part, (iii) a sucker that can be attached to and detached from the skin and an adhesive layer or a physical fixing part that fixes the sucker to the main body, (iv) can be detachably adhered to the skin Those having an adhesive layer and having an adhesive layer that is non-detachably connected to the main body, (v) a through hole or the like is provided in the main body, and a needle is pierced through the through hole or the like is sewn to the skin through a thread to sew the main body. Those that are fixed to the skin, (vi) The magnets are fixed to the skin and the main body and can be attached and detached by magnetic force. The main body is fixed to the skin (vii) and can be wrapped around the living body such as the neck. Examples include those that fix the main body to the skin with an adhesive belt. From the viewpoint of cleaning, sterilizing, and reusing the main body, it is preferable that such an adhesive layer, a physical fixing portion, and the like are removable to the skin and the main body. Examples of (i) include (i-1) a single-sided tape having an adhesive layer on one surface of the sheet-like base material, and (i-2) one surface of the sheet-like base material as the main body. Examples thereof include those provided with a double-sided tape capable of bonding the other surface to the skin, (i-3) a combination of the single-sided tape and the double-sided tape, and the like. As (i-1), a single-sided tape provided with a general adhesive layer such as a sadical tape, a moisture-absorbing gel layer having adhesiveness is provided at a joint portion to be bonded to the skin, and a sadical tape or the like is provided at a portion connected to the main body. Examples thereof include a single-sided tape provided with a general adhesive layer. As (i-2), a joint portion that is detachably joined to the skin, a connecting portion that connects to the main body, and the joint portion are fixed to one surface, and the connecting portion is located on the opposite surface. An example having a fixed sheet-like base material portion. Examples of the joint include a general adhesive layer similar to that of a sadical tape, the hygroscopic gel layer, and the like. Examples of the connecting portion include a general adhesive layer similar to a sadical tape or the like. As the base material portion, those used for general single-sided tape or double-sided tape can be used. The adhesive layer constituting the joint portion is preferably formed on the entire base material portion from the viewpoint of securing the joint area with the skin. The adhesive layer constituting the connecting portion is preferably formed only on the portion to be joined to the main body (corresponding to (i-3)), but the portion to be joined to the main body is covered with a protective film. You may. As for (ii), the adhesive layer that can be detachably adhered to the skin can adopt the same structure as that of (i). Examples of the physically fixing portion that can be detachably fixed to the main body include a hook-and-loop fastener. The adhesive layer and the physical fixing portion are formed on, for example, a sheet-shaped base material portion. The hook-and-loop fastener has a hook surface and a loop surface, and it is preferable that one of them is fixed to the main body and the other to the base material portion by an adhesive or the like. Examples of (iii) include a suction cup used when connecting an electrocardiogram electrode to the skin, and a suction cup provided with an adhesive layer or a physical fixing portion for fixing such a suction cup to the main body. Examples of the physically fixed portion include a clip and the like. Examples of (iv) include those in (i-2) above, in which the connecting portion with the main body is used as an adhesive layer such as an adhesive to be detachably connected to the main body. Examples of (v) include those in which a plurality of through holes are provided on the peripheral edge of the main body close to the skin, sutures are passed through the through holes, and the main body is sutured and fixed to the skin by the sutures. .. As (vi), for example, a magnet is fixed to a part of the main body close to the skin with tape, an adhesive or a physical mechanism, and the magnet is detachably fixed to the skin with tape or the like corresponding to this. And so on.

Of these fixing means, (i) and (iv) are preferable from the viewpoint of convenience and certainty of fixing the main body to the skin. Further, among (i), (i-2) is more preferable.

The fixing means is preferably fixed to at least a part of the support portion of the main body from the viewpoint of the certainty of fixing the main body to the skin. Further, from the viewpoint of ensuring the joint strength between the fixing means and the main body, a connecting portion between the fixing means and the main body may be formed in a portion other than the support portion.

The main body or the fixing means may be connected to an auxiliary sheet on which a reference line indicating a puncture position of a blood vessel in a living body, a puncture position on the skin, or an installation position of an ultrasonic probe assisting the puncture is displayed. This makes it possible to more accurately insert the puncture needle into the blood vessel in the living body confirmed in advance.

The material of the main body may be any of synthetic resin, metal, ceramics and the like, but synthetic resin is preferable. Further, the dimensions of the main body and each part constituting the fixing means can be appropriately determined in consideration of the dimensions of the puncture needle, the target on which the puncture aid is installed, the installation position, and the like. The main body may have a solid structure or may have a space formed inside, as long as it has an external shape having the above-mentioned structure.

Hereinafter, examples of the puncture aid will be described with reference to the drawings.

(Example 1)
FIG. 1A is a perspective view schematically showing the main body 1a of the puncture assisting tool according to the first embodiment. The puncture assisting tool according to the first embodiment includes a main body 1a having a regulating portion 10 and a supporting portion 17, and a fixing means. It has three columnar bodies 11, 12, and 13 as the straight-ahead direction regulating portion 10a of the regulating portion 10. The columnar bodies 11, 12, and 13 have side surface portions 14, 15, and 16 that can make point contact with the puncture needle as locking portions. The columnar bodies 11, 12, and 13 are columnar in FIG. 1A, but are not limited thereto. The height of the support portion 17 from the surface 17a is the same, but the height on the side close to the puncture position may be lowered. The columnar bodies 11, 12, and 13 are placed on the flat plate-shaped support portion 17. The columnar bodies 11, 12, and 13 may be integrally formed with the support portion 17, or may be formed and integrated separately. The support portion 17 is provided on the side of the columnar bodies 11, 12, and 13 close to the skin. The support portion 17 has a front surface 17a and a back surface 17b that is on the skin side opposite to the surface 17a. The surface 17a constitutes the outer surface of the main body 1a. The surface 17a is formed with a recess 18 formed along the running line of the blood vessel in order to facilitate visual confirmation of the running line of the blood vessel from the outer surface. The recess 18 is a linear concave shape that is continuously formed from the side surface 19 on one end side of the traveling line of the support portion 17 to the side surface 20 on the other end side. The columnar bodies 11, 12, and 13 serving as the straight-ahead direction restricting portion 10a are provided near both ends in the traveling line direction along the recesses 18 indicating the traveling line direction. Of these, the columnar body 11 is provided at a position close to the recess 18 in the vicinity of one end thereof. The columnar body 12 and the columnar body 13 are provided so as to face each other with the recess 18 interposed therebetween in the vicinity of the other end portion thereof. The columnar body 11 and the columnar bodies 12 and 13 are provided apart from each other at a predetermined interval. The columnar body 11 is provided on the same side as the columnar body 12 with respect to the recess 18 indicating the traveling line, and the columnar body 11 and the columnar body 12 are linear from the viewpoint of satisfactorily regulating the traveling angle of the puncture needle. It is provided so that the shortest distance from the concave recess 18 which is concave is the same. The columnar body 12 and the columnar body 13 may be provided at intervals that allow the puncture needle to pass, for example. In the example shown in FIG. 1A, the columnar body 12 and the columnar body 13 are provided in parallel, and the distance between them is equal, but the distance is set according to the size of the outer diameter of the puncture needle. , May be provided so that the distance becomes narrower toward the support portion 17. Alternatively, the columnar body 12 and the columnar body 13 may have a conical shape or a truncated cone shape. The recess 18 has a V-shaped cross section extending linearly. The recess 18 allows the operator to visually recognize the direction of the traveling line. Since the recess 18 has a V-shaped cross section, when the side surface of the puncture needle is in contact with the V-shaped portion at the end of the side surface 19 or the side surface 20 of the recess 18 to advance, it is in the longitudinal direction of the traveling line and the puncture needle. The puncture needle can be advanced by aligning with the central axis. Fixing means is provided on the back surface 17b of the support portion 17. As the fixing means, for example, those shown in the above-mentioned (i) to (vii) can be adopted depending on the situation. Of these, for example, the double-sided tape described above can be adopted. The double-sided tape may be provided on the entire back surface 17b or a part of the back surface 17b, or may be provided on the entire or a part of the back surface 17b, and for example, the same as shown in FIG. 13 (a) described later. In addition, a portion extending from the back surface 17b so as to extend to the outside of the support portion 17 may be included. Further, for example, as shown in FIG. 13 (b) described later, a portion including a portion extending from the surface 17a to the outside of the support portion 17 (for example, as described above, a sadical tape or moisture absorption). It may be a single-sided tape such as a tape having a gel layer as an adhesive layer). Further, the fixing means may be provided with notches (reference numerals 100, 102, 103) as shown in FIGS. 14 (a) or 14 (b) described later.

In the first embodiment, the puncture needle is positioned between the columnar body 12 and the columnar body 13 along the linearly extending recess 18 indicating the traveling line. Then, for example, by pressing the puncture needle against the side surface 14 constituting the locking portion of the columnar body 11 from the concave portion 18 side, the contact portion of the side surface 14 becomes a fulcrum, and the columnar body 13 is engaged. The side surface 16 constituting the stop portion can be brought into contact with the puncture needle. In this way, the columnar body 11 and the columnar body 13 that are separated from each other in the traveling line direction are side surfaces of the puncture needle from both sides of the columnar body 11 and the columnar body 13 side in the direction orthogonal to the traveling direction of the puncture needle. Contact with. Thereby, the traveling angle of the puncture needle with respect to the traveling line direction can be regulated.

As a modification of the first embodiment, for example, the surface 17a of the support portion 17 or the surface 17a of the support portion 17 from one side to the other along the puncture assisting tool 18 having the same structure as that of the first embodiment except that the columnar body 12 is not provided. Examples thereof include a puncture assisting tool provided with a structure in which the height from the back surface 17b gradually decreases or gradually decreases as a traveling angle regulating portion.

(Example 2)
FIG. 1B is a perspective view schematically showing the main body 1b of the puncture assisting tool according to the second embodiment. The puncture aid includes a main body 1b having a regulating portion 10 and a supporting portion 17, and a fixing means. The puncture assisting tool according to the second embodiment is the puncturing assisting tool according to the first embodiment in which the columnar body 21 is provided so as to face the columnar body 11 with the concave portion 18 sandwiched in the vicinity of one end of the concave portion 18. Is. Since the columns are the same as those in the first embodiment except for the columnar body 21, the same configurations are designated by the same reference numerals, and only different configurations will be described. The second embodiment has four columnar bodies 11, 12, 13, and 21 as the straight-ahead direction regulation unit 10a of the regulation unit 10. The columnar body 21 has a side surface portion 22 capable of making point contact with a puncture needle serving as a locking portion. The columnar body 21 is columnar in FIG. 1 (b), but is not limited to this. The height of the columnar body 21 from the surface 17a of the support portion 17 is the same, but the height on the side close to the puncture position may be lowered. The columnar body 21 is placed on the flat plate-shaped support portion 17. The columnar body 21 is provided on the same side as the columnar body 13 with respect to the recess 18 indicating the traveling line, and the columnar body 21 and the columnar body 13 are linear from the viewpoint of satisfactorily regulating the traveling angle of the puncture needle. It is provided so that the shortest distance from the recess 18 which is the recess 18 of the above is the same. The columnar body 11 and the columnar body 21 may be provided at intervals that allow the puncture needle to pass, for example. In the example shown in FIG. 1 (b), the columnar body 11 and the columnar body 21 are provided in parallel, and the distance between them is equal, but the distance is set according to the size of the outer diameter of the puncture needle. , May be provided so that the distance becomes narrower toward the support portion 17. Alternatively, the columnar body 11 and the columnar body 21 may have a conical shape or a truncated cone shape. As the fixing means, the same one as in the first embodiment can be adopted.

In the second embodiment, the puncture needle is positioned between the columnar body 11 and the columnar body 21 and between the columnar body 12 and the columnar body 13 along the recess 18 extending linearly indicating the traveling line. Then, as in the case of the first embodiment, the traveling angle of the puncture needle with respect to the traveling line direction can be regulated by the combination of the columnar body 11 and the columnar body 13 or by the combination of the columnar body 21 and the columnar body 12. it can. The combination of the columnar body 21 and the columnar body 12 will be described. For example, the side surface portion 22 is brought into contact with the side surface 22 constituting the locking portion of the columnar body 21 by pressing the puncture needle from the recess 18 side. The contact portion serves as a fulcrum, and the side surface 15 constituting the locking portion of the columnar body 12 can be brought into contact with the puncture needle. In this way, the columnar body 21 and the columnar body 12 that are separated from each other in the traveling line direction are side surfaces of the puncture needle from both sides of the columnar body 21 and the columnar body 12 side that are orthogonal to the traveling direction of the puncture needle. Contact with. Thereby, the traveling angle of the puncture needle with respect to the traveling line direction can be regulated. Since it is possible to regulate the traveling angle of the puncture needle with respect to the traveling line direction at both ends of the main body 1b in the traveling line direction as in the second embodiment, the traveling angle can be more reliably determined as compared with the first embodiment. Can be regulated.

As a modification of the second embodiment, for example, a structure in which the height of the support portion 17 from the front surface 17a or the back surface 17b gradually or gradually decreases from one side to the other along the recess 18 is formed as a traveling angle regulating unit. Examples include the puncture assisting tool provided as the above.

(Example 3)
FIG. 1C is a perspective view schematically showing the main body 1c of the puncture assisting tool according to the third embodiment. The puncture assisting tool according to the third embodiment includes a main body 1c having a regulating portion 10 and a supporting portion 17, and a fixing means. As the puncture assisting tool, in the puncturing assisting tool according to the first embodiment, instead of the columnar body 11 and the columnar body 12, a plate-shaped body 23 having a continuous wall surface 24 along the recess 18 indicating the running line direction is provided. It is a thing. Since it is the same as that of the first embodiment except that the plate-shaped body 23 having the wall surface 24 is provided, the same configurations are designated by the same reference numerals, and only different configurations will be described. The third embodiment has one columnar body 13 as the straight-ahead direction regulating portion 10a of the regulating portion 10, and a wall surface 24 continuous along the recess 18. The wall surface 24 has a portion that can be locked by contacting the side surface of the puncture needle that serves as a locking portion. In the example shown in FIG. 1 (c), the wall surface 24 faces the linear recess 18 side indicating the direction of the traveling line, is a plane parallel to the concave portion 18, and faces the columnar body 11 side. It is a parallel plane. The wall surface 24 constitutes one surface of the plate-shaped body 23, and the thickness of the plate-shaped body 23 is constant. In the example shown in FIG. 1 (c), the columnar body 13 and the wall surface 24 are provided in parallel, and the distance between them is equal, but the distance is set according to the size of the outer diameter of the puncture needle. It may be provided so that the interval becomes narrower toward the support portion 17. Alternatively, the columnar body 13 may have a conical shape or a truncated cone shape, and the thickness of the wall surface 24 of the plate-shaped body 23 may be changed so as to be inclined with respect to the surface 17a of the support portion 17. As the fixing means, the same configuration as in the case of the first embodiment can be adopted, but from the viewpoint of further improving the fixing property of the main body 1c to the skin, the side on which the plate-shaped body 23 is installed is a plate. It may include a portion extending from the body 23 through the surface 17a of the support portion 17 so as to extend further to the outside of the support portion 17.

In the third embodiment, the puncture needle is positioned between the columnar body 13 and the wall surface 24 along the linearly extending recess 18 indicating the traveling line. Then, for example, on the side where the columnar body 13 is not provided, the puncture needle is pressed against the portion constituting the locking portion of the wall surface 24 from the recess 18 side to bring it into contact with the contact portion of the wall surface 24. As a fulcrum, the side surface 16 constituting the locking portion of the columnar body 13 can be brought into contact with the puncture needle. In this way, the end of the wall surface 24 that is separated from the columnar body 13 in the traveling line direction and the columnar body 13 are in the direction orthogonal to the traveling direction of the puncture needle. From both sides of the side, abut on the side of the puncture needle. Thereby, the traveling angle of the puncture needle with respect to the traveling line direction can be regulated.

As a modification of the third embodiment, for example, a structure in which the height of the support portion 17 from the front surface 17a or the back surface 17b gradually or gradually decreases from one side to the other along the recess 18 is formed as a traveling angle regulating unit. Examples include the puncture assisting tool provided as the above.

(Example 4)
FIG. 2A is a perspective sectional view for explaining the structure of the main body 2a of the puncture assisting tool according to the fourth embodiment. In FIG. 2A, the portion shown by the solid line and the portion shown by the alternate long and short dash line have a symmetrical structure. The puncture assisting tool according to the fourth embodiment includes a main body 2a having a regulating portion 27 and fixing means. The main body 2a has a tetrahedron having a bottom surface 29 (in this example, a cube), and a notch portion that can follow a plane including a running line of blood vessels assumed on the skin surface is formed as a regulating portion 27. Has a structure. The cutout portion (regulating portion 27) has a wall surface 25 and a wall surface 26 that can be continuous along the traveling line. The wall surface 25 and the wall surface 26 are formed so as to face each other and parallel to each other, and form a gap in the main body 2a that can accept the puncture needle. The straight-ahead direction regulating portion 27a is formed by the facing wall surface 25 and the wall surface 26. Further, for example, a portion near the one end 25a orthogonal to the traveling line direction of the wall surface 25, a portion near the other end 25b or the entire wall surface 25, and a portion near the one end 26a orthogonal to the traveling line direction of the wall surface 26, the other. The vicinity of the end 26b or the entire wall surface 26 may form a locking portion. Further, depending on the traveling direction of the puncture needle, the end portions 25e and 26e parallel to the traveling line direction of the wall surfaces 25 and 26 may also form the locking portion. The portion near the end of the wall surface and the wall surface can be locked while abutting with the side surface of the puncture needle from both sides in the direction orthogonal to the traveling direction of the puncture needle. The wall surface 25 and the wall surface 26 are continuous on the side close to the skin, and a bottom portion 28 extending from one end 25a, 26a of the wall surface 25, 26 to the other end 25b, 26b is formed along the traveling line direction. The bottom 28 is a continuous flat surface and is provided parallel to the skin. In this way, the regulating portion 27 opens at both ends along the traveling line direction, and also opens the surface on the side facing the bottom portion 28, receives the puncture needle, and slides along the traveling line. Is formed. The bottom surface 29 may form a support portion that supports the regulation portion 27 from the skin side. As the fixing means, for example, those shown in the above-mentioned (i) to (vii) may be provided on the bottom surface 29 depending on the situation. Of these, for example, the various double-sided tapes described above can be provided. The double-sided tape may be provided on the entire bottom surface 29 or a part of the bottom surface 29, or may be provided on the entire or a part of the bottom surface 29, and for example, the same as shown in FIG. 13 (a) described later. In addition, a portion extending from the bottom surface 29 to the outside of the support portion 17 may be included. Further, the fixing means may be the above-mentioned various single-sided tapes that are continuous from the surfaces 25c and 26c opposite to the wall surfaces 25 and 26 and extend to the skin surface. Further, the fixing means may be provided with notches (reference numerals 100, 102, 103) as shown in FIGS. 14 (a) or 14 (b) described later.

(Example 5)
FIG. 2B is a perspective sectional view for explaining the structure of the main body 2b of the puncture assisting tool according to the fifth embodiment. In FIG. 2B, the portion shown by the solid line and the portion shown by the alternate long and short dash line have a symmetrical structure. The puncture assisting tool according to the fifth embodiment includes a main body 2b having a regulating portion 27 and a supporting portion 30, and a fixing means. The main body 2b has the same structure of the regulation unit 27 as in the fourth embodiment. On the other hand, in the puncture aid, the distance between the wall surface 25c and the wall surface 26c in the fourth embodiment is reduced to form the wall surface 25d and the wall surface 26d, and the wall surfaces 25d and 26d are formed along the skin surface in the portion close to the skin. A support portion 30 is provided which extends in parallel and supports a portion including the regulation portion 27. A plate-like body is formed by the wall surface 25 and the wall surface 25d. That is, this plate-like body has a flat plate shape having a constant thickness, the wall surface 25 constitutes one surface thereof, and the wall surface 25d constitutes the other surface. Similarly, on the wall surface 26 and the wall surface 26d, a plate-like body is formed by both of them. The same bottom surface 29 as in Example 4 is formed in a portion of the main body 2b composed of the plate-shaped body and the support portion 30 in the vicinity of the skin surface. The bottom surface 29 may be provided with the same fixing means as in Example 4, for example. Further, the fixing means may be the above-mentioned various single-sided tapes that are continuous from the surface of the support portion 30 and extend to the skin surface. The same configuration as in the fourth embodiment is designated by the same reference numerals, and the description thereof will be omitted.

The puncture assisting tool according to the first to fifth embodiments is an embodiment in which only the straight-ahead direction regulating portions 10a and 27a are provided on the regulating portions 10 and 27. In such an embodiment, the angle of travel with respect to the skin can be arbitrarily selected at the discretion of the operator.

(Example 6)
FIG. 3A is a perspective sectional view for explaining the structure of the main body 3a of the puncture assisting tool according to the sixth embodiment. In FIG. 3A, the portion shown by the solid line and the portion shown by the alternate long and short dash line have a symmetrical structure. The puncture assisting tool according to the sixth embodiment includes a main body 3a having a regulating portion 33 and a fixing means. The sixth embodiment is a modified example in which the advancing angle regulating portion is provided on the main body 2a of the puncture assisting tool of the fourth embodiment. Therefore, the same reference numerals are given to common configurations, and the description thereof will be omitted. The main body 3a has a tetrahedron having a bottom surface 29 (in this example, a cube), and a notch portion capable of following a plane including a running line of blood vessels assumed on the skin surface is formed as a regulating portion 33. Has a structure that is The cutout portion (regulating portion 33) has a wall surface 31 and a wall surface 32 that are continuous along the traveling line. The wall surface 31 and the wall surface 32 are formed so as to face each other and parallel to each other, and form a gap in the main body 3a that can accept the puncture needle. The straight-ahead direction regulating portion 33a is formed by the facing wall surface 31 and the wall surface 32. Further, the vicinity of the end 31a orthogonal to the traveling line direction of the wall surface 31, the vicinity of the end 31b parallel to the traveling line direction of the wall surface 31 or the entire wall surface 31, and orthogonal to the traveling line direction of the wall surface 32. A locking portion may be formed by a portion near the end portion 32a, a portion near the end portion 32b parallel to the traveling line direction of the wall surface 32, or the entire wall surface 32. The portion near the end of the wall surface and the wall surface can be locked while abutting with the side surface of the puncture needle from both sides in the direction orthogonal to the traveling direction of the puncture needle. An inclined portion 34 is formed between the wall surface 31 and the wall surface 32 so as to be continuously inclined so that the height from the skin surface becomes smaller as the puncture position on the skin is approached along the traveling line direction. The advancing angle regulating portion 33b is formed by the inclined portion 34. In this example, the side close to the puncture position on the skin is the side of the end indicated by reference numerals 31a and 32a. The inclined portion 34 is continuous with the wall surfaces 31 and 32, and is formed as an inclined surface continuously from one end 31a and 32a to the other end 31b and 32b along the traveling direction of the puncture needle. The inclination angle α of the inclined portion 34 with respect to the skin is determined according to the depth of the blood vessel to be punctured from the skin surface, the puncturing method, and the like. As mentioned above, for example, when puncturing a human jugular vein by the landmark method, it can generally be set to 30 ° to 45 °. Also, when puncturing a human jugular vein under ultrasound guidance, it can generally be set to 60 °. In this example, α is 45 °. The inclined portion 34 is formed so that a portion 35 in which the distance between the facing wall surfaces becomes narrower as it approaches the skin side in a direction orthogonal to the traveling direction of the puncture needle is continuous from the wall surfaces 31 and 32. There is. In this example, the portion represented by the reference numeral 35 has a structure having a V-shaped cross section. The portion indicated by reference numeral 35 having a structure having a V-shaped cross section may have the functions of both a straight-ahead direction regulating unit and a traveling angle regulating unit. The regulating portion 33 opens at both ends (one end and the other end indicated by reference numerals 31a, 32a, 31b, 32b) along the traveling direction of the puncture needle, and also opens a surface on the side facing the inclined portion 34. , Accepts the puncture needle and forms a slidable gap along the travel line. As the fixing means, the same configuration as in the fourth embodiment can be adopted.

(Example 7)
FIG. 3B is a perspective sectional view for explaining the structure of the main body 3b of the puncture assisting tool according to the seventh embodiment. In FIG. 3B, the portion shown by the solid line and the portion shown by the alternate long and short dash line have a symmetrical structure. The puncture assisting tool according to the seventh embodiment includes a main body 3a having a regulating portion 33 and a fixing means. The main body 3b has the same structure of the regulating portion 33 as the main body 3a of the sixth embodiment. On the other hand, in the main body 3b of the puncture assisting tool according to the seventh embodiment, the distance between the wall surface 25c and the wall surface 26c in the main body 3a of the sixth embodiment is reduced to form the wall surfaces 25d and 26d, and the portions close to the skin are formed. , A support portion 30 extending from the wall surfaces 25d and 26d along the skin surface and supporting a portion including the regulation portion 33 is formed. The support portion 30 has the same structure as the main body 2b of the fifth embodiment. As described above, the puncture assisting tool according to the seventh embodiment is a combination of the sixth and fifth embodiments, the same reference numerals are given to the same configurations, and the description thereof will be omitted. Further, as the fixing means, for example, the same configuration as in the fifth embodiment can be adopted.

(Example 8)
FIG. 4A is a perspective sectional view for explaining the structure of the main body 4a of the puncture assisting tool according to the eighth embodiment. In FIG. 4A, the portion shown by the solid line and the portion shown by the alternate long and short dash line have a symmetrical structure. The puncture assisting tool according to the eighth embodiment includes a main body 4a having a regulating portion 38 and fixing means. Example 8 is a modified example in which the inclination angle α of the inclined portion 34 with respect to the skin in Example 6 is made larger. The main body 4a has a tetrahedron having a bottom surface 41 (in this example, a rectangular parallelepiped) having a notch portion 38 formed as a regulation portion 38 that can follow a plane including a running line of blood vessels assumed on the skin surface. Has a structure that is The cutout portion (regulating portion 38) has a wall surface 36 and a wall surface 37 that can be continuous along the traveling line. The wall surface 36 and the wall surface 37 are formed so as to face each other and parallel to each other, and form a gap in the main body 4a that can accept the puncture needle. The straight-ahead direction regulating portion 38a is formed by the facing wall surface 36 and the wall surface 37. Further, the vicinity of the end portion 36a orthogonal to the traveling line direction of the wall surface 36, the vicinity portion of the end portion 36b parallel to the traveling line direction of the wall surface 36 or the entire wall surface 36, and orthogonal to the traveling line direction of the wall surface 37. A portion near the end portion 37a to be formed, a portion near the end portion 37b parallel to the traveling line direction of the wall surface 36, or the entire wall surface 37 may form a locking portion. The portion near the end of the wall surface and the wall surface can be locked while abutting with the side surface of the puncture needle from both sides in the direction orthogonal to the traveling direction of the puncture needle. An inclined portion 39 is formed between the wall surface 36 and the wall surface 37 so as to be continuously inclined so that the height from the skin surface becomes smaller as the puncture position on the skin is approached along the traveling line direction. The advancing angle regulating portion 38b is formed by the inclined portion 39. In this example, the side of the skin that is close to the puncture position is the side of one end indicated by reference numerals 36a and 37a. The inclined portion 39 is formed continuously from one end portion 36a, 37a to the other end portion 36b, 37b along the traveling direction of the puncture needle. The inclination angle β of the inclined portion 39 with respect to the skin is a larger angle than that of the sixth embodiment as described above. In this example, it is 60 °. The inclined portion 39 is formed with a portion 40 in which the distance between the facing wall surfaces becomes narrower as the skin approaches the skin side in a direction orthogonal to the traveling direction of the puncture needle. In this example, the portion represented by the reference numeral 35 has a structure having a V-shaped cross section. The regulating portion 38 opens at both ends (one end and the other end indicated by reference numerals 36a, 37a, 36b, 37b) along the traveling direction of the puncture needle, and also opens a surface on the side facing the inclined portion 39. , Accepts the puncture needle and forms a slidable gap along the travel line. As the fixing means, for example, those shown in the above-mentioned (i) to (vii) may be provided on the bottom surface 41 depending on the situation. Of these, for example, the various double-sided tapes described above can be provided. The mode in which the double-sided tape is provided on the bottom surface 41 is the same as in the fourth embodiment. Further, the fixing means is the above-mentioned various single-sided tapes parallel to the wall surfaces 36 and 37, continuous from the side wall surfaces 36c and 37c of the tetrahedron constituting the main body 4a, and extending to the skin surface, as in the fourth embodiment. You may. Further, as in the fourth embodiment, the fixing means is provided with notches (reference numerals 100, 102, 103) as shown in FIGS. 14 (a) or 14 (b) described later. May be good.

(Example 9)
FIG. 4B is a perspective sectional view for explaining the structure of the main body 4b of the puncture assisting tool according to the ninth embodiment. In FIG. 4B, the portion shown by the solid line and the portion shown by the alternate long and short dash line have a symmetrical structure. The puncture assisting tool according to the ninth embodiment includes a main body 4b having a regulating portion 38 and fixing means. The main body 4b has the same structure of the regulation unit 38 as that of the eighth embodiment. On the other hand, in the puncture assisting tool according to the ninth embodiment, the distance between the wall surface 36c and the wall surface 37c in the eighth embodiment is reduced to form the wall surfaces 36d and 37d, and the wall surfaces 36d and 37d are formed on the portion close to the skin. A support portion 42 that extends along the skin surface and supports a portion including the regulation portion 38 is formed. The support portion 42 has the same structure as the support portion 30 of Examples 5 and 7. As described above, the puncture assisting portion according to the ninth embodiment is a combination of the eighth and the seventh embodiments, the same reference numerals are given to the same configurations, and the description thereof will be omitted. Further, as the fixing means, for example, the same configuration as in the fifth embodiment can be adopted.

(Example 10)
FIG. 4C is a perspective sectional view for explaining the structure of the main body 4c of the puncture assisting tool according to the tenth embodiment. In FIG. 4C, the portion shown by the solid line and the portion shown by the alternate long and short dash line have a symmetrical structure. The puncture assisting tool according to the tenth embodiment includes a main body 4c having a regulating portion 38 and fixing means. The main body 4c has the same structure as the regulation unit 38 of the eighth embodiment. On the other hand, the puncture assisting tool according to the tenth embodiment retains the structure of the rectangular parallelepiped main body 4a of the eighth embodiment as it is, the entire structure of the regulating portion 38 of the eighth embodiment or the structure of a portion from the bottom surface 41 to a predetermined height. At the same time, it was changed to a cubic shape. In the main body 4c, the bottom surface (reference numerals 41a) and the wall surfaces (reference numerals 36e and 37e) parallel to the wall surfaces 36 and 37 of the regulating portion 38 and forming the side surfaces of the cube are square. The puncture assisting tool according to the tenth embodiment is a modification of the eighth embodiment, the same reference numerals are given to the same configurations, and the description thereof will be omitted. As the fixing means, for example, the same configuration as in the eighth embodiment can be adopted.

(Example 11)
FIG. 5 (a) is a perspective view for explaining the structure of the main body 5a of the puncture assisting tool according to the eleventh embodiment, and FIG. 5 (b) is a cross-sectional view taken along the line I-I perspective in FIG. 5 (a). It is a figure. In the main body 4c of the tenth embodiment, the puncture assisting tool according to the eleventh embodiment is provided with the shape of the inclined portion 39 on the traveling line as the display surface 43 including the display line 43a on the outside of the wall surface 36 and the wall surface 37. .. The puncture assisting tool according to the eleventh embodiment includes a main body 5a having a regulating portion 38 and fixing means. On the main body 5a, wall surfaces 36f and 37f parallel to the wall surfaces 36 and 37 are formed on the side opposite to the side where the inclined portion 39 is provided with respect to the wall surfaces 36 and 37, and the wall surfaces 36 and 37 and the wall surface 36f, A flat plate-like body is formed with 37f. Further, wall surfaces 36g and 37g extending from the peripheral edge of the bottom surface 41 in the height direction and parallel to the wall surfaces 36 and 37 are formed. The display surface 43 is continuous with the wall surfaces 36f and 37f and the wall surfaces 36g and 37g. The puncture assisting tool according to the eleventh embodiment is a modification of the tenth embodiment, the same reference numerals are given to the same configurations, and the description thereof will be omitted. In addition, the corresponding part of the tenth embodiment is referred to for the part where the corresponding reference numeral is not described. As the fixing means, for example, the same configuration as in the tenth embodiment can be adopted.

(Example 12)
FIG. 6 (a) is a perspective view for explaining the structure of the main body 5b of the puncture assisting tool according to the twelfth embodiment, and FIG. 6 (b) is a cross-sectional view on one side of the squint line II-II in FIG. It is a figure. In the puncture assist tool according to the twelfth embodiment, the shape of the inclined portion 34 of the traveling angle regulating portion 33b in the sixth embodiment on the traveling line is changed from a straight line to a convex polygonal line, and the shape of the inclined portion on the traveling line is changed. , It is also provided on the outside between the wall surfaces constituting the locking portion. The puncture assisting tool according to the twelfth embodiment includes a main body 5b having a regulating portion 46 and fixing means. The regulation unit 46 has a wall surface 44 and a wall surface 45 that are continuous along the traveling line. The wall surface 44 and the wall surface 45 are formed so as to face each other and parallel to each other, and form a gap in the main body 5b that can accept the puncture needle. The straight-ahead direction regulating portion 46a is formed by the facing wall surface 44 and the wall surface 45. Further, the vicinity of one end 44a orthogonal to the traveling line direction of the wall surface 44, the vicinity of the other end 44b or the entire wall surface 44, and one end 45a orthogonal to the traveling line direction of the wall surface 45. A portion near the surface, a portion near the other end portion 45b, or the entire wall surface 45 may form a locking portion. Further, the end portions 44c and 45c parallel to the traveling line direction of the wall surfaces 44 and 45 may also form the locking portion. The portion near the end of the wall surface and the wall surface can be locked while abutting with the side surface of the puncture needle from both sides in the direction orthogonal to the traveling direction of the puncture needle. Between the wall surface 44 and the wall surface 45, a portion 47a that is continuously inclined so that the height from the skin surface becomes smaller as the puncture position on the skin is approached along the traveling line direction, and the inclined portion. An inclined portion 47 composed of a portion 47b parallel to the skin surface continuous from the side opposite to the puncture position of 47a is formed. The advancing angle regulating portion 46b is formed by the inclined portion 47. The angle of the inclined portion 47a with respect to the skin is the same angle α (45 °) as in Example 6, but is not limited to this. The inclined portion 47 is formed so that a portion 48 in which the distance between the facing wall surfaces becomes narrower as it approaches the skin side in a direction orthogonal to the traveling direction of the puncture needle is continuous from the wall surfaces 44 and 45. There is. In this example, the portion indicated by the reference numeral 48 has a V-shaped cross section. The regulating portion 46 opens at the ends of the wall surfaces 44 and 45 (peripheral portions indicated by reference numerals 44a, 45a, 44b, 45b, 44c, 45c) along the traveling direction of the puncture needle, receives the puncture needle, and travels. A slidable gap is formed along the line. On the main body 5b, wall surfaces 44d and 45d parallel to the wall surfaces 44 and 45 are formed on the side opposite to the side where the inclined portion 47 is provided with respect to the wall surfaces 44 and 45, and the wall surfaces 44 and 45 and the wall surface 44d, A flat plate-like body is formed with 45d. Further, the shape of the inclined portion 47 between the wall surface 44 and the wall surface 45 on the traveling line is provided as a display surface 49 including the display line 49a on the outside side opposite to the direction in which the wall surface 44 and the wall surface 45 face. ing. The portion corresponding to the inclined portion 47a is formed with an inclined surface having an angle α, and the portion corresponding to the portion 47b parallel to the skin surface is formed with a surface having an angle of 0 °. Further, the main body 5b extends from the peripheral edge of the bottom surface 41 in the height direction, and the wall surfaces 44e and 45e are formed parallel to the wall surfaces 44 and 45 and facing in the opposite directions. As the fixing means, for example, those shown in the above (i) to (vii) may be provided depending on the situation. Of these, for example, the above-mentioned various double-sided tapes and the like can be provided on the bottom surface 41 of the main body 5b. The mode in which the double-sided tape is provided on the bottom surface 41 is the same as in the fourth embodiment. Further, for example, the above-mentioned various single-sided tapes may be provided so as to be continuous from the display surface 49 and the wall surfaces 44d, 44e, 45d, 45e and extend to the skin surface. Further, the fixing means may be provided with notches (reference numerals 100, 102, 103) as shown in FIGS. 14 (a) or 14 (b) described later.

(Example 13)
FIG. 7 (a) is a perspective view for explaining the structure of the main body 6a of the puncture assisting tool according to the thirteenth embodiment, and FIG. 7 (b) is a one-sided cross section of the perspective taken along line III-III in FIG. 7 (a). It is a figure. The puncture assisting tool according to the thirteenth embodiment is a modified example of the puncturing assisting tool of the eleventh embodiment in which a support portion 52 for supporting the main body 5a from the skin side is formed on the bottom surface 41 of the main body 5a along the skin surface. is there. The puncture assisting tool according to the thirteenth embodiment includes a main body 5a of the eleventh embodiment, a main body 6a having a support portion 52, and a fixing means. The support portion 52 has a flat plate-like structure, and a protruding portion 52a is formed so as to extend from the wall surfaces 36g and 37g in the direction facing the wall surfaces 36g and 37g only in the direction orthogonal to the wall surfaces 36 and 37. A bottom surface 50 is formed on the side of the support portion 52 facing the skin. As the fixing means, for example, those shown in the above (i) to (vii) may be adopted depending on the situation. Among them, for example, the above-mentioned various double-sided tapes and the like can be provided on the bottom surface 50. The double-sided tape may be provided on the entire bottom surface 50, may be provided on a part of the bottom surface 50, or may be provided on the entire or a part of the bottom surface 50, and for example, the same as shown in FIG. 13 (a) described later. In addition, a portion extending from the bottom surface 50 to the outside of the support portion 52a may be included. Further, the various single-sided tapes described above may be provided so as to be continuous from the surface of the display surface 43, the wall surface 36f, 36g, 37f, 37g, the protruding portion 52a of the support portion 52, and the like and extend to the skin surface (for example,). See FIG. 13 (b) for an example of installation of the fixing means). Further, the fixing means may be provided with notches (reference numerals 100, 102, 103) as shown in FIGS. 14 (a) or 14 (b) described later. The puncture assisting portion according to the thirteenth embodiment is a modification of the eleventh embodiment, and the same reference numerals are given to the same configurations, and the description thereof will be omitted.

(Example 14)
FIG. 8A is a perspective view for explaining the structure of the puncture assisting tool according to the fourteenth embodiment, and FIG. 8B is a one-sided sectional view taken along line IV-IV in FIG. 8A. .. The puncture assisting tool according to the fourteenth embodiment is the puncture assisting tool of the thirteenth embodiment, which is continuously linearly parallel to the wall surfaces 36 and 37 on the back surface of the main body 6a on the side opposite to the side where the regulation portion 38 is provided. A deformation in which a recess 51 is formed and a plate-shaped portion extending toward the puncture position is formed in the support portion 52 of the main body 6a, and a notch portion through which the puncture needle can puncture the skin is provided in the plate-shaped portion. This is an example. The puncture assisting tool according to the fourteenth embodiment includes a main body 5a of the eleventh embodiment, a main body 6b having a support portion 52b, and a fixing means. The recess 51 is formed on the back surface of the main body 6b over the entire length in the height direction from the side of the main body 6b close to the skin. The recess 51 makes it easy to grasp the position of the traveling line even from the back side of the main body 6b. The recess 51 may be colored differently from other parts. The support portion 52b extends along the skin surface in the direction orthogonal to the wall surfaces 36 and 37 from the wall surfaces 36 g and 37 g toward the wall surfaces 36 g and 37 g, and is punctured in a direction parallel to the wall surfaces 36 and 37. It has a flat structure extending along the skin surface toward the side of the skin. The support portion 52b has a plate-shaped protrusion 52c extending along the skin surface in the facing direction of the wall surfaces 36g and 37g, and a portion along the skin surface from a portion close to the puncture position of the regulation portion 38 toward the puncture position. It has a plate-shaped protrusion 53 extending from the surface. Further, the protruding portion 53 is provided with a notch portion 54 between the wall surface 36 and the wall surface 37 so that the puncture needle can puncture the skin on the extension in the direction in which the puncture needle advances. A bottom surface 55 is formed on the side of the support portion 52b facing the skin. As the fixing means, the same one as in the thirteenth embodiment can be adopted. For example, the above-mentioned various double-sided tapes and the like can be provided on the bottom surface 55. In this case, the double-sided tape can be provided on the bottom surface 55 in the same manner as in the thirteenth embodiment (see, for example, FIGS. 13 (a), 14 (a), and (b) as examples of fixing means). Further, the various single-sided tapes described above may be provided so as to be continuous from the surface of the display surface 43, the wall surfaces 36f, 36g, 37f, 37g, the protruding portion 52c of the support portion 52b, and the like and extend to the skin surface (for example,). See FIG. 13 (b) for an example of installation of the fixing means). The puncture assisting portion according to the 14th embodiment is a modification of the 13th embodiment, and the same reference numerals are given to the same configurations, and the description thereof will be omitted.

(Example 15)
9 (a) is a perspective view for explaining the structure of the main body 7a of the puncture assisting tool according to the fifteenth embodiment, and FIG. 9 (b) is a cross section on one side of the VV line perspective in FIG. 9 (a). It is a figure. In the puncture assist tool according to the fifteenth embodiment, in the puncture assist tool according to the eleventh embodiment, the shape of the inclined portion 39 on the traveling line is changed from a straight line to a convex polygonal line shape, and the shape on the traveling line is defined as the wall surface 36. It is also provided on the outside of the wall surface 37. The puncture assisting tool according to the fifteenth embodiment includes a main body 7a having a regulating portion 58 and fixing means. The regulation unit 58 has a wall surface 56 and a wall surface 57 that are continuous along the traveling line. The wall surface 56 and the wall surface 57 are formed so as to face each other and parallel to each other, and form a gap in the main body 7a that can accept the puncture needle. The straight-ahead direction regulating portion 58a is formed by the facing wall surface 56 and the wall surface 57. The portions of the wall surface 56 and the wall surface 57 corresponding to the wall surface 36 and the wall surface 37 of the eleventh embodiment may form a locking portion. Between the wall surface 56 and the wall surface 57, an inclined portion 59 that continuously inclines so that the height from the skin surface decreases as the puncture position on the skin approaches along the traveling line direction is a traveling angle regulating portion. It is formed as 58b. Further, the inclined portion 59 has a depth-direction locking portion capable of contacting the puncture needle. The angle of the inclined portion 59 with respect to the skin changes in two steps in the order of α and β (α> β) from the side of the puncture position, and the shape on the traveling line has the shape of a convex polygonal line. The inclined portion 59 is formed with a continuous recess 60 having a structure having a V-shaped cross section. The shape of the inclined portion 59 on the traveling line is provided as a display surface 62 including the display line 62a on the outside side opposite to the direction in which the wall surface 56 and the wall surface 57 face each other. The display surface 62 is formed with an inclined surface having an angle α at a portion corresponding to the angle α of the inclined portion 59 and an inclined surface having an angle β at a portion corresponding to the angle β. The portion of the main body 7a close to the skin has a bottom surface 61. As the fixing means, the same configuration as in the case of the eleventh embodiment can be adopted.

(Example 16)
10 (a) is a perspective view for explaining the structure of the main body 7b of the puncture assisting tool according to the 16th embodiment, and FIG. 10 (b) is a cross-sectional view on one side of the VI-VI line perspective in FIG. 10 (a). It is a figure. In the puncture assisting tool according to the 16th embodiment, in the puncturing assisting tool according to the 11th embodiment, the shape of the inclined portion 39 on the traveling line is changed from a straight line to a convex curve shape, and the shape on the traveling line is defined as the wall surface 36. It is also provided on the outside of the wall surface 37. The puncture assisting tool according to the sixteenth embodiment includes a main body 7b having a regulating portion 65 and fixing means. The regulation unit 65 has a wall surface 63 and a wall surface 64 that are continuous along the traveling line. The wall surface 63 and the wall surface 64 are formed so as to face each other and parallel to each other, and form a gap in the main body 7b that can accept the puncture needle. The straight-ahead direction regulating portion 65a is formed by the facing wall surface 63 and the wall surface 64. The portions of the wall surface 63 and the wall surface 64 corresponding to the wall surface 36 and the wall surface 37 of the eleventh embodiment may form a locking portion. Between the wall surface 63 and the wall surface 64, an inclined portion 66 that continuously inclines so that the height from the skin surface decreases as the puncture position on the skin approaches along the traveling line direction is a traveling angle regulating portion. Formed as 65b. Further, the inclined portion 66 has a depth-direction locking portion capable of contacting the puncture needle. The inclined portion 66 has a convex curve shape on the traveling line. In this example, it is a quarter arc, but it is not limited to this. The inclined portion 66 is formed with a continuous recess 67 having a structure having a V-shaped cross section. The shape of the inclined portion 66 on the traveling line is provided as a display surface 69 including a display line 69a on the outside side opposite to the direction in which the wall surface 63 and the wall surface 64 face each other. As the fixing means, the same configuration as in the case of the eleventh embodiment can be adopted.

(Example 17)
11 (a) is a perspective view for explaining the structure of the main body 8a of the puncture assisting tool according to the seventeenth embodiment, and FIG. 11 (b) is a cross-sectional view on one side of the VII-VII line perspective in FIG. 11 (a). It is a figure. The puncture assisting tool according to the 17th embodiment is a modified example of the puncturing assisting tool according to the 11th embodiment. In the eleventh embodiment, the puncture assisting tool according to the seventeenth embodiment mainly forms a support portion having a notch on the entire circumference of the main body 5a on the side close to the skin, and (b) the regulating portion 38. On the back surface of the side opposite to the side provided with the above, a recess is formed in a straight line parallel to the wall surfaces 36 and 37, and (c) an internal space is formed in the main body portion 5a excluding the support portion. It was done. The puncture assisting tool according to the seventeenth embodiment includes a main body 8a having a regulating portion 72 and a supporting portion 77, and fixing means. The regulation unit 72 has a wall surface 70 and a wall surface 71 that are continuous along the traveling line. The wall surface 70 and the wall surface 71 are formed so as to face each other and parallel to each other, and form a gap in the main body 8a that can accept the puncture needle. The straight-ahead direction regulating portion 72a is formed by the facing wall surface 70 and the wall surface 71. The portions of the wall surface 70 and the wall surface 71 corresponding to the wall surface 44 and the wall surface 45 of the eleventh embodiment may form a locking portion. Between the wall surface 70 and the wall surface 71, an inclined portion 73 that continuously inclines so that the height from the skin surface decreases as the puncture position on the skin approaches along the traveling line direction is a traveling angle regulating portion. It is formed as 72b. Further, the inclined portion 73 has a traveling angle regulating portion capable of contacting the puncture needle. The inclined portion 73 has an angle of α (45 °) with respect to the skin, and has a straight shape on the traveling line. A continuous portion 74 having a structure having a V-shaped cross section is formed on the inclined portion 73. The main body 8a is formed with a display surface 75 including a display line 75a corresponding to the shape of the inclined portion 73 on the traveling line on the outside of the wall surface 70 and the wall surface 71. A recess 76 that is linearly continuous in parallel with the wall surfaces 70 and 71 is formed on the back surface of the main body 8a on the side opposite to the side on which the regulation portion 72 is provided. The recess 76 makes it easy to grasp the position of the traveling line even from the back side of the main body 8a. A flat plate-shaped support portion 77 is formed on the entire circumference of the main body 8a on the side close to the skin. A notch 78 is provided on the side extending from the inclined portion 73 of the support portion 77 and close to the puncture position, and the puncture needle can be punctured through the notch 78. Further, the recess 76 provided on the back surface of the main body 8a extends to the support portion 77 and forms a notch in the support portion 77. The main body 8a has a space 79 formed inside other than the support portion 77 from the viewpoint of reducing the amount of raw materials used. On the bottom surface side of the support portion 77 close to the skin, for example, those shown in (i) to (vii) described above can be adopted as fixing means depending on the situation. Among them, for example, the above-mentioned various double-sided tapes and the like can be provided. The double-sided tape may be provided on the entire bottom surface side of the support portion 77, may be provided on a part of the bottom surface side, or may be provided on the entire or a part of the bottom surface side, and for example, in FIG. 13 (a) described later. As shown, it may include a portion extending from the bottom surface portion to the outside of the support portion 77. Further, the fixing means may be provided so as to be continuous from the surface of the support portion 77 and the outer surface of the other main body 8a and extend to the skin surface (see, for example, FIG. 13B as an installation example of the fixing means). .. Further, the fixing means may be provided with notches (reference numerals 100, 102, 103) as shown in FIGS. 14 (a) or 14 (b) described later.

(Example 18)
12 (a) is a perspective view for explaining the structure of the main body 8b of the puncture assisting tool according to the eighteenth embodiment, and FIG. 12 (b) is a one-sided cross-sectional view taken along the line VIII-VIII in FIG. 12 (a). It is a figure. The puncture assisting tool according to the 18th embodiment is a modified example of the puncturing assisting tool according to the 17th embodiment. The main difference from Example 17 is that the inclination angle of the inclined portion 73 of Example 17 is increased. The puncture assisting tool according to the eighteenth embodiment includes a main body 8b having a regulating portion 82 and a supporting portion 77, and fixing means. The regulation unit 82 has a wall surface 80 and a wall surface 81 that are continuous along the traveling line. The wall surface 80 and the wall surface 81 are formed so as to face each other and parallel to each other, and form a gap in the main body 8b that can accept the puncture needle. The straight-ahead direction regulating portion 82a is formed by the facing wall surface 80 and the wall surface 81. The portions of the wall surface 80 and the wall surface 81 corresponding to the wall surface 36 and the wall surface 37 of the eleventh embodiment may form a locking portion. Between the wall surface 80 and the wall surface 81, an inclined portion 83 that continuously inclines so that the height from the skin surface decreases as the puncture position on the skin approaches along the traveling line direction is a traveling angle regulating portion. It is formed as 82b. Further, the inclined portion 83 has a depth-direction locking portion capable of contacting the puncture needle. The inclined portion 83 has an angle of β (60 °) with respect to the skin, and has a straight shape on the traveling line. The inclined portion 83 is formed with a continuous recess 84 having a structure having a V-shaped cross section. The main body 8b is formed with a display surface 85 including a display line 85a corresponding to the shape of the inclined portion 83 on the traveling line on the outside of the wall surface 80 and the wall surface 81. A recess 86 is formed on the back surface of the main body 8b on the side opposite to the side on which the regulation portion 82 is provided, which is linearly continuous in parallel with the wall surfaces 80 and 81. The recess 86 makes it easy to grasp the position of the traveling line even from the back side of the main body 8a. A flat plate-shaped support portion 87 is formed on the entire circumference of the main body 8b on the side close to the skin. A notch 88 is provided on the side of the support 87 extending from the inclined portion 83 and close to the puncture position, and the puncture needle can be punctured through the notch 88. Further, the recess 86 provided on the back surface of the main body 8b extends to the support portion 87 and forms a notch in the support portion 87. In the main body 8b, a space 89 is formed inside the main body 8b other than the support portion 87 from the viewpoint of reducing the amount of raw materials used. As the fixing means, the same configuration as in the 17th embodiment can be adopted.

(Example 19)
FIG. 13A is a perspective view for explaining the structure of the puncture assisting tool 9A according to the nineteenth embodiment. The puncture assisting portion 9A is an example in which a specific one is adopted as the fixing means of the puncture assisting tool 8B according to the eighteenth embodiment. The puncture assisting tool 9A includes the main body 8b of Example 18 and the fixing means 90. The fixing means 90 is composed of double-sided tape. The double-sided tape 90 is bonded by covering the tape body 91, the outer surface coating film 92 that covers the outside of the tape body 91 opposite to the skin side to protect the adhesive surface, and the skin side of the tape body 91. It has a skin-side covering film 93 that protects the surface. In the tape main body 91, a joint portion that is detachably joined to the skin, a connecting portion that connects to the main body 8b, and the joint portion are fixed to one surface, and the connecting portion is fixed to the surface on the opposite side. It has a sheet-shaped base material portion and. The joint portion to be joined to the skin is preferably formed on one surface side of the base material portion over the entire surface. The connecting portion connected to the support portion 87 of the main body 8b may be provided only at the portion connected to the bottom surface of the support portion 87 of the main body 8b. In this embodiment, the connecting portion is formed over the entire surface on the other surface side of the base material. The main body 8b is connected by a bottom surface of the support portion 87 and a connecting portion of the tape main body 91. When the puncture aid 9A is fixed to the skin surface, the skin-side coating film 93 is peeled off to join the skin and the joint portion.

(Example 20)
FIG. 13B is a perspective view for explaining the structure of the puncture assisting tool 9B according to the twentieth embodiment. The puncture assisting portion 9B is an example in which a specific one is adopted as the fixing means of the puncture assisting tool according to the fourteenth embodiment. The puncture assisting tool 9B includes the main body 6b of Example 14 and the fixing means 94. The fixing means 94 is composed of a single-sided tape 94. The single-sided tape 94 has a tape body 95 and a coating film 96 that covers and protects the adhesive surface of the tape body 95 with the skin. The main body 6b is connected to the adhesive surface of the tape main body 95 on the surface side of the support portion 52b. The single-sided tape 94 covers the support portion 52b from the outside and connects to the support portion 52b, and extends from the support portion 52b so as to be in contact with the skin. When the puncture aid 9B is fixed to the skin surface, the skin-side coating film 96 is peeled off to join the skin and the joint portion.

(Example 21)
FIG. 14A is a perspective view for explaining the structure of the puncture assisting tool 10A according to the twenty-first embodiment. The puncture assisting tool 10A is an example of a modification of the main body 6b of the puncturing assisting tool according to the fourteenth embodiment and an example of adopting a specific fixing means. The puncture aid 10A includes a main body 6c and a fixing means 97. The main body 6c has a support portion 52d having a narrow width in a direction orthogonal to the traveling line direction of the support portion 52b of the main body 6b, and a protruding portion 53a having a large width in the traveling line direction of the protruding portion 53 of the supporting portion 52b. A mark 98 indicating the puncture position on the skin surface is provided on the surface of the portion 53a. Other than these, it has the same configuration as the main body 6b. Therefore, for configurations other than these, the main body 6b will be referred to, and the description thereof will be omitted. The fixing means 97 has a sheet-like structure that is joined to the bottom surface of the main body 6c and extends in the radial direction from the peripheral edge of the support portion 52d of the main body 6c. The fixing means 97 is formed with a notch 100 along a traveling line so as to be continuous with the notch 54a provided in the protrusion 53a of the main body 6c. A mark 99 indicating the puncture position of the blood vessel itself or the skin surface in the living body is formed on the surface of the peripheral edge of the cutout portion 100. By connecting the auxiliary sheets on which the marks 98 and 99 indicating the puncture position are displayed from the main body side along the traveling line direction in this way, more accurate puncture according to the depth of the blood vessel becomes possible. For example, when the puncture position on the skin surface is set at the position of the mark 99, the puncture needle and the inclined portion 39 are brought into contact with each other at the end opposite to the punctured position of the inclined portion 39 of the regulating portion 38 to stabilize the puncture portion 39. Puncture is possible. Further, when the puncture needle is advanced along the inclined portion 39 to determine the puncture position of the blood vessel itself at the position of the mark 99, the mark 99 indicates the depth from the skin surface of the blood vessel, and therefore the skin corresponding to the depth. It becomes easier to determine the upper puncture position. Such a configuration having notches 98 and 100 is suitable for puncture by the landmark method. A joint portion that is detachably joined to the skin is provided on the side of the fixing means 97 that comes into contact with the skin, and a coating film that covers and protects the joint portion is formed.

(Example 22)
FIG. 14B is a perspective view for explaining the structure of the puncture assisting tool 10B according to the 22nd embodiment. The puncture assisting portion 10B is another example in the case where another means is adopted as the fixing means of the puncture assisting tool 10A according to the twenty-first embodiment. The puncture aid 10B includes a main body 6c and a fixing means 101. Since the main body 6c is the same as that of the twenty-first embodiment, the description thereof will be omitted. The fixing means 101 has a sheet-like structure in which, for example, a U-shaped or hook-shaped notch 103 having a width similar to that of the support portion 52d is provided on the side of the main body 6c close to the puncture position of the support portion 52d. Have. A mark 99a indicating the puncture position of the blood vessel itself or the skin surface in the living body or the installation position of the ultrasonic probe is formed on the surface of the portion of the portion surrounding the notch 103 that protrudes from the side of the main body 6c in the direction of the traveling line. There is. In this way, the auxiliary sheet displaying the mark 98 indicating the puncture position and the mark 99 indicating the puncture position or the installation position of the ultrasonic probe is connected from the main body side along the traveling line direction to form the puncture position or the super At the same time as specifying the installation position of the ultrasonic probe, puncture can be performed under ultrasonic guidance. Further, the fixing means 101 is provided with a cutout portion 102 having a structure corresponding to the cutout portion 54a provided in the protruding portion 53a of the support portion 52d. The joining of the fixing means 101 to the main body 6c is the same as in the 21st embodiment.

The puncture assisting tool according to the sixth to 22nd embodiments is an embodiment in which a straight-ahead direction regulating portion and a traveling angle regulating portion are provided in the regulating portion. In each of the embodiments, the traveling angle regulating portion is provided with an inclined portion having a predetermined inclination angle. This tilted portion regulates the tilt angle only from the direction close to the skin. In addition, the structure has an open gap except for the inclined portion. Therefore, the puncture needle is easily attached, and the angle of advance of the puncture needle with respect to the skin can be easily finely adjusted by the operator. The surgeon can advance the puncture needle while sliding along the entire length direction of the inclined portion, or slide along a part of the length direction at a desired position of the inclined portion. It is also possible to proceed while letting it proceed. That is, since the inclined portion enables the puncture needle to proceed while being supported from the skin side, stable puncture can be performed at a desired angle with respect to the skin. Therefore, if the puncture position on the skin surface is specified, the puncture needle can be easily advanced in the straight direction of the puncture needle along the traveling line direction of the puncture needle by the straight direction regulation unit, and the puncture needle can be easily advanced by the advance angle regulation unit. Stable puncture is possible while being supported. Therefore, it becomes possible to puncture a blood vessel in a living body that effectively suppresses erroneous puncture.

As described above, various specific examples of the puncture assisting tool have been described, but the present invention is not limited to these embodiments.

How to use the puncture aid when puncturing a blood vessel in the living body using the above puncture aid, in other words, how to puncture the blood vessel in the living body using the puncture aid and , Treatment and diagnosis method using the puncture method will be described. Examples of the target organism include humans and non-human mammals.

The method of puncturing a puncture needle into a blood vessel in the living body using a puncture assisting tool is as follows: (i) A step of confirming the running of the blood vessel to be punctured in the living body and the depth from the skin surface using an ultrasonic probe. ii) A step of attaching a mark indicating a traveling line assumed on the skin surface along the traveling of the blood vessel and a mark indicating a planned puncture position of the blood vessel in the living body to the skin surface, (iii) the traveling line of the puncture needle. The fixation is made so that the straight direction along the direction and the direction of the straight direction restricting portion of the puncture aid are parallel to each other and in the vicinity of the puncture position on the skin surface assumed from the planned puncture position of the blood vessel in the living body. It includes a step (iv) of fixing the puncture assisting tool to the skin surface by means and (v) a step of puncturing a blood vessel with a puncture needle along a straight-ahead direction regulating portion of the puncturing assisting tool. In addition, a method of treating or diagnosing a living body using such a puncture method includes, for example, a step of inserting a catheter into a blood vessel of the living body using such a puncture method.

In the following, a case where a puncture needle is percutaneously punctured into a human jugular vein will be described as an example, but the case is not limited to such a site and the type of living body. Further, the case where the puncture assist tool of Example 18 is used as the puncture assist tool will be described as an example, but the present invention is not limited thereto.

FIG. 15 is a diagram schematically showing the running of the main veins to be punctured when performing central vein puncture around the human neck. As described above, in central vein puncture, it is common to puncture the internal jugular vein 105 shown in FIG. Further, among the internal jugular vein 105, it is common to puncture in the direction indicated by the arrow 106 from the apex of the supraclavicular fossa triangle 104. Hereinafter, the case where the internal jugular vein 105 is punctured in the direction indicated by the arrow 106 from the apex of the supraclavicular fossa triangle 104 will be described as an example, but the present invention is not limited thereto.

In the step (i), the running of the internal jugular vein 105 in the body and the depth from the skin surface are confirmed by using an ultrasonic probe. Then, in the step (ii), based on this confirmation result, as shown in FIG. 16A, a mark 109 indicating a traveling line assumed on the skin surface along the traveling of the internal jugular vein 107 and a mark 109 are added. A mark 110 indicating a planned puncture position of a blood vessel in the living body is attached to the skin surface with a pen or the like. As shown in FIG. 16A, the common carotid artery runs in parallel in the vicinity of the vein 107. In the step (iii), as shown in FIG. 16 (b), after the marks 109 and 110 are attached to the skin surface, the above-mentioned puncture assist tool is applied in a straight direction along the traveling line direction of the puncture needle and the puncture assist. Assumed from the planned puncture position of the internal jugular vein 107 (the position on the internal jugular vein 107 corresponding to the intersection of the mark 109 and the mark 110) so that the direction of the straight-ahead direction regulating portion 82a of the tool is parallel. The puncture aid is fixed to the skin surface by a fixing means near the puncture position on the skin surface. Although the illustration of the fixing means of the puncture assisting tool is omitted, the above-mentioned various fixing means can be adopted. In the step (iv), the puncture needle is punctured into the internal jugular vein 107 along the straight-ahead direction restricting portion 82a of the puncture assisting tool 8B. Since the puncture assisting tool 8B has the advancing angle regulating portion 72b, the entire surface of the inclined portion 83 of the advancing angle regulating portion 82b or both ends of the inclined portion 83 in the traveling line direction for fine adjustment to a desired angle. The puncture needle is advanced along the one end while being in contact with the one end. This puncture may be performed experimentally with a test puncture needle having a small outer diameter and then with a treatment puncture needle having a desired outer diameter larger than that of the test puncture needle, or may be performed from the beginning with a treatment puncture needle. You may perform puncture using. When the landmark method is used, it is common to perform a trial puncture and then perform a main puncture with a treatment puncture needle. When the puncture is performed under ultrasonic guidance, the main puncture may be performed without the trial puncture, or both punctures may be performed. Further, when the landmark method is performed, the advancing angle of the puncture needle with respect to the skin is generally 30 ° to 45 °, and when puncturing under ultrasonic guidance, the advancing angle is 60 °. Therefore, the inclination angle of the inclined portion 83 of the puncture aid is selected according to them. Since the inclination angle α of the puncture aid is 60 °, it is suitable for puncturing under ultrasonic guidance. When the landmark method is used, for example, a puncture aid or the like having an inclination angle β of 45 ° is preferable. FIG. 17 is an explanatory diagram schematically showing a situation in which puncture is performed under ultrasonic guidance. The direction of the arrow 106 in FIG. 15, that is, the syringe 113 having the puncture needle 112 attached to the tip of the neck 116 of the human being the subject from the head side is held by the right hand 115, and the ultrasonic probe 111 is held by the left hand 114. , The state when the puncture needle 112 is punctured into the internal jugular vein along the gap of the regulation portion 82 of the puncture assisting tool is shown. By using such a puncture aid that can be directly fixed to the skin, puncture can be performed regardless of the type of ultrasonic probe. In addition, the puncture needle can be advanced along the traveling line direction by the regulating portion having a predetermined configuration. Therefore, it is possible to effectively suppress erroneous puncture of the common carotid artery running in parallel with the regulation portion. Even when it is possible to regulate the angle of advance of the puncture needle with respect to the skin as in the puncture aid shown in FIG. 17, fine adjustment by the operator is easy because the puncture needle is locked from the skin side. Therefore, erroneous puncture can be suppressed more effectively.

When the tip of the puncture needle 112 is inserted into the internal jugular vein in this way, it is aspirated by the syringe 113 to confirm that it is venous blood. In this way, the internal jugular vein is punctured with a puncture needle. At this point, the puncture aid may be removed. When the catheter is inserted into the internal jugular vein as described later after the puncture of the internal jugular vein is completed, the puncture aid may be removed at an appropriate time depending on the situation.

After the puncture needle is punctured in the internal jugular vein, a catheter is inserted through a route percutaneously secured from the skin into the internal jugular vein, and treatment or diagnosis is performed using the catheter. Catheter insertion is performed according to a standard method. For example, after inserting a guide wire into the internal jugular vein from the lumen of the puncture needle, the puncture needle is removed leaving the guide wire, and a dilator is inserted along the guide wire to expand the route. After removing the dilator leaving the guide wire, insert the catheter along the guide wire and remove the guide wire. After confirming that there is regurgitation of venous blood from the catheter, fill the lumen of the catheter with heparin saline and fix the base end of the catheter to the skin by a predetermined method, and the insertion and placement of the catheter are completed. Various treatments or diagnoses are performed using the indwelling catheter. By performing puncture using the puncture aid as described above, quick and accurate puncture is possible, so that the burden on the patient can be minimized and subsequent treatment and diagnosis using a catheter become possible. ..

9A, 9B, 10A, 10B: piercing aids; 1a, 1b, 1c, 2a, 2b, 3a, 3b, 4a, 4b, 4c, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b: body; 10, 27, 33, 38, 46, 58, 65, 72, 82: Regulatory section; 10a, 27a, 33a, 38a, 46a, 58a, 65a, 72a, 82a: Straight direction regulating section; 11, 12, 13, 21: Columnar body; 14, 15, 16, 22: Side surface portion; 17, 30, 42, 52, 52b, 52d, 77, 87: Support portion; 17a: Front surface; 17b: Back surface; 18, 51, 76, 86 : Recessed; 19, 20: Side surface; 23: Plate-shaped body; 24, 25, 26, 31, 32, 36, 37, 44, 45, 56, 57, 63, 64, 70, 71, 80, 81: Wall surface 25a: One end orthogonal to the traveling line direction of the wall surface 25; 25b: The other end orthogonal to the traveling line direction of the wall surface 25; 25c, 25d: The surface opposite to the wall surface 25; 25e: The traveling line direction of the wall surface 25 26a: One end orthogonal to the traveling line direction of the wall surface 26; 26b: The other end orthogonal to the traveling line direction of the wall surface 26; 26c, 26d: The surface opposite to the wall surface 26; 26e : Ends parallel to the running line direction of the wall surface 26; 28: Bottom; 29, 41, 41a, 55, 61: Bottom surface; 31a: Ends orthogonal to the running line direction of the wall surface 31; 31b: Of the wall surface 31 32a: Ends orthogonal to the running line direction of the wall surface 32; 32b: Parallel ends along the running line direction of the wall surface 32; 33b, 38b, 46b, 58b, 65b , 72b, 82b: Advancing angle regulating portion; 34, 39, 47, 59, 66, 73, 83: Inclined portion; 35, 40, 48, 60, 67, 74, 84: V-shaped cross section; 36a: Ends orthogonal to the running line direction of the wall surface 36; 36b: Ends parallel to the running line direction of the wall surface 36; 36c, 36d, 36e, 36f, 36g: Surface opposite to the wall surface 36; 37a: Wall surface Ends orthogonal to the running line direction of 37; 37b: Ends parallel to the running line direction of the wall surface 37; 37c, 37d, 37e, 37f, 37g: Surfaces opposite to the wall surface 37; 43, 49, 62, 69, 75, 85: Display surface; 43a, 49a, 62a, 69a, 75a, 85a: Display line; 44a: One end orthogonal to the traveling line direction of the wall surface 44; 44b: Traveling line direction of the wall surface 44 The other end orthogonal to; 44c: running of wall surface 44 Parallel ends along the row line direction; 44d, 44e: surface opposite to the wall surface 44; 45a: one end orthogonal to the traveling line direction of the wall surface 45; 45b: orthogonal to the traveling line direction of the wall surface 45 The other end; 45c: the end parallel to the traveling line direction of the wall surface 45; 45d, 45e: the surface opposite to the wall surface 45; 52a, 52c, 53, 53a: the protruding portion; 54, 54a, 78, 88, 100, 102, 103: Notch; 79, 89: Space; 90, 97, 101: Fixing means; 91, 95: Tape body; 92: Outer coating film; 93, 96: Skin side cover Cover: 94: single-sided tape; 98, 99, 99a: mark; 104: supraclavicular fossa triangle; 105, 107: internal jugular vein; 106: arrow indicating puncture direction; 108: common carotid artery; 109: running line Mark shown; 110: Mark indicating the planned puncture position of a blood vessel in the living body; 111: Ultrasonic probe; 112: Puncture needle; 113: Injection device; 114: Left hand; 115 Right hand; 116: Neck; α, β: Inclined part Angle of inclination with respect to the skin

Claims (17)

It is a puncture aid for percutaneously puncturing a blood vessel of a living body.
A puncture assisting tool including a main body having a regulating portion that regulates the traveling direction of the puncture needle with respect to a blood vessel, and a fixing means for fixing the main body to the skin of a living body. The puncture assisting tool according to claim 1, wherein the restricting portion has a straight-ahead direction regulating portion that regulates a straight-ahead direction of a puncture needle with respect to a traveling line direction of a blood vessel assumed on the skin surface. The straight-ahead direction regulating portion has a locking portion provided so as to abut and lock with the side surface of the puncture needle from both sides in a direction orthogonal to the traveling direction of the puncture needle, at least in a portion separated in the traveling line direction. The puncture aid according to claim 2. 3. The claim 3 in which the locking portion has at least one selected from a wall surface that is continuous along the traveling line direction, a wall surface that is discontinuous along the traveling line direction, and a columnar body that can make point contact with the puncture needle. The puncture aid described in. The puncture assisting tool according to claim 3 or 4, wherein the locking portion has wall surfaces that continuously face each other along the traveling line direction. The puncture aid according to claim 5, wherein the locking portion has a portion in which the distance between the facing wall surfaces becomes narrower as the locking portion approaches the skin side in a direction orthogonal to the traveling direction of the puncture needle. The puncture assisting tool according to any one of claims 1 to 6, wherein the regulating portion has a traveling angle regulating portion that regulates the traveling angle of the puncture needle with respect to the skin. The restricting portion has a locking portion provided so as to abut and lock with the side surface of the puncture needle from both sides in a direction orthogonal to the progress of the puncture needle, at least in a portion separated in the traveling line direction.
The advancing angle regulating portion is provided between the locking portions on the traveling line, and the advancing angle of the puncture needle with respect to the skin can be adjusted to a preset angle by contacting the puncture needle from the skin side and locking. The puncture aid according to claim 7, which is provided as possible. The puncture according to claim 8, wherein the advancing angle regulating portion has an inclined portion that continuously inclines so that the height from the skin surface decreases as the puncture position on the skin approaches the puncture position on the skin along the traveling line direction. Auxiliary tool. The puncture assisting tool according to claim 9, wherein the inclined portion has at least one shape selected from a straight line, a convex folding line, and a convex curve as a shape on the traveling line. In the fixing means, a joint portion that is detachably joined to the skin, a connecting portion that connects to the main body, and the joint portion are fixed to one surface, and the connecting portion is fixed to the surface on the opposite side. The puncture aid according to any one of claims 1 to 10, further comprising a sheet-shaped base material portion. The puncture aid according to any one of claims 1 to 11, wherein the main body has a support portion for supporting the regulation portion on a side close to the skin. The puncture aid according to claim 12, wherein the fixing means is fixed to at least a part of the support portion. The support portion has a plate-shaped portion extending toward the puncture position, and the plate-shaped portion is provided with a through hole or a notch portion through which a puncture needle can puncture the skin, according to claim 12 or 13. The described puncture aid. The main body or the fixing means is connected to an auxiliary sheet on which a mark indicating a puncture position of a blood vessel in a living body, a puncture position on the skin, or an installation position of an ultrasonic probe assisting the puncture is displayed. The puncture aid according to any one of 14. The puncture aid according to any one of claims 1 to 14, wherein a concave portion and / or a convex portion is formed on the outer surface of the main body except the skin side along the traveling line. The puncture assisting tool according to claim 9 or 10, wherein the shape of the inclined portion on the traveling line is also formed on the outside of the traveling angle regulating portion on the main body.

Images