JP3207860U - Needle guide - Google Patents

Abstract

To provide a needle guide that prevents a needle from being concentrated and punctured in one place of a blood vessel and suppresses damage to the blood vessel. The base member 3 is provided with at least two puncture guide holes 30 at a predetermined interval. The guide mechanism 4 is provided in the base member 3 so that a guide wall 41 surrounding the puncture guide hole 30 corresponding to the puncture guide hole 30 protrudes outward from the non-contact surface 32 to the opposite side of the contact surface 31. Since a plurality of puncture guide holes 30 are provided in one base member 3, it is possible to prevent needles from being concentrated and punctured in one place of the blood vessel 800, and to minimize the number of needle guides to be attached. It is possible to minimize the installation effort and cost. [Selection] Figure 1

Description

  The present invention relates to a needle guide for introducing and puncturing a needle into, for example, a shunt blood vessel.

  Conventionally, for the treatment of renal failure patients and maintenance of life, artificial dialysis has been performed in which blood taken from the patient's body is purified and returned to the body. In such blood purification treatment, a needle is punctured into a blood vessel in the body or a shunt blood vessel (hereinafter collectively referred to as a blood vessel) provided in the blood vessel, and blood is taken out from the blood vessel. A needle guide is used because it is difficult to confirm whether the needle accurately punctures a blood vessel. The needle guide is usually provided in the blood vessel near the body surface under the skin on both ends in the longitudinal direction of the blood vessel at a predetermined interval using two needle guides, and is embedded in the body surface together with the blood vessel, A needle is correctly guided through a blood vessel during artificial dialysis. When puncturing the needle, touch the skin of the body surface to confirm the position of the needle guide, pierce the corresponding needle guide with two cannulas or needles for blood extraction outside the body and blood introduction into the body, A blood vessel is punctured through a needle guide.

  The conventional needle guide frequently punctures a predetermined position of the blood vessel, so that the blood vessel is damaged. In addition, a measure to provide a plurality of needle guides outside the blood vessel so as to puncture a plurality of positions of the blood vessel is conceivable, but there is a problem that attachment takes time and cost.

  An object of the present invention is to provide a needle guide that solves the aforementioned problems of the known needle guide.

  In order to achieve the above object, a needle guide according to the present invention is used by being attached to the blood vessel so as to guide the puncture of the blood vessel of the needle, and the needle guide of the blood vessel along the longitudinal direction of the blood vessel is used. The contact surface is formed to be laid on the outer peripheral surface, and the contact surface on the blood vessel side, the non-contact surface opposite to the contact surface, and the contact at a predetermined interval in the longitudinal direction to puncture the needle A base member having at least two puncture guide holes provided through the surface and the non-contact surface, and a puncture direction in which the needle is inclined with respect to the base member and punctures the puncture guide hole And a guide mechanism having a guide wall provided so as to protrude from the base member around the puncture guide hole so as to define a guide hole including the guide hole.

  According to the present invention, since at least two puncture guide holes are provided at a predetermined interval in one needle guide, puncture is not concentrated on one place of the blood vessel, and the number of needle guides to be attached can be reduced. It can be minimized, and blood vessel damage can be suppressed.

It is a perspective view showing the 1st example of the needle guide concerning the present invention attached to the blood vessel. It is a longitudinal cross-sectional view which shows one usage example of the needle guide which concerns on the 1st Example attached to the blood vessel. It is the figure seen from the end (left side of FIG. 2) of the longitudinal direction of FIG. It is a perspective view which shows the 2nd Example of the needle guide which concerns on this invention attached to the blood vessel. The longitudinal cross-sectional view which shows one usage example of the needle guide which concerns on the 2nd Example attached to the blood vessel. It is a longitudinal cross-sectional view which shows the other usage example of the needle guide which concerns on a 2nd Example. It is a perspective view which shows the other application of the 2nd Example of the needle guide which concerns on this invention. It is a perspective view which shows the needle guide which concerns on the 3rd Example attached to the blood vessel. It is the figure seen from the one end (left side of FIG. 8) of the longitudinal direction of FIG. It is a figure which shows the state which canceled the mooring to the blood vessel of the fastening means in FIG.

  Hereinafter, several embodiments of the needle guide of the present invention will be described with reference to the drawings. In addition, about the component which has the same structure and function, the same number is attached | subjected and the description is abbreviate | omitted.

(First embodiment)
1 is a perspective view showing a first embodiment of a needle guide according to the present invention attached to a blood vessel, FIG. 2 is a longitudinal sectional view of the needle guide according to the first embodiment attached to a blood vessel, and FIG. 3 is a view as seen from one end in the longitudinal direction of FIG. The needle guide is used by being embedded under the skin near the body surface 801 and attached to the outer surface of the patient's blood vessel 800 so as to guide the puncture of the needle 900 into the blood vessel 800. The blood vessel 800 is a general blood vessel of a living body or a shunt blood vessel provided in the blood vessel. The first embodiment of the needle guide according to the present invention includes a base member 3 and a guide mechanism 4.

  The base member 3 is provided so as to be laid on the blood vessel 800 along the longitudinal direction of the blood vessel 800, for example. The base member 3 includes a sheet-like main body 33 formed by bending into an arc shape along the curved shape of the tube wall of the blood vessel 800. Have. The sheet-like main body 33 has a contact surface 31 that contacts the blood vessel 800 and a non-contact surface 32 on the body surface opposite to the contact surface 31. In this example, in order to puncture the needle 900, the sheet-like main body 33 has at least two, for example, three puncture guide holes 30 penetrating the contact surface 31 and the non-contact surface 32 at a predetermined interval along the longitudinal direction. Is provided.

  In addition, a fastening means 5 for connecting and positioning the needle guide with respect to the blood vessel 800 is further provided. In this example, the fastening means 5 is provided with a plurality of fixing holes 34 penetrating the contact surface 31 and the non-contact surface 32 at a predetermined interval in the peripheral portion of the sheet-like main body 33. The needle guide is sewn to the blood vessel 800 using a sewing thread 901 passed through the fixing hole 34.

  The guide mechanism 4 guides the needle 900 so as to be inserted into the predetermined puncture guide hole 30 at an angle, and the needle 900 punctures the other puncture guide hole 30 or a portion of the base member 3 that is not the puncture guide hole 30. 800 is provided so as not to puncture the other part of the 800 and so that the angle of the needle 900 with respect to the base member 3 does not become a right angle from an acute angle while the needle 900 punctures the blood vessel 800. The needle 900 is provided so as to protrude from the base member 3 around the puncture guide hole 30 so as to define a guide hole 40 including a puncture direction in which the needle 900 is inclined with respect to the base member 3 and punctures the puncture guide hole 30. A guide wall 41 is provided.

  In this example, the guide wall 41 is provided corresponding to each puncture guide hole 30. Specifically, the outer edge portions 414 and 414 on both sides in the circumferential direction, which is the direction around the puncture guide hole 30 in the guide wall 41, are configured integrally with the sheet-like main body 33 of the base member 3. The inner surface of the wall portion 415 between the outer edge portions 414 and 414 on both sides of the guide wall 41 on the puncture guide hole 30 side serves as a guide surface 413 that the needle 900 tilts into the puncture guide hole 30 to guide the needle 900. Thus, it is formed obliquely with respect to the non-contact surface 32 along the puncture direction, which is the direction of puncturing by inclining toward the puncture guide hole 30.

  Further, the wall portion 415 between the outer edge portions 414 and 414 on both sides of the guide wall 41 expands in diameter toward the extraction direction, which is the direction in which the needle 900 punctured in the guide hole 40 is detached from the blood vessel 800. It is curved so as to be defined in a trumpet shape. As shown in FIG. 3, the guide surface 413 is formed in a curved shape that is rounded when viewed from one end in the longitudinal direction (left side in FIG. 2). The outer edge portions 414 and 414 on both sides and the non-contact surface 32 integrated with the outer edge portion 414 define a guide hole 40 in which the needle 900 is inclined and penetrates the blood vessel 800 through the puncture guide hole 30. It has become so.

  The base member 3 and the guide mechanism 4 are made of the same material as an example.

  In this example, three puncture guide holes 30 and three guide walls 41 are provided in one sheet-like main body 33. However, the number is not limited to this, and may be two, or three or more. It may be.

  When the needle guide according to the first embodiment is used, for example, when blood purification treatment is performed on a patient with renal failure, two cannulas for blood extraction outside the body and blood introduction into the body are provided at different locations in the blood vessel. A plurality of needle guides may be used so as to be attached to the blood vessel for guiding blood to the outside of the body and the blood vessel for introducing blood to the body, respectively. One needle guide may be attached and used so that the area and the area for blood introduction into the body are selected and punctured into the puncture guide holes 30 spaced at predetermined intervals.

  Next, the use and operation of the needle guide according to the present invention configured as described above will be described as follows.

  When the needle guide is attached, the contact surface 31 comes into contact with the outer surface of the blood vessel 800, and the base member 3 is sewn and fixed to the blood vessel 800 by passing, for example, a sewing thread 901 as the fastening means 5 through the fixing hole 34. A blood vessel is buried under the skin near the patient's body surface 801 together with the needle guide. When the needle guide is attached to the outside of the blood vessel, for example, when blood purification treatment is performed on a patient with renal failure, the position of the guide wall 41 protruding from the base member 3 while touching the skin of the patient's body surface 801 is adjusted. Check. Two cannulas or needles 900 for guiding blood to the outside of the body and introducing blood into the body are guided by the corresponding guide walls 41 and surrounded by the guide walls 41 while being inserted into the corresponding guide holes 40. The blood vessel 800 is punctured through the puncture guide hole 30.

  In the needle guide according to the present invention, since a plurality of puncture guide holes 30 are provided at a predetermined interval in one base member 3, the needle 900 is not punctured in one place on the blood vessel 800. Another puncture guide hole 30 can be selected by recording the number of times of use of the previous puncture place. Thus, damage to the blood vessel 800 can be suppressed. In addition, since a plurality of puncture guide holes 30 are provided in one base member 3, the number of needle guides to be attached can be minimized, and installation effort and cost can be minimized.

(Second embodiment)
FIG. 4 is a perspective view showing a second embodiment of the needle guide according to the present invention attached to a blood vessel, and FIG. 5 is an example of one use of the needle guide according to the second embodiment attached to the blood vessel. FIG. 6 is a longitudinal sectional view showing another example of use of the needle guide according to the second embodiment.

  In this embodiment, the puncture guide hole group 300 including a plurality of, for example, two puncture guide holes 30 separated by a predetermined interval is used as a non-contact surface of the base member 3 so as to increase the choices of the puncture guide holes 30. The guide wall 41 is provided so as to protrude from 32.

  Each of the guide walls 41 has a substantially hollow cylindrical shape so as to define a guide hole 40 surrounding each puncture guide hole group 300 and spatially communicating with the puncture guide holes 30, 30. Further, in the guide wall 41, the convex portion 42 extends from the non-contact surface 32 in order to separate the openings in the non-contact surfaces 32 of the puncture guide holes 30 and 30 and guide the needle 900 to the predetermined puncture guide hole 30. Protrusively provided.

  The guide wall 41 has an inner surface on the side of the puncture guide hole 30 as a guide surface 413 that guides the needle 900 so that the needle 900 is not straight but inclined to the puncture guide hole 30. The diameter-reduced wall portion 411 extended so as to decrease in diameter as it moves away from the opening side of the 30 and the diameter-reduced wall portion 411 so that the needle 900 inserted into the guide hole 40 leans on the opening side of the guide hole 40. And a diameter-expanding wall portion 412 that is continuously extended from the extending end toward the opening side of the guide hole 40.

  The convex portion 42 is formed in a triangular prism shape that narrows from the non-contact surface 32 toward the opening side of the guide hole 40 and has a triangular cross section in the longitudinal direction, and the surface of the convex portion 42 on the opening side of the guide hole 40. Corresponds to each of the puncture guide holes 30 surrounded by one guide wall 41, and two inclined surfaces that are inclined to each other so as to insert and guide the needle 900 inserted into the guide hole 40 into the puncture guide hole 30. 421 is formed. The guide hole 40 is partitioned by the convex portion 42 so that two passages 401 communicating with the corresponding puncture guide hole 30 are formed by the inclined surface 421 of the convex portion 42 and the inner surface of the reduced diameter wall portion 411.

  The needle guide according to the second embodiment configured as described above has the same effect as that of the first embodiment. Further, since one guide wall 41 is provided so as to surround the puncture guide hole group 300, more puncture guide holes 30 can be arranged in the limited space than in the first embodiment. According to the needle guide according to the second embodiment, since more puncture guide holes 30 are formed, there are more options for puncture locations. Therefore, damage to blood vessels can be suppressed to a lower level. Further, when the needle 900 is inserted into a predetermined puncture guide hole 30, it is guided by the corresponding guide surface 413 and the corresponding inclined surface 421, but is not inserted into the other puncture guide hole 30, and the corresponding passage 401. Since the blood vessel 800 can be punctured through the corresponding puncture guide hole 30, the puncture operation of the needle 900 can be performed more stably and reliably. In addition, since it is possible to maximize the interval for separately puncturing the needle 900 for guiding blood to the outside of the body and for introducing blood into the body, the space for attaching the needle guide of the blood vessel 800 can be minimized. it can.

  The puncture guide hole group 300 includes at least two puncture guide holes 30 so that puncture is not concentrated on one place of the blood vessel, and the number of needle guides to be attached is minimized. In addition, blood vessel damage can be suppressed. In this example, three guide walls 41 are provided so as to surround the three puncture guide hole groups 300, but the present invention is not limited to this.

  FIG. 7 is a perspective view showing another application of the second embodiment of the needle guide according to the present invention. In this example, the base member 3 is formed with one puncture guide hole group 300 including a plurality of, for example, two puncture guide holes 30 provided so as to be arranged in the longitudinal direction at a predetermined interval. The guide mechanism 4 surrounds one puncture guide hole group 300 by one guide wall 41. The puncture guide holes 30 and 30 are arranged at a predetermined interval so as to be partitioned by the convex portion 42.

  In this way, the interval between the puncture guide hole 30 on one end side in the longitudinal direction and the puncture guide hole 30 on the other end side in the longitudinal direction is punctured separately for the needle 900 for guiding blood to the outside of the body and for introducing blood into the body. By using it as an interval for doing so, the number of needle guides used can be reduced.

  Therefore, even with the needle guide according to this example, it is possible to minimize the number of needle guides to be attached without concentrating and puncturing at one place on the blood vessel, and to suppress damage to the blood vessel. Have the same effect as the above example.

(Third embodiment)
8 is a perspective view showing a needle guide according to a third embodiment attached to a blood vessel, FIG. 9 is a view seen from one end (left side of the drawing) in FIG. 8, and FIG. It is a figure which shows the state which canceled the mooring to the blood vessel of a fastening means. In this embodiment, in order to localize the needle guide to a predetermined position without moving with respect to the blood vessel 800, for example, in addition to the configuration of the first embodiment, a fastening means 5 is further provided. The fastening means may be configured in addition to the configuration of the second embodiment.

  In this embodiment, the fastening means 5 includes two fastening members 51, 51 to which the needle guide is detachably connected to the blood vessel 800 when the needle guide is attached to the blood vessel 800. The anchoring members 51, 51 are bent in an arc shape so as to be formed in a sleeve shape surrounding the blood vessel 800 together with the base member 3 of the needle guide in order to stably and reliably localize the needle guide to the blood vessel 800. Has been.

  The two side portions 35 parallel to the longitudinal direction of the peripheral portion of the sheet-like main body 33 of the base member 3 and the side portion 53 facing the side portion 35 of the engaging member 51 of the fastening means 5 can be engaged with each other. Are formed in an uneven shape. Each of the side portions 35 of the base member 3 is provided with a hinge member as a pivotally supporting portion for rotatably connecting the anchoring member 51, and the side portion 53 of the anchoring member 51 is connected to the pivotal portion of the base member 3. It is a pivoting part that is pivotally connected. Opposite side portions 52, 52 opposite to the side portion 53 of the anchoring member 51 are opposed to the opposite side portion 52 so as to be engaged with each other so as to be able to be engaged and disengaged. The engaging rib 521 is provided with an engaging groove 522 on the other side 52.

  The needle guide according to the present invention can be stably attached to the blood vessel 800 when the anchoring members 51, 51 are rotated opposite to each other and engaged. The fastening means 5 configured in this way may be provided with a plurality of fixing holes 34 as in the first embodiment or the second embodiment. It can be omitted. In addition, in order to make localization more reliably, the fixing holes 34 may be appropriately provided at both ends of the engaging member 51 in the longitudinal direction, and the engaging member 51 may be connected to the blood vessel 800 by the sewing thread 901.

  Further, in the puncturing operation of the needle 900, when it is felt that the needle 900 hits a hard object, it means that the needle tip of the needle 900 penetrates the blood vessel 800 and hits the anchoring member 51. At this time, if the user pulls back the needle 900 immediately, it is possible to avoid the needle 900 completely penetrating the blood vessel 800 and leaking a lot of blood. Therefore, use safety can be improved.

  In the needle guide according to the present invention, since the plurality of guide mechanisms 4 are provided on one base member 3, the number of needle guides attached to the blood vessel 800 can be reduced to the minimum, and the installation effort and cost can be minimized. Can be suppressed. In addition, since a plurality of puncture guide holes 30 are provided in one base member 3, the needle 900 is not concentrated and punctured in one place of the blood vessel 800, and damage to the blood vessel 800 is suppressed and can be used for a long time. become. Further, the puncture operation of the needle can be performed more stably and reliably by the convex portion 42 in which the guide surface 413 or / and the inclined surface 421 of the guide wall 41 is formed as in the second embodiment. It is possible to improve the performance.

  As described above, the needle guide according to the present invention has described some preferred embodiments, but the present invention is not limited to this, and it goes without saying that various changes can be made without departing from the scope of the present invention. . In the second embodiment, the example in which the two puncture guide holes 30 and the convex portion 42 that separates the two puncture guide holes 30 are provided in one guide wall 41 has been described. In the third embodiment, two puncture guide holes 30 and convex portions 42 separating the two puncture guide holes 30 may be provided. In addition, although the example which opened the 1 or 2 puncture guide hole 30 like the Example was demonstrated in the one guide wall 41, you may provide three or three or more as needed. Needless to say. Further, the same number of inclined surfaces 421 may be formed in the convex portion 42 corresponding to the number of the puncture guide holes 30. Further, by providing the fastening means 5 having the fastening members 51, 51 that are turned opposite to the base member 3 to be engaged and disengaged, the fixing hole 34 is drilled and the sewing thread 901 is used. It is possible to save the time and effort of attaching the needle guide to the blood vessel 800.

  The needle guide according to the present invention is useful for guiding the puncture of a needle or cannula into a blood vessel in the body or a shunt blood vessel provided in the blood vessel.

3 Base member 30 Puncture guide hole 300 Puncture guide hole group 31 Contact surface 32 Non-contact surface 33 Sheet-like main body 34 Fixing hole 35 Side side portion 4 Guide mechanism 40 Guide hole 401 Channel 41 Guide wall 411 Reduced diameter wall portion 412 Expanded wall 413 Guide surface 414 Outer edge 415 Wall 42 Convex 421 Inclined surface 5 Fastening means 51 Locking member 52 Opposite side 521 Locking rib 522 Locking groove 53 Side 800 800 Blood vessel 801 Body surface 900 Needle 901 Sewing thread

Claims (12)

It is used by attaching to the blood vessel so as to guide the puncture of the needle into the blood vessel,
It is formed so as to be laid on the outer peripheral surface of the blood vessel along the longitudinal direction of the blood vessel, the contact surface on the blood vessel side, the non-contact surface opposite to the contact surface, and the needle for puncturing the needle A base member having at least two puncture guide holes provided through the contact surface and the non-contact surface at a predetermined interval in the longitudinal direction;
A guide wall provided so as to protrude from the base member around the puncture guide hole so as to define a guide hole including a puncture direction in which the needle is inclined with respect to the base member and punctures the puncture guide hole A guide mechanism,
A needle guide characterized by comprising:   An inner surface of the guide wall on the puncture guide hole side is formed obliquely with respect to the non-contact surface along the puncture direction as a guide surface that the needle is inclined to puncture the puncture guide hole. The needle guide according to claim 1.   The needle guide according to claim 1, wherein the guide wall is provided corresponding to each puncture guide hole. Outer edge portions on both sides in the circumferential direction that are directions around the puncture guide hole in the guide wall are configured integrally with the base member,
The wall portion between the outer edge portions of the guide wall is curved so that the guide hole is enlarged in diameter outwardly in the puncture direction and defined in a trumpet shape. 4. The needle guide according to claim 3, wherein   The puncture guide hole group including at least two of the puncture guide holes, each surrounded by the guide wall and spaced apart from each other by a predetermined distance, is provided in the base member. The needle guide according to 1 or 2.   6. The guide mechanism according to claim 5, further comprising: a protrusion that separates an opening in each non-contact surface of each of the puncture guide holes in the puncture guide hole group so as to protrude from the non-contact surface. The needle guide described in 1. The surface of the convex portion on the opening side of the guide hole corresponds to each of the puncture guide holes in the puncture guide hole group, and guides the needle inserted into the guide hole to the corresponding puncture guide hole. As shown in FIG.
The needle guide according to claim 6, wherein the guide hole is partitioned so that a passage communicating with the corresponding puncture guide hole is formed by the inclined surface of the convex portion. The guide wall extends so as to reduce in diameter as it moves away from the opening side of the puncture guide hole, and a reduced diameter wall portion that forms the passage together with the inclined surface, and the needle inserted into the guide hole includes A diameter-enlarged wall portion extending so as to continuously expand from the extending end of the reduced-diameter wall portion toward the opening side of the guide hole so as to lean on the opening side of the guide hole;
The said guide hole is partitioned off by the said convex part so that the said channel | path connected to the said puncture guide hole corresponding by the said inclined surface and the said reduced diameter wall part may be formed. The needle guide described in 1.   The needle guide according to any one of claims 1 to 8, further comprising fastening means for connecting and positioning the needle guide with respect to the blood vessel.   The fastening means includes two fastening members provided so that the needle guide surrounds the blood vessel when the needle guide is attached to the blood vessel so that the needle guide is detachably connected so that the needle guide does not fall off the blood vessel. The needle guide according to claim 9, comprising: Two side portions parallel to the longitudinal direction in the peripheral portion of the base member are configured as pivot portions that support and connect each of the engaging members so as to be relatively rotatable,
The side part opposite to the side part of the anchoring member is configured as a pivot part that is rotatably connected to the pivot part of the base member,
On the opposite side of each of the fastening members, the opposite side of the side opposite to the side of the side is provided with an engaging rib on one side of the opposite side so that it can be pivoted to engage and disengage. The needle guide according to claim 10, wherein an engaging groove is provided in each of the other opposite side portions. The fastening means is provided with a plurality of fixing holes penetrating the contact surface and the non-contact surface at a predetermined interval in a peripheral portion of the base member,
The needle guide according to any one of claims 9 to 11, wherein the needle guide is sewn to the blood vessel via a sewing thread passed through the fixing hole.

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