JP2019198552A - Indwelling needle device - Google Patents

Abstract

To enhance safety by suppressing a reduction in a blood amount in the body by preventing air from being mixed in a flow passage while reducing the amount of flashback of blood into a catheter hub member, and to reduce an onset risk of infectious diseases by shortening time when the flow passage is opened.SOLUTION: In a connector component 4, an insertion part 41 inserted into a hub inner flow passage 21a of a catheter hub member 21 is formed. A connector inner flow passage 4a formed in the connector component 4 is opened in a distal end part of the insertion part 41 in an insertion direction. The connector inner flow passage communicates an extension tube 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an indwelling needle device used, for example, when performing infusion therapy.

  When performing treatment such as infusion therapy, blood transfusion, extracorporeal circulation, etc., the patient's blood vessel is left in a state of being punctured. In recent years, there has been a tendency to use an indwelling needle having a catheter made of a soft member for the purpose of reducing damage to a blood vessel during indwelling.

  A general indwelling needle device has an indwelling part composed of a hub member for connecting an extension tube, a soft catheter to be placed in a blood vessel, and a sharp part that is inserted into the catheter and protrudes from the distal end of the catheter. And a gripping part made up of parts for holding the metal needle.

  At the time of use, the operator first holds the gripping component and punctures the blood vessel with a metal needle and a catheter. It can be confirmed by visually recognizing the backflow of blood in the indwelling part that the metal needle has been punctured into the blood vessel. This phenomenon is generally called “flashback”. After confirming the flashback, insert the metal needle and catheter slightly more. This is to ensure that the catheter is inserted into the blood vessel.

  In this way, the catheter is inserted into the blood vessel by pushing the indwelling part to the desired position. Since the metal needle is an auxiliary part for inserting the catheter into the blood vessel, after inserting the catheter into the blood vessel, the metal needle is withdrawn from the catheter while the catheter is left in the blood vessel, and the hub member is placed on the patient's epidermis. Fix it. At this time, it is confirmed by backflow (flashback) of blood into the catheter that the catheter is indwelled in the blood vessel. Then, for example, the extension tube primed by filling with physiological saline is connected to the hub member. When this extension tube is connected to the hub member, the hub member is filled with blood so that air is not mixed into the flow path, and after the air in the flow path has been released, fixing is performed with a lock nut. In this way, infusion therapy can be started.

  After the catheter is placed in the blood vessel, the hub member and the extension tube are attached to the skin using a sealing dressing material to fix the connection between the hub member and the extension tube and to prevent bacteria from entering the puncture part of the skin. Cover with the puncture site. The extension tube is fixed to the epidermis in a state of 2-3 rolls. This is because when the infusion line upstream of the extension tube is caught on the bed fence or when the infusion line is intentionally removed, the pulling force applied to the puncture portion of the skin by the extension tube is reduced to prevent the catheter from coming off. It is for suppressing.

  When using an indwelling needle device, the above-described procedures related to puncturing, indwelling, and fixing are generally performed.

JP 2006-296797 A JP 2014-136115 A JP, 2006-182188, A JP 2017-153658 A

  By the way, when connecting the extension tube to the hub member, the hub member is filled with blood so that air is not mixed in the flow path. However, there are few patients with low blood volume, especially low birth weight infants. Even reverse blood is greatly affected by a decrease in blood volume in the body, and there is a demand for reducing the reverse blood volume as much as possible. Moreover, since the low birth weight infant has low blood pressure, it takes time to fill the hub member with blood by flashback. While waiting for the filling of blood, since the flow path is an open system, there is a problem that there is a high possibility that bacteria in the atmosphere enter the blood. Furthermore, since low birth weight infants have low immunity and a high risk of causing infections, there is also a demand to shorten the time during which the flow path is opened as much as possible.

  Therefore, it is conceivable to prepare a syringe filled with physiological saline and increase the bulk by administering physiological saline into the hub member with the syringe. However, the procedure increases and the cost also increases. I want to fill the hub with the patient's blood.

  The present invention has been made in view of such points, and an object of the present invention is to prevent air from being mixed into the flow path while reducing the reverse flow rate of blood into the hub member. In addition to reducing the blood volume drop in the body and improving the safety during treatment, the time during which the flow path is opened is shortened to further reduce the risk of developing an infectious disease.

  In order to achieve the above object, in the present invention, by inserting a part of the connector part into the flow path of the catheter hub member, the amount of blood filled in the flow path can be reduced.

  A first invention includes an indwelling component having a catheter to be placed in a blood vessel, a catheter hub member attached to the catheter and having a flow path in the hub communicating with the proximal end of the catheter, and an extension tube And an indwelling needle device provided with the extension tube and a connector part for connecting the extension tube to the catheter hub member, wherein the connector part is inserted into the flow path in the hub, The connector has an in-connector flow path that is open at the distal end in the insertion direction of the insertion portion and communicates with the extension tube.

  According to this configuration, when the catheter is placed in the blood vessel by a conventional technique, the blood in the blood vessel flows backward in the catheter and flows into the flow path in the hub. When connecting the extension tube to the catheter hub member, the insertion part of the connector part is inserted into the flow path in the hub. When the insertion portion is inserted into the in-hub passage, the volume of the in-hub passage is reduced by the volume of the insertion portion. Therefore, even if the amount of blood flowing back to the hub internal flow path is small, the hub internal flow path is filled with blood and air mixing is suppressed, so that the blood filling amount can be small. Therefore, especially in the case of a low birth weight infant who is a patient with low blood volume, the decrease in blood volume in the body is suppressed, and the time for filling the flow path in the hub with the blood is shortened. Further reduction.

  According to a second aspect of the invention, the connector component includes a connector main body portion to which the extension tube is attached, the insertion portion is formed in a cylindrical shape protruding from the connector main body portion, and the flow path in the connector is the insertion portion. It is formed inside the part.

  According to this configuration, since the insertion portion has a cylindrical shape, the connection with the in-hub flow path is reliably performed.

  According to a third aspect of the present invention, the catheter hub member is provided with a hub member side engaging portion that engages with the connector main body portion.

  According to this configuration, since the hub member side engaging portion of the catheter hub member is engaged with the connector main body portion in a state where the extension tube is connected to the catheter hub member, the connector component is not easily detached from the catheter hub member.

  According to a fourth aspect of the present invention, the hub member side engaging portion of the catheter hub member includes a first hub member side engaging portion and a second hub member side engaging portion arranged so as to sandwich the connector main body portion. The first hub member side engaging portion and the second hub member side engaging portion are engaged from the opposite side of the connector main body portion on which the insertion portion is formed. .

  According to this configuration, the first hub member side engaging portion and the second hub member side engaging portion sandwich the connector main body portion so that the connector part and the catheter hub member are integrated so as not to rattle. Is done. Since the first hub member side engaging portion and the second hub member side engaging portion are engaged from the side opposite to the side where the insertion portion is formed in the connector main body portion, the insertion portion is removed from the flow path in the hub. It becomes difficult.

  According to a fifth aspect of the present invention, a first convex portion and a second convex portion are formed in the first hub member side engaging portion and the second hub member side engaging portion, respectively. 1st recessed part and 2nd recessed part formed so that 1 convex part and the said 2nd convex part may each fit are formed, It is characterized by the above-mentioned.

  According to this configuration, when the extension tube is connected to the catheter hub member, the first convex portion and the second convex portion of the catheter hub member are respectively fitted into the first concave portion and the second concave portion of the connector main body portion. It becomes even more difficult to escape from the in-hub flow path.

  The sixth invention is characterized in that the connector main body portion is provided with a connector side engaging portion that engages with the catheter hub member.

  According to this configuration, since the connector side engaging portion of the connector part is engaged with the catheter hub member in a state where the extension tube is connected to the catheter hub member, the connector part is not easily detached from the catheter hub member.

  In a seventh aspect of the present invention, the connector-side engaging portion of the connector main body has a first connector-side engaging portion and a second connector-side engaging portion that are arranged so as to sandwich the catheter hub member. It is characterized by.

  According to this configuration, the first connector side engaging portion and the second connector side engaging portion sandwich the catheter hub member, so that the connector component and the catheter hub member are integrated so as not to rattle. .

  According to an eighth aspect of the present invention, there is provided an elastic material between an opening peripheral edge of the in-connector channel at the distal end of the connector part in the insertion direction and an inner surface of the in-hub channel of the catheter hub member. The sealing material which consists of is provided so that it may contact this opening peripheral part and this inner surface.

  According to this configuration, the gap between the insertion direction distal end portion of the insertion portion and the inner surface of the in-hub flow path of the connector component is sealed by the sealing material.

  The ninth invention is characterized in that an insertion tube portion to be inserted into the insertion portion of the connector part is provided on the inner surface of the flow path in the hub of the catheter hub member.

  In a tenth aspect of the invention, the catheter hub member has a flat shape that is long in the radial direction of the extension tube, and the connector main body portion protrudes in the protruding direction of the insertion portion so as to correspond to the flat shape of the catheter hub member. It is characterized by having a flat shape that is long in the direction that intersects with.

  According to the first invention, the connector part for connecting the extension tube to the catheter hub member is formed with the insertion portion to be inserted into the flow path in the hub, and is opened and extended at the distal end portion in the insertion direction of the insertion portion. Since the flow path in the connector communicating with the tube is formed, it is possible to prevent air from entering the flow path while reducing the reverse flow rate of blood. Thereby, while being able to reduce the blood volume fall in a body and improving safety | security, the time when the flow path is open | released can be shortened and the onset risk of an infectious disease can be reduced further.

  According to the second invention, since the insertion portion has a cylindrical shape protruding from the connector main body portion, the connection with the in-hub flow path can be reliably performed.

  According to the third aspect, since the engaging portion that engages with the connector main body portion is provided in the catheter hub member, it is possible to prevent the connector component from being detached from the catheter hub member.

  According to the fourth invention, the first hub member side engaging portion and the second hub member side engaging portion sandwich the connector main body portion so that the connector component and the catheter hub member do not rattle. Furthermore, the first hub member side engaging portion and the second hub member side engaging portion are engaged from the side opposite to the side where the insertion portion is formed in the connector main body portion. Can be prevented from escaping from the flow path in the hub.

  According to the fifth aspect of the present invention, since the first convex portion and the second convex portion of the catheter hub member are fitted in the first concave portion and the second concave portion of the connector main body portion, respectively, with the extension tube connected to the catheter hub member. The insertion portion can be further prevented from coming out of the in-hub flow path.

  According to the sixth aspect of the present invention, since the engaging part that engages with the catheter hub member is provided in the connector part, the connector part can be prevented from being detached from the catheter hub member.

  According to the seventh aspect, the first connector side engaging portion and the second connector side engaging portion sandwich the catheter hub member so that the connector part and the catheter hub member are integrated so as not to rattle. be able to.

  According to the eighth aspect, since the sealing material made of an elastic material is provided between the insertion direction distal end of the insertion portion and the inner surface of the in-hub flow path of the catheter hub member, the sealing performance can be improved.

  According to the ninth aspect of the present invention, the insertion tube portion formed on the inner surface of the in-hub flow path of the catheter hub member is inserted into the insertion portion of the connector component, so that the sealing property between the catheter hub member and the connector component is obtained. Can be further increased.

It is a perspective view which shows the indwelling component of the indwelling needle apparatus which concerns on Embodiment 1 of this invention, an extension tube, and a connector component. FIG. 2 is a view corresponding to FIG. 1 showing a state where the connector part is removed from the catheter hub member. It is the III-III sectional view taken on the line in FIG. It is the IV-IV sectional view taken on the line in FIG. It is the perspective view which looked at the catheter hub member from the base end side. It is the perspective view which looked at the connector components from the front end side. It is a perspective view which shows the state in which the catheter hub member was attached to the holding | grip component. It is a top view which shows the state in which the catheter hub member was attached to the holding | grip component. It is a side view which shows the state in which the catheter hub member was attached to the holding | grip component. It is the XX sectional view taken on the line in FIG. It is the XI-XI sectional view taken on the line in FIG. FIG. 8 is a view corresponding to FIG. 7 showing a state after the needle is removed. FIG. 12 is a view corresponding to FIG. 11 showing a state after the needle is removed. FIG. 8 is a view corresponding to FIG. 7 showing a state where the catheter hub member is detached from the gripping component. FIG. 12 is a view corresponding to FIG. 11 showing a state where the catheter hub member is detached from the gripping component. FIG. 4 is a view corresponding to FIG. 3 according to Embodiment 2 of the present invention. It is FIG. 3 equivalent view which concerns on Embodiment 3 of this invention. FIG. 6 is a view corresponding to FIG. 1 according to Embodiment 4 of the present invention. FIG. 6 is a view corresponding to FIG. 2 according to Embodiment 4 of the present invention. It is a top view of the connector component which concerns on Embodiment 4 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 is a perspective view showing an indwelling needle device 1 according to Embodiment 1 of the present invention. The indwelling needle device 1 is used when an indwelling catheter 20 is placed in a patient's blood vessel when performing various treatments such as infusion therapy, blood transfusion, and extracorporeal circulation. It is possible to inject a drug solution or the like into the patient's body via the indwelling catheter 20 or to measure the patient's blood pressure. Since various medical treatments using the indwelling catheter 20 have been performed conventionally, detailed description is omitted.

(Configuration of indwelling needle device 1)
The indwelling needle device 1 includes an indwelling part 2 shown in FIGS. 1 and 2, an extension tube 3, a connector part 4, a female connector 5, a metal needle 6 shown in FIGS. 7 to 11 and a needle base member 7. And a gripping component 8. The female connector 5 shown in FIGS. 1 and 2 is a cylindrical member having a conventionally known luer taper. Although not shown, the male connector and the female connector 5 are connected by inserting a male connector and screwing a lock nut. It can be connected.

  The female connector 5 and the male connector are sized in accordance with standards defined by ISO (International Organization for Standardization) and JIS (Japanese Industrial Standards). For example, an end portion of an infusion tube included in an infusion set (not shown) is connected to the male connector. The infusion set is composed of a drug solution bag containing a drug solution to be administered to a patient, an infusion tube extending from the drug solution bag, and the like.

  As shown in FIG. 1, infusion therapy is possible by the indwelling component 2, the extension tube 3, the connector component 4, and the female connector 5. During the infusion therapy, the metal needles shown in FIGS. 6, the needle base member 7 and the gripping component 8 are unnecessary. On the other hand, from the puncture technique to the indwelling technique, the metal needle 6 shown in FIGS. 7 to 11 and the like, the needle base member 7 and the gripping part 8 are necessary. However, the extension tube 3 shown in FIGS. The connector part 4 and the female connector 5 are removed. The indwelling needle device 1 may be constituted by an indwelling part 2, an extension tube 3 and a connector part 4, or may be constituted by an indwelling part 2, an extension tube 3, a connector part 4 and a female connector 5.

  In the description of this embodiment, as shown in each figure, the puncture direction (insertion direction into the blood vessel) during the puncture procedure is defined as the distal end side, and the opposite side is defined as the proximal end side. It is for convenience only and does not specify the direction of assembly or transportation. Further, the center line direction of the indwelling catheter 20 substantially coincides with the puncture direction during the puncture procedure.

(Configuration of indwelling part 2)
As shown in FIGS. 3 and 4, the indwelling component 2 includes an indwelling catheter 20 placed in a blood vessel, and a flow path in the hub that is attached to the indwelling catheter 20 and communicates with a proximal end portion of the indwelling catheter 20. And a catheter hub member 21 formed with 21a. The indwelling catheter 20 is made of a flexible material (soft material) and has a characteristic that it can be bent without damaging the inner wall in the blood vessel. Although the material which comprises this indwelling catheter 20 is not specifically limited, A conventionally well-known material can be used. The length of the indwelling catheter 20 is set so that the proximal end portion protrudes from the skin puncture portion in a state where at least the distal end portion of the indwelling catheter 20 is placed in the blood vessel of the patient. The distal end portion of the indwelling catheter 20 is formed to have a tapered shape. In this embodiment, since it is a catheter placed in a patient's blood vessel, it is called an indwelling catheter 20, but it can also be called simply a catheter or an indwelling needle.

  The catheter hub member 21 is formed of a hard member made of a material harder than the material forming the indwelling catheter 20. The catheter hub member 21 is formed to be smaller than the standard female connector 5 and is characterized by being smaller than a case where the catheter hub member 21 is designed according to the standard of ISO or JIS.

  Specifically, the dimension of the catheter hub member 21 in the center line direction of the indwelling catheter 20 (puncture direction during the puncture procedure) is set shorter than the dimension of the female connector 5 in the center line direction. Further, the dimension of the catheter hub member 21 in the direction intersecting with the center line direction of the indwelling catheter 20 is set shorter than the radial dimension (outer diameter) of the female connector 5, and is larger than the maximum outer diameter of the female connector 5. In addition, the maximum dimension of the catheter hub member 21 in the direction intersecting the center line direction of the indwelling catheter 20 is shortened. The catheter hub member 21 has a flat shape that is long in the radial direction of the extension tube 3, and the horizontal dimension A1 of the catheter hub member 21 shown in FIG. 5 is greater than the vertical dimension A2 of the catheter hub member 21. Is also set short. The height direction of the catheter hub member 21 is a direction that protrudes from the skin surface when fixed to the skin, and the left-right direction of the catheter hub member 21 is a direction along the skin surface.

  Since each dimension is set as described above, the catheter hub member 21 is reduced in size. For example, when the projection area in plan view is compared between the catheter hub member 21 and the female connector 5 with the catheter hub member 21 and the female connector 5 fixed to the skin as a reference, the catheter hub member 21 becomes smaller. Yes.

  On the distal end side of the catheter hub member 21, a cylindrical distal end tubular portion 21b is formed so as to protrude in the puncture direction during the puncture procedure. The distal end tube portion 21 b is located at the center portion in the left-right direction of the catheter hub member 21 and at the center portion in the height direction of the catheter hub member 21. The dimension in the height direction of the catheter hub member 21 is shortened toward the distal end tube portion 21b side, and the contact surface with the skin in the catheter hub member 21 is curved.

  As shown in FIGS. 3 and 4, the proximal end portion of the indwelling catheter 20 is inserted over a predetermined length inside the distal end tubular portion 21 b of the catheter hub member 21, and the outer periphery of the proximal end portion of the indwelling catheter 20 The surface is fixed in a liquid-tight state to the inner peripheral surface of the distal end cylindrical portion 21b. The proximal end portion of the indwelling catheter 20 reaches the inside of the catheter hub member 21 rather than the distal end tubular portion 21b.

  Inside the catheter hub member 21, the in-hub flow path 21 a is formed. One end portion (front end portion) of the in-hub flow path 21 a communicates with the proximal end portion of the indwelling catheter 20. The other end portion of the in-hub flow path 21 a is open at the center in the left-right direction of the catheter hub member 21 on the proximal end surface of the catheter hub member 21. A throttle portion 21c is provided at the tip of the in-hub flow path 21a. The inner diameter of the in-hub flow path 21 a other than the throttle portion 21 c is set larger than the inner diameter of the indwelling catheter 20. Further, the inner diameter of the narrowed portion 21c of the in-hub channel 21a is set slightly smaller than the inner diameter of the indwelling catheter 20.

  As shown in FIG. 5, the catheter hub member 21 includes a plate-like first hub member side engaging portion 22 and a second hub member side engaging portion 23 that are engaged with a connector main body portion 40 of the connector component 4 described later. Is provided. The first hub member side engaging portion 22 and the second hub member side engaging portion 23 are arranged so as to face each other with a space therebetween, and the first hub member side engaging portion 22 and the second hub member side Between the engaging portion 23, the opening of the in-hub flow path 21a is located. Further, the first hub member side engaging portion 22 and the second hub member side engaging portion 23 are arranged so as to sandwich the connector main body portion 40. The first hub member side engaging portion 22 and the second hub member side engaging portion 23 are engaged with the connector main body portion 40 so as to be engaged from the side opposite to the side where the insertion portion 41 is formed in the connector main body portion 40 described later. It extends to the surface of the base end side. A first convex portion 22 a that protrudes toward the second hub member side engaging portion 23 is formed at the end of the first hub member side engaging portion 22. A second convex portion 23 a that protrudes toward the first hub member side engaging portion 22 is formed at the end of the second hub member side engaging portion 23.

(Configuration of extension tube 3)
The extension tube 3 is made of a member having flexibility similar to that of the indwelling catheter 20. One end of the extension tube 3 is connected to the in-hub flow path 21 a of the catheter hub member 21 via the connector part 4. The female connector 5 is provided at the other end of the extension tube 3. Since the male connector provided in the infusion tube is connected to the female connector 5 as described above, the other end of the extension tube 3 is connected to the infusion tube via the female connector 5 and the male connector. become. The inner diameter of the extension tube 3 is set larger than the inner diameter of the indwelling catheter 20.

  The length of the extension tube 3 is set longer than the length of the indwelling catheter 20. Thereby, as shown in FIG. 1 etc., sufficient length can be given to bend the middle part of the extension tube 3 in a ring shape. Two to three turns of the ring-shaped portion can be provided.

(Configuration of connector part 4)
The connector part 4 is made of a hard resin member similar to the catheter hub member 21. One end of the extension tube 3 is attached to the connector part 4. The connector part 4 is for connecting one end of the extension tube 3 to the catheter hub member 21.

  As shown in FIGS. 2 to 4, the connector component 4 has a connector main body portion 40 to which the extension tube 3 is attached, and an insertion portion 41 to be inserted into the in-hub channel 21 a of the catheter hub member 21. . The connector main body portion 40 and the insertion portion 41 may be integrally formed, or may be integrated after the connector main body portion 40 and the insertion portion 41 are formed by separate members. The insertion portion 41 is formed in a cylindrical shape that protrudes from the connector main body portion 40, and is cylindrical in this embodiment. The connector main body 40 has a flat shape that is long in the direction intersecting the protruding direction of the insertion portion 41 so as to correspond to the flat shape of the catheter hub member 21. As a result, the longitudinal direction of the catheter hub member 21 and the longitudinal direction of the connector main body 40 are both left and right, and the longitudinal directions of both are the same.

  The insertion portion 41 is located at the center in the left-right direction on the tip-side surface of the connector main body 40. The center line of the insertion part 41 and the longitudinal direction of the connector main body part 40 are substantially orthogonal. Further, the center line of the insertion portion 41 and the center line of the indwelling catheter 20 are arranged so as to substantially coincide with each other. The inner diameter of the insertion portion 41 is set so that it can be inserted into the in-hub flow path 21a, and is equal to or slightly smaller than the in-hub flow path 21a. The insertion part 41 is a part for reducing the volume of the in-hub flow path 21a, and the thickness and length of the insertion part 41 allows the flow of chemicals and the like as much as possible while reducing the volume of the in-hub flow path 21a. It is set not to inhibit.

  The connector main body 40 is formed so as to be inserted between the first hub member side engaging portion 22 and the second hub member side engaging portion 23 of the catheter hub member 21. An in-connector channel 4 a is formed inside the connector main body 40 and the insertion portion 41. One end portion (tip portion) of the in-connector flow path 4a is opened at the distal end portion in the insertion direction of the insertion portion 41 to the in-hub flow path 21a. The in-connector flow path 4 a extends from the distal end portion of the insertion portion 41 to the inside of the connector main body portion 40.

  The connector main body 40 is formed with a tube insertion hole 4b into which one end of the extension tube 3 is inserted over a predetermined length. The tube insertion hole 4b is opened on one side surface of the connector main body 40 in the left-right direction, and one end of the extension tube 3 can be inserted into the tube insertion hole 4b and assembled from this opening. The outer peripheral surface of one end of the extension tube 3 inserted into the tube insertion hole 4b is fixed in a liquid-tight state to the inner peripheral surface of the tube insertion hole 4b. The tube insertion hole 4 b communicates with the in-connector flow path 4 a inside the connector main body 40. Therefore, the in-connector flow path 4 a communicates with one end of the extension tube 3 inside the connector main body 40.

  In this embodiment, one end of the extension tube 3 is connected to the catheter hub member 21 so as to extend in a direction crossing the direction of the center line of the indwelling catheter 20. That is, as shown in FIG. 3, when the center line direction of the indwelling catheter 20 is the left-right direction in FIG. 3, one end portion of the extension tube 3 is arranged so as to be in the up-down direction in FIG. 3. As a result, the direction in which the extension tube 3 protrudes from the connector part 4 and the direction in which the indwelling catheter 20 protrudes from the catheter hub member 21 intersect with each other, and the directions of the two differ. Convenience is enhanced when it is desired to fix the extension tube 3 to the patient's skin so that the extension tube 3 is not positioned on the extension line of the line.

  The connector main body portion 40 is formed with a first concave portion 40a and a second concave portion 40b that are formed so that the first convex portion 22a and the second convex portion 23a of the catheter hub member 21 are fitted respectively. The first recess 40 a is formed in a portion of the connector main body 40 that is covered by the end of the first hub member side engaging portion 22 of the catheter hub member 21. The second recess 40 b is formed in a portion of the connector main body 40 that is covered by the end of the second hub member side engaging portion 23 of the catheter hub member 21.

  When the connector main body 40 is inserted between the first hub member side engaging portion 22 and the second hub member side engaging portion 23 of the catheter hub member 21, the first hub member side engaging portion 22 and the second hub member side engaging portion 22 Due to the elasticity of the hub member side engaging portion 23, the distance between the hub member side engaging portions 22, 23 is widened, so that the first hub member side engaging portion 22 and the second hub member side engaging portion 23 are spaced from each other. It becomes possible to insert the connector main body 40 into the connector. After the insertion of the connector main body 40, the shapes of the first hub member side engaging portion 22 and the second hub member side engaging portion 23 are restored, and the first convex portion 22a and the second convex portion 23a are respectively the first concave portions. It fits in 40a and the 2nd recessed part 40b, and the connector component 4 and the catheter hub member 21 are integrated.

(Configuration of metal needle 6)
The metal needle 6 is a member that serves as a guide for inserting the indwelling catheter 20 into the blood vessel, and has an outer diameter smaller than the inner diameter of the indwelling catheter 20 so that the indwelling catheter 20 can be inserted. As shown in FIG. 10, the length of the metal needle 6 is set to be longer than the length of the indwelling catheter 20, and the metal needle 6 is placed in the indwelling catheter 20 before the operator performs the puncture procedure (initial state). The sharp end portion of the distal end portion of the metal needle 6 protrudes from the distal end portion of the indwelling catheter 20, and the proximal end portion of the metal needle 6 projects from the proximal end portion of the indwelling catheter 20. In this state, the center line of the metal needle 6 coincides with the center line of the indwelling catheter 20. On the other hand, after the indwelling catheter 20 is placed, the metal needle 6 is pulled out of the indwelling catheter 20.

(Configuration of needle base member 7)
As shown in FIGS. 10 and 11, a needle base member 7 is fixed to the base end portion of the metal needle 6, and the metal needle 6 and the needle base member 7 are integrated. The needle base member 7 is made of a hard resin material and is inserted into a push operation member 9 provided in a gripping component 8 described later, and has a rod shape extending in the center line direction of the push operation member 9. There is no.

  A distal end portion 7a is provided at the distal end portion of the needle base member 7, and the proximal end portion of the metal needle 6 is inserted into the distal detail portion 7a. As shown in FIG. 7 and the like, the proximal end portion of the needle base member 7 is formed with a protruding portion 7b that protrudes in the radial direction. Two protrusions 7b can be formed in the state where the circumferential direction of the needle base member 7 is spaced, but the number of the protrusions 7b can be arbitrarily set. The protruding portion 7 b is a portion for fixing the needle base member 7 to the proximal end portion of the gripping component 8.

(Configuration of gripping component 8)
The gripping component 8 is a member for an operator to grip when performing a puncture technique, and a metal needle 6 is attached via a needle base member 7. The material constituting the gripping component 8 can be a hard resin material, for example, similar to the needle base member 7. The gripping component 8 is provided with a pushing operation member 9 that abuts on the catheter hub member 21 and pushes the catheter hub member 21. Details of the push operation member 9 will be described later. Here, the operator refers to a person who performs a puncture technique, an indwelling technique, a fixing technique, and the like, for example, a medical worker such as a doctor.

  The gripping component 8 is formed in a hollow shape and extends in the pushing operation direction, that is, the puncturing direction, and both ends in the center line direction are open. As shown in FIG. 10, the gripping component 8 is formed with a slit 8 a. The slit 8 a extends from the distal end portion of the gripping component 8 toward the proximal end side to the middle portion in the center line direction of the gripping component 8.

  As shown in FIG. 7 and the like, distal end side openings 8b and 8b are formed in the portion of the gripping component 8 near the distal end. Further, proximal end openings 8c and 8c are formed in a portion of the gripping component 8 near the proximal end. A protrusion 7 b of the needle base member 7 is fitted into the proximal end side openings 8 c and 8 c from the inside of the gripping component 8. Each protrusion 7b is engaged with the peripheral edge of the proximal end opening 8c in a state of being fitted into the proximal end opening 8c. As a result, the needle base member 7 and the gripping component 8 are integrated, and the needle base member 7 is prevented from moving in both the puncture direction and the circumferential direction with respect to the gripping component 8.

  Further, as shown in FIG. 11 and FIG. 13, a concave strip portion 8 d is formed on the inner peripheral surface of the gripping component 8. The concave strip portion 8d extends linearly from the distal end portion of the gripping component 8 toward the proximal end side. The concave stripe portion 8d serves as a guide portion for guiding the push operation member 9 with respect to the gripping component 8 in the center line direction.

  As shown in FIGS. 7 and 8, a pair of holder portions 8 e and 8 e for holding the catheter hub member 21 are provided at the distal end portion of the gripping component 8. The holder portions 8e and 8e are formed so that the distance between the holder portions 8e and 8e becomes narrower toward the tip thereof. By inserting the catheter hub member 21 between the holder portions 8e and 8e, the catheter hub member 21 is moved in the left-right direction. It is held in a state of being sandwiched by holder portions 8e and 8e from both sides.

(Configuration of push operation member 9)
The material constituting the push operation member 9 can be, for example, a hard resin material like the needle base member 7. The push operation member 9 is formed in a cylindrical shape to be inserted into the gripping component 8 and is attached to the gripping component 8 so as to be slidable in the center line direction. In the initial state shown in FIG. 7 to FIG. 9, the push operation member 9 is housed in the gripping component 8 so that the tip end portion is not exposed from the tip end portion of the gripping component 8. At this time, the proximal end portion of the push operation member 9 is also accommodated in the gripping component 8 so as not to be exposed from the proximal end portion of the gripping component 8. In a state where the push operation member 9 is accommodated in the gripping component 8, the center line of the push operation member 9 and the center line of the grip component 8 extend in the same direction.

  The push operation member 9 is provided with a finger abutting portion 9a on which an operator's finger abuts. The finger contact portion 9 a has a plate shape that protrudes from the slit 8 a of the gripping component 8 to the outside of the gripping component 8 and extends in the center line direction of the gripping component 8. This finger contact portion 9 a can slide on the outer surface of the gripping component 8. The pushing operation member 9 can be stabilized by bringing the finger into contact with the finger contact portion 9a, and the gripping component 8 can also be stabilized in the initial state. The finger contact portion 9a can be provided with an uneven shape for preventing slipping.

  The push operation member 9 is placed on the gripping component 8 until the middle part of the push operation member 9 in the center line direction reaches a needle removal completion position (shown in FIGS. 12 and 13) exposed from the tip of the gripping component 8. On the other hand, it is possible to slide. This sliding operation can also be realized by moving the gripping component 8 while the push operation member 9 is fixed.

  As shown in FIG. 11, the needle base member 7 can be accommodated inside the push operation member 9. In a state where the needle base member 7 is accommodated in the push operation member 9, the center line of the push operation member 9 and the center line of the needle base member 7 extend in the same direction. The side of the needle base member 7 opposite to the fixing side (base end side) of the metal needle 6 protrudes from the base end portion of the push operation member 9 and is fixed to the base end portion of the gripping component 8 by the protrusion 7b. Has been. As shown in FIG. 10, in the initial state, the needle base member 7 is accommodated in the push operation member 9, and the metal needle 6 protrudes from the distal end portion of the push operation member 9 and enters the indwelling catheter 20. The sharpened portion is inserted and protrudes from the distal end portion of the indwelling catheter 20.

  The push operation member 9 is formed with a protruding portion 9 b so as to protrude outward of the push operation member 9. The protrusion 9b extends linearly from the distal end of the push operation member 9 toward the proximal end. The protruding portion 9 b is formed so as to fit into a recessed portion 8 d formed on the inner peripheral surface of the gripping component 8. Thereby, the push operation member 9 is guided in the center line direction with respect to the gripping component 8. Although not shown in the drawings, a recess is formed on the outer peripheral surface of the push operation member 9, and a protrusion is formed on the inner peripheral surface of the gripping component 8 so that the protrusion is fitted to the recess. Good. That is, a guide portion for guiding the push operation member 9 in the center line direction is provided on the inner peripheral surface of the gripping component 8, and the guided portion is guided on the outer peripheral surface of the push operation member 9 by the guide portion. On the contrary, a guide portion for guiding the gripping component 8 in the center line direction is provided on the outer peripheral surface of the push operation member 9, and the guide portion is guided on the inner peripheral surface of the gripping component 8. A guided portion can be provided. The shapes of the guide portion and the guided portion may be shapes other than the ridge portion and the concave portion.

  As shown in FIGS. 13 and 14, the distal end portion of the push operation member 9 is provided with a contact surface 9 c on which the proximal end portion of the catheter hub member 21 contacts. The contact surface 9 c extends in a direction orthogonal to the center line of the push operation member 9. Further, an insertion piece 9d inserted between the first hub member side engaging portion 22 and the second hub member side engaging portion 23 of the catheter hub member 21 protrudes from the distal end portion of the push operation member 9. Has been. The metal needle 6 passes through the inside of the insertion piece portion 9d.

  The push operation member 9 is provided with needle removal completion engaging portions 9e and 9e that engage with the gripping component 8 when the push operation member 9 is at the needle removal completion position (shown in FIGS. 12 and 13). It has been. The needle removal completion engagement portions 9e and 9e are formed of protrusions that protrude radially outward from the outer peripheral surface of the proximal end portion of the push operation member 9. The needle removal completion engagement portions 9e and 9e are urged outward in the radial direction of the push operation member 9 by the elasticity of the resin. When the push operation member 9 reaches the needle removal completion position, the needle removal completion engagement portions 9e and 9e are fitted into the distal end side opening portion 8b of the gripping component 8 and engaged with the peripheral edge portion of the distal end side opening portion 8b.

  Further, the length of the push operation member 9 is set so as to cover the metal needle 6 up to its tip when the push operation member 9 is in the above-mentioned needle removal completion position. Thereby, since the metal needle 6 is not exposed from the push operation member 9 when the push operation member 9 reaches the above-mentioned needle removal completion position, erroneous puncture can be prevented. Further, when the push operation member 9 is in the above described needle removal completion position, the needle removal completion engaging portions 9e, 9e are engaged with the peripheral edge portion of the distal end side opening 8b of the gripping component 8, so that the push operation member 9 Can be prevented from sliding in the direction of being accommodated in the gripping component 8, and safety can be improved.

(Puncture, indwelling, fixation procedure)
Next, puncturing, indwelling, and fixing techniques will be described. First, as shown in FIGS. 7 to 11, an indwelling needle device 1 in an initial state is prepared. In this initial state, the extension tube 3, the connector part 4 and the female connector 5 are not attached to the catheter hub member 21 or the gripping part 8, the push operation member 9 is accommodated in the gripping part 8, and the catheter hub member 21 is held by holder portions 8e and 8e at the tip of the gripping component 8. The metal needle 6 is fixed to the gripping component 8 via the needle base member 7 and is inserted into the in-hub flow path 21 a of the catheter hub member 21 and the indwelling catheter 20 from the distal end portion of the push operation member 9. The sharpened portion of the metal needle 6 protrudes from the distal end portion of the indwelling catheter 20.

  When starting the puncture technique, first, the operator holds the gripping part 8, makes the finger contact the finger contact portion 9 a of the push operation member 9, and places the sharpened portion of the metal needle 6 on the skin puncture portion. Sting. When the gripping component 8 is pushed in the puncture direction of the indwelling catheter 20 as it is, force in the puncture direction is transmitted to the catheter hub member 21 via the push operation member 9, thereby pushing the catheter hub member 21. A push operation can be performed by the member 9. By this operation, the indwelling catheter 20 and the metal needle 6 are inserted deeply until they reach the blood vessel. While the indwelling catheter 20 and the metal needle 6 are inserted, the gripping component 8 and the push operation member 9 are made of hard resin, so that the deformation of the part held by the operator is suppressed. Therefore, the insertion procedure of the indwelling catheter 20 and the metal needle 6 can be easily performed. After insertion of the indwelling catheter 20 and the metal needle 6, when the operator visually recognizes the backflow of blood, the operator inserts the metal needle 6 and the indwelling catheter 20 slightly further. This is because the indwelling catheter 20 is surely inserted into the blood vessel.

  The indwelling catheter 20 is inserted into the blood vessel by pushing the indwelling part 2 to a desired position in this way. Since the metal needle 6 is an auxiliary part for inserting the indwelling catheter 20 into the blood vessel, after visually confirming that the indwelling catheter 20 has been reliably inserted into the blood vessel, the metal needle 6 remains in place in the blood vessel. Needle 6 must be withdrawn from indwelling catheter 20. When performing the procedure (needle extraction) of pulling out the metal needle 6 from the indwelling catheter 20, the operator moves the push operation member 9 while keeping the finger in contact with the finger contact portion 9 a of the push operation member 9. The gripping component 8 is slid in the direction opposite to the puncturing direction. At this time, since the gripping component 8 is guided in the center line direction of the push operation member 9, it can be easily slid in a desired direction. Since the gripping component 8 and the needle base member 7 are integrated, the metal needle 6 can be removed from the body by sliding the gripping component 8 in the direction opposite to the puncturing direction. At this time, the holder portions 8 e and 8 e of the grasping component 8 are elastically deformed, and the catheter hub member 21 is detached from the distal end portion of the grasping component 8. Since the catheter hub member 21 is only in contact with the distal end portion of the push operation member 9, the catheter hub member 21 and the push operation member 9 can be easily separated.

  When the indwelling catheter 20 is indwelled, blood flows backward through the indwelling catheter 20 and flows into the in-hub flow path 21 a of the catheter hub member 21. After confirming this, the connector main body portion 40 of the connector part 4 is inserted between the first hub member side engaging portion 22 and the second hub member side engaging portion 23 of the catheter hub member 21, and the insertion portion 41 is inserted into the in-hub flow path 21 a of the catheter hub member 21. At this time, blood is filled in the in-hub flow path 21a so that air is not mixed, but by inserting the insertion part 41 into the in-hub flow path 21a, the volume of the insertion part 41, the flow in the hub As a result, the volume of the channel 21a is reduced, and thus the amount of blood required to fill the in-hub channel 21a is reduced. Moreover, since the insertion part 41 is cylindrical, the connection with the in-hub flow path 21a can be reliably performed by inserting into the in-hub flow path 21a.

  After indwelling the indwelling catheter 20, the catheter hub member 21 is fixed to the skin using a dressing member or the like (not shown). As the dressing member, for example, a protective film or the like can be used. By using the dressing member, one end of the catheter hub member 21 and the extension tube 3 can be fixed to the skin, and bacteria can be prevented from entering from the puncture portion of the skin. In this embodiment, since the catheter hub member 21 and one end of the extension tube 3 are fixed by the dressing member, one end of the catheter hub member 21 and the extension tube 3 is a fixed portion to be fixed to the skin. In addition, the site | part fixed with a dressing member can also be made into multiple places as needed. For example, the indwelling catheter 20 can be prevented from being pulled out when a tensile force is applied by bending the middle part of the extension tube 3 in a ring shape and fixing it to the skin.

  Further, by connecting an infusion tube (not shown) to the female connector 5, infusion therapy can be started. The indwelling catheter 20 can also be used for patient blood pressure measurement.

  Moreover, by making the size along the center line direction of the indwelling catheter 20 in the catheter hub member 21 shorter than the size along the center line direction of the female connector 5, while making the size of the female connector 5 in accordance with the standard, The catheter hub member 21 becomes sufficiently small. Since the catheter hub member 21 is small, the catheter hub member 21 is less susceptible to the influence of body movement and the bending operation of the movable part while being fixed to the skin. In addition, since the dimension of the catheter hub member 21 in the direction intersecting the center line direction of the indwelling catheter 20 is shorter than the dimension of the female connector 5 in the radial direction, the catheter hub member 21 moves the body or bends the movable part. It becomes more difficult to be affected by.

(Effect of embodiment)
As described above, in the first embodiment, when the extension tube 3 is connected to the catheter hub member 21, the insertion portion 41 of the connector part 4 is inserted into the in-hub flow path 21a. When the insertion part 41 is inserted into the in-hub flow path 21a, the volume of the in-hub flow path 21a is reduced by the volume of the insertion part 41. Therefore, even if the amount of blood flowing back to the in-hub flow path 21a is small, the in-hub flow path 21a is filled with blood, so that the blood filling amount can be small. Therefore, especially in the case of a low birth weight infant, a decrease in blood volume in the body is suppressed, and the time during which the in-hub flow path 21a is filled with blood is shortened, further reducing the risk of infectious diseases.

  Further, the first hub member side engaging portion 22 and the second hub member side engaging portion 23 of the catheter hub member 21 sandwich the connector main body portion 40, whereby the connector component 4 and the catheter hub member 21 are rattled. Integrated so as not to connect. And since the 1st hub member side engaging part 22 and the 2nd hub member side engaging part 23 engage from the side in which the insertion part 41 in the connector main body part 40 was formed, the insertion part 41 is a hub. It becomes difficult to escape from the inner flow path 21a. Furthermore, since the first convex portion 22a and the second convex portion 23a of the catheter hub member 21 are fitted in the first concave portion 40a and the second concave portion 40b of the connector main body 40, respectively, the insertion portion 41 is further removed from the in-hub channel 21a. It becomes even more difficult to escape.

  Further, since the metal needle 6 is attached to the gripping part 8 gripped by the operator and the pushing operation member 9 for pushing the catheter hub member 21 is provided, the metal needle can be obtained simply by pushing the gripping part 8. 6 and the catheter hub member 21 can be pushed forward simultaneously, so that the indwelling catheter 20 can be placed in the blood vessel by a conventional technique.

  After the indwelling catheter 20 is placed, the female connector 5 connected to the infusion tube is connected to the catheter hub member 21 via the extension tube 3, and the extension tube 3 has flexibility. Even if the catheter hub member 21 is fixed in the vicinity of the movable part of the body, the extension tube 3 is bent so as to follow the body movement and the bending operation of the movable part. Thereby, it becomes difficult for the force which bends with respect to the indwelling catheter 20 to act, and obstruction | occlusion of the indwelling catheter 20 is suppressed.

  Moreover, since the catheter hub member 21 is smaller than the female connector 5, the external force received by the body movement or the bending operation of the movable part is reduced, and interference with the wrist or the like hardly occurs.

  Furthermore, since the catheter hub member 21 is smaller than the female connector 5, the contact area between the catheter hub member 21 and the skin is reduced, and the compression of the skin by the catheter hub member 21 can be reduced. Thereby, it is possible to further reduce the invasiveness.

(Embodiment 2)
FIG. 16 shows the indwelling component 2, the extension tube 3, and the connector component 4 according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment in that the sealing material S is provided, and the other parts are the same as those in the first embodiment. A description thereof will be omitted, and different portions will be described in detail.

  That is, in the second embodiment, an elastic material is provided between the opening peripheral edge of the in-connector channel 4a at the distal end of the insertion part 41 of the connector component 4 and the inner surface of the in-hub channel 21a of the catheter hub member 21. A sealing material S made of is provided so as to contact the peripheral edge of the opening and the inner surface. The sealing material S can be made of, for example, silicon rubber, and can be an O-ring. The sealing material S is inserted into the in-hub flow path 21a of the catheter hub member 21 in advance, and then the insertion portion 41 of the connector part 4 is inserted into the in-hub flow path 21a of the catheter hub member 21, thereby sealing performance. Can be increased.

  In the second embodiment, the same effects as those of the first embodiment can be obtained.

(Embodiment 3)
FIG. 17 shows an indwelling component 2, an extension tube 3, and a connector component 4 according to Embodiment 3 of the present invention. The third embodiment is different from the first embodiment in that the sealing material S is provided and the insertion cylinder portion 21d that is inserted into the insertion portion 41 is provided, and other portions are implemented. Since the configuration is the same as that of the first embodiment, the same portions as those of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different portions are described in detail.

  The sealing material S is the same as that of the second embodiment. An insertion tube portion 21 d that is inserted into the insertion portion 41 of the connector part 4 is provided on the inner surface of the in-hub flow path 21 a of the catheter hub member 21. When the insertion part 41 of the connector part 4 is inserted into the in-hub flow path 21a of the catheter hub member 21, the insertion cylinder part 21d is inserted into the insertion part 41, so that the gap between the catheter hub member and the 21 connector part 4 is inserted. Sealability can be further enhanced.

  In the third embodiment, the same effects as those of the first embodiment can be obtained.

(Embodiment 4)
18 to 20 show an indwelling component 2, an extension tube 3, a connector component 4, and a female connector 5 according to Embodiment 4 of the present invention. The fourth embodiment is different from the first embodiment in that the connector main body portion 40 is provided with a connector side engaging portion that engages with the catheter hub member 21, and the other portions are the same as the first embodiment. Therefore, hereinafter, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and different parts will be described in detail.

  That is, as shown in FIG. 20, the connector-side engaging portion of the connector main body portion 40 includes a first connector-side engaging portion 42 and a second connector-side engaging portion that are arranged so as to sandwich the catheter hub member 21 from the left-right direction. And a joint portion 43. The first connector side engaging portion 42 and the second connector side engaging portion 43 are formed so as to extend toward the distal end side of the catheter hub member 21 along the lateral side surface of the catheter hub member 21. A convex portion 42 a that protrudes toward the second connector side engaging portion 43 is formed at the end of the first connector side engaging portion 42. A convex portion 43 a that protrudes toward the first connector side engaging portion 42 is formed at the end of the second connector side engaging portion 43.

  The convex portion 42a of the first connector side engaging portion 42 and the convex portion 43a of the second connector side engaging portion 43 are concave portions 21e formed on the side surfaces of the catheter hub member 21 in the left-right direction (only one in FIG. 19). It is designed to be engaged by fitting in (shown). Thereby, the connector component 4 and the catheter hub member 21 are integrated so as not to rattle.

  In the fourth embodiment, the same effects as those of the first embodiment can be obtained.

(Other embodiments)
The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  For example, in Embodiment 4, the sealing material of Embodiment 2 and the insertion cylinder part of Embodiment 3 can be provided.

  As described above, the indwelling needle device according to the present invention can be used, for example, when performing infusion therapy.

DESCRIPTION OF SYMBOLS 1 Indwelling needle apparatus 2 Indwelling part 3 Extension tube 4 Connector part 4a In-connector flow path 8 Holding part 9 Pushing operation member 9e Needle extraction completion engagement part 20 Indwelling catheter 21 Catheter hub member 21a In-hub flow path 21d Insertion cylinder part 22 1st hub member side engaging part 22a 1st convex part 23 2nd hub member side engaging part 23a 2nd convex part 40 Connector main-body part 41 Insertion part 42 1st connector side engaging part 43 2nd connector side engaging part S sealing material

Claims (10)

An indwelling part having a catheter to be placed in a blood vessel, and a catheter hub member attached to the catheter and formed with an in-hub flow path communicating with the proximal end of the catheter;
An extension tube,
In the indwelling needle device provided with the extension tube and a connector part for connecting the extension tube to the catheter hub member,
The connector component has an insertion portion that is inserted into the in-hub flow path, and an in-connector flow path that is open at the distal end in the insertion direction of the insertion portion and communicates with the extension tube. Indwelling needle device to do. The indwelling needle device according to claim 1,
The connector component includes a connector main body to which the extension tube is attached,
The indwelling needle device, wherein the insertion portion is formed in a cylindrical shape protruding from the connector main body portion, and the in-connector flow path is formed inside the insertion portion. The indwelling needle device according to claim 2,
The indwelling needle device, wherein the catheter hub member is provided with a hub member side engaging portion that engages with the connector main body portion. The indwelling needle device according to claim 3,
The hub member side engaging portion of the catheter hub member has a first hub member side engaging portion and a second hub member side engaging portion arranged so as to sandwich the connector main body portion,
The indwelling needle device, wherein the first hub member side engaging portion and the second hub member side engaging portion are engaged from the opposite side of the connector main body where the insertion portion is formed. The indwelling needle device according to claim 4,
A first convex portion and a second convex portion are formed on the first hub member side engaging portion and the second hub member side engaging portion, respectively.
The indwelling needle device, wherein the connector main body portion is formed with a first concave portion and a second concave portion formed so that the first convex portion and the second convex portion are fitted respectively. The indwelling needle device according to claim 2,
The indwelling needle device, wherein the connector main body portion is provided with a connector side engaging portion that engages with the catheter hub member. The indwelling needle device according to claim 6,
The connector-side engagement portion of the connector main body has a first connector-side engagement portion and a second connector-side engagement portion that are arranged so as to sandwich the catheter hub member. Indwelling needle device to do. In the indwelling needle device according to any one of claims 2 to 7,
A sealing material made of an elastic material is interposed between the opening peripheral edge of the in-connector channel at the distal end of the connector part in the insertion direction and the inner surface of the in-hub channel of the catheter hub member. An indwelling needle device, wherein the indwelling needle device is provided so as to be in contact with the peripheral edge of the opening and the inner surface thereof. In the indwelling needle device according to any one of claims 2 to 8,
An indwelling needle device, wherein an insertion tube portion to be inserted into the insertion portion of the connector part is provided on an inner surface of the in-hub flow path of the catheter hub member. In the indwelling needle device according to any one of claims 2 to 9,
The catheter hub member has a flat shape that is long in the radial direction of the extension tube,
The indwelling needle device, wherein the connector main body has a flat shape that is long in a direction intersecting a protruding direction of the insertion portion so as to correspond to the flat shape of the catheter hub member.

Images