JP7174945B2 - indwelling needle device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indwelling needle device used, for example, when performing infusion therapy.

When performing treatments such as infusion therapy, blood transfusion, extracorporeal circulation, etc., the needle is placed in a patient's blood vessel while being punctured. In recent years, there is a tendency to use indwelling needles having catheters made of soft materials for the purpose of reducing damage to blood vessels during indwelling.

A typical indwelling needle device consists of an indwelling part consisting of a hub member for connecting an extension tube, a soft catheter to be indwelled in a blood vessel, and a sharpened portion that is inserted into the catheter and protrudes from the distal end of the catheter. and a grasping part consisting of a part for holding the metal needle.

At the time of use, the operator first holds the gripping part and punctures the blood vessel with the metal needle and the catheter. Puncture of the blood vessel by the metal needle can be confirmed by visually checking the backflow of blood in the indwelling part. This phenomenon is commonly called "flashback". After confirming flashback, the metal needle and catheter are inserted slightly further. This is to ensure that the catheter is inserted into the blood vessel.

By pushing the indwelling part to the desired position in this manner, the catheter is inserted into the blood vessel. Since the metal needle is an auxiliary part for inserting the catheter into the blood vessel, after the catheter is inserted into the blood vessel, the metal needle is pulled out from the catheter while the catheter remains in the blood vessel, and the hub member is placed on the epidermis of the patient. fixed. At this time, the indwelling of the catheter in the blood vessel is confirmed by the backflow (flashback) of blood into the catheter. An extension tube, which has been primed, for example, by filling it with saline, is then connected to the hub member. When the extension tube is connected to the hub member, the hub member is filled with blood to prevent air from entering the flow channel, and after the air in the flow channel is released, it is fixed with a lock nut. Infusion therapy can thus be initiated.

After the catheter is indwelled in the blood vessel, the hub member and the extension tube are attached to the skin using a sealing dressing material in order to fix the connecting portion between the hub member and the extension tube and to prevent bacteria from entering the punctured portion of the skin. Cover with the puncture site. The extension tube is fixed to the epidermis with 2 to 3 turns. This reduces the pulling force applied to the puncture site of the skin by the extension tube when the infusion line on the upstream side of the extension tube gets caught on a bed rail, etc., or when the infusion line is deliberately removed, preventing the catheter from coming off. This is for suppression.

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

JP 2006-296797 A JP 2014-136115 A JP 2016-182188 A JP 2017-153658 A

By the way, when the extension tube is connected to the hub member, the hub member is filled with blood to prevent air from entering the flow path. Reverse blood is also greatly affected by a decrease in the blood volume in the body, and there is a demand to reduce the reverse blood volume as much as possible. In addition, since low birth weight infants have low blood pressure, it takes time for the hub member to be filled with blood due to flashback. Since the flow path becomes an open system while waiting to be filled with blood, there is a problem that bacteria in the air are more likely to enter the blood. Furthermore, low birth weight infants have low immunity and are at high risk of causing infectious diseases, so there is also a demand to shorten the time during which the flow path is open as much as possible.

Therefore, it is conceivable to prepare a syringe filled with physiological saline and administer the physiological saline into the inside of the hub member to increase the volume, but this increases the number of procedures and increases the cost. Therefore, it is desired to fill the inside of the hub member with the patient's blood.

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and its object is to prevent air from entering the flow path while reducing the backflow of blood into the hub member. Another object of the present invention is to reduce the decrease in blood volume in the body to enhance safety during treatment, and to further reduce the risk of developing infectious diseases by shortening the time during which the flow path is open.

In order to achieve the above object, the present invention reduces the amount of blood that fills the channel by inserting a portion of the connector part into the channel of the catheter hub member.

A first invention is an indwelling component having a catheter to be indwelled in a blood vessel, a catheter hub member attached to the catheter and formed with an in-hub channel communicating with the proximal end of the catheter, and an extension tube. and a connector part to which the extension tube is attached and which connects the extension tube to the catheter hub member, wherein the connector part is inserted into the hub inner channel and is located at the center of the catheter. a cylindrical insertion portion having a center line coinciding with the line; and a connector internal flow path that is open at the distal end portion of the insertion portion in the insertion direction and communicates with the extension tube. It is characterized in that it is inserted in the direction of the centerline of the catheter with respect to the channel in the hub.

According to this configuration, when the catheter is indwelled in the blood vessel by the conventional technique, the blood in the blood vessel flows backward through the catheter and flows into the intra-hub channel. When connecting the extension tube to the catheter hub member, the insertion portion of the connector part is inserted into the hub internal channel. When the inserting portion is inserted into the hub inner channel, the volume of the hub inner channel is reduced by the volume of the inserting portion. Therefore, even if the amount of blood that flows back into the hub internal flow path is small, the internal hub flow path is filled with blood, and the mixture of air is suppressed. Therefore, especially in the case of low birth weight infants, who have a low blood volume, the decrease in blood volume in the body is suppressed, and the time in which the flow path in the hub is filled with blood is shortened, thereby reducing the risk of infection. further reduce.

In a second aspect of the invention, the connector component includes a connector main body to which the extension tube is attached, the insertion portion is formed in a cylindrical shape protruding from the connector main body, and the in-connector flow channel is formed by the insertion. characterized by being formed inside the part.

According to this configuration, since the insertion portion has a tubular shape, the connection with the hub internal flow path is ensured.

A third aspect of the invention is characterized in that the catheter hub member is provided with a hub member side engaging portion that engages with the connector body portion.

According to this configuration, the hub member-side engaging portion of the catheter hub member is engaged with the connector body portion in a state where the extension tube is connected to the catheter hub member, so the connector component is less likely to separate from the catheter hub member.

In a fourth aspect of the 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 to sandwich the connector body portion. wherein the first hub member side engaging portion and the second hub member side engaging portion are engaged from a side of the connector main body portion opposite to the side where 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 component and the catheter hub member are integrated so as not to rattle. be done. Since the first hub member-side engaging portion and the second hub member-side engaging portion are engaged with each other from the opposite side of the connector main body from the side where the insertion portion is formed, the insertion portion is disengaged from the hub inner channel. it gets harder.

In a fifth aspect of the invention, the first hub member side engaging portion and the second hub member side engaging portion are formed with a first convex portion and a second convex portion, respectively, and the connector main body portion is provided with the second A first concave portion and a second concave portion are formed so that the first convex portion and the second convex portion are fitted, respectively.

According to this configuration, when the extension tube is connected to the catheter hub member, the first protrusion and the second protrusion of the catheter hub member are fitted into the first recess and the second recess of the connector main body, respectively, so that the insertion portion can be secured. It becomes even more difficult to get out of the hub inner channel.

A sixth aspect of the invention is characterized in that the connector main body 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 engages with the catheter hub member in a state where the extension tube is connected to the catheter hub member, the connector part is less likely to separate from the catheter hub member.

In a seventh invention, the connector-side engaging portion of the connector body portion has a first connector-side engaging portion and a second connector-side engaging portion arranged 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 without rattling. .

In an eighth aspect of the invention, an elastic material is provided between an opening peripheral edge portion of the connector internal channel at the insertion direction distal end portion of the insertion portion of the connector component and an inner surface of the hub internal channel of the catheter hub member. is provided so as to be in contact with the opening peripheral portion and the inner surface.

According to this configuration, the sealing material seals between the distal end portion of the insertion portion in the insertion direction and the inner surface of the channel in the hub of the connector component.

A ninth aspect of the invention is characterized in that an insertion tubular portion that is inserted into the insertion portion of the connector component is provided on the inner surface of the hub inner channel of the catheter hub member.

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

According to the first aspect of the invention, the connector part for connecting the extension tube to the catheter hub member is formed with an insertion section that is inserted into the channel inside the hub. Since the channel in the connector communicating with the tube is formed, it is possible to prevent air from entering the channel while reducing the backflow of blood. As a result, the decrease in blood volume in the body can be reduced to improve safety, and the time during which the flow path is open can be shortened to further reduce the risk of developing infectious diseases.

According to the second aspect of the invention, since the insertion portion has a tubular shape projecting from the connector main body, it is possible to reliably connect the insertion portion with the hub internal flow path.

According to the third aspect of the invention, since the engaging portion that engages with the connector body is provided on the catheter hub member, it is possible to prevent the connector component from coming off 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, whereby the connector part and the catheter hub member are integrated so as not to rattle. Further, 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 where the insertion portion is formed, so that the insertion portion can be prevented from coming out of the hub inner channel.

According to the fifth invention, when the extension tube is connected to the catheter hub member, the first protrusion and the second protrusion of the catheter hub member are fitted into the first recess and the second recess of the connector main body, respectively. , the insertion portion can be further prevented from slipping out of the hub inner channel.

According to the sixth invention, since the connector component is provided with the engaging portion that engages with the catheter hub member, it is possible to prevent the connector component from being detached from the catheter hub member.

According to the seventh invention, the first connector-side engaging portion and the second connector-side engaging portion sandwich the catheter hub member, thereby integrating the connector part and the catheter hub member without rattling. be able to.

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

According to the ninth aspect of the invention, by inserting the insertion tubular portion formed on the inner surface of the hub inner channel of the catheter hub member into the interior of the insertion portion of the connector component, the sealability between the catheter hub member and the connector component is improved. can be further enhanced.

1 is a perspective view showing an indwelling component, an extension tube, and a connector component of an indwelling needle device according to Embodiment 1 of the present invention; FIG. FIG. 2 is a view equivalent to FIG. 1 showing a state in which the connector part is removed from the catheter hub member; FIG. 2 is a cross-sectional view taken along line III-III in FIG. 1; FIG. 3 is a cross-sectional view taken along line IV-IV in FIG. 2; FIG. 4 is a perspective view of the catheter hub member viewed from the proximal side; It is the perspective view which looked at the connector component from the front end side. FIG. 4 is a perspective view showing a state in which the catheter hub member is attached to the gripping part; FIG. 4 is a plan view showing a state in which the catheter hub member is attached to the gripping part; FIG. 11 is a side view showing a state where the catheter hub member is attached to the gripping part; FIG. 9 is a cross-sectional view taken along the line XX in FIG. 8; FIG. 10 is a cross-sectional view taken along line XI-XI in FIG. 9; FIG. 8 is a view equivalent to FIG. 7 showing a state after needle removal; FIG. 11 is a view corresponding to FIG. 11 showing a state after needle removal; FIG. 8 is a view equivalent to FIG. 7 showing a state in which the catheter hub member is detached from the gripping component; FIG. 12 is a view equivalent to FIG. 11 showing a state in which the catheter hub member is detached from the gripping component; FIG. 3 is a view corresponding to FIG. 3 according to Embodiment 2 of the present invention. FIG. 3 is a view corresponding to FIG. 3 according to Embodiment 3 of the present invention; 1 equivalent view according to Embodiment 4 of the present invention. FIG. FIG. 2 is a view corresponding to FIG. 2 according to Embodiment 4 of the present invention. FIG. 10 is a plan view of a connector component according to Embodiment 4 of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

(Embodiment 1)
FIG. 1 is a perspective view showing an indwelling needle device 1 according to Embodiment 1 of the present invention. This indwelling needle device 1 is used, for example, when indwelling an indwelling catheter 20 in a patient's blood vessel when performing various treatments such as fluid therapy, blood transfusion, and extracorporeal circulation. Through the indwelling catheter 20, it is possible to inject a drug solution into the patient's body or to measure the patient's blood pressure. Since various medical procedures using the indwelling catheter 20 have been conventionally performed, detailed description thereof will be 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. and a gripping part 8 . The female connector 5 shown in FIGS. 1 and 2 is a conventionally well-known tubular member having a luer taper. Although not shown, the male connector and the female connector 5 are connected by inserting the male connector and screwing a lock nut. can be connected.

The female connector 5 and the male connector have sizes according to the standards defined by ISO (International Organization for Standardization) and JIS (Japanese Industrial Standards). The male connector is connected to, for example, an end of an infusion tube of an infusion set (not shown). An infusion set includes 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, the indwelling part 2, the extension tube 3, the connector part 4, and the female connector 5 enable infusion therapy. 6, needle base member 7 and gripping component 8 are not required. On the other hand, from the puncture procedure to the placement procedure, the metal needle 6, the needle base member 7, and the gripping part 8 shown in FIGS. , the connector part 4 and the female connector 5 are removed. The indwelling needle device 1 may be composed of the indwelling part 2 , the extension tube 3 and the connector part 4 , or may be composed of the indwelling part 2 , the extension tube 3 , the connector part 4 and the female connector 5 .

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

(Structure of Placement Part 2)
As shown in FIGS. 3 and 4, the indwelling component 2 includes an indwelling catheter 20 to be indwelled in a blood vessel, and an indwelling catheter 20 attached to the indwelling catheter 20 and communicating with the proximal end of the indwelling catheter 20. and a catheter hub member 21 having 21a formed therein. The indwelling catheter 20 is made of a flexible material (soft material) and has a characteristic of being bendable without damaging the inner wall of the blood vessel. Although the material constituting the indwelling catheter 20 is not particularly limited, conventionally known materials can be used. The length of the indwelling catheter 20 is set so that the proximal end protrudes from the skin puncture site while at least the distal end of the indwelling catheter 20 is indwelled in the patient's blood vessel. The distal end of the indwelling catheter 20 is tapered. In this embodiment, it is called an indwelling catheter 20 because it is a catheter that is indwelled in a patient's blood vessel, but it can also be simply called a catheter or an indwelling needle.

The catheter hub member 21 is composed of a rigid member made of a material harder than the material constituting the indwelling catheter 20 . The catheter hub member 21 is formed to be smaller than the female connector 5, which is a standard product, and is characterized by being smaller than when designed according to conventional ISO and JIS standards.

Specifically, the dimension of the indwelling catheter 20 in the catheter hub member 21 in the centerline direction (puncture direction during a puncture procedure) is set shorter than the dimension of the female connector 5 in the centerline direction. In addition, the dimension of the catheter hub member 21 in the direction intersecting with the centerline direction of the indwelling catheter 20 is set to be shorter than the radial dimension (outer diameter) of the female connector 5 , and is shorter than the maximum outer diameter of the female connector 5 . Also, the maximum dimension of the catheter hub member 21 in the direction crossing the centerline 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 lateral dimension A1 of the catheter hub member 21 shown in FIG. is set short. The height direction of the catheter hub member 21 is the direction in which it protrudes from the skin surface when fixed to the skin, and the lateral direction of the catheter hub member 21 is the direction along the skin surface.

By setting each dimension as described above, the catheter hub member 21 is miniaturized. For example, when comparing the projected area in plan view 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 is smaller. there is

A cylindrical distal end portion 21b is formed on the distal end side of the catheter hub member 21 so as to protrude in the puncture direction during the puncture procedure. The tip tubular portion 21b is positioned at the center of the catheter hub member 21 in the left-right direction and at the center of the catheter hub member 21 in the height direction. The dimension of the catheter hub member 21 in the height direction becomes shorter toward the distal tube portion 21b side, and the contact surface of the catheter hub member 21 with the skin 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 cylindrical portion 21b of the catheter hub member 21, and the outer circumference 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 tip cylindrical portion 21b. The proximal end portion of the indwelling catheter 20 reaches inside the catheter hub member 21 from the distal cylindrical portion 21b.

The inside of the catheter hub member 21 is formed with the above-mentioned in-hub channel 21a. One end (distal end) of the hub inner channel 21 a communicates with the proximal end of the indwelling catheter 20 . The other end of the in-hub channel 21a opens at the center of the catheter hub member 21 in the left-right direction on the proximal surface of the catheter hub member 21 . A constricted portion 21c is provided at the tip of the hub internal flow path 21a. The inner diameter of the hub inner channel 21a other than the constricted portion 21c is set larger than the inner diameter of the indwelling catheter 20 . Further, the inner diameter of the constricted portion 21c of the hub inner 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 has a plate-like first hub member side engaging portion 22 and a second hub member side engaging portion 23 that engage with a connector main body portion 40 of the connector component 4, which will be described later. is provided. The first hub member side engaging portion 22 and the second hub member side engaging portion 23 are arranged to face each other with a space therebetween. An opening of the hub inner channel 21 a is located between the engaging portion 23 and the engaging portion 23 . 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 engage with each other on the connector main body portion 40 from the opposite side of the later-described connector main body portion 40 on which the insertion portion 41 is formed. extends to the proximal face of the . A first convex portion 22 a is formed at an end portion of the first hub member side engaging portion 22 so as to protrude toward the second hub member side engaging portion 23 side. A second convex portion 23a is formed at an end portion of the second hub member side engaging portion 23 so as to protrude toward the first hub member side engaging portion 22 side.

(Configuration of extension tube 3)
The extension tube 3 is made of a flexible member similar to that of the indwelling catheter 20 . One end of the extension tube 3 is connected to the hub inner channel 21 a of the catheter hub member 21 via the connector component 4 . The female connector 5 is provided at the other end of the extension tube 3 . Since the male connector provided on 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 .

Moreover, the length of the extension tube 3 is set longer than the length of the indwelling catheter 20 . As a result, as shown in FIG. 1 and the like, it is possible to provide a sufficient length to bend the intermediate portion of the extension tube 3 into a ring shape. This ring-shaped bent portion can also be provided with 2 to 3 turns.

(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 . This 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 part 4 has a connector body 40 to which the extension tube 3 is attached, and an insertion portion 41 to be inserted into the hub inner channel 21a of the catheter hub member 21. . The connector main body 40 and the insertion portion 41 may be integrally formed, or may be integrated after forming the connector main body 40 and the insertion portion 41 as separate members. The insertion portion 41 is formed in a tubular shape protruding from the connector body portion 40, and has a cylindrical shape in this embodiment. The connector main body 40 has a flat shape elongated in a 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 lateral directions, and the longitudinal directions of both coincide.

The insertion portion 41 is positioned at the center in the left-right direction on the front end side surface of the connector main body portion 40 . The center line of the insertion portion 41 and the longitudinal direction of the connector body portion 40 are substantially orthogonal. Also, the center line of the insertion portion 41 and the center line of the indwelling catheter 20 are arranged so as to substantially match. The inner diameter of the insertion portion 41 is set so as to be able to be inserted into the hub inner channel 21a, and is equal to or slightly smaller than the hub inner channel 21a. The insertion portion 41 is a portion for reducing the volume of the hub inner channel 21a. It is set so as not to interfere.

The connector body 40 is formed 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 . Inside the connector main body portion 40 and the insertion portion 41, an in-connector flow path 4a is formed. One end (tip) of the connector internal channel 4a is open at the tip in the insertion direction of the insertion portion 41 into the hub internal channel 21a. The connector inner channel 4 a extends from the distal end of the insertion portion 41 to the inside of the connector main body 40 .

Further, the connector 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 open on one lateral side surface of the connector main body 40, and one end of the extension tube 3 can be inserted into the tube insertion hole 4b through this opening for assembly. The outer peripheral surface of one end of the extension tube 3 inserted into the tube insertion hole 4b is liquid-tightly fixed to the inner peripheral surface of the tube insertion hole 4b. The tube insertion hole 4 b communicates with the connector inner channel 4 a inside the connector main body 40 . Therefore, the connector internal 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 centerline direction of the indwelling catheter 20 . That is, as shown in FIG. 3, when the centerline direction of the indwelling catheter 20 is the left-right direction in FIG. 3, one end of the extension tube 3 is arranged so as to be the up-down direction in FIG. 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, and the two directions are different. Convenience is increased 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 40 is formed with a first concave portion 40a and a second concave portion 40b 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 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 body 40 covered by the end of the second hub member-side engaging portion 23 of the catheter hub member 21 .

When inserting the connector body 40 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 are inserted. Due to the elasticity of the hub member side engaging portion 23, the distance between the two hub member side engaging portions 22 and 23 widens. It becomes possible to insert the connector body 40 into the . After the connector main body 40 is inserted, 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 respectively become the first concave portions. 40a and the second recess 40b are fitted, 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 a blood vessel, and has an outer diameter smaller than the inner diameter of the indwelling catheter 20 so that it can be inserted into the indwelling catheter 20 . As shown in FIG. 10, the length of the metal needle 6 is set longer than the length of the indwelling catheter 20, and in a state (initial state) before the operator performs the puncture procedure (initial state), the metal needle 6 is longer than the indwelling catheter 20. The tip of the metal needle 6 protrudes from the distal end of the indwelling catheter 20 , and the proximal end of the metal needle 6 protrudes from the proximal end of the indwelling catheter 20 . In this state, the centerline of the metal needle 6 and the centerline of the indwelling catheter 20 are aligned. On the other hand, after the indwelling catheter 20 is indwelled, the metal needle 6 is pulled out from the indwelling catheter 20 .

(Structure of needle base member 7)
As shown in FIGS. 10 and 11, the needle base member 7 is fixed to the proximal 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 pushing operation member 9 provided on a gripping part 8 to be described later. None.

A tapered portion 7a is provided at the distal end portion of the needle base member 7, and the proximal portion of the metal needle 6 is inserted into the tapered portion 7a. As shown in FIG. 7 and the like, the proximal end of the needle base member 7 is formed with a protrusion 7b protruding in the radial direction. Two protrusions 7b can be formed in a state of being spaced apart in the circumferential direction of the needle base member 7, but the number of the protrusions 7b can be set arbitrarily. The projecting 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 part 8)
The grasping part 8 is a member to be grasped by the operator when performing a puncture procedure, and the metal needle 6 is attached via the needle base member 7 . The material constituting the grasping part 8 can be, for example, a hard resin material like the needle base member 7 . The grasping part 8 is provided with a push operation member 9 that abuts against the catheter hub member 21 and pushes the catheter hub member 21 . Details of the pushing operation member 9 will be described later. Here, an operator is a person who performs a puncture procedure, a placement procedure, a fixation procedure, etc., and is, for example, a medical worker such as a doctor.

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

As shown in FIG. 7 and the like, distal end side openings 8b, 8b are formed in a portion of the gripping part 8 near the distal end. In addition, base end side openings 8c, 8c are formed in a portion of the grasping part 8 near the base end. Projections 7b of the needle base member 7 are fitted into the proximal side openings 8c, 8c from the inside of the grip part 8. As shown in FIG. Each projecting portion 7b is engaged with the peripheral portion of the proximal side opening 8c in a state of being fitted into the proximal side opening 8c. As a result, the needle base member 7 and the gripping component 8 are integrated so that the needle base member 7 does not move with respect to the gripping component 8 in both the puncture direction and the circumferential direction.

In addition, as shown in FIGS. 11 and 13, etc., the inner peripheral surface of the gripping part 8 is formed with a grooved portion 8d. The grooved portion 8d extends linearly from the distal end portion of the gripping component 8 toward the proximal end side. The grooved portion 8d serves as a guide portion for guiding the pushing operation member 9 with respect to the gripping part 8 in the center line direction.

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

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

The pushing operation member 9 is provided with a finger contact portion 9a with which the operator's finger contacts. The finger contact portion 9 a protrudes from the slit 8 a of the gripping component 8 to the outside of the gripping component 8 and has a plate shape extending in the center line direction of the gripping component 8 . The finger contact portion 9a is slidable on the outer surface of the gripping component 8. As shown in FIG. By bringing a finger into contact with the finger contact portion 9a, the pushing operation member 9 can be stabilized, and the gripping part 8 can also be stabilized in the initial state. The finger contact portion 9a can be provided with an uneven shape for slip prevention.

The pushing operation member 9 is pushed to the gripping part 8 until it reaches the needle removal completion position (shown in FIGS. 12 and 13) where the middle portion of the pushing operation member 9 in the center line direction is exposed from the tip of the gripping part 8. It is slidable against. This sliding operation can also be realized by moving the grasping part 8 while the pushing operation member 9 is fixed.

As shown in FIG. 11 , the needle base member 7 can be accommodated inside the pushing operation member 9 . When 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 opposite side (basal end side) of the needle base member 7 to the fixing side of the metal needle 6 protrudes from the proximal end portion of the pushing operation member 9 and is fixed to the proximal end portion of the grasping part 8 by a protrusion 7b. It is Further, as shown in FIG. 10 , in the initial state, the needle base member 7 is accommodated in the pushing operation member 9 , and the metal needle 6 protrudes from the distal end portion of the pushing operation member 9 and enters the indwelling catheter 20 . The sharpened portion protrudes from the distal end of the indwelling catheter 20 as it is inserted.

The pushing operation member 9 is formed with a ridge portion 9 b protruding outward from the pushing operation member 9 . The ridge portion 9b extends linearly from the distal end portion of the pushing operation member 9 toward the proximal end portion. The protruding portion 9b is formed so as to fit into a recessed portion 8d formed on the inner peripheral surface of the grip part 8. As shown in FIG. As a result, the pushing operation member 9 is guided in the centerline direction with respect to the gripping part 8 . Although not shown, it is also possible to form a grooved portion on the outer peripheral surface of the pushing operation member 9, form a ridged portion on the inner peripheral surface of the gripping part 8, and fit the ridged portion into the grooved portion. good. That is, a guide portion for guiding the push operation member 9 in the direction of the center line is provided on the inner peripheral surface of the grip part 8, and a guided portion guided by the guide portion is provided on the outer peripheral surface of the push operation member 9. On the contrary, a guide portion for guiding the gripping part 8 in the center line direction is provided on the outer peripheral surface of the pushing operation member 9, and a guide portion is provided on the inner peripheral surface of the gripping part 8 to the guide portion It is possible to provide a guided portion to be guided. The shapes of the guide portion and the guided portion may be shapes other than the ridge portion and the groove portion.

As shown in FIGS. 13 and 14, the distal end portion of the pushing operation member 9 is provided with a contact surface 9c with 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 pushing operation member 9 . At the distal end of the pushing operation member 9, an insertion piece 9d is projected 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. It is 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 engagement portions 9e, 9e that engage with the grip part 8 when the push operation member 9 is in the needle removal completion position (shown in FIGS. 12 and 13). It is The needle removal completion engaging portions 9e, 9e are configured by projections protruding radially outward from the outer peripheral surface of the base end portion of the pushing operation member 9. As shown in FIG. The needle removal completion engaging portions 9e, 9e are biased outward in the radial direction of the pushing operation member 9 by the elasticity of the resin. When the pushing operation member 9 reaches the needle removal completion position, the needle removal completion engaging portions 9e, 9e are fitted into the distal end side opening 8b of the grip part 8 and engage with the peripheral edge of the distal side opening 8b.

Further, the length of the push operation member 9 is set so as to cover the metal needle 6 up to its tip portion when the push operation member 9 is at the needle removal completion position. As a result, the metal needle 6 is not exposed from the push operation member 9 when the push operation member 9 reaches the needle removal completion position, thereby preventing erroneous puncture. Further, when the push operation member 9 is at the needle removal completion position, the needle removal completion engaging portions 9e, 9e engage with the peripheral edge portion of the distal end side opening 8b of the grip part 8, so that the push operation member 9 is pushed. can be prevented from sliding in the direction in which it is accommodated inside the grip part 8, and safety can be enhanced.

(Puncture, placement, fixation technique)
Next, puncture, indwelling, and fixation procedures will be described. First, as shown in FIGS. 7 to 11, the indwelling needle device 1 in its 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 pushing operation member 9 is accommodated in the gripping part 8, and the catheter hub member 21 is held by holder portions 8e, 8e at the tip of the gripping part 8. As shown in FIG. The metal needle 6 is fixed to the grasping part 8 via the needle base member 7 , and is inserted into the hub inner channel 21 a of the catheter hub member 21 and the indwelling catheter 20 from the distal end portion of the pushing operation member 9 . A sharpened portion of the metal needle 6 protrudes from the tip of the indwelling catheter 20 .

When starting the puncture procedure, first, the operator holds the grasping part 8, touches the finger contact portion 9a of the push operation member 9 with the finger, and inserts the sharpened portion of the metal needle 6 into the puncture portion of the skin. stab. Then, when the grasping part 8 is pushed forward in the puncture direction of the indwelling catheter 20 as it is, a force in the puncture direction is transmitted to the catheter hub member 21 via the pushing operation member 9, thereby pushing the catheter hub member 21. A pushing operation can be performed by the member 9 . By this operation, the indwelling catheter 20 and the metal needle 6 are deeply inserted until they reach the blood vessel. Since the grasping part 8 and the pushing operation member 9 are made of hard resin, deformation of the part held by the operator is suppressed while the indwelling catheter 20 and the metal needle 6 are being inserted. Therefore, the procedure for inserting the indwelling catheter 20 and the metal needle 6 can be easily performed. After inserting the indwelling catheter 20 and the metal needle 6, the operator further slightly inserts the metal needle 6 and the indwelling catheter 20 when the backflow of blood is visually observed. This is to ensure that the indwelling catheter 20 is inserted into the blood vessel.

In this way, the indwelling catheter 20 is inserted into the blood vessel by pushing the indwelling component 2 to the desired position. The metal needle 6 is an auxiliary part for inserting the indwelling catheter 20 into the blood vessel. Needle 6 needs to be withdrawn from indwelling catheter 20 . When performing a procedure (needle removal) to pull out the metal needle 6 from the indwelling catheter 20, the operator presses the push operation member 9 while keeping the finger contact portion 9a of the push operation member 9 in contact with the finger. After being fixed, the grasping part 8 is slid in the direction opposite to the puncturing direction. At this time, the grasping part 8 is guided in the direction of the center line of the pushing operation member 9, so that it can be easily slid in the desired direction. Since the grasping part 8 and the needle base member 7 are integrated, the metal needle 6 can be pulled out from the body by sliding the grasping part 8 in the direction opposite to the puncturing direction. At this time, the holder portions 8 e , 8 e of the gripping part 8 are elastically deformed, and the catheter hub member 21 is separated from the distal end portion of the gripping part 8 . Since the catheter hub member 21 is only in contact with the distal end portion of the pushing operation member 9, the catheter hub member 21 and the pushing 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 hub inner channel 21 a of the catheter hub member 21 . After confirming this, the connector body 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 hub inner channel 21 a of the catheter hub member 21 . At this time, blood is filled in the hub inner flow channel 21a so that air does not enter. The volume of channel 21a will be reduced, thus reducing the amount of blood required to fill the in-hub channel 21a. Further, since the insertion portion 41 is cylindrical, it can be reliably connected to the hub inner channel 21a by inserting it into the hub inner channel 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), and the dressing member may be, for example, a protective film or the like. 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 through the punctured portion of the skin. In this embodiment, one ends of the catheter hub member 21 and the extension tube 3 are fixed with a dressing member, so that one end of the catheter hub member 21 and the extension tube 3 are fixed parts fixed to the skin. In addition, the site|part fixed with a dressing member can also be set as several places as needed. For example, by bending the middle portion of the extension tube 3 into a ring shape and fixing it to the skin, it is possible to prevent the indwelling catheter 20 from coming off when a pulling force acts.

Also, 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 blood pressure measurement of the patient.

In addition, while the size of the female connector 5 conforms to the standard, the dimension along the centerline direction of the indwelling catheter 20 in the catheter hub member 21 is made shorter than the dimension along the centerline direction of the female connector 5. The catheter hub member 21 becomes sufficiently small. By making the catheter hub member 21 smaller, the catheter hub member 21 is less likely to be affected by body movements and bending motions of the movable portion when fixed to the skin. In addition, since the dimension of the catheter hub member 21 in the direction intersecting with the centerline direction of the indwelling catheter 20 is set shorter than the dimension in the radial direction of the female connector 5, the catheter hub member 21 is less subject to body movement and bending motion of the movable portion. become less susceptible to the effects of

(Action and effect of the embodiment)
As described above, in the first embodiment, when connecting the extension tube 3 to the catheter hub member 21, the insertion portion 41 of the connector part 4 is inserted into the hub inner channel 21a. When the insert portion 41 is inserted into the hub inner channel 21 a , the volume of the hub inner channel 21 a is reduced by the volume of the insert portion 41 . Therefore, even if the amount of blood flowing back into the hub internal flow path 21a is small, the internal hub flow path 21a is filled with blood, so the amount of blood to be filled can be small. Therefore, especially in the case of low birth weight infants, a decrease in the blood volume in the body is suppressed, and the time during which the hub inner channel 21a is filled with blood is shortened, further reducing the risk of infection.

Further, the connector main body portion 40 is sandwiched between the first hub member side engaging portion 22 and the second hub member side engaging portion 23 of the catheter hub member 21, so that the connector component 4 and the catheter hub member 21 are not loose. It is integrated so that it does not stick. Since the first hub member-side engaging portion 22 and the second hub member-side engaging portion 23 are engaged from the opposite side of the connector main body 40 where the insertion portion 41 is formed, the insertion portion 41 is attached to the 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 into the first concave portion 40a and the second concave portion 40b of the connector body portion 40, respectively, the insertion portion 41 can be more easily displaced from the hub inner channel 21a. It becomes more difficult to get out.

In addition, since the metal needle 6 is attached to the grasping part 8 grasped by the operator and the pushing operation member 9 for pushing the catheter hub member 21 is provided, the metal needle can be operated simply by pushing the grasping part 8 . 6 and catheter hub member 21 can be advanced simultaneously, thereby allowing indwelling catheter 20 to remain indwelling within the vessel by conventional techniques.

After the indwelling catheter 20 is indwelled, the female connector 5 connected to the infusion tube is connected to the catheter hub member 21 via the extension tube 3. Since the extension tube 3 has flexibility, for example, Even if the catheter hub member 21 is fixed near the movable part of the body, the extension tube 3 bends so as to follow the body movement and the bending motion of the movable part. As a result, bending force is less likely to act on the indwelling catheter 20, and occlusion of the indwelling catheter 20 is suppressed.

In addition, since the catheter hub member 21 is smaller than the female connector 5, it receives less external force due to body movement and bending motion of the movable portion, and interferes less with, for example, the wrist.

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 pressure on the skin by the catheter hub member 21 can be reduced. This makes it possible to achieve even less invasiveness.

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

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

Also in this second embodiment, the same effects as in 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 a sealing member S is provided and an insertion tube portion 21d that is inserted into the insertion portion 41 is provided. Since it is the same as the first embodiment, the same parts as in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and the different parts will be 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 component 4 is provided on the inner surface of the hub inner channel 21 a of the catheter hub member 21 . When the insertion portion 41 of the connector component 4 is inserted into the hub inner channel 21 a of the catheter hub member 21 , the insertion tube portion 21 d is inserted into the insertion portion 41 , so that there is no gap between the catheter hub member and the connector component 4 . Sealability can be further improved.

Also in the third embodiment, the same effect as in the first embodiment can be obtained.

(Embodiment 4)
18 to 20 show a placement component 2, an extension tube 3, a connector component 4 and a female connector 5 according to Embodiment 4 of the present invention. Embodiment 4 is different from Embodiment 1 in that a connector main body 40 is provided with a connector-side engaging portion that engages with the catheter hub member 21, and other portions are the same as those in Embodiment 1. Therefore, hereinafter, the same reference numerals are given to the same parts as in the first embodiment, and the description thereof is omitted, and the different parts will be described in detail.

That is, as shown in FIG. 20, the connector-side engaging portion of the connector main body 40 includes a first connector-side engaging portion 42 and a second connector-side engaging portion 42 arranged so as to sandwich the catheter hub member 21 from the left and right directions. and a joining portion 43 . The first connector-side engaging portion 42 and the second connector-side engaging portion 43 are formed to extend toward the distal end side of the catheter hub member 21 along the lateral side surfaces of the catheter hub member 21 . A convex portion 42 a is formed at the end of the first connector side engaging portion 42 so as to protrude toward the second connector side engaging portion 43 side. A convex portion 43 a that protrudes toward the first connector side engaging portion 42 is formed at the end portion 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 correspond to the concave portions 21e (only one side in FIG. shown). As a result, the connector part 4 and the catheter hub member 21 are integrated without rattling.

Also in the fourth embodiment, the same effect as in the first embodiment can be obtained.

(Other embodiments)
The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent range of claims are within the scope of the present invention.

For example, in Embodiment 4, the sealing material of Embodiment 2 or the insertion tube portion of Embodiment 3 can be provided.

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

1 Indwelling Needle Device 2 Indwelling Part 3 Extension Tube 4 Connector Part 4a Connector Inner Flow Path 8 Gripping Part 9 Push Operation Member 9e Needle Removal Completion Engagement Portion 20 Indwelling Catheter 21 Catheter Hub Member 21a Hub Inner Flow Path 21d Insertion Tube Portion 22 First hub member side engaging portion 22a First convex portion 23 Second hub member side engaging portion 23a Second convex portion 40 Connector body portion 41 Insertion portion 42 First connector side engaging portion 43 Second connector side engaging portion S sealing material

Claims (10)

an indwelling component having a catheter to be indwelled in a blood vessel; a catheter hub member attached to the catheter and formed with an in-hub channel communicating with a proximal end portion of the catheter;
an extension tube;
An indwelling needle device having the extension tube attached thereto and a connector part for connecting the extension tube to the catheter hub member,
a direction in which the extension tube protrudes from the connector part and a direction in which the catheter protrudes from the catheter hub member intersect;
The connector part is inserted into the inner channel of the hub and has a cylindrical insertion portion having a center line that matches the center line of the catheter, and a distal end portion of the insertion portion that is open in the direction of insertion and is attached to the extension tube. It has a flow channel in the connector that communicates,
The indwelling needle device, wherein the insertion portion is inserted in the centerline direction of the catheter into the hub inner channel. In the indwelling needle device according to claim 1,
The connector part has a connector body to which the extension tube is attached,
The indwelling needle device, wherein the insertion portion is formed in a tubular shape protruding from the connector main body, and the in-connector channel is formed inside the insertion portion. In 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 body portion. In 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 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 a side opposite to a side of the connector main body portion on which the insertion portion is formed. In the indwelling needle device according to claim 4,
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,
The indwelling needle device, wherein the connector main body 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. In the indwelling needle device according to claim 2,
The indwelling needle device, wherein the connector body is provided with a connector-side engaging portion that engages with the catheter hub member. In the indwelling needle device according to claim 6,
The connector-side engaging portion of the connector body portion has a first connector-side engaging portion and a second connector-side engaging portion arranged to sandwich the catheter hub member. indwelling needle device. In the indwelling needle device according to any one of claims 2 to 7,
A sealing material made of an elastic material is provided between the opening peripheral edge portion of the connector inner channel at the insertion direction distal end portion of the insertion portion of the connector component and the inner surface of the hub inner channel of the catheter hub member. An indwelling needle device, wherein the indwelling needle device is provided so as to come into contact with the opening peripheral portion and the inner surface. In the indwelling needle device according to any one of claims 2 to 8,
An indwelling needle device according to claim 1, characterized in that an insertion tubular portion that is inserted into the insertion portion of the connector part is provided on the inner surface of the hub inner channel 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 elongated in the radial direction of the extension tube,
The indwelling needle device, wherein the connector main body has a flat shape elongated in a direction intersecting the projecting direction of the insertion portion so as to correspond to the flat shape of the catheter hub member.

Images