JP7097019B2 - Indwelling needle device - Google Patents

Description

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

When performing infusion therapy, blood transfusion, extracorporeal circulation, etc., the patient's blood vessel should be indwelled with a needle punctured. In recent years, indwelling needles having a catheter made of a soft member have tended to be used for the purpose of reducing damage to blood vessels during indwelling.

A general indwelling needle device includes an indwelling part consisting of a hub member for connecting an extension tube, a soft catheter indwelled in a blood vessel, and a sharp portion inserted into the catheter and protruding from the tip of the catheter. It is composed of a gripping part composed of a metal needle to be held and a part to hold the metal needle.

At the time of use, the operator first grasps the gripping part and punctures the blood vessel with a metal needle and a catheter. The puncture of the metal needle into the blood vessel can be confirmed by visually recognizing the backflow of blood in the indwelling part. This phenomenon is commonly referred to as "flashback". After confirming the flashback, insert the metal needle and catheter slightly further. This is to ensure that the catheter is inserted into the blood vessel.

The catheter is inserted into the blood vessel by pushing the indwelling part to the desired position in this way. 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 pulled out from the catheter while the catheter is left in the blood vessel, and the hub member is placed on the patient's epidermis. Fix. At this time, it is confirmed by the 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 connecting this extension tube to the hub member, blood is filled in the hub member so that air does not enter the flow path, and after the air in the flow path is released, the extension tube is fixed with a locknut. In this way, infusion therapy can be started.

After placing the catheter in the blood vessel, cover the hub member and the extension tube together with the puncture part with a sealing dressing material to fix the connection part between the hub member and the extension tube and prevent bacteria from entering the puncture part. .. The extension tube is fixed to the epidermis in a state of being wound 2-3 times. This is because when the infusion line on the upstream side of the extension tube is caught on the bed fence or when the infusion line is intentionally removed, the extension tube reduces the pulling force applied to the puncture site and suppresses the catheter from coming off. Because.

When using the indwelling needle device, the above-mentioned puncture, indwelling, and fixing procedures are generally performed.

Japanese Unexamined Patent Publication No. 2006-296977 Japanese Unexamined Patent Publication No. 2014-136115 Japanese Unexamined Patent Publication No. 2016-182188 JP-A-2017-153658

By the way, after performing the fixing procedure of the hub member, the connecting portion between the hub member of the indwelling part and the extension tube may be located at a movable part of the body, for example, near the wrist. In this case, the bending motion of the wrist causes the connection between the hub member and the extension tube to directly interfere with the wrist, whereas the catheter is inserted into the blood vessel through the puncture site of the skin. Therefore, it is not directly affected by the bending of the wrist. For this reason, an event occurs in which the catheter bends from the vicinity of the connection portion of the hub member or the vicinity of the puncture portion of the skin. If the catheter bends, it will become obstructed, and there is a risk that medical procedures such as normal infusion therapy and blood pressure measurement that are performed through the indwelling catheter will not be possible.

Further, the connection portion between the hub member and the extension tube is generally composed of a hard member (plastic), and when this hard member is placed near the movable part of the body, the hub member and the extension tube are extended by body movement or bending. The connection with the tube may shift from the originally fixed position. On the other hand, the catheter is placed along the blood vessel and is not easily displaced. Therefore, the movements of the connecting portion and the catheter do not match, and the catheter made of a flexible soft member is forcibly bent, and as a result, the catheter may be occluded.

Further, when the connecting portion between the hub member and the extension tube is placed near the movable part of the body, the hub member must be fixed with a plurality of dressings so as not to shift. At this time, if an attempt is made to firmly fix the skin, the connecting portion made of a hard member is strongly pressed against the skin, resulting in a state in which the skin is strongly pressed. Since this compression is continued during the indwelling period, it may form compression marks and cause invasion.

Therefore, one end of the extension tube is connected to the hub member, a general female connector is provided at the other end of the extension tube, and the end of the infusion tube is connected to this female connector, and the hub member is female. It may be formed smaller than the connector. Then, if the hub member is fixed to the skin and the infusion tube is connected to the female connector, even if the hub member is fixed in the vicinity of the movable part of the body, it will follow the body movement and the bending motion of the movable part. Since the extension tube bends, it becomes difficult for a bending force to act on the catheter, and the occlusion of the catheter is suppressed. Further, since the hub member is smaller than the female connector, the contact area between the hub member and the skin is reduced, and the pressure on the skin by the hub member can be reduced.

That is, by providing the small hub member, the catheter is less likely to be occluded than before, and the invasiveness can be reduced. However, since the standards of the hub members so far are set by ISO (International Organization for Standardization) and JIS (Japanese Industrial Standards), they are sized to meet the standards and are downsized to below the standards. That wasn't considered at all.

Further, assuming that the hub member is miniaturized, it becomes difficult to push the hub member forward at the time of puncture. That is, when a metal needle and a catheter are punctured into a blood vessel, the hub member becomes unstable, the possibility that the catheter comes off from the puncture portion of the skin increases, and the puncture technique using a conventional grip component cannot be applied. However, it may be difficult to use.

The present invention has been made in view of this point, and an object thereof is an indwelling needle that makes it possible to apply a conventional puncture technique and is easy to use when miniaturizing a catheter hub member attached to a catheter. To provide the device.

In order to achieve the above object, in the present invention, the catheter hub member to which the catheter is connected is made smaller than the female connector made of hard resin to which the infusion tube or the like is connected, and between the catheter hub member and the female connector. A flexible extension tube is provided in the catheter to allow the relative displacement between the catheter hub member and the female connector, and the catheter hub member is directly pushed by the push operation member operated by the operator to push the catheter. I made it possible to push forward.

The first invention comprises an indwelling component having a catheter indwelled in a blood vessel, a catheter hub member attached to the catheter and formed with an in-hub flow path communicating with the proximal end of the catheter, and one end. Is a metal having an extension tube connected to the catheter hub member, a tubular female connector provided at the other end of the extension tube, and a sharpened portion inserted into the catheter and protruding from the tip of the catheter. In an indwelling needle device comprising a needle and a gripping component to which the metal needle is attached and gripped by an operator, the catheter hub member is formed smaller than the female connector and the extension tube is flexible. The gripping component is provided with a pushing operation member that abuts on the catheter hub member and pushes the catheter hub member, and a pair of holding the catheter hub member is sandwiched at the tip of the gripping component. It is characterized in that a holder portion that can be elastically deformed is provided .

According to this configuration, since the metal needle is attached to the gripping part gripped by the operator and the pushing operation member for pushing the catheter hub member is provided, the metal needle and the metal needle can be simply pushed by pushing the gripping part. The catheter hub member can be pushed forward at the same time, which allows the catheter to be placed in the blood vessel by a conventional procedure.

After indwelling the catheter, the catheter hub member is fixed to the skin, the extension tube is connected to the catheter hub member, and the infusion tube is connected to the female connector, for example, so that the infusion therapy can be started. At this time, the female connector connected to the infusion tube will be connected to the catheter hub member via the extension tube, and since this extension tube has flexibility, for example, the catheter hub near the movable part of the body. Even if the member is fixed, the extension tube bends so as to follow the body movement and the bending motion of the movable part. As a result, it becomes difficult for a bending force to act on the catheter, and the occlusion of the catheter is suppressed.

Further, since the catheter hub member is smaller than the female connector, the external force received by the body movement or the bending motion of the movable portion becomes small, and interference with the wrist or the like is less likely to occur.

Further, since the catheter hub member is smaller than the female connector, the contact area between the catheter hub member and the skin is reduced, and the pressure on the skin by the catheter hub member can be reduced.

In the second invention, the gripping part is formed in a hollow shape and extends in the pushing operation direction, and the pushing operation member is formed in a cylindrical shape to be inserted inside the gripping part. It is characterized in that it is slidably attached to the gripping component in the direction of the center line.

According to this configuration, after the catheter is placed in the blood vessel, the gripping member can be moved to the push operation member in the direction opposite to that at the time of puncture while the push operation member is fixed. The metal needle can be pulled out by moving the gripping part in the direction opposite to that at the time of puncturing.

In the third aspect of the invention, the needle base member is inserted into the push operation member and the needle base member extending in the center line direction of the push operation member is fixed to the base end portion of the metal needle. The side opposite to the fixed side of the metal needle protrudes from the base end portion of the push operation member and is fixed to the base end portion of the gripping component.

According to this configuration, since the metal needle is attached to the base end portion of the gripping part via the needle base member, the metal needle can be operated together with the catheter hub member by the gripping part.

In the fourth aspect of the invention, the tip portion of the push operation member protrudes from the tip portion of the grip component and has an enlarged shape portion that is radially enlarged as compared with the base end portion of the push operation member. The enlarged shape portion abuts on the catheter hub member.

According to this configuration, the enlarged shape portion provided at the tip of the push operation member pushes the catheter hub member, so that the posture of the catheter hub member is stabilized at the time of push.

A fifth aspect of the invention is characterized in that the tip end portion of the gripping component abuts on the enlarged shape portion.

According to this configuration, when the gripping component is pushed, the tip portion pushes the enlarged shape portion to push the catheter hub member forward. At this time, since the tip end portion of the gripping component is in contact with the enlarged shape portion, the force for pushing the gripping component is stably transmitted to the enlarged shape portion.

According to the sixth aspect of the present invention, the push operation member can slide with respect to the grip component until the intermediate portion in the center line direction of the push operation member reaches the needle removal completion position exposed from the tip end portion of the grip component. The push-pushing operation member is provided with a needle-pulling completion engaging portion that engages with the gripping component when the push-pushing operation member is in the needle-pulling complete position.

According to this configuration, after puncturing the metal needle and the catheter hub member and indwelling the catheter, the gripping part is moved in the direction opposite to that at the time of puncturing with respect to the pushing operation member while the pushing operation member is fixed. The metal needle can be pulled out by causing the needle to be pulled out, and the push operation member is in the position where the needle pulling is completed. When the push operation member reaches the needle removal completion position, the needle removal completion engaging portion engages with the gripping component, so that the push movement operation member is held at the needle removal completion position.

A seventh aspect of the invention is characterized in that the length of the push operation member is set so as to cover the metal needle up to the tip portion when the push operation member is in the needle removal completion position. ..

According to this configuration, after the needle removal is completed, the metal needle is held in a state of being covered up to the tip portion thereof by the push operation member, so that erroneous puncture of the metal needle is prevented.

Eighth invention is characterized in that one end of the extension tube is connected to the catheter hub member so as to extend in a direction intersecting the center line direction of the catheter.

According to this configuration, one end of the extension tube extends in a direction intersecting the center line direction of the catheter, which enhances convenience when the extension tube is fixed so as not to be located on the extension line of the center line of the catheter. ..

A ninth aspect of the invention is characterized in that one end of the extension tube is connected to the catheter hub member so as to extend toward the center line of the catheter.

According to this configuration, since one end of the extension tube extends toward the center line of the catheter, convenience is enhanced when the extension tube is to be arranged on the extension line of the center line of the catheter.

According to the first invention, the catheter hub member to which the catheter is connected is made smaller than the female connector to which the infusion tube is connected, for example, and a flexible extension tube is provided between the catheter hub member and the female connector. Therefore, even if the catheter and the catheter hub member are placed near the movable part of the body, the catheter is less likely to be occluded, and the catheter can be fixed without strongly pressing the skin, so that the invasiveness can be reduced. Then, since the metal needle is attached to the gripping part to be gripped by the operator and the pushing operation member for pushing the catheter hub member is provided, the metal needle and the catheter hub member can be pushed forward at the same time simply by pushing the gripping part. This allows the catheter to be indwelled in the blood vessel by a conventional procedure, resulting in an easy-to-use indwelling needle device.

According to the second invention, since the push operation member is slidably attached to the gripping component in the direction of the center line, the needle removal procedure of the metal needle can be easily performed.

According to the third invention, since the metal needle can be attached to the base end portion of the gripping part via the needle base member, the operability of the metal needle can be improved.

According to the fourth invention, since the enlarged shape portion of the tip portion of the push operation member is brought into contact with the catheter hub member, the posture of the catheter hub member can be stabilized at the time of push.

According to the fifth invention, since the tip end portion of the gripping component can be brought into contact with the enlarged shape portion, the force for pushing the gripping component can be stably transmitted to the enlarged shape portion.

According to the sixth invention, since the needle removal completion engaging portion that engages with the gripping component when the push movement operation member is in the needle removal completion position is provided, the push movement operation member does not move from the needle removal completion position. Can be held like this.

According to the seventh invention, since the metal needle can be covered up to the tip portion by the push operation member at the needle removal completion position, it is possible to prevent erroneous puncture by the metal needle.

According to the eighth invention, since one end of the extension tube extends in the direction intersecting the center line direction of the catheter, it is convenient when the extension tube is fixed so as not to be located on the extension line of the center line of the catheter. Can be enhanced.

According to the ninth invention, since one end of the extension tube extends toward the center line of the catheter, convenience can be enhanced when the extension tube is to be arranged on the extension line of the center line of the catheter.

It is a perspective view which shows the indwelling part, the extension tube, and the connector part of the indwelling needle device which concerns on Embodiment 1 of this invention. FIG. 1 is a view corresponding to FIG. 1 showing a state in which the connector component is removed from the catheter hub member. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 2 is a sectional view taken along line IV-IV in FIG. It is a perspective view which looked at the catheter hub member from the proximal end side. It is a perspective view which saw the connector component from the tip side. It is a perspective view which shows the state which the catheter hub member is attached to the gripping part. It is a top view which shows the state which the catheter hub member is attached to the gripping part. It is a side view which shows the state which the catheter hub member is attached to the gripping part. FIG. 8 is a cross-sectional view taken along the line X-X in FIG. 9 is a sectional view taken along line XI-XI in FIG. FIG. 7 is a view corresponding 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. 7 is a view corresponding to FIG. 7 showing a state in which the catheter hub member is detached from the gripping component. FIG. 11 is a view corresponding to FIG. 11 showing a state in which the catheter hub member is detached from the gripping component. It is a figure corresponding to FIG. 3 which concerns on Embodiment 2 of this invention. It is a figure corresponding to FIG. 3 which concerns on Embodiment 3 of this invention. It is a figure corresponding to FIG. 1 which concerns on Embodiment 4 of this invention. FIG. 2 is a view corresponding to FIG. 2 according to the fourth embodiment of the present invention. It is a top view of the connector component which concerns on Embodiment 4 of this invention. FIG. 3 is a plan view showing an indwelling part, an extension tube, and a connector part of the indwelling needle device according to the fifth embodiment of the present invention. It is sectional drawing which shows the indwelling part, the extension tube and the connector part of the indwelling needle device which concerns on Embodiment 5 of this invention. It is sectional drawing which shows the state which the metal needle is inserted into the catheter hub member and the indwelling catheter. It is a figure corresponding to FIG. 7 which concerns on Embodiment 5 of this invention. It is a figure corresponding to FIG. 10 which concerns on Embodiment 5 of this invention. FIG. 11 is a view corresponding to FIG. 11 according to the fifth embodiment of the present invention. FIG. 12 is a view corresponding to FIG. 12 according to the fifth embodiment of the present invention. FIG. 25 is a view corresponding to FIG. 25 showing a state after needle removal. FIG. 26 is a view corresponding to FIG. 26 showing a state after needle removal. It is a perspective view of the gripping part which concerns on Embodiment 5 of this invention. It is a perspective view of the push operation member which concerns on Embodiment 5 of this invention. It is a side view of the indwelling part which concerns on Embodiment 6 of this invention. It is a vertical sectional view of the indwelling part which concerns on Embodiment 6 of this invention. FIG. 33 is a view corresponding to FIG. 33 showing a state in which a metal needle is inserted into a catheter hub member and an indwelling catheter. It is a perspective view of the catheter hub member which concerns on Embodiment 6 of this invention. It is a vertical sectional view of the catheter hub member which concerns on Embodiment 6 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 essentially merely an example 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 the first embodiment of the present invention. This indwelling needle device 1 is used for indwelling an indwelling catheter 20 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 and measure the patient's blood pressure. Since various medical practices using the indwelling catheter 20 have been performed conventionally, detailed description thereof will be omitted.

(Structure 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 the like, and a needle base member 7. And a gripping component 8. The female connector 5 shown in FIGS. 1 and 2 is a tubular member having a luer taper that has been well known in the past, and although not shown, the male connector and the female connector 5 are connected by inserting a male connector and screwing a lock nut. You can connect to it.

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

As shown in FIG. 1, the infusion component 2, the extension tube 3, the connector component 4, and the female connector 5 enable infusion therapy, and during the infusion therapy, the metal needles shown in FIGS. 7 to 11 and the like can be infused. 6, the needle base member 7, and the gripping component 8 are unnecessary. On the other hand, from the puncture procedure to the indwelling procedure, the metal needle 6 shown in FIGS. 7 to 11 and the like, the needle base member 7, and the gripping component 8 are required, but the extension tube 3 shown in FIGS. 1 and 2 is used. , The connector component 4 and the female connector 5 are removed. The indwelling needle device 1 may be composed of an indwelling component 2, an extension tube 3, and a connector component 4, or may be composed of an indwelling component 2, an extension tube 3, a connector component 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 at the time of assembly or transportation. Further, the direction of the center line of the indwelling catheter 20 is substantially the same as the puncture direction during the puncture procedure.

(Structure of indwelling part 2)
As shown in FIGS. 3 and 4, the indwelling component 2 is an indwelling catheter 20 indwelled in a blood vessel and an in-hub flow path that is attached to the indwelling catheter 20 and communicates with the proximal end portion of the indwelling catheter 20. It has a catheter hub member 21 in which 21a is formed. The indwelling catheter 20 is made of a flexible material (soft material) and has a property of being flexible in a blood vessel without damaging the inner wall. The material constituting the indwelling catheter 20 is not particularly limited, but conventionally known materials can be used. The length of the indwelling catheter 20 is set so that the proximal end protrudes from the puncture portion of the skin with at least the distal end of the indwelling catheter 20 indwelling in the blood vessel of the patient. The tip of the indwelling catheter 20 is formed so as to have a tapered shape. In this embodiment, since the catheter is indwelled in the blood vessel of the patient, it is called an indwelling catheter 20, but it can also be simply called a catheter or an indwelling needle.

The catheter hub member 21 is made of a hard 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 standard female connector 5, and is characterized in that it is smaller than the case where it is designed according to the conventional ISO or JIS standards.

Specifically, the dimension of the indwelling catheter 20 in the catheter hub member 21 in the center line direction (puncture direction during the puncture procedure) is set shorter than the dimension in the center line direction of the female connector 5. Further, the dimension of the catheter hub member 21 in the direction intersecting 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 smaller than the maximum outer diameter of the female connector 5. Also, the maximum dimension of the catheter hub member 21 in the direction intersecting the center line direction of the indwelling catheter 20 is shortened. Further, 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. 5 is from 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.

By setting each dimension as described above, the catheter hub member 21 is miniaturized. For example, when the projected area in a plan view is compared between the catheter hub member 21 and the female connector 5 based on the state where the catheter hub member 21 and the female connector 5 are fixed to the skin, the catheter hub member 21 is smaller. There is.

A cylindrical tip tube portion 21b is formed on the tip end side of the catheter hub member 21 so as to project in the puncture direction during the puncture procedure. The tip tube portion 21b is located 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 tip cylinder 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 inside the distal end tubular portion 21b of the catheter hub member 21 over a predetermined length, and the outer periphery of the proximal end portion of the indwelling catheter 20 is inserted. The surface is fixed to the inner peripheral surface of the tip cylinder portion 21b in a liquidtight state. The proximal end of the indwelling catheter 20 reaches inward of the catheter hub member 21 rather than the distal tubular portion 21b.

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

As shown in FIG. 5, the catheter hub member 21 has a plate-shaped first hub member side engaging portion 22 and a second hub member side engaging portion 23 that engage with the 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 gap from each other, and the first hub member side engaging portion 22 and the second hub member side. An opening of the flow path 21a in the hub is located between the engaging portion 23 and the engaging portion 23. 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 from the side opposite to the side on which the insertion portion 41 is formed in the connector main body portion 40 described later. Extends to the surface on the base end side of. At the end of the first hub member side engaging portion 22, a first convex portion 22a projecting toward the second hub member side engaging portion 23 side is formed. At the end of the second hub member side engaging portion 23, a second convex portion 23a is formed so as to project toward the first hub member side engaging portion 22 side.

(Structure of extension tube 3)
The extension tube 3 is made of a member having the same flexibility as the indwelling catheter 20. One end of the extension tube 3 is connected to the in-hub flow path 21a 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 to be larger than the inner diameter of the indwelling catheter 20.

Further, the length of the extension tube 3 is set to be longer than the length of the indwelling catheter 20. As a result, as shown in FIG. 1 and the like, the extension tube 3 can be provided with a sufficient length to bend the middle portion in a ring shape. This ring-shaped bent portion may be provided with 2 to 3 rolls.

(Structure of connector component 4)
The connector component 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 component 4. The connector component 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 inserted into the in-hub flow path 21a of the catheter hub member 21. .. The connector main body 40 and the insertion portion 41 may be integrally molded, or the connector main body 40 and the insertion portion 41 may be formed of different members and then integrated. The insertion portion 41 is formed in a tubular shape protruding from the connector main body portion 40, and has a cylindrical shape in this embodiment. The connector main body 40 has a long flat shape 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 left-right directions, and the longitudinal directions of both are the same.

The insertion portion 41 is located at the center portion in the left-right direction on the surface of the connector main body portion 40 on the distal end side. The center line of the insertion portion 41 and the longitudinal direction of the connector main body portion 40 are substantially orthogonal to each other. 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 inner flow path 21a in the hub, and is equal to or slightly smaller than the inner flow path 21a in the hub. The insertion portion 41 is a portion for reducing the volume of the in-hub flow path 21a, and the wall thickness and length of the insertion portion 41 are such that the flow of chemicals and the like can be as much as possible while reducing the volume of the in-hub flow path 21a. It is set not to interfere.

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

Further, 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 open on one side surface in the left-right direction of the connector main body 40, 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 to the inner peripheral surface of the tube insertion hole 4b in a liquidtight state. The tube insertion hole 4b communicates with the connector inner flow path 4a inside the connector main body 40. Therefore, the flow path 4a in the connector 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 intersecting the centerline direction 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 of the extension tube 3 is arranged so as to be in the vertical direction in FIG. As a result, the protruding direction of the extension tube 3 from the connector component 4 and the protruding direction of the indwelling catheter 20 from the catheter hub member 21 intersect, and the two directions are different. Therefore, the center of the indwelling catheter 20. The 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 located 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 40a is formed in a portion of the connector main body 40 that is covered by the end portion of the first hub member side engaging portion 22 of the catheter hub member 21. The second recess 40b is formed in a portion of the connector main body 40 that is covered by the end portion 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 The elasticity of the hub member side engaging portion 23 widens the distance between the hub member side engaging portions 22 and 23, whereby between the first hub member side engaging portion 22 and the second hub member side engaging portion 23. It becomes possible to insert the connector main body 40 into the. After inserting 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 each the first concave portion. It fits into the 40a and the second recess 40b, and the connector component 4 and the catheter hub member 21 are integrated.

(Structure 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 to be longer than the length of the indwelling catheter 20, and in the state (initial state) before the operator performs the puncture procedure, the metal needle 6 is the indwelling catheter 20. The sharpened portion of the tip of the metal needle 6 protrudes from the tip of the indwelling catheter 20, and the proximal end of the metal needle 6 projects from the proximal end of the indwelling catheter 20. In this state, the center line of the metal needle 6 and the center line of the indwelling catheter 20 coincide with each other. 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, 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 grip component 8 described later, and has a rod shape extending in the center line direction of the push operation member 9. Nothing.

A tip 7a is provided at the tip of the needle base member 7, and the base end of the metal needle 6 is inserted into the tip 7a. As shown in FIG. 7 and the like, a protrusion 7b protruding in the radial direction is formed at the base end portion of the needle base member 7. Two protrusions 7b can be formed in a state where the needle base member 7 is spaced apart in the circumferential direction, and the number of the protrusions 7b can be arbitrarily set. The protrusion 7b is a portion for fixing the needle base member 7 to the base end portion of the grip component 8.

(Structure of grip component 8)
The gripping component 8 is a member for the operator to grip when performing a puncture procedure, and a metal needle 6 is attached via a needle base member 7. The material constituting the grip component 8 can be, for example, a hard resin material like the needle base member 7. The gripping component 8 is provided with a pushing operation member 9 for abutting on the catheter hub member 21 and pushing the catheter hub member 21. The details of the push operation member 9 will be described later. Here, the operator is a person who performs a puncture procedure, an indwelling procedure, a fixing procedure, or the like, and is, 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 thereof in the center line direction are open. As shown in FIG. 10, a slit 8a is formed in the grip component 8. The slit 8a extends from the tip end portion of the gripping component 8 toward the proximal end portion side to the intermediate portion in the center line direction of the gripping component 8.

As shown in FIG. 7 and the like, the tip side openings 8b and 8b are formed in the portion of the grip component 8 near the tip end. Further, the base end side openings 8c and 8c are formed in the portion of the grip component 8 near the base end portion. The protrusions 7b of the needle base member 7 are fitted into the base end side openings 8c and 8c from the inside of the grip component 8. Each protrusion 7b is engaged with the peripheral edge portion of the proximal end side opening 8c in a state of being fitted into the proximal end side opening 8c. As a result, the needle base member 7 and the grip component 8 are integrated, and the needle base member 7 does not move with respect to the grip component 8 in both the puncture direction and the circumferential direction.

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

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

(Structure 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 that is inserted into the grip component 8, and is slidably attached to the grip component 8 in the center line direction. In the initial state shown in FIGS. 7 to 9, the tip portion of the push operation member 9 is housed in the grip component 8 so as not to be exposed from the tip portion of the grip component 8. At this time, the base end portion of the push operation member 9 is also housed in the gripping component 8 so as not to be exposed from the base end portion of the gripping component 8. In a state where the push operation member 9 is housed inside the grip 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 contact portion 9a with which the operator's finger comes into contact. The finger contact portion 9a has a plate shape that protrudes from the slit 8a of the grip component 8 to the outside of the grip component 8 and extends in the direction of the center line of the grip component 8. The finger contact portion 9a is slidable on the outer surface of the grip component 8. The push operation member 9 can be stabilized by bringing the finger into contact with the finger contact portion 9a, and the grip 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 attached to the grip component 8 until the middle portion in the center line direction of the push operation member 9 reaches the needle removal completion position (shown in FIGS. 12 and 13) exposed from the tip end portion of the grip component 8. On the other hand, it is possible to slide. This slide operation can also be realized by moving the gripping component 8 in a state where 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 the state where the needle base member 7 is housed 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 fixed 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 done. Further, as shown in FIG. 10, in the initial state, the needle base member 7 is housed in the push operation member 9, and the metal needle 6 protrudes from the tip of the push operation member 9 and is inside the indwelling catheter 20. The inserted and sharp portion protrudes from the tip of the indwelling catheter 20.

The push operation member 9 is formed so that the ridge portion 9b projects outward from the push operation member 9. The ridge portion 9b extends linearly from the tip end portion of the push operation member 9 toward the base end portion side. The ridge portion 9b is formed so as to fit into the concave portion 8d formed on the inner peripheral surface of the grip component 8. As a result, the push operation member 9 is guided in the center line direction with respect to the grip component 8. Although not shown, even if a concave portion is formed on the outer peripheral surface of the push operation member 9 and a ridge portion is formed on the inner peripheral surface of the gripping component 8, the ridge portion is fitted into the concave portion. 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 grip component 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 grip component 8 in the center line direction is provided on the outer peripheral surface of the push operation member 9, and a guide portion is provided on the inner peripheral surface of the grip component 8 to guide the grip component 8. A guided portion to be guided can be provided. The shape of the guide portion and the guided portion may be a shape other than the ridge portion or the concave portion.

As shown in FIGS. 13 and 14, the tip end of the push operation member 9 is provided with a contact surface 9c with which the base end portion of the catheter hub member 21 abuts. The contact surface 9c extends in a direction orthogonal to the center line of the push operation member 9. Further, at the tip of the push operation member 9, an insertion piece portion 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 is projected. Has been done. 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 grip component 8 when the push operation member 9 is in the needle removal completion position (shown in FIGS. 12 and 13). Has been done. The needle pulling completion engaging portions 9e and 9e are composed of protrusions protruding outward in the radial direction from the outer peripheral surface of the base end portion of the push operation member 9. The needle pulling completion engaging 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 engaging portions 9e and 9e are fitted into the tip side opening 8b of the gripping component 8 and engage with the peripheral edge portion of the tip side opening 8b.

Further, the length of the push operation member 9 is set so as to cover the metal needle 6 up to the tip portion thereof when the push operation member 9 is in 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, so that erroneous puncture can be prevented. Further, when the push operation member 9 is in the needle removal completion position, the needle removal completion engaging portions 9e and 9e engage with the peripheral edge portion of the tip end side opening 8b of the grip component 8, so that the push operation member 9 Can be prevented from sliding in the direction of being accommodated inside the grip component 8, and safety can be enhanced.

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

When starting the puncture procedure, the operator first holds the gripping part 8 and abuts the finger on the finger contact portion 9a of the push operation member 9, and puts the sharp portion of the metal needle 6 on the puncture portion of the skin. Sting. Then, when the gripping component 8 is pushed in the puncturing direction of the indwelling catheter 20 as it is, the force in the puncturing direction is transmitted to the catheter hub member 21 via the pushing operation member 9, thereby pushing the catheter hub member 21. The push 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. While the indwelling catheter 20 and the metal needle 6 are inserted, since the gripping component 8 and the pushing operation member 9 are made of hard resin, deformation of the portion 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 inserting the indwelling catheter 20 and the metal needle 6, when the operator visually recognizes the backflow of blood, the metal needle 6 and the indwelling catheter 20 are further slightly inserted. This is to ensure that the indwelling catheter 20 is 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 can be reliably inserted into the blood vessel, the metal with the indwelling catheter 20 indwelled in the blood vessel is made of metal. It is necessary to pull out the needle 6 from the indwelling catheter 20. When performing the procedure (needle removal) for pulling out the metal needle 6 from the indwelling catheter 20, the operator holds the push operation member 9 with the finger in contact with the finger contact portion 9a of the push operation member 9. After fixing, the gripping part 8 is slid in the direction opposite to the puncture direction. At this time, since the grip component 8 is guided in the direction of the center line of the push operation member 9, it can be easily slid in a desired direction. Since the grip component 8 and the needle base member 7 are integrated, the metal needle 6 can be pulled out from the body by sliding the grip component 8 in the direction opposite to the puncture direction. At this time, the holder portions 8e and 8e of the grip component 8 are elastically deformed, and the catheter hub member 21 is detached from the tip portion of the grip component 8. Since the catheter hub member 21 is only in contact with the tip 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 back through the indwelling catheter 20 and flows into the in-hub flow path 21a of the catheter hub member 21. After confirming this, the connector main body 40 of the connector component 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 is inserted. 41 is inserted into the hub inner flow path 21a of the catheter hub member 21. At this time, blood is filled in the hub inner flow path 21a so that air does not enter, but by inserting the insertion portion 41 into the hub inner flow path 21a, the volume integral of the insertion portion 41 and the hub inflow flow. The volume of the passage 21a will be reduced, and thus the amount of blood required to fill the in-hub flow path 21a will be reduced. Further, since the insertion portion 41 has a cylindrical shape, it can be reliably connected to the hub inner flow path 21a by inserting it into the hub inner flow path 21a.

After the indwelling catheter 20 is indwelled, the catheter hub member 21 is fixed to the skin using a dressing member or the like (not shown), and 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 invading from the puncture portion of the skin. In this embodiment, since one end of the catheter hub member 21 and the extension tube 3 is 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. The parts to be fixed by the dressing member may be a plurality of 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 is applied.

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 measuring the blood pressure of a patient.

Further, while the size of the female connector 5 conforms to the standard, the dimension of the catheter hub member 21 along the center line direction of the indwelling catheter 20 is made shorter than the dimension along the center line direction of the female connector 5. The catheter hub member 21 is sufficiently small. As the catheter hub member 21 becomes smaller, the catheter hub member 21 is less likely to be affected by body movements and bending movements of movable parts while being fixed to the skin. Further, 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 in the radial direction of the female connector 5, the catheter hub member 21 moves and bends the movable part. It becomes even less susceptible to the effects of.

(Action and effect of the 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 component 4 is inserted into the in-hub flow path 21a. When the insertion portion 41 is inserted into the hub inner flow path 21a, the volume of the hub inner flow path 21a is reduced by the volume of the insertion portion 41. Therefore, even if the amount of blood flowing back into the hub inner flow path 21a is small, the hub inner flow path 21a is filled with blood, so that the filling amount of blood can be small. Therefore, especially in the case of a low birth weight infant, the decrease in blood volume in the body is suppressed, the time for filling the hub inner flow path 21a with blood is shortened, and the risk of infectious disease is further reduced.

Further, the connector component 4 and the catheter hub member 21 are loosened by the first hub member side engaging portion 22 and the second hub member side engaging portion 23 of the catheter hub member 21 sandwiching the connector main body portion 40. It is integrated so that it does not connect. Then, since the first hub member side engaging portion 22 and the second hub member side engaging portion 23 engage from the side opposite to the side where the insertion portion 41 is formed in the connector main body portion 40, the insertion portion 41 is a hub. It becomes difficult to get out of the inner flow path 21a. Further, 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 main body 40, respectively, the insertion portion 41 is more than the inner flow path 21a in the hub. It becomes even more difficult to pull out.

Further, since the metal needle 6 is attached to the grip component 8 gripped by the operator and the push operation member 9 for pushing the catheter hub member 21 is provided, the metal needle is simply pushed by pushing the grip component 8. 6 and the catheter hub member 21 can be pushed forward at the same time, whereby the indwelling catheter 20 can be indwelled in the blood vessel by a conventional procedure.

After the indwelling catheter 20 is indwelled, the female connector 5 connected to the infusion tube will be connected to the catheter hub member 21 via the extension tube 3, and the extension tube 3 has flexibility, for example. Even if the catheter hub member 21 is fixed in the vicinity of the movable portion of the body, the extension tube 3 bends so as to follow the body movement and the bending motion of the movable portion. As a result, it becomes difficult for a bending force to act on the indwelling catheter 20, and the occlusion of the indwelling catheter 20 is suppressed.

Further, since the catheter hub member 21 is smaller than the female connector 5, the external force received by the body movement or the bending motion of the movable portion becomes small, and interference with the wrist or the like is less likely to occur.

Further, 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 pressure on the skin by the catheter hub member 21 can be reduced. This makes it possible to further reduce the invasiveness.

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

That is, in the second embodiment, an elastic material is provided between the opening peripheral portion of the inner flow path 4a in the connector at the tip of the insertion portion 41 of the connector component 4 in the insertion direction and the inner surface of the inner flow path 21a in the hub of the catheter hub member 21. The sealing material S made of the material S is provided so as to come into contact with the opening peripheral edge portion and the inner surface thereof. The sealing material S can be made of, for example, silicon rubber or the like, and can be an O-ring. The sealing material S is previously inserted into the in-hub flow path 21a of the catheter hub member 21, and then the insertion portion 41 of the connector component 4 is inserted into the in-hub flow path 21a of the catheter hub member 21 to provide a sealing property. Can be enhanced.

Also in this embodiment 2, the same action and effect as that of the first embodiment can be obtained.

(Embodiment 3)
FIG. 17 shows an indwelling part 2, an extension tube 3, and a connector part 4 according to the third embodiment 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 to be inserted inside the insertion portion 41 is provided, and the other parts are the same. Since it is the same as the first embodiment, the same parts as those of the first embodiment are designated by the same reference numerals, the description thereof will be 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 21d to be inserted into the insertion portion 41 of the connector component 4 is provided on the inner surface of the hub inner flow path 21a of the catheter hub member 21. When the insertion portion 41 of the connector component 4 is inserted into the in-hub flow path 21a of the catheter hub member 21, the insertion tube portion 21d is inserted inside the insertion portion 41, so that between the catheter hub member and the 21 connector component 4. The sealing property can be further improved.

Also in this embodiment 3, the same action and effect as that of the first embodiment can be obtained.

(Embodiment 4)
18 to 20 show an indwelling part 2, an extension tube 3, a connector part 4, and a female connector 5 according to the fourth embodiment of the present invention. This embodiment 4 is different from the first embodiment in that the connector main body 40 is provided with a connector-side engaging portion that engages with the catheter hub member 21, and the other parts are the same as those of the first embodiment. Therefore, hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be 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 is engaged with the first connector-side engaging portion 42 and the second connector-side engaging portion arranged so as to sandwich the catheter hub member 21 from the left-right direction. It has a joint 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 left-right side surface of the catheter hub member 21. At the end of the first connector-side engaging portion 42, a convex portion 42a protruding toward the second connector-side engaging portion 43 is formed. At the end of the second connector-side engaging portion 43, a convex portion 43a projecting toward the first connector-side engaging portion 42 is formed.

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 recesses 21e formed on the left-right side surfaces of the catheter hub member 21 (only one of them in FIG. 19). It is designed to engage by fitting into (shown). As a result, the connector component 4 and the catheter hub member 21 are integrated so as not to rattle.

Also in this embodiment 4, the same action and effect as that of the first embodiment can be obtained.

(Embodiment 5)
21 to 31 show the indwelling part 2, the extension tube 3, and the female connector 5 according to the fifth embodiment of the present invention. This embodiment 5 is different from the first embodiment in that the extension tube 3 is directly connected to the catheter hub member 21, and other parts are the same as those of the first embodiment. The same parts are designated by the same reference numerals, explanations are omitted, and different parts will be described in detail.

As shown in FIGS. 21 to 23, the connector component is not provided in the fifth embodiment, and one end of the extension tube 3 is directly connected to the catheter hub member 21 without a connector member. That is, on one side of the catheter hub member 21 in the left-right direction, a connecting cylinder portion 24 for connecting one end portion of the extension tube 3 is provided so as to project. As shown in FIGS. 22 and 23, the inside of the connecting cylinder portion 24 communicates with the in-hub flow path 21a. One end of the extension tube 3 is inserted into the connection cylinder portion 24 over a predetermined length, and the outer peripheral surface of the one end portion of the extension tube 3 is fixed to the inner peripheral surface of the connection cylinder portion 24 in a liquidtight state. Has been done.

The in-hub flow path 21a of the catheter hub member 21 extends to the end (base end) opposite to the side to which the indwelling catheter 20 is connected, and the base end in the hub inner flow path 21a is an elastic material. It is closed by a valve body 25 made of. The valve body 25 is fixed to the catheter hub member 21 by a fixing member 26 made of hard resin. The valve body 25 can be punctured with a metal needle 6. When the metal needle 6 is pulled out from the valve body 25, the shape of the valve body 25 is restored and the sealed state is established.

As shown in FIG. 23, the fixing member 26 is formed with a metal needle insertion hole 26a into which the metal needle 6 can be inserted. The metal needle insertion hole 26a is located on an extension of the center line of the indwelling catheter 20 and can be formed in a substantially circular shape. The catheter hub member 21 of the fifth embodiment is also formed to be smaller than the standard female connector 5, and is characterized in that it is smaller than the case of being designed according to the conventional ISO or JIS standards.

As shown in FIGS. 24 to 26, in the initial state, the tip portion of the push operation member 9 is formed so as to protrude from the tip portion of the grip component 8. The tip portion of the push operation member 9 is formed so as to project, and has an enlarged shape that is enlarged in the radial direction as compared with the base end portion (the portion accommodated in the grip component 8) of the push operation member 9. It has a part 91. The left-right dimension of the enlarged shape portion 91 is set longer than the left-right dimension of the tip portion of the grip component 8. The distal end surface of the enlarged shape portion 91 comes into contact with the proximal end portion of the catheter hub member 21.

Further, the tip portion of the grip component 8 abuts on the enlarged shape portion 91. As a result, the force in the puncture direction with respect to the grip component 8 is transmitted to the enlarged shape portion 91 and acts on the catheter hub member 21 via the push operation member 9.

Also in this embodiment 5, the same action and effect as that of the first embodiment can be obtained.

(Embodiment 6)
32 to 35 show the indwelling part 2, the extension tube 3, and the female connector 5 according to the sixth embodiment of the present invention. This embodiment 6 is different from the first embodiment in that the extension tube 3 is directly connected to the catheter hub member 21, and other parts are the same as those of the first embodiment. The same parts are designated by the same reference numerals, explanations are omitted, and different parts will be described in detail.

As shown in FIGS. 32 and 33, the connector component is not provided in the sixth embodiment, and one end of the extension tube 3 is directly connected to the catheter hub member 21 without a connector member. That is, a connecting cylinder portion 27 for connecting one end portion of the extension tube 3 is provided so as to project from the proximal end side of the catheter hub member 21. The inside of the connection cylinder portion 27 communicates with the flow path 21a in the hub. The connection cylinder portion 27 is inserted into one end of the extension tube 3 over a predetermined length, and the inner peripheral surface of one end of the extension tube 3 is in a liquidtight state with respect to the outer peripheral surface of the connection cylinder portion 24. It is stuck. As a result, one end of the extension tube 3 is connected to the catheter hub member 21 so as to extend in the direction of the center line of the indwelling catheter 20. Further, the outer peripheral surface of the catheter hub member 21 is provided with an outer plate portion 28 so as to be separated from the outer peripheral surface of the connecting cylinder portion 27. A gap is formed between the outer plate portion 28 and the connecting cylinder portion 27.

FIG. 34 shows a state in which the metal needle 6 is inserted into the indwelling catheter 20. Although not shown in FIG. 34, the tip portion of the push operation member is formed so as to be insertable between the outer plate portion 28 of the catheter hub member 21 and the connection cylinder portion 27, and the tip portion of the push operation member is used. The catheter hub member 21 can be pushed and operated. Further, the gripping component may be formed long enough to accommodate the extension tube 3 and the female connector 5.

Also in this embodiment 6, the same action and effect as that of the first embodiment can be obtained.

(Other embodiments)
The above embodiments are merely exemplary in all respects and should not be construed in a limited way. Further, all modifications and modifications belonging to the equivalent scope of the claims are within the scope of the present invention.

For example, in the fourth embodiment, the sealing material of the second embodiment and the insertion cylinder portion of the third embodiment can be provided.

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 In-connector flow path 8 Grip part 9 Pushing operation member 9e Needle removal completed Engagement part 20 Indwelling catheter 21 Cauter 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 body part 41 Inserting part 42 1st connector side engaging part 43 2nd connector side engaging part 91 Enlarged shape part S Sealing material

Claims (9)

An indwelling component having a catheter indwelled in a blood vessel and a catheter hub member attached to the catheter and having an in-hub flow path communicating with the proximal end of the catheter.
An extension tube whose one end is connected to the catheter hub member,
A cylindrical female connector provided at the other end of the extension tube,
A metal needle that is inserted into the catheter and has a sharpened portion that protrudes from the tip of the catheter.
In the indwelling needle device to which the metal needle is attached and the gripping component to be gripped by the operator is provided.
The catheter hub member is formed smaller than the female connector and is formed.
The extension tube is flexible and
The gripping component is provided with a pushing operation member that abuts on the catheter hub member and pushes the catheter hub member .
An indwelling needle device characterized in that a pair of elastically deformable holder portions for sandwiching the catheter hub member is provided at the tip end portion of the gripping component . In the indwelling needle device according to claim 1,
The gripping component is formed in a hollow shape and extends in the pushing operation direction.
The push operation member is an indwelling needle device that is formed in a cylindrical shape that is inserted into the grip component and is slidably attached to the grip component in the direction of the center line. In the indwelling needle device according to claim 2,
A needle base member that is inserted into the push operation member and extends in the center line direction of the push operation member is fixed to the base end portion of the metal needle.
The indwelling needle device characterized in that the side opposite to the fixed side of the metal needle in the needle base member protrudes from the base end portion of the push operation member and is fixed to the base end portion of the gripping part. .. In the indwelling needle device according to claim 2 or 3.
The tip portion of the push operation member has an enlarged shape portion that protrudes from the tip portion of the grip component and is radially enlarged as compared with the base end portion of the push operation member.
An indwelling needle device characterized in that the enlarged shape portion abuts on the catheter hub member. In the indwelling needle device according to claim 4,
An indwelling needle device characterized in that the tip portion of the gripping component abuts on the enlarged shape portion. The indwelling needle device according to any one of claims 2 to 5.
The push operation member is slidable with respect to the grip component until the intermediate portion in the center line direction of the push operation member reaches the needle removal completion position exposed from the tip end portion of the grip component.
The indwelling needle device is characterized in that the push operation member is provided with a needle removal completion engaging portion that engages with the gripping component when the push operation member is in the needle removal completion position. In the indwelling needle device according to claim 6,
The indwelling needle device is characterized in that the length of the push operation member is set so as to cover the metal needle up to the tip portion when the push operation member is in the needle removal completion position. In the indwelling needle device according to any one of claims 1 to 7.
An indwelling needle device, wherein one end of the extension tube is connected to the catheter hub member so as to extend in a direction intersecting the center line direction of the catheter. In the indwelling needle device according to any one of claims 1 to 7.
An indwelling needle device, characterized in that one end of the extension tube is connected to the catheter hub member so as to extend in the direction of the center line of the catheter.

Images