JP2000176009A - Hole forming tool for indwelling needle puncture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely retain an indwelling needle by forming at least the tip part to be inserted to a human body of a hollow body having a cavity capable of inserting a guide wire by use of a hardly bendable or crushable tube body, and attachably and detachably mounting a closing tool for closing the opening part of the cavity on the base end thereof. SOLUTION: This indwelling needle puncturing hole forming tool 1 for forming a puncturing position for an indwelling needle is formed of a tube body 11, a hub 12, a clamp tube 13, a connector 14 and a closing tool 15. The tube body 11 has an inside diameter capable of inserting a guide wire with excellent living body adaptability, and formed so as to have rigidity to the extent that it is hardly bendable or crushable. The closing tool 15 is mounted on the connector 14 after pulling out the guide wire so as to close the opening part 141 of the connector 14 communicating with the cavity of the tube body 11, and, for example, an injection plug consisting of a cap body 152 having an injection needle piercing hole 151 and a rubber film 153 mounted within the cap body 152 is preferably used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indwelling needle puncturing hole forming tool for forming a puncturing site of an indwelling needle to be indwelled during hemodialysis.

[0002]

2. Description of the Related Art There are many cases where hemodialysis is performed at home overseas, and home hemodialysis is being studied in Japan. In home hemodialysis, it is difficult for a doctor to visit each home, so the patient needs to puncture the indwelling needle by himself. For example, indwelling needles conventionally used include a winged needle in which a wing for fixing a human body is attached to a metal needle, and an indwelling needle formed of a metal inner needle and a plastic cannula.

[0003]

However, the self-puncture performed using the indwelling needle as described above involves puncture pain and puncture caused by immature operation, and is very difficult. there were. An object of the present invention is to provide an indwelling needle puncture hole forming device for forming a puncture site in which an indwelling needle can be securely placed without puncturing while minimizing puncture pain. I do.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above-mentioned object, and as a result, a tube body having such a rigidity that it is not easily bent or crushed has been placed on a human body for several days. By indwelling and forming an indwelling needle insertion passage (straight hole) from the skin surface to the blood vessel, and by inserting the indwelling needle through this indwelling needle insertion passage, puncture pain is minimized and erroneous puncture is prevented. The present inventors have found that the indwelling needle can be indwelled reliably, and have reached the present invention. That is, the present invention is a hollow body having a distal end and a proximal end, and having a lumen through which a guide wire can be inserted, in which at least a distal end portion to be inserted into a human body is not easily bent or crushed. A hole forming device for indwelling needle puncturing, which is formed of a body, and has a proximal end provided with a closing device for removably closing the opening of the lumen. Here, the inner diameter of the tube body is preferably 0.2 to 1.7 mm.
In addition, it is preferable that a clamp tube for preventing ejection of blood at the time of removal of the guide wire is provided on the proximal end side of the tube body.

[0005]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the indwelling needle puncturing hole forming device of the present invention, and FIG. 2 is an explanatory diagram showing a flow until the indwelling needle puncturing hole forming device of the present invention is indwelled in a human body. .

[0006] A hole forming device 1 for indwelling needle puncture shown in FIG.
Are, in order from the distal end side, a tube body 11 that is not easily bent or crushed, and a hub 1 provided at a base end of the tube body 11.
2 and a clamp tube 13 connected to the hub 12
And a connector 14 connected to the clamp tube 13, and a closure 15 detachably attachable to the connector 14.

The tube body 11 has an inner diameter through which a guide wire can be inserted. The inner diameter is determined according to the outer diameter (usually 0.2 to 1.3 mm) of the guide wire to be used. Is 0.2 to 1.7 mm. In addition, the outer diameter of the tube body 11 is usually set to 1. in accordance with the outer diameter (usually 16 to 18 gauge) of the indwelling dialysis needle to be used.
3 to 1.8 mm. Furthermore, since the tube body 11 is left in the human body for several days, it is excellent in biocompatibility and has such a rigidity that it is not easily bent or crushed. As a material of such a tube body 11,
Metals such as stainless steel, or synthetic resins such as polycarbonate, polypropylene, and polytetrafluoroethylene can be preferably used. In particular, in the case of a synthetic resin, a certain thickness is required in order not to be easily bent or crushed, and specifically, a thickness of 0.5 to 0.8 mm is preferable. The tip of the tube body 11 is preferably not sharp so as not to damage the blood vessel.

The hub 12 and the connector 14 are made of, for example, a hard synthetic resin such as polypropylene or polycarbonate, similarly to a general indwelling needle for dialysis. Further, the clamp tube 13 is for holding the portion by hand at the moment when the guide wire is pulled out to prevent ejection of blood, and is made of an elastic material such as silicone rubber or natural rubber. When the indwelling needle puncture hole forming device 1 includes the clamp tube 13, the hub 12 and the connector 14 are usually provided at both ends of the clamp tube 13 as shown in FIG. 1. The clamp tube 13 and the connector 1
The shape of the hub 12 is not limited to the shape including the four or the like, and the hub 12 may function as the connector 14 as it is.

The closing device 15 is attached to the connector 14 after the guide wire 3 has been removed, and closes the opening 141 of the connector 14 communicating with the lumen of the tube body 11. As the closing device 15, for example, as shown in FIG. 1, an injection plug (Nipro) composed of a synthetic resin cap body 152 having an injection needle penetration hole 151 and a rubber film 153 loaded inside the cap body 152. (Trade name of a rubber film loading cap manufactured by the company) can be used. This is pierced with a rubber needle 153 with a syringe needle to inject an anticoagulant such as heparin, and then withdrawing the needle,
The elasticity of the rubber film 153 closes the injection needle piercing portion. The closing device 15 is not limited to a shape like an injection plug, but may be a cap. In this case, it is necessary to connect a syringe and inject an anticoagulant before attaching the cap.

Next, a flow until the indwelling needle puncture hole forming device of the present invention is indwelled in a human body will be described with reference to FIG.
First, after a general dialysis indwelling needle 2 composed of an inner needle 21 and an outer needle 22 is punctured into the shunt portion, the inner needle 21 is removed, and the outer needle 22 is indwelled in a blood vessel. Next, after inserting the guide wire 3 into the outer needle 22, the outer needle 22 is removed.
Here, if necessary, after removing the outer needle 22, a dilator (not shown) is inserted along the guide wire 3,
The hole may be enlarged. Next, the indwelling needle puncture hole forming device 1 from which the closure device 15 has been removed is introduced into the blood vessel along the guide wire 3 and is indwelled. Guide wire 3
Then, the closure 15 is attached to the connector 14. Finally, an anticoagulant such as heparin is filled into the lumen of the indwelling needle puncture hole forming tool 1 with a syringe or the like. Further, if necessary, the indwelling needle puncturing hole forming tool 1 may be fixed to a human body with a fixing tool 4 as shown in the figure. This fixture 4
It is formed at an appropriate angle (approximately 10 to 25 degrees), and preferably has a groove having a hub 12 shape formed on a slope. As the material, an elastic material such as silicone rubber, natural rubber, and elastomer is suitable.

When the indwelling needle puncture hole forming device thus placed is removed after a lapse of several days, an indwelling needle insertion passage (straight hole) is formed from the skin surface of the human body to the blood vessel. The straight hole is closed by coagulated or semi-coagulated blood, and a scab is formed on the skin surface. Since the straight hole is formed, it is possible to use a needle (Dul needle) whose tip is not sharp as an indwelling needle for dialysis. During hemodialysis,
Since only the dull needle is inserted into the straight hole, there is no puncture pain as in the related art, and the problem of erroneous puncture such as piercing a blood vessel or puncturing a part other than the blood vessel is eliminated.

[0012]

As described above, according to the present invention, a straight hole serving as a puncture site of an indwelling dialysis needle can be formed in the skin of a human body, so that puncture of the skin during dialysis can be prevented. Pain can be minimized. In addition, according to the present invention, a needle with a sharp tip (Dal needle) can be used as an indwelling needle for dialysis. Since this Dal needle is only inserted along a straight hole,
It can be reliably placed in the target blood vessel without puncturing by mistake.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an indwelling needle puncture hole forming device of the present invention.

FIG. 2 is an explanatory view showing a flow until the indwelling needle puncture hole forming device of the present invention is indwelled in a human body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indwelling needle puncture hole forming tool 11 Tube body 12 Hub 13 Clamp tube 14 Connector 141 Opening 15 Closing tool 151 Injection needle penetration hole 152 Cap body 153 Rubber film

Claims (3)

[Claims] 1. A tube having a distal end and a proximal end, and having a lumen through which a guide wire can be inserted, wherein at least a distal end portion to be inserted into a human body is not easily bent or crushed. A hole forming device for indwelling needle puncture, which is formed of a body, and has a base for removably attaching a closure for closing the opening of the lumen. 2. The hole forming tool for indwelling needle puncturing according to claim 1, wherein the inner diameter of the tube body is 0.2 to 1.7 mm. 3. The hole forming device for indwelling needle puncturing according to claim 1, wherein a clamp tube is provided on a base end side of the tube body.