JP2000217925A - Indwelling puncture needle with wing having branching part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To be extremely safe for user who dose puncture, prevent damaging of blood vessel internal wall and the like, do re-puncture easily, and use with ease. SOLUTION: The indwelling puncture needle with wing 1 has a teflon (polytetrafluoroethylene) needle 2 on the front part of main body 11, an opening part on the rear end 12. A metallic needle 3 is stored in the hollow of the teflon needle 2. Then, the main body 11 has a branching pipe 5. The branching pipe 5 is fitted at the fitting part 12 of the lower part of main body to connect to the flow passage of main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bifurcation which is extremely safe for an operator (user) performing a puncture operation and which can prevent damage to the inner wall of a blood vessel when left in a blood vessel for a long time. The present invention relates to a winged indwelling puncture needle having a wing.

[0002]

2. Description of the Related Art Conventionally, dialysis needles used in dialysis therapy are roughly classified into two types, one of which is an indwelling needle in which a Teflon needle is indwelled. The inner cylinder needle is inserted and arranged, and when inserting it into a blood vessel, insert it while inserting the inner cylinder needle into the outer cylinder needle, cut the skin and blood vessel wall with the metal needle that is the inner cylinder needle, and cut the distal end. The Teflon needle is introduced into the blood vessel, and then the Teflon needle, which is the outer cylinder needle, is left as it is, and only the metal needle, which is the inner cylinder needle, is removed, and the Teflon needle is left in the blood vessel.

The other dialysis needle is a winged indwelling needle,
Normal AVF (arterial-venous-fis)
tula). This AVF is composed of a metal needle that also serves as a puncture needle and an indwelling needle, and such an indwelling needle is to be indwelled in a blood vessel for a long time. For example, in dialysis therapy, a treatment time of about 4 to 5 hours is required. It is necessary. The indwelling needle used for this treatment uses metal,
Moreover, since the tip of the puncture needle has a sharp blade-like shape, it is painful for the patient himself to keep the punctured arm constant because of the long treatment time when placed in the patient's blood vessel Not only that, the sharp tip may cause the patient to move his arm or move the cutting edge due to the pulsation of the blood pump, sometimes damaging the inner wall of the blood vessel and causing bleeding due to damage.

In general, the puncture needle for dialysis used in the above dialysis treatment uses a metal needle as an inner needle of the Teflon needle for the indwelling needle. That is, as the Teflon needle, a metal needle serving as a guide for cutting the skin and inserting it into the blood vessel is used as the inner cylinder needle, and after puncturing, pull out the inner cylinder needle from the Teflon needle which is the outer cylinder needle and discard the inner cylinder needle. . At this time, when removing the inner needle from the outer needle, the operator should carefully press the distal end of the outer needle inserted in the blood vessel with a finger or the like to remove the inner needle from the outer needle needle. Must.

[0005] Furthermore, for this compression action, patients undergoing dialysis treatment for a long period of time have been subjected to angioplasty for turning the subcutaneous vein of the arm into an artery. For this reason, the act of suppressing arterialized blood vessels from above the skin is quite difficult for an unskilled operator. In addition, the arterialized blood vessels of patients receiving long-term treatment are exaggerated, making this difficult.

[0006] Once this has been done, the shunt distal end of the extracorporeal circuit must be connected to the indwelling needle to begin treatment. The above-mentioned blood pressure cessation action or the vinyl chloride tube or silicone tube constructed on the indwelling needle is sandwiched between forceps or the like and connected to an extracorporeal circuit so as not to bleed from the indwelling needle, but this act also eliminates complicated actions, Some facilities use AVF as described above.

[0007]

However, in the case of using a winged indwelling needle made of a metal needle which also serves as a puncture needle and an indwelling needle as an outer cylindrical needle as described above, the treatment is particularly long-term. As the patient moves his arm or the blade moves due to the pulsation of the blood pump, it sometimes damages the inner wall of the blood vessel and causes bleeding due to damage,
How to minimize the damage to blood vessels is the key to smoothly performing this treatment.

After the winged indwelling needle is punctured, the inner cylinder needle is removed from the Teflon needle which is the outer cylinder needle, and the inner cylinder needle is discarded. Stinging was not a rare problem. Further, when the inner needle is removed from the outer needle, the operator presses the distal end of the outer needle inserted into the blood vessel with a finger or the like.However, if this blood vessel pressing technique is not sufficient, it may cause bleeding and requires skill. There is a problem. Furthermore, the suppression of arterialized blood vessels from above the skin and the arterialized blood vessels of patients undergoing long-term treatment make it difficult for unskilled operators. Furthermore, when a conventional winged indwelling needle is used, blood draw and return become poor during the treatment of puncturing the blood vessel and during the treatment, and the inner cylinder needle is inserted again into the Teflon needle, which is the outer cylinder needle, to be in an appropriate position. The indwelling is performed on a daily basis, and it is desirable that the indwelling needle be capable of easily performing the re-puncture operation.

Therefore, the present invention and the like have examined the above problems in more detail. As a result, the present invention is extremely safe for an operator (user) performing a puncturing operation, and when placed in a blood vessel for a long period of time, the inner wall of the blood vessel and the like can be used. The present inventor has found that a winged indwelling puncture needle that can prevent damage to the wing and that is easy to use can be obtained by the configuration described later, and has accomplished the present invention. Therefore, the problem to be solved by the present invention is extremely safe for an operator (user) performing a puncture action, and can prevent damage to the inner wall of a blood vessel when the blood vessel is left in a blood vessel for a long time. An object of the present invention is to provide a winged indwelling puncture needle that can easily perform a re-puncture operation and is extremely easy to use.

[0010]

The above objects of the present invention are achieved by the following inventions.

(1) A main body portion having a flexible outer needle fixed to the outer needle fixing portion, having a branch pipe behind the fixing portion, and having a liquid stop valve at an opening at the rear end of the fixing portion. When,
A tubular body having a puncture inner tubular needle at one end, and having a sealing means that can be opened and closed at an opening at the rear end, the tubular body having the inner tubular needle is inserted into the main body so as to be able to advance and retreat, and A winged indwelling puncture needle having a branch portion, wherein the wing indwelling needle is configured to protrude from the tip of the outer cylindrical needle so as to be able to protrude and retract. (2) The indwelling puncture needle with a wing according to claim 1, wherein the cylindrical body having the puncture inner cylindrical needle is provided with a cylindrical protective cap so as to be slidable. (3) The blade having a branch portion according to claim 1 or 2, wherein the liquid stop valve comprises a ring-shaped elastic member or a liquid stop member having a function of clamping a tube provided in the main body. Indwelling puncture needle. (4) The indwelling puncture needle with a wing according to any one of claims 1 to 3, wherein the sealing means that can be opened and closed is a screw-shaped cap. (5) The indwelling puncture needle having a wing according to any one of claims 1 to 4, wherein the outer cylinder needle is a Teflon needle.

The winged indwelling puncture needle having a branch portion according to the present invention has an outer cylinder needle fixed to an outer cylinder needle fixing portion, has a branch pipe behind the fixing portion, and has an opening at the rear end of the fixing portion. A main body having a liquid stop valve, and a cylindrical body having a puncture inner cylindrical needle at one end and having a sealing means that can be opened and closed at an opening at a rear end, wherein the cylindrical body having the inner cylindrical needle is It is inserted into the main body so as to be able to move forward and backward, and is configured to protrude from the tip of the outer cylinder needle so as to be able to protrude and retract, and since the outer cylinder needle is made of a flexible material, it can be inserted into a blood vessel for a long time. The indwelling can also prevent the inner wall of the blood vessel from being damaged or torn. Further, in the present invention, since the main body has a ring-shaped elastic member as a liquid stop valve or a liquid stopping member having a function of clamping a tube provided in the main body, it is necessary to act to stop blood pressure or to pinch the tube with forceps or the like. Therefore, bleeding from the indwelling needle can be prevented when the cannula is removed or the circuit stent is connected.

In the indwelling puncture needle with a wing having a branch portion according to the present invention, the cylindrical body having the puncture inner cylindrical needle is provided with the cylindrical protective cap so as to be slidable, so that the outer cylindrical needle (preferably a Teflon needle) is provided. When removing the inner needle (metal needle) from the
The protective cap covers the distal end portion of the inner cylindrical needle, and erroneous puncture can be prevented. Also, since the inner cylinder needle can be discarded while being covered with the protective cap, the operator's procedure after puncturing can be performed with extremely low safety as compared with a conventional puncturing needle.

Further, in the present invention, the puncture state can be easily confirmed because blood flows backward through the hollow of the tube (blood channel portion) at the time of blood vessel insertion by the hole provided in the inner tube needle. Still further, in the present invention, the liquid stop valve has a sufficient blood stopping effect by being formed of a ring-shaped elastic member or a liquid stop member having a function of clamping a tube provided in the main body. Furthermore, in the present invention, since the openable and closable sealing means is a screw-shaped cap, a sufficient effect can be obtained in that sufficient leakage of the liquid can be prevented and the liquid can be opened and closed as required. .

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in more detail, but the present invention is not limited thereto.

FIG. 1 is a plan view showing a winged indwelling puncture needle 1 of the present invention. FIG. 2 is a sectional view showing the indwelling puncture needle 1 with a wing. FIG. 3 is an external view showing the inner cylindrical needle. FIG.
FIG. 4A is a drawing in which a protective cap and a luer connector screw-shaped cap are added to an inner cylinder needle, FIG. 4A is a drawing in which a protective cap is provided on the inner cylinder needle, and FIG. It is a drawing showing a place where has been moved. FIG. 5 is an overall view of the indwelling puncture needle with a wing made of a ring-shaped elastic member. FIG. 6 is a side view of a liquid stopping member for mechanically clamping a vinyl chloride tube or a silicone tube.

1 and 2, reference numeral 1 denotes a winged indwelling puncture needle of the present invention, and a Teflon needle 2 is provided in front of a main body 11.
And has an opening at the rear end 12 and further has a wing 4. The metal needle 3 is accommodated in the inner space of the Teflon needle 2 (see FIG. 5). In the indwelling puncture needle 1 with wing,
The Teflon needle 2 has a rear end formed in a trumpet shape, and the end may be widened or small. It is inserted into the tapered portion 13 a of the tip 13 of the main body 11, and is fixed by the Teflon needle fixing frame 14. The Teflon needle fixing frame 14 has a conical shape. After the flared portion of the Teflon needle 2 is put on the tip of the main body 11, then the Teflon needle fixing frame 14 is put so as to sandwich the Teflon needle fixing frame 14. Fix with.

The tip of the main body 11 has a notch in the axial direction. When the tip is fitted to the Teflon needle fixing frame 14, the notch is reduced to facilitate the fitting. Main body 11
The inner lumen 15 of the puncture needle guide tube is used as described later, and an inner needle is inserted into the inner cavity 15 for puncture. After removing the inner cylindrical needle, the liquid is stopped by the liquid stopping members 9 to 60. In particular, when the clamping member 60 is used as the liquid stopping member, it is preferable to provide the threaded cap 36 at the end of the tube.

Further, the main body 11 has a branch pipe 5 which is fitted in a fitting part 12 at the lower part of the main body, and the fitting part 12 is connected to the main body passage. Have been. The branch pipe has a recess 52 for fixing the wing. The tip portion 13 of the main body 11, the Teflon needle 2 and the Teflon needle fixing frame 14 are preferably manufactured by integral molding. The connection between the main body 11 and the branch pipe 5 is fixed by bonding, welding, or other means commonly used in this technical field.

In FIG. 3, the metal needle as the inner cylinder needle 3 is inserted into the inner space of the distal end of the needle fixing cylinder 32, and further has a convex stopper 34 at this portion. It also acts as a stopper for the protective cap (see FIG. 4b). The needle fixing cylinder 32 is provided with a hole 33 behind the fixing part of the metal needle 3, and the sterilizing gas is uniformly filled in the tube through the hole 33 during sterilization. When a blood vessel is punctured, it can be confirmed whether or not it has been inserted into the blood vessel by watching the blood flowing to the branch tube 5. In order to prevent air from entering the body, the puncture needle portion is evenly filled with a physiological saline solution through the tube 51 and the hole 33 to prevent air from entering the body. The metal needle of the inner cylinder needle may be formed entirely of a metal cylinder in place of the needle fixing cylinder 32, and may be provided with a hole at a required position. Needless to say, prevent it.

FIG. 4 shows a state in which a protective cap and a luer connector / screw cap are attached to the inner cylinder needle. In FIG. 4A, a needle fixing cylinder 3 of a metal needle member is shown.
2, the protective cap 35 is covered concentrically,
The metal needle 3 is formed so as to be movable in the tip direction. In other words, the protective cap 35 is connected to the cylinder connected to the metal needle as a slide shaft, and when the metal needle portion is covered with the protective cap, the protective cap slides forward to hit the convex stopper. Then, the protective cap case is pulled out forward. A threaded cap 36 is provided at the rear end of the needle fixing barrel 32.

As shown in FIG. 4B, when the metal needle 3 is further advanced, it comes into contact with and is stopped by the convex stopper 34 provided on the inner cylindrical needle, and the metal needle 3 is stored in the protective cap case 35. As described above, in the conventional method, erroneous puncturing may occur when inserting the needle into the inner cylinder needle (puncture needle) storage case. However, in this structure, the case is attached to the inner cylinder needle 3 in advance, and the case is further removed from the blade tip rear portion. By sliding, it is possible to perform a discarding operation without causing a erroneous stab and a disposing operation.

As shown in FIG. 5, the winged indwelling puncture needle of the present invention has a metal tip portion protected by a metal needle protection cap 6 and a rear end at the rear end of the main body portion 11. It is possible to use a clamp-like hemostasis preventing member having a hemostasis preventing valve 9 such as a valve, or preventing the ejection of blood by pressing the tube. An example is the clamp member shown in FIG.

In the liquid stopping member 60 shown in FIG.
Numeral 1 has an arcuate shape having a convex portion 62 at the lower center, and is fixed to the branch pipe 5 by a fulcrum 63. Clamp 61
When the clamp 61 ′ is pushed downward to the state of 62, the tube 65 connected to the rear end of the main body between the convex portion 62 and the fixing portion 53 of the branch pipe 5 is pressed to close the flow path. . In this way, the liquid is stopped by mechanically clamping the vinyl chloride tube or the silicone tube connected to the rear end of the main body.

(Function) In the present invention, a flexible outer tube needle is fixed to the outer tube needle fixing portion, the inner tube needle is inserted into the outer tube needle, and a branch pipe is provided behind the fixing portion to provide a blood vessel. After the puncture into the blood vessel, the inner cylindrical needle is withdrawn and only the outer cylindrical needle is placed in the blood vessel, so that it is possible to prevent damage to the inner wall of the blood vessel when the needle is left in the blood vessel for a long time. And the blood can be easily circulated to the branch pipe. Also, in the case where the inner cylinder needle member has a protective cap, when removing the inner cylinder needle (metal needle), the protective cap is covered and the function of preventing erroneous puncture is exerted, so the operator (user) performing the puncture act It is extremely secure.

In the present invention, the method of utilizing the rear lumen of the puncture needle guide tube is as follows.

1) Used as a drug solution inlet; there is a possibility that a drug having a small molecular weight is removed or adsorbed due to the pore size (pore diameter) of a dialysis membrane (hollow fiber) due to the diffusion or filtration of a dialyzer by dialysis. For this reason, administration to the extracorporeal circuit is generally performed from a rubber button on the vein side in principle. However, the use of an injection needle can sometimes lead to a false puncture. The drug solution is injected by utilizing the puncture hole (luer connector) of the indwelling needle to prevent the puncture without reducing the effect of the drug. Occasionally, a drug solution can be administered by connecting a syringe or an infusion set using the lumen of the puncture opening of the indwelling needle. In addition, when using a syringe, the conventional extracorporeal circuit for dialysis punctures the rubber button with a syringe, which often results in accidental stab accidents. Accidents can be eliminated.

2) Utilization of injecting a drug solution; mixing and injecting drugs having different medicinal effects may cause turbidity, reduce the effect of the drug, and in some cases may cause harm. It can also be used when injecting chemicals.

3) Utilization of other infusion / transfusion therapy: In addition to drug infusion therapy, it can be used for infusion and transfusion therapy.

4) Securing indwelling of indwelling needles in blood vessels; patients who are hospitalized and undergoing dialysis treatment or who undergo transfusion therapy after dialysis need to indwell and secure dialysis needles. It can also be secured for a long time by attaching a syringe made of heparinized saline to the lumen.

5) Utilization of Blood Sampling; When blood is collected from an extracorporeal circuit when blood is collected from arteries such as leukocytes and platelets in a general blood test, a leukocyte-reducing action (hemodilys) is obtained.
isleukopenia) indicates a value that is less than half the actual value. Therefore, blood must be collected from the puncture needle to minimize this reduction. However, the conventional puncture needle is not only troublesome because it is necessary to press and stop the blood at the distal end of the needle with a finger or the like and attach a syringe, and it also causes bleeding depending on the compression state and may cause blood contamination. Of course, it cannot be used as a needle for blood testing of leukocytes and platelets with a winged indwelling needle currently on the market. However, such technical problems concerning blood collection can be solved by using the present indwelling needle.

[0032]

According to the present invention, a flexible outer needle is fixed to the outer needle fixing portion, a branch pipe is provided behind the fixing portion, and a liquid stop valve is provided at the opening at the rear end of the fixing portion. And a tubular body having a puncture inner tubular needle at one end and an openable and closable sealing means at an opening at a rear end of the tubular body. The tubular body having the inner tubular needle is movable into and out of the main body. An operator (user) who performs a puncturing operation by using a winged indwelling puncture needle having a branch portion, which is configured to be inserted into the )
Which is extremely safe, can prevent damage to the inner wall of the blood vessel when indwelled in a blood vessel for a long time, and has an excellent effect of being able to provide an indwelling puncture needle with wings which is extremely easy to use. It is.

Further, according to the constitutions of the present invention, (1) the conventional AVF indwelling needle is made of Teflon material, so that even if the indwelling needle is left in the blood vessel for a long time, the inner wall of the blood vessel may be damaged or torn. Can be prevented. (2) No bleeding from the indwelling needle can be prevented when the cannula is removed or the circuit stent is connected, because there is no act of stopping the blood pressure and holding the tube with forceps or the like.
(3) When removing the inner cylinder needle (metal needle) from the outer cylinder needle (Teflon needle), the protective cap is covered and has an erroneous puncture prevention function. (4) Since the metal needle can be covered with the protective cap and discarded by the above-mentioned act (3), the operator's procedure after puncturing can be more secure than the conventional puncturing needle. . (5) The confirmation of the insertion of a blood vessel has an excellent effect such that the puncture state can be easily grasped because blood flows backward through the hollow of the cylinder.

[Brief description of the drawings]

FIG. 1 is a plan view showing a winged indwelling puncture needle of the present invention.

FIG. 2 is a cross-sectional view showing a winged indwelling puncture needle.

FIG. 3 is an external view showing an inner cylinder needle.

Fig. 4 Protective cap and luer connector
It is a drawing showing a place where a screw cap is attached,
4A is a drawing in which a protective cap is provided on the inner cylindrical needle, and FIG. 4B is a drawing showing a state in which the protective cap is moved to the tip of the needle.

FIG. 5 is an overall view of a winged indwelling puncture needle made of a ring-shaped elastic member.

FIG. 6 is a side view showing a liquid stopping means for mechanically clamping a vinyl chloride or silicone tube.

[Explanation of symbols]

Reference Signs List 1 wing indwelling puncture needle 31 hole (metal needle) 2 Teflon needle 32 needle fixing tube 3 metal needle 33 hole (tube) 4 wing 34 convex stopper 5 branch pipe 35 protection cap (for inner cylinder needle) 6 cannula protection cap 36 screw Shaped cap 7 Extracorporeal circuit connection tube 51 Blood flow path part of branch pipe 8 Clamp 52 Recess for wing fixing 9 Hemostasis prevention valve 53 Fixed part 11 Main part 60 Liquid stopping member 12 Main part rear end (with opening) 61 Clamp 13 Main part Part tip 62 Convex part (clamp) 13a Tapered part (body tip) 63 Support point 14 Teflon needle fixing frame 64, 64 '
Clamp handle 15 Piercing needle guide tube rear lumen 65, 66 tubes

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshitaka Yasuda, Inventor, 2-24-11 Motomachi, Urawa City, Saitama Prefecture Inside Hanako Medical Co., Ltd. (72) Akiko Kitabayashi, 2-24-11, Motomachi, Urawa City, Saitama Prefecture Hanako Medical F term (reference) 4C077 AA05 BB01 DD30 EE01 KK30 PP18

Claims (5)

[Claims] 1. A main body having a flexible outer needle fixed to an outer needle fixing portion, having a branch pipe behind the fixing portion, and having a liquid stop valve at an opening at a rear end of the fixing portion. A tubular body having a puncture inner tubular needle at one end, and having a sealing means that can be opened and closed at an opening at the rear end, and a tubular body having the inner tubular needle,
A winged indwelling puncture needle having a branch portion, which is inserted into the main body so as to be able to advance and retreat, and is configured to protrude from the tip of the outer cylindrical needle so as to be able to protrude and retract. 2. The indwelling puncture needle with a wing according to claim 1, wherein the tubular body having the puncture inner needle is provided with a tubular protective cap so as to be slidable. 3. The branch portion according to claim 1, wherein the liquid stop valve comprises a ring-shaped elastic member or a liquid stop member having a function of clamping a tube provided in the main body. Indwelling puncture needle with wings. 4. The indwelling puncture needle having a wing according to claim 1, wherein the sealing means that can be opened and closed is a screw-shaped cap. 5. The indwelling puncture needle with a wing according to claim 1, wherein the outer cylinder needle is a Teflon needle.