JPH0663046U - Retrograde transhepatic biliary drainage device - Google Patents

Abstract

(57) [Summary] [Purpose] The puncture needle can be inserted without losing the curved or bent direction of the puncture needle tip, and a thick tube can be introduced and indwelled with a thin puncture needle and a guide wire can be attached. Use it to replace another large diameter drainage tube. [Constitution] The front end side of the drainage tube 2 is connected to the rear connector portion 3 of the metal puncture needle 1 which has a conical shape with a tip angle of 5 to 40 ° and which has high rigidity and can be easily deformed, without steps. In the vicinity of the rear end of the puncture needle, recesses 4 are provided on both side surfaces corresponding to a plurality of positions, and the front end of the drainage tube has a taper shape that expands toward the rear end. In addition, a plurality of side holes 7 and terminal holes 9 as well as a hole 8 for fixing a thread are provided near the rear end portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disposable and inexpensive retrograde transhepatic biliary drainage device that allows medical staff to easily bend and use a puncture needle by hand according to the situation during surgery.

[0002]

[Prior art]

 As a method of indwelling a catheter or tube in the bile duct for the purpose of injecting a drug or contrast agent into the internal organs of the body, especially the bile duct, or draining the bile (peripheral drainage), it is percutaneous intrahepatic bile duct without operation. There are two methods, one is puncture and the other is to place the drainage tube in the bile duct from the outer skin side, and the other is to place the drainage tube under operation.

In the latter method, a T tube is generally used, and the drainage tube is guided directly from the common bile duct to the outside of the body without passing through the liver, but the T tube leaks bile into the body cavity. There is an easy drawback. Further, in an operation such as a bile duct-duodenal anastomosis for totally removing the common bile duct, it is difficult to use the T tube, and it is advantageous to indwell the straight tube from the biliary tract during the operation.

As a tool suitable for such an application, the present applicant has previously proposed a retrograde transhepatic biliary drainage tool having a structure in which a puncture needle and a drainage tube are connected (Japanese Utility Model Publication No. 3-16689). Japanese Utility Model Publication No. 3-41717). By using this device, the puncture needle is retrogradely inserted during operation by deforming the puncture needle by hand force according to the curvature of the intrahepatic bile duct, piercing the peripheral of the bile duct and guiding the drainage tube out of the liver surface out of the body. However, when the puncture needle was bent and inserted retrogradely during use, the proximal part of the needle sometimes rotated, and the direction of bending or bending of the tip of the puncture needle sometimes became unclear. In addition, after the drainage tube was placed, when there was a residual stone and it was desired to replace the thick drainage tube, the drainage tube would bend, and the guide wire could not be inserted properly.

[0005]

[Problems to be solved by the device]

 In view of the above-mentioned drawbacks and the present situation, the purpose of the present invention is to be inexpensive and disposable, to be operated without losing the direction of the curved or bent puncture needle tip when being guided out of the body, and to have a large diameter. (EN) Provided is a retrograde transhepatic biliary drainage device which can be easily replaced with a drainage tube.

[0006]

[Means for Solving the Problems]

 That is, the present invention forms a conical shape with a tip angle of 5 ° to 40 °, attaches the tip side of the drainage tube to the rear connector part of the puncture needle made of a metal rod or pipe that has high rigidity and can be easily deformed. A drainage tube for medical use that is connected without steps.A drainage tube is provided with dents on both sides facing each other at multiple positions near the rear end of the puncture needle. The retrograde warp is characterized in that it has a tapered shape that expands toward the side, and that a plurality of side holes and two thread fixing holes are provided near the rear end of the rear end side straight portion. It is a hepatobiliary drainage device.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing the entire retrograde transhepatic biliary drainage device according to an embodiment of the present invention, which comprises a puncture needle (1) and a drainage tube (2).

The puncture needle (1) has a tapered tip as shown in FIG. 2, and the tip angle A shown in FIG. 3 is in the range of 5 ° to 40 °, preferably 10 ° to 20 °. It has a sharp pyramidal shape with a rounded tip. If the tip angle A is less than 5 °, internal tissues, especially blood vessels, are easily damaged, and if it exceeds 40 °, puncturing or penetrating of biological tissues becomes extremely difficult or impossible. Further, the recess (4) provided near the rear end of the puncture needle has a puncture needle at the proximal end when the puncture needle (1) is bent and inserted by hand force according to the curvature of the intrahepatic bile duct during the operation. (1) is rotated so that the direction in which the tip is curved or bent is not lost, and it is provided on at least two opposite side surfaces near the rear end of the puncture needle (1).

The depression (4) also serves as a back eye for preventing slippage when the puncture needle (1) is held with a fingertip, but if the depression is too shallow or too wide in the longitudinal direction. It is difficult to detect with your fingertips, and the anti-slip effect cannot be obtained. On the other hand, if the depression is made too deep, the puncture needle may be easily bent. Further, when the puncture needle is pressed from both sides with a jig to form the dent, if the dent is made too deep, a part of the dent (4) will be outside the puncture needle (1) as shown in FIG. The protrusion (11) is generated by protruding outside the diameter. There is no problem if the business trip (11) is within a proper range, but if it is large, problems such as damage to living tissues will occur.

The outer diameter of the puncture needle (1) is usually 2 to 5 mm, while the depth of the recess (4) is 1/10 to 1/5 of the outer diameter, and is 0. 0.25 to 1 mm, and the width in the lengthwise direction is preferably about 2 to 10 mm, and the above objects and effects are achieved and no trouble occurs. Further, as the protrusion (11), if it is about 0.1 to 0.6 mm, it does not cause much influence.

The connector part (3) at the rear of the puncture needle (1) is a scaly projection as shown in FIG. 2 and is shaped so that the drainage tube (2) can be connected without steps. Then, as shown in FIG. 1, the vicinity of the distal end side of the drainage tube (2) is connected to the connector part (3) of the puncture needle (1) and faces the straight part (6) on the rear end side. The taper portion (5) has a gradual taper that increases in diameter. Also, the connecting portion to the connector portion (3) may be straight with a constant outer diameter, and the taper portion (5) may be provided on the rear end side thereof without any problem. The dimensions of the tube for drainage (2) are 2 to 5 mm, the outer diameter of the tip is the same as that of the puncture needle (1), and the length of the taper (5) is 5 to 100 mm, preferably about 10 to 20 mm. Suitably, the straight portion (6) has an outer diameter of 2.5 to 8 mm and a length of 400 to 700 mm.

The side holes (7) provided in the vicinity of the rear end of the straight portion (6) of the drainage tube (2) are usually 2 to 6 with a diameter of 0.5 to 2.0 mm, and the end holes (9 The size of) is about the same as that of the side hole, but is not particularly limited as long as the shape and the number are easily drained.

Two thread fixing holes (8) for fixing the drainage tube (2) are provided near the end of the straight portion (6), preferably at a position 45 mm from the end. When two thread fixing holes (8) are opened at a position that penetrates the center of the drainage tube (2), the thread drainage effect may be reduced by the thread, so as shown in Fig. 5 (a). It is advisable to provide a through hole as close to the end as possible of the cross section, or to provide in the longitudinal direction of the tube as shown in FIG. 5 (b). When provided in the longitudinal direction, it is appropriate that the distance between the two holes is about 2 to 10 mm.

The material of the puncture needle (1) according to the present invention is metal such as aluminum, stainless steel, brass, etc., as long as it can be easily bent or bent by hand during surgery. It is not limited to. In addition, the drainage tube (2) has the flexibility and strength necessary for smoothly penetrating a living tissue under the guidance of the puncture needle (1), and does not deteriorate due to contact with bile. It is required that the bile in the eye has a property such that it is visually transparent. Examples of materials that meet these material requirements include thermoplastic resins such as soft vinyl chloride resin, polyurethane, and polyethylene, and rubbers such as silicone rubber and various thermoplastic elastomers. From the viewpoint, it is preferable to use a soft vinyl chloride resin.

Further, the drainage tube (2) may be provided with an X-ray opaque line (10) in its entire length in the longitudinal direction or in the vicinity of the rear end thereof for the purpose of confirming the position during indwelling in the body. As a material for the X-ray opaque line (10), a material obtained by kneading barium sulfate, bismuth subcarbonate or the like into a resin is used, but the material is not limited to these.

Next, a method of using the drainage tool according to the present invention will be described. First, at the time of surgery, the puncture needle (1) is inserted into the liver through the common bile duct and percutaneously removed from the body, and then pulled further to pull in the drainage tube (2), and the rear end of the straight portion (6). Is placed at the target position in the biliary tract. At this point, the absorbent thread is passed through the thread fixing hole (8) and fixed, and the operation is completed. After that, the absorbent thread is absorbed and disappears, so that the drainage tube can be easily removed after healing. Depending on the post-operative course, it may be necessary to replace the tube with another thick drainage tube.In such a case, first insert the guide wire into the indwelling tube, and then replace the tube. Remove the guide wire and guide another drainage tube along the guide wire. When it is confirmed that the drainage tube has been inserted to the target position, remove the guide wire and complete the tube replacement.

[0017]

[Effect of device]

 The retrograde transhepatic biliary drainage device according to the present invention is provided with a plurality of recesses at the rear end of the puncture needle, so that when the puncture needle is inserted while bending according to the bending of the intrahepatic bile duct, Since the bending or bending direction of the tip can be known, the puncture needle can be inserted safely. Also, since the tip of the drainage tube is tapered, it is possible to indwell a thick drainage tube with a thin puncture needle, and the thread fixing hole near the rear end of the drainage tube has a drainage route. It is provided so that it does not interfere, and it can be easily exchanged with another tube using a guide wire by fixing it with an absorbent thread and guiding and fixing it as linearly as possible to the body surface. Therefore, it is useful as a biliary drainage device.

[Brief description of drawings]

FIG. 1 is a diagram showing an entire retrograde transhepatic biliary drainage device according to an embodiment of the present invention.

FIG. 2 is a side view showing the entire puncture needle portion of FIG.

FIG. 3 is an enlarged view of a tip portion of a puncture needle.

FIG. 4 is a top view showing the shape of the depression of the puncture needle.

FIG. 5 is a view showing an example of a thread fixing hole of the drainage tube.

[Explanation of symbols]

 1 Puncture needle 2 Drainage tube 3 Connector part 4 Dimple 5 Tapered part 6 Straight part 7 Side hole 8 Thread fixing hole 9 End hole 10 X-ray opaque line 11 Protrusion A Tip angle

Claims (2)

[Scope of utility model registration request] 1. A drainage tube having a conical shape with a tip angle of 5 ° to 40 °, and a distal end side of a drainage tube being attached to a rear connector portion of a puncture needle made of a metal rod or pipe having high rigidity and being easily deformable. A drainage tube indwelling device for medical use that is connected without steps and has dents on both side surfaces facing each other at multiple positions in the vicinity of the rear end of the puncture needle. The retrograde transhepatic biliary tract is characterized in that it has a taper shape that expands toward the rear end and that a plurality of side holes and two thread fixing holes are provided near the rear end of the rear end side straight portion. Road drainage equipment. 2. The depth of the recesses provided on both side surfaces near the rear end of the puncture needle is 1/10 to 1/5 of the outer diameter of the puncture needle, and is 0.
It is in the range of 25 to 1 mm.
The retrograde transhepatic biliary drainage device described.