JP2004041552A - Drainage tube dwelling device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drainage tube dwelling device for endoscopes with an excellent cost performance which enables the arrangement of a high frequency power source connector at the base end of an electroconductive guide wire with a puncture part formed at the tip with a low cost. <P>SOLUTION: The high frequency power source connector 16 which is mounted at the base end part of the guide wire 1 with a drainage tube 3 fitted and held on the tip side is constituted of a contact pin 16a connected and fastened directly straight axially on the base end of the guide wire 1 and an electrically insulating insulation seat 16b arranged surrounding at least the base part portion of the contact pin 16a. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an endoscope drainage tube indwelling device that is used by being inserted into a treatment instrument insertion channel of an endoscope in order to indwell a drainage tube in a body cavity.
[0002]
[Prior art]
In general, a drainage tube indwelling device for an endoscope used for a procedure of endoscopically placing a drainage tube in a body in order to discharge a secretion accumulated in a pancreatic duct, a bile duct, or the like is punctured into a living tissue. A flexible guide wire with a puncture portion provided at the distal end, a drainage tube fitted at a position near the distal end of the guide wire and held there by frictional resistance, and a drainage tube that can be pushed forward. And a pusher comprising a flexible tube loosely fitted on the guide wire.
[0003]
Then, in order to eliminate bleeding when the tip of the guide wire is punctured into the living tissue, a high-frequency power supply connector for connecting a high-frequency power cord is provided so that a high-frequency current can be supplied to the guide wire. Attached to the proximal end.
[0004]
FIG. 2 shows such a conventional high-frequency power supply connector 102. The contact pin 102a of the high-frequency power supply connector 102 is pressed in such a manner that the base end of the guide wire 101 to which the base 103 is fixed is pressed from the side. The insulating seat 102b is provided so as to surround the contact pin 102a.
[0005]
[Problems to be solved by the invention]
However, in the structure in which the high-frequency power supply connector 102 is attached laterally to the base end portion of the guide wire 101 as described above, in addition to the members for connecting the high-frequency power supply code, A large number of members 104 to 108 are required for mounting, and the cost of parts and assembly has increased.
[0006]
Accordingly, an object of the present invention is to provide a drainage tube indwelling device for an endoscope which is excellent in cost performance and can arrange a high frequency power supply connector at a base end of a guide wire at low cost.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a drainage tube indwelling device for an endoscope of the present invention includes a conductive guide wire provided with a puncture portion at the distal end for puncturing a living tissue, and a position near the distal end of the guide wire. To connect a high frequency power cord to a drainage tube fitted and held there by frictional resistance, a pusher consisting of a flexible tube loosely fitted to a guide wire so that the drainage tube can be pushed out to the front side, An endoscope drainage tube indwelling device having a high-frequency power supply connector attached to a base end of a guide wire, wherein the high-frequency power supply connector is directly connected and fixed to the base end of the guide wire straight in the axial direction. A pin and an electrically insulating insulating seat arranged so as to surround at least a base portion of the contact pin. .
[0008]
If the high-frequency power supply connector is constituted only by the contact pins and the insulating seats, the cost for parts and assembly can be minimized.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a drainage tube indwelling device for an endoscope according to an embodiment of the present invention, and 1 is a flexible guide wire made of, for example, a single or stranded wire of a conductive stainless steel wire, A puncturing portion 1a for puncturing a living tissue is formed at a distal end portion, which is formed to have a length that is, for example, about 10 to 20 cm longer than a treatment tool insertion channel of an endoscope to be used.
[0010]
On the surface of the guide wire 1, an electrically insulating coating 1b made of a coating or a tube or the like of a tetrafluoroethylene resin, a polyimide resin, a polyethylene resin, or the like is integrated with the guide wire 1 almost entirely except for the puncture portion 1a. It is applied as follows.
[0011]
At a position near the distal end of the guidewire 1, a drainage tube 3 to be indwelled for draining the liquid in the body is fitted, for example, at a distance of about several mm to 1 cm from the puncture portion 1 a at the distal end of the guidewire 1. Have been.
[0012]
The drainage tube 3 is a so-called pigtail type drainage tube in which both ends are curled in a natural state as shown by a two-dot chain line. When the drainage tube 3 is placed in a body organ, the curled portions of both ends are accommodated in the organ. It serves as an anchor. However, the drainage tube 3 may be of various types such as straight or S-shaped.
[0013]
The pigtail type drainage tube 3 is made of, for example, a soft plastic such as a fluororesin. When the pigtail type drainage tube 3 is fitted on the guide wire 1, it is elastically deformed and straightened. Is held on the guide wire 1 by the frictional resistance generated between them.
[0014]
A pusher 4 made of a flexible tube for pushing the drainage tube 3 forward is loosely fitted over the guide wire 1 over the entire length of a portion closer to the hand side than the portion where the drainage tube 3 is held.
[0015]
The pusher 4 is formed of an electrically insulating flexible tube such as a tetrafluoroethylene resin, a polyimide resin, or a polyethylene resin, and is fitted to the guide wire 1 so as to be able to advance and retreat. Abuts against the rear end face.
[0016]
Therefore, if the pusher 4 is pushed forward along the guide wire 1, the drainage tube 3 can be pushed out from the distal end of the guide wire 1 by an operation from the hand side.
[0017]
The hand main body 11 disposed on the hand side of the drainage tube indwelling device has a luer lock female mouth part 11a detachably attached to an entrance portion of the treatment instrument insertion channel of the endoscope, which is fixed to one end side of the support cylinder body 11b. The cap portion 11c is screwed to the other end of the support tubular portion 11b.
[0018]
A cylindrical tubular body 12 made of, for example, stainless steel and fixedly connected to the base end of the pusher 4 is fitted into the support tubular body 11b so as to be able to advance and retreat in the axial direction. A manual fixing screw 13 for arbitrarily fixing to the hand body 11 is screwed into a screw hole formed on a side surface of the cap 11c. Reference numeral 14 denotes a retaining pin for retaining the manual fixing screw 13.
[0019]
Therefore, if the manual fixing screw 13 is loosened, the cylindrical tubular body 12 can be moved forward and backward so as to move the pusher 4 in the insertion / removal direction with respect to the treatment tool insertion channel of the endoscope. When tightened, the cylindrical tubular body 12 is fixed to the hand main body 11, and the pusher 4 does not move with respect to the endoscope.
[0020]
An inner cylindrical body 15 made of, for example, an electrically insulating plastic pipe or the like that partially projects from the proximal end of the cylindrical cylindrical body 12 is fixed to the base end portion of the guide wire 1 so as to surround the coating 1b. Thus, it is inserted into the cylindrical tubular body 12 so as to be able to advance and retreat in the axial direction.
[0021]
A high-frequency power supply connector 16 for connecting a high-frequency power supply cord (not shown) is attached to the base end of the inner cylindrical body 15, and the connection terminal 16 a of the high-frequency power supply connector 16 is electrically connected to the guide wire 1. Is electrically conductive.
[0022]
Therefore, a high-frequency current is applied to the puncture portion 1a at the distal end through the guide wire 1 to puncture the target site without bleeding at the time of puncturing the target site, and then the drainage tube 3 is pushed along the guide wire 1 by the pusher 4 It can be extruded and placed at the target site. Reference numeral 17 denotes a finger hook fixed to the base end of the cylindrical tubular body 12.
[0023]
The high-frequency power supply connector 16 of this embodiment includes only a contact pin 16a made of a conductive metal and an insulating seat 16b made of an electrically insulating material surrounding the contact pin 16a. The tip portion of the guide wire 1 is directly inserted into a hole formed in the hole, and is fixed thereto by soldering or the like. Therefore, the contact pin 16a is located straight on the extension of the axis of the base end of the guide wire 1.
[0024]
The insulating seat 16b surrounds the entire periphery of the contact pin 16a from the portion connected to the inner cylindrical body 15 and is embedded in the insulating seat 16b of the contact pin 16a disposed so as to pass through the axial position of the insulating seat 16b. A flange-like portion 16c is formed to protrude from the contacted portion so as to prevent the contact pin 16a from coming off.
[0025]
As described above, the high-frequency power supply connector 16 is composed of only the contact pins 16a which are connected and fixed straight to the guide wire 1 and the insulating seats 16b surrounding the contact pins 16a. It can be carried out.
[0026]
The present invention is not limited to the above-described embodiment. For example, the insulating seat 16b may be disposed so as to surround at least the base of the contact pin 16a.
[0027]
【The invention's effect】
According to the present invention, a high-frequency power supply connector is directly connected and fixed to a base end of a guide wire in a straight line in an axial direction, and an electrically insulating insulating seat arranged so as to surround at least a base portion of the contact pin. With this configuration, component costs and assembly costs can be significantly reduced, and the high-frequency power supply connector can be arranged at a low cost at the base end of the guide wire.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a drainage tube indwelling device for an endoscope according to an embodiment of the present invention.
FIG. 2 is a side sectional view of a high-frequency power supply connector portion of a conventional drainage tube indwelling device for an endoscope.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Guide wire 1a Puncture part 3 Drainage tube 4 Pusher 16 High frequency power supply connector 16a Contact pin 16b Insulation seat 16c Flange

Claims (2)

A conductive guide wire having a puncture portion provided at the distal end thereof for puncturing a living tissue, a drainage tube fitted to a position near the distal end of the guide wire and held there by frictional resistance, and the drainage tube. It has a pusher made of a flexible tube loosely fitted on the guide wire so as to be pushed out to the front side, and a high frequency power supply connector attached to a base end of the guide wire for connecting a high frequency power cord. In the drainage tube indwelling device for endoscope,
The high-frequency power supply connector is constituted by a contact pin directly connected and fixed to the base end of the guide wire straight in the axial direction, and an electrically insulating insulating seat disposed so as to surround at least a base portion of the contact pin. A drainage tube indwelling device for an endoscope, comprising: 2. The endoscope drainage tube indwelling device according to claim 1, wherein the high-frequency power supply connector comprises only the contact pin and the insulating seat.

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