JP4495354B2 - Bipolar high-frequency treatment instrument for endoscope - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bipolar high-frequency treatment instrument for an endoscope having both positive and negative electrodes at a distal end portion.
[0002]
[Prior art]
In general, a high-frequency treatment instrument for an endoscope has an electrode attached to the tip of a conductive operation wire connected to one pole of a high-frequency power supply, and the other pole of the high-frequency power supply is placed in contact with the patient's body surface. A counter electrode is connected.
[0003]
However, in such a monopolar type high-frequency treatment instrument, since a high-frequency current flows using the patient's body as a conductor, there is a possibility that the tissue part that does not need coagulation is cauterized. The use of a bipolar high-frequency treatment instrument provided in the case is superior in terms of energy efficiency and safety.
[0004]
[Problems to be solved by the invention]
However, in such a bipolar high-frequency treatment instrument for an endoscope, since two conductive wires that are electrically insulated from each other are used as the operation wires, the strength of the waist is insufficient, and the proximal side If the electrode is opened / closed by pushing / pulling from the side, it may not operate smoothly.
[0005]
Accordingly, an object of the present invention is to provide an endoscopic bipolar high-frequency treatment instrument capable of smoothly opening and closing an electrode at the distal end by a push-pull operation from the hand side.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the bipolar high-frequency treatment instrument for an endoscope of the present invention is a pair of conductive materials arranged so as to gradually expand toward the front side so that it can be elastically deformed and constricted. An electrode is provided at each tip portion of the elastic opening and closing member, and the pair of elastic opening and closing members are electrically insulated by an insulating material, and the pair of conductive wires electrically insulated from each other are connected to a cylindrical flexible shaft. A pair of electrodes and a pair of conductive wires are electrically connected by inserting and arranging together in the inside and connecting the base end of the elastic opening and closing member to the tip of the cylindrical flexible shaft.
[0007]
The cylindrical flexible shaft is disposed in the flexible sheath so as to be movable back and forth in the axial direction, and the elastic opening and closing member is moved by moving the cylindrical flexible shaft in the flexible sheath so that the elastic opening / closing member becomes the flexible sheath. You may comprise so that it may project from the front-end | tip and open and close.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows the overall configuration of the bipolar high-frequency treatment instrument for endoscope according to the first embodiment of the present invention. For example, at the base end of an electrically insulating flexible sheath 7 made of a tetrafluoroethylene resin tube. In the connected operation unit 10, the pair of elastic opening / closing members 2 made of a conductive material project and retract from the distal end of the flexible sheath 7 by moving the second finger rest 12 forward and backward with respect to the first finger rest 11. For example, a blood vessel 100 or the like can be held between the electrodes 1 provided at the distal ends of the elastic opening / closing members 2.
[0009]
The pair of elastic opening / closing members 2 is electrically connected to a pair of contact pins 13 protruding from the first finger hook 11. Therefore, by connecting the output connector 20 of the high-frequency power supply device (not shown) to the contact pin 13, a high-frequency current flows through the blood vessel 100 sandwiched between the pair of electrodes 1, and the blood vessel 100 is sandwiched between the electrodes 1. Only a part can be cauterized and coagulated to perform hemostasis treatment.
[0010]
1 and 2 show a distal end portion of a bipolar high-frequency treatment instrument for an endoscope according to a first embodiment of the present invention. FIG. 1 shows a state in which a pair of elastic opening and closing members 2 are opened. The pair of elastic opening and closing members 2 is shown in a closed state by being drawn into the distal end of the flexible sheath 7.
[0011]
Each elastic opening and closing member 2 is made of a plate spring material having good conductivity, and an electrode 1 made of a conductive material for grasping the blood vessel 100 or the like is fixed to the tip thereof so as to be electrically connected. However, the elastic opening / closing member 2 may be a linear spring material or the like.
[0012]
The pair of elastic opening / closing members 2 are arranged so as to gradually expand toward the front side so that they can be elastically deformed and constricted, and each elastic opening / closing member 2 is electrically insulated so that its surface is not exposed. A coating 2a is applied.
[0013]
In the flexible sheath 7, an electrically insulating cylindrical flexible shaft 5 made of, for example, a tetrafluoroethylene resin tube is inserted and disposed over the entire length so as to advance and retract in the axial direction.
[0014]
A pair of conductive wires 3 are inserted and disposed along the entire length of the cylindrical flexible shaft 5, and one of the conductive wires 3 is provided with an electrically insulating coating 3 a over the entire length. Therefore, the pair of conductive wires 3 are electrically completely insulated.
[0015]
As shown in FIG. 4 illustrating the IV-IV cross section in FIG. 1 and FIG. 5 illustrating the VV cross section in FIG. The base ends of the pair of elastic opening / closing members 2 are connected and fixed via an insulating chip 6 made of
[0016]
As shown in FIG. 4, the insulating chip 6 is provided with a protrusion 8 that protrudes into the inner surface of the cylindrical flexible shaft 5 and is firmly bonded. As shown in FIG. 5, the pair of elastic opening / closing members 2 are fixed in a state of sandwiching the insulating chip 6 and are electrically insulated from each other reliably.
[0017]
Further, the space 9 between the outer surface of the elastic opening / closing member 2 and the inner surface of the cylindrical flexible shaft 5 is filled with an electrically insulating silicon sealant or epoxy resin, etc. As shown, the distal ends of the pair of conductive wires 3 are respectively connected to the base ends of the pair of elastic opening and closing members 2.
[0018]
With such a configuration, when the cylindrical flexible shaft 5 is advanced and retracted in the axial direction from the proximal end side (that is, the proximal side) with respect to the flexible sheath 7, a pair of elastic opening and closing members connected to the distal end thereof In the state where 2 protrudes and retracts from the tip of the flexible sheath 7 and is drawn into the flexible sheath 7 as shown in FIG. 2, the elastic opening / closing member 2 is elastically deformed and narrowed. When pushed out from the flexible sheath 7 as shown, it expands due to the elasticity of the elastic opening and closing member 2 itself.
[0019]
FIG. 6 shows the operation unit 10, and a first finger hook 11 with a pair of contact pins 13 protruding therefrom is formed of an electrical insulating material and is connected and fixed to the proximal end of the cylindrical flexible shaft 5. The base ends of the pair of conductive wires 3 inserted and arranged in the cylindrical flexible shaft 5 pass through the first finger hook 11 and are connected to the pair of contact pins 13.
[0020]
Therefore, the pair of contact pins 13 and the pair of electrodes 1 are electrically connected via the conductive wire 3 and the elastic opening / closing member 2, and the pair of contact pins 13 are connected to the positive electrode and the negative electrode of the high-frequency power source. Thus, the pair of electrodes 1 becomes a positive electrode and a negative electrode.
[0021]
Further, since the second finger hook 12 is connected and fixed to the proximal end of the flexible sheath 7, the first finger hook 11 and the second finger hook 12 are relatively advanced and retracted to move the flexible tube. The shaft 5 moves forward and backward in the axial direction with respect to the flexible sheath 7, and the elastic opening / closing member 2 can be opened and closed.
[0022]
At this time, the movement of the first finger hook 11 is transmitted to the elastic opening / closing member 2 by the cylindrical flexible shaft 5 in a state where the two conductive wires 3 are inserted and disposed over the entire length, and the waist thereof is sufficient. Since it is strong, the operation of the first finger hook 11 is smoothly transmitted to the elastic opening / closing member 2, and the electrode 1 can be opened and closed accurately.
[0023]
Note that the present invention is not limited to the above-described embodiment. For example, the operation unit 10 has the first finger hook 11 provided with the contact pin 13 as a cylinder as in the second embodiment shown in FIG. The second finger hook 12 that is not provided with the contact pin 13 may be connected to the base end of the flexible sheath 7 by being connected to the base end of the flexible shaft 5.
[0024]
Further, as shown in FIGS. 8 and 9, if the flexible sheath 7 is omitted and the cylindrical flexible shaft 5 is directly inserted into the treatment instrument insertion channel 31 of the endoscope 30, the treatment instrument insertion channel 31. However, the elastic opening / closing member 2 can be opened and closed by performing the function of the flexible sheath 7 of the first embodiment, and this is used when the treatment instrument insertion channel 31 is used in the endoscope 30 with a small diameter. It may be configured. Reference numeral 32 denotes an observation window of the endoscope 30.
[0025]
【The invention's effect】
According to the present invention, the movement on the hand side is transmitted to the elastic opening / closing member by the cylindrical flexible shaft in which the pair of conductive wires are inserted and arranged over the entire length, and the waist is sufficiently strengthened. Therefore, the operation by the push-pull operation from the hand side is smoothly transmitted to the elastic opening / closing member at the tip, and the electrode can be opened / closed accurately.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view showing an open state of a distal end portion of a bipolar high-frequency treatment instrument for an endoscope according to a first embodiment of the present invention.
FIG. 2 is a side sectional view of the distal end portion of the bipolar high-frequency treatment instrument for endoscope according to the first embodiment of the present invention in a closed state.
FIG. 3 is an external view showing the overall configuration of the bipolar high-frequency treatment instrument for endoscope according to the first embodiment of the present invention.
4 is a cross-sectional view of the bipolar high-frequency treatment instrument for endoscope according to the first embodiment of the present invention taken along the line IV-IV in FIG.
5 is a cross-sectional view taken along the line VV in FIG. 4 of the bipolar high-frequency treatment instrument for endoscope according to the first embodiment of the present invention. FIG.
FIG. 6 is a side cross-sectional view of the operation unit of the bipolar high-frequency treatment instrument for endoscope according to the first embodiment of the present invention.
FIG. 7 is a side cross-sectional view of an operation unit of an endoscope bipolar high-frequency treatment instrument according to a second embodiment of the present invention.
FIG. 8 is a side cross-sectional view of the distal end portion of the bipolar high-frequency treatment instrument for endoscope according to the third embodiment of the present invention in a closed state.
FIG. 9 is a side cross-sectional view showing an open state of a distal end portion of an endoscope bipolar high frequency treatment device according to a third embodiment of the present invention.
[Explanation of symbols]
1 Electrode 2 Elastic switching member 2a Electrical insulation coating (insulating material)
3 Conductive wire 3a Electrical insulation coating 5 Tubular flexible shaft 7 Flexible sheath 10 Operation part

Claims (2)

An electrode is provided at each tip portion of the pair of elastic opening / closing members made of a conductive material arranged so as to gradually expand toward the front side so that it can be elastically deformed and constricted, and the pair of elastic opening / closing members A pair of conductive wires that are electrically insulated from each other by an insulating material and are electrically insulated from each other are inserted and arranged together in the cylindrical flexible shaft, and the elastic opening and closing is provided at the tip of the cylindrical flexible shaft. A bipolar high-frequency treatment instrument for an endoscope, wherein the pair of electrodes and the pair of conductive wires are electrically connected by connecting the base ends of the members. The cylindrical flexible shaft is disposed in a flexible sheath so as to be movable back and forth in the axial direction, and the elastic opening / closing member is flexibly moved by moving the cylindrical flexible shaft forward and backward in the flexible sheath. The bipolar high-frequency treatment instrument for an endoscope according to claim 1, wherein the bipolar sheath is opened and closed by projecting from the distal end of the sheath.

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