JP2002306506A - Bipolar high frequency endo-therapy accessory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high safety bipolar high frequency endo-therapy accessory, with which both electrodes are not short-circuited even when it is used under on bad conditions or when there is erroneous operation or the like. SOLUTION: A pair of electrodes 1 arranged on the top end of each of a pair of opening/closing members 2, which are opened/closed by remote control from a base end side, are formed while respectively exposing confronted faces and an inter-electrode insulation securing member 10 composed of an electric insulator is provided for blocking the mutual contact of a pair of electrodes 1 in the state of completely closing the opening/closing members 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bipolar high-frequency treatment device for an endoscope which has both positive and negative electrodes at a distal end portion and is used through a treatment device insertion channel of an endoscope.

[0002]

2. Description of the Related Art In general, a high-frequency treatment instrument for an endoscope has an electrode attached to the tip of a conductive operating wire connected to one pole of a high-frequency power supply, and the other pole of the high-frequency power supply connected to the body surface of a patient. Is connected to a counter electrode plate which is arranged in contact with.

However, in such a monopolar high-frequency treatment instrument, a high-frequency current flows using the patient's body as a conductor, so that a tissue portion that does not require coagulation may be cauterized.

Therefore, the use of a bipolar high-frequency treatment instrument provided with both positive and negative electrodes at the distal end is superior in terms of energy efficiency and safety. Generally, a pair of high-frequency treatment instruments which are opened and closed by remote control from the proximal end side is used. An electrode made of a conductive member is arranged at each end of the opening and closing member so as to be electrically insulated from each other.

[0005]

In such a bipolar high-frequency treatment instrument for an endoscope, current flows through a tissue between a pair of electrodes, so that opposing surfaces of both electrodes are exposed. ing.

Therefore, for example, when a tissue piece sandwiched between both electrodes is very small and the tissue piece is broken by applying a high-frequency current, the two electrodes are in contact with each other and short-circuited. And a high-frequency high current may flow to cause an accident or a failure. In addition, such a case may occur due to an erroneous operation or the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly safe endoscope bipolar radio frequency treatment instrument in which both electrodes are not short-circuited even in a condition of use under unfavorable conditions or an erroneous operation. .

[0008]

In order to achieve the above-mentioned object, a bipolar high-frequency treatment instrument for an endoscope according to the present invention comprises a pair of opening / closing members which are opened and closed by remote control from a proximal end side. In a bipolar high-frequency treatment instrument for an endoscope in which electrodes made of a conductive member are arranged in a state where they are electrically insulated from each other, a pair of electrodes are formed by exposing respective opposing surfaces, and an opening / closing member is provided. Is provided with an inter-electrode insulation securing member made of an electrical insulating material for preventing contact between a pair of electrodes when the member is in a closed state.

The inter-electrode insulation securing member may be protruded from the base end side between the pair of opening and closing members.
Alternatively, the inter-electrode insulation securing member may be formed on one or both of the pair of opening / closing members, or on one or both of the pair of electrodes.

[0010]

Embodiments of the present invention will be described with reference to the drawings. 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 pair of elastic opening / closing members 2 provided inside a distal end of a flexible sheath 7. FIG. 2 shows a state in which the pair of elastic opening / closing members 2 protrude forward from the distal end of the flexible sheath 7 and are open.

The flexible sheath 7 inserted into and removed from the treatment instrument insertion channel of the endoscope is formed of an electrically insulating tube such as a tetrafluoroethylene resin tube. It is formed of a good leaf spring material. However, the elastic opening / closing member 2 may be a linear spring material or the like.

At the tip of each elastic opening / closing member 2, an electrode 1 made of a conductive material fixed in a state of being electrically connected to the elastic opening / closing member 2 is fixed by exposing at least the surface of the opposing surface. I have.

The pair of elastic opening / closing members 2 are arranged so as to gradually expand toward the front side in a natural state so that they can be elastically deformed and narrowed. Electrical insulation coating 2a so as not to be exposed
Is given.

In the flexible sheath 7, an electrically insulating tubular flexible shaft 5 made of, for example, a tetrafluoroethylene resin tube is provided.
Are inserted through the entire length so as to be able to advance and retreat in the axial direction.

In the cylindrical flexible shaft 5, a pair of conductive wires 3 are inserted and arranged along the entire length, and one of the conductive wires 3 is provided with an electric insulating coating 3a over the entire length. Therefore, the pair of conductive wires 3 is completely insulated electrically.

An insulating chip 6 made of an electrically insulating hard plastic or the like is fixed to the distal end of the cylindrical flexible shaft 5, and the base ends of the pair of elastic opening / closing members 2 are connected and fixed to the insulating chip 6. ing.

FIG. 3 is a sectional view of the portion (II in FIG. 1).
I-III section), and a pair of elastic opening / closing members 2
Are fixed so as to sandwich the insulating chip 6, and are electrically insulated from each other reliably.

A space 9 between the outer surface of the elastic opening / closing member 2 and the inner surface of the tubular flexible shaft 5 is filled with an electrically insulating silicone sealant or epoxy resin.
As shown in FIG. 1 and FIG.
The distal ends of a pair of conductive wires 3 are respectively connected to the base ends of.

An electrically insulating inter-electrode insulation securing member 10 for preventing contact between the pair of electrodes 1 when the elastic opening / closing member 2 is completely closed is provided at an intermediate portion between the pair of elastic opening / closing members 2. , Formed at the tip of an elongated rod-like portion 6 a extending forward from the insulating chip 6.

When the pair of elastic opening / closing members 2 are completely closed and come into contact with each other, the inter-electrode insulation securing member 10 is, for example, 0.2 mm between the opposed exposed surfaces of the pair of electrodes 1. It is formed in such a size that the above interval is secured.

With such a configuration, when the tubular flexible shaft 5 is advanced or retracted in the axial direction from the proximal end (that is, the proximal side) with respect to the flexible sheath 7, a pair of the distal ends thereof is connected. The elastic opening / closing member 2 protrudes and retracts from the distal end of the flexible sheath 7.

When the elastic opening / closing member 2 is retracted into the flexible sheath 7 as shown in FIG. 1, the elastic opening / closing member 2 is elastically deformed and narrows, and as shown in FIG. When pushed out of the flexible sheath 7, the elastic opening / closing member 2
Spreads by its own elasticity. In a state where the electrode 1 slightly protrudes from the distal end of the flexible sheath 7, the electrode 1 is in a constricted state as in FIG.

FIG. 4 shows an operating portion connected to the base end of the flexible sheath 7, and the contact pins 13 to which the conductive wires 3 are connected independently of each other are connected in the axial direction of the flexible sheath 7. Is provided on a first finger rest 11 slidably provided on the
The second finger hook 12 is fixedly provided on the flexible sheath 7. A high-frequency power cord (not shown) is connected to the contact pin 13.

Accordingly, the elastic opening / closing member 2 can be opened / closed by sliding the first finger hook 11 with respect to the second finger hook 12, and a pair of contact pins are provided via the conductive wire 3 and the elastic opening / closing member 2. Since the electrode 13 and the pair of electrodes 1 are electrically connected, as shown in FIG. 5, a high-frequency current can be applied to the tissue 100 sandwiched between the pair of electrodes 1 to cauterize and coagulate.

As shown in FIG. 6, when the tissue 100 sandwiched between the pair of electrodes 1 is thin, such as a blood vessel, even if the tissue 100 is collapsed by cauterization, the elasticity is low. Opening / closing member 2 is a member 1 for ensuring insulation between electrodes
Since the pair of electrodes 1 do not come into contact with each other by contact with 0, high-frequency treatment can be performed safely.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG. The mirror 30 may be directly inserted into and removed from the treatment instrument insertion channel 31. 32 is an observation window.

The inter-electrode insulation securing member 10 may be attached near the edge of the facing surface of one or both electrodes 1 as shown in FIG. 8, or as shown in FIG. The inter-electrode insulation securing member 10 may be formed by a part of the electric insulation coating 2a that covers the elastic switching member 2.

The electrode 1 may have a needle shape or another shape as shown in FIG. 9, and the shape and material of the elastic opening / closing member 2 are not limited to those in the above embodiment.

[0029]

According to the present invention, when the opening / closing member is completely closed, the contact between the two electrodes, whose opposite surfaces are exposed, is prevented by the inter-electrode insulation securing member, so that use under poor conditions is achieved. Even in the case of a state or an erroneous operation, an endoscopic high-frequency treatment can be performed safely without short-circuiting of both electrodes.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a distal end portion of a bipolar high frequency treatment instrument for an endoscope according to a first embodiment of the present invention in a closed state.

FIG. 2 is a side sectional view of the distal end portion of the bipolar high frequency treatment instrument for an endoscope according to the first embodiment of the present invention in an open state.

FIG. 3 is a cross-sectional view of the bipolar high frequency treatment device for an endoscope according to the first embodiment of the present invention, taken along line III-III in FIG. 1;

FIG. 4 is a side cross-sectional view of an operation section of the bipolar high-frequency treatment instrument for an endoscope according to the first embodiment of the present invention.

FIG. 5 is a schematic view of a distal end portion of the bipolar high frequency treatment device for an endoscope according to the first embodiment of the present invention in a used state.

FIG. 6 is a schematic view of a distal end portion of the bipolar high frequency treatment device for an endoscope according to the first embodiment of the present invention in a used state.

FIG. 7 is a side sectional view of a distal end portion of a bipolar high frequency treatment device for an endoscope according to a second embodiment of the present invention.

FIG. 8 is a side sectional view of a distal end portion of a bipolar high frequency treatment instrument for an endoscope according to a third embodiment of the present invention.

FIG. 9 is a side sectional view of a distal end portion of a bipolar high frequency treatment device for an endoscope according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrode 2 Elastic opening / closing member 2a Electrical insulation coating 7 Flexible sheath 10 Interelectrode insulation ensuring member

Claims (3)

[Claims] 1. An endoscope in which electrodes made of a conductive member are arranged at respective distal ends of a pair of opening / closing members which are opened / closed by remote operation from a base end side, in a state where the electrodes are electrically insulated from each other. In the bipolar high-frequency treatment instrument, the pair of electrodes are formed by exposing opposing surfaces, respectively, and are made of an electrical insulating material that prevents contact between the pair of electrodes when the opening / closing member is completely closed. A bipolar high-frequency treatment instrument for an endoscope, wherein a member for securing insulation between electrodes is provided. 2. The bipolar high-frequency treatment instrument for an endoscope according to claim 1, wherein said inter-electrode insulation securing member protrudes from a base end side between said pair of opening and closing members. 3. The endoscope bipolar high frequency treatment device according to claim 1, wherein the inter-electrode insulation securing member is formed on one or both of the pair of opening / closing members, or on one or both of the pair of electrodes. .