JP2001061855A - Cauterization apparatus for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a cauterization treatment to be carried out simply by attaching to the tip of an endoscope a hood having a cauterization electrode thereon. SOLUTION: This cauterization apparatus for an endoscope includes: a high frequency electrode 36 disposed at the tip of the endoscope 1 and made to carry a high-frequency current; a hood 32 freely removably attached to the tip of the endoscope 1; and a cauterization electrode 37 disposed on the hood 32 and contacted with tissue to cauterize the tissue. The cauterization electrode 37 is electrically connected to the high frequency electrode 36 when the hood 32 is attached to the tip of the endoscope 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope cauterizing apparatus for cauterizing body tissue using an endoscope.

[0002]

2. Description of the Related Art Conventionally, there has been known an endoscope cautery device capable of performing a hemostatic treatment on a bleeding site of a body tissue using an endoscope (Japanese Patent Application Laid-Open Nos. Hei 10-328202 and Hei 10-108). -328203). This endoscope cautery device includes a distal end hood detachably attached to the distal end of the endoscope so as to surround the distal opening of the suction channel of the endoscope from the outside. The distal end hood has an ablation electrode disposed along at least one of the inner peripheral surface and the distal end surface. In addition, an electric wire electrically connected to a high-frequency power supply extends from the cauterizing electrode.

When using the cauterizing instrument for an endoscope having such a structure, first, an electric wire extending from the cauterizing electrode is inserted into the suction channel of the endoscope through an opening on the distal end side of the suction channel, and an external external device is provided. Connect to the high frequency power supply and attach the tip hood to the tip of the endoscope. Next, the endoscope to which the tip hood is attached is inserted into the body, and the tip hood is opposed to the body tissue to be treated. Then, in this state, when the high-frequency power source is turned on and the cauterizing electrode provided on the tip hood is brought into contact with the bleeding site of the body tissue, the bleeding site is cauterized and blood is coagulated.

[0004]

By the way, in the cauterizing device for an endoscope, an electric wire must be inserted into a thin suction channel having a diameter of several millimeters when used. This operation is extremely complicated and imposes a great burden on the operator.

[0005] In the cauterizing device for an endoscope,
When not in use, the distal hood is removed from the distal end of the endoscope, and the electric wire extending from the cauterizing electrode of the distal hood is removed from the suction channel. But in this case,
There is a problem that it is not easy to store the wires extending from the tip hood.

The present invention has been made in view of the above circumstances, and an object of the present invention is to perform an ablation procedure simply by attaching a hood having an ablation electrode to the end of an endoscope. An object of the present invention is to provide an ablation device for an endoscope.

[0007]

According to a first aspect of the present invention, there is provided an ablation apparatus for an endoscope provided at a distal end of an endoscope and supplied with a high-frequency current. A high-frequency electrode, a hood removably attached to the end of the endoscope, and a cautery electrode provided on the hood and in contact with tissue to cauterize the tissue, wherein the cautery electrode is When a hood is attached to the end of the endoscope, the hood is electrically connected to the high-frequency electrode.

According to a second aspect of the present invention, there is provided a cauterizing apparatus for an endoscope provided at a distal end of an electronic endoscope provided with an imaging device, wherein a high-frequency electrode is supplied with a high-frequency current; A high-frequency transmission line that transmits a high-frequency current to the high-frequency electrode, and is provided around the high-frequency transmission line at least in the vicinity of the imaging device, and electrically insulates the high-frequency current transmitted by the high-frequency transmission line. An insulating member, a hood detachably attached to a tip of the electronic endoscope, and a cautery electrode provided on the hood and brought into contact with tissue to cauterize the tissue, Is characterized by being electrically connected to the high-frequency electrode when the hood is attached to the tip of the electronic endoscope.

According to a third aspect of the present invention, an ablation device for an endoscope is provided at a distal end of an endoscope having an observation optical system.
A high-frequency electrode through which a high-frequency current is supplied, a hood detachably attached to the end of the endoscope, and a cautery electrode provided on the hood and in contact with tissue to perform ablation treatment on the tissue, The ablation electrode is electrically connected to the high-frequency electrode when the hood is attached to the distal end of the endoscope, and is located within an observation field of view by the observation optical system.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of the present invention. As illustrated, the ablation device for an endoscope according to the present embodiment is applied to an electronic endoscope 1.

As shown in FIG. 2, the electronic endoscope 1 comprises:
It comprises an elongated insertion section 2 inserted into a body cavity, an operation section 3 provided continuously on the hand side of the insertion section 2, and a universal cord 4 extended from the operation section 3. The universal cord 4 processes an electric signal from a later-described solid-state imaging device 33 (see FIG. 1) provided in the insertion section 2 to process the monitor 5
And a light source device (not shown) for supplying illumination light to the electronic endoscope 1.

The insertion section 2 includes a flexible tube 9, a bendable tube 8 connected to the distal end of the flexible tube 9, and a bendable tube 8.
And a rigid distal end 7 connected to the distal end. At the base end side of the flexible tube section 9, a high-frequency power supply connection section 14 to which a high-frequency transmission line 15 described later is electrically connected is provided.
A connection line 38 extending from a high-frequency power supply 41 is detachably connected to the high-frequency power supply connection portion 14.

As shown in FIG. 1, the distal end portion 7 has a main body member 11 made of metal. The lower part of the main body member 11 in the drawing is cut out in an arc shape. A cylindrical insulating member 26 having an outer peripheral surface having a curvature that matches the shape of the notch is fitted to the distal end side of the notch 39 cut in an arc shape. The insulating member 26 is buried at the front end side of the cutout portion 39 to form the front end side portion of the main body member 11 in a cylindrical shape. A distal end cover 22 made of an electrically insulating material is densely fitted on the distal end of the main body member 11 so as to cover the distal end surfaces of the main body member 11 and the insulating member 26.

The bending tube portion 8 has a plurality of cylindrical bending pieces 17 arranged along the longitudinal direction. Curved piece 17
Are rotatably connected to each other via a pivot pin 49. The distal end side of the bending piece 17 </ b> A positioned at the forefront is fitted to the outer peripheral surface on the base end side of the main body member 11. In this case, the bending piece 17A is fixed to the main body member 11 in a state in which an insulating paint or the like is applied and is electrically insulated from the main body member 11.

A net tube 24 is fitted around the outer circumference of the bending pieces 17. This mesh pipe 24 is a state-of-the-art bending piece 17.
A extends from a substantially central portion of A toward the base end of the bending tube portion 8 and is electrically connected to the metal portion of each bending piece 17. On the outer periphery of the mesh tube 24, an electrically insulating mantle tube 23 forming the outer skin of the insertion portion 2 is attached. The distal end of the mantle tube 23 is placed over the outer peripheral surface of the main body member 11 beyond the distal end of the mesh tube 24, and
The main body member 1 is held by the thread 52 in a state in which
Fixed to 1.

At a substantially central portion of the insulating member 26, a through hole 10 extending linearly is formed. Also, this through hole 1
A high-frequency electrode 36 constituting the ablation device for an endoscope according to the present embodiment is provided on a front surface portion of the distal end cover 22 facing the zero. The high-frequency electrode 36 is exposed on the front surface (outer surface) and the back surface (the surface facing the through hole 10) of the tip cover 22.

An electrically insulating pipe 13 is fitted and fixed to the through hole 10 of the insulating member 26 so as to communicate therewith. The base end of the pipe 13 protrudes toward the base end of the notch 39, and the channel tube 12 is connected to the protruding end. Channel tube 12
Extends to the high-frequency power supply connection portion 14 provided on the base end side of the flexible tube portion 9 and forms an insertion passage through which the high-frequency transmission line 15 connected to the high-frequency power supply connection portion 14 is inserted.

In the channel tube 12, a high-frequency transmission line 15 constituting an ablation device for an endoscope according to the present embodiment is inserted through the entire length thereof. The tip of the high-frequency transmission line 15 is fixed to the high-frequency electrode 36 with solder or the like. Further, the base end of the high-frequency transmission line 15 is connected to the high-frequency power supply connection section 14 (see FIG. 2).

As shown in FIG. 2, the high-frequency transmission line 15
Is connected to one output terminal of a high-frequency power supply 41 via a connection line 38 connected to the high-frequency power supply connection section 14 and the first cord 40. A second cord 42 and a feedback cord 43 are connected to the other output terminal of the high-frequency power supply 41, respectively. The second cord 42 is connected to a body electrode 44 that contacts the patient over a large area, and the return cord 43 is connected to a feedback circuit 44 provided in the electronic endoscope 1. It is connected to the mesh tube 24 inside the mantle tube 23.

As shown in FIG. 1, a through hole 50 is formed in the main body member 11 above the notch 39. The objective observation unit 21 is detachably mounted in the through hole 50. The objective observation unit 21 includes an objective lens group 31 and a solid-state imaging device 33.
And a substrate 34. Note that the distal end cover 22 is fitted and fixed to the main body member 11 after the objective observation unit 21 is mounted in the through hole 50.

Each lens constituting the objective lens group 31 includes:
It is hermetically bonded and fixed in a metal lens frame 16. The outer periphery of the lens frame 16 is provided with an electrically insulating insulating frame 18.
Is fitted. And the objective observation unit 21
The insulating frame 18 is removably attached to the main body member 11 by being fitted into the through hole 50 of the main body member 11.
In a state where the objective observation unit 21 is attached to the main body member 11, the distal end surface of the insulating frame 18 is flush with the distal end surface of the distal end cover 22. An annular groove 20 is formed on the outer peripheral surface of the insulating frame 18.
Is installed.

On the substrate 34, electronic components of an auxiliary circuit of the solid-state imaging device 33, for example, an amplifier 45 (see FIG. 2) for amplifying an output signal of the solid-state imaging device 33 formed by transistors, capacitors, resistors and the like are mounted. Have been. Further, a plurality of coaxial cables 35 formed of shielded wires are connected to the substrate 34.

As shown in FIG.
Is guided to the near side of the electronic endoscope 1 and is electrically connected to the video processing unit 6 via the universal cord 4. The video processing unit 6 includes a pre-processing unit 25 and a processing unit 27. The pre-processing unit 25 processes an electric signal from the solid-state imaging device 33 of the electronic endoscope 1 and sends the processed signal to the processing unit 27. Process part 2
7 forms a video signal based on the processing signal received from the pre-processing unit 25 and outputs this to the monitor 5. The pre-processing unit 25 is sufficiently insulated from the processing unit 27 that transmits signals by using optical coupling or the like. The process unit 27 is supplied with electric power from a commercial power supply 47.

As shown in FIG. 1, a metal shielding plate 28 is attached to a base end side opening of the through hole 50 of the main body member 11 so as to close the opening. In this case, the shielding plate 28 is bonded and fixed to the main body member 11 by a conductive adhesive 29. The shielding plate 28 is a coaxial cable 3
5 has a hole 28a from which the protection member 46 for protecting the coaxial cable 35 is fitted. Further, in order to shield the objective observation unit 21 surrounded by the main body member 11 and the shield plate 28 electrically connected to the main body member 11, the shield plate 28 includes a shield wire (inner conductor) covering the core wire (inner conductor) of the coaxial cable 35. (Outer conductor) 30.

A hood 32 constituting the cauterizing device for an endoscope of the present embodiment is detachably fitted to the distal end portion 7 of the electronic endoscope 1. The hood 32 is formed of rubber or the like, and has an ablation electrode 37 on its inner peripheral surface. The cautery electrode 37 comes into contact with the high-frequency electrode 36 of the distal end cover 22 when the hood 32 is fitted on the distal end portion 7. Further, the cautery electrode 37 extends to the tip of the hood 32 so as to be located within the field of view observed by the objective observation unit 21.

Next, the operation of the cauterizing device for an endoscope according to the present embodiment will be described.

First, the hood 32 is attached to the distal end 7 of the electronic endoscope 1. At this time, the cautery electrode 37 on the hood 32 side
Contacts the high-frequency electrode 36 on the electronic endoscope 1 side, and both electrodes 36 and 37 are electrically connected (see FIG. 1). Subsequently, the electronic endoscope 1 to which the hood 32 is attached is inserted into the body, and the hood 32 is positioned so as to face the affected tissue where the mucosal resection has been completed.

Next, by applying a suction force to the inside of the hood 32 through a suction port (not shown) provided at the distal end of the electronic endoscope 1, the affected tissue is sucked into the hood 32 and brought into contact with the cautery electrode 37. . And in this state,
The high-frequency power supply 41 is turned on, and a high-frequency current is supplied to the high-frequency electrode 36 via the high-frequency transmission line 15. Thus, the cautery electrode 37 electrically connected to the high-frequency electrode 36
A high-frequency current flows between the body electrode plate 44 and the cautery electrode 37.
The affected tissue brought into contact with the ablation is cauterized.

In this case, the objective observation unit 21 is surrounded and shielded by the main body member 11 and a shielding plate 28 electrically connected to the main body member 11, and transmitted by the high-frequency transmission line 15 near the solid-state image sensor 33. Since the generated high frequency is insulated by the insulating member 26, the electric signal from the solid-state imaging device 33 is not adversely affected by the high frequency. Further, since the cautery electrode 37 extends to the tip of the hood 32 so as to be located within the observation field of view of the objective observation unit 21, the cautery position of the diseased tissue can be confirmed on the monitor 5.

As described above, the ablation device for an endoscope according to the present embodiment includes a hood 32 detachably attached to the distal end portion 7 of the electronic endoscope 1 and a tissue for cauterizing the tissue. The hood 3 includes an ablation electrode 37 to be used, a high-frequency transmission line 15 for transmitting a high-frequency current, and a high-frequency electrode 36 to which a high-frequency current is supplied via the high-frequency transmission line 15.
Only the cauterizing electrode 37 is provided on the side of the electronic endoscope 1, and the high-frequency electrode 36 and the high-frequency transmission line 15 for supplying a high-frequency current to the cauterizing electrode 37 via this are provided on the side of the electronic endoscope 1.
The ablation electrode 37 and the high-frequency electrode 36 are electrically connected when 2 is attached to the distal end portion 7 of the electronic endoscope 1. Therefore, the hood 32 is connected to the electronic endoscope 1
The cautery treatment can be performed simply by attaching the cautery to the distal end portion 7, and the setting operation of the cautery device for the electronic endoscope 1 can be performed easily and in a short time. Further, since the high-frequency transmission line 15 is not connected to the hood 32, it is easy to store the hood 32 removed from the electronic endoscope 1.

In this embodiment, the cautery electrode 37 is used.
Extends to the tip of the hood 32 so as to be positioned within the field of view observed by the objective observation unit 21. for that reason,
The cautery position of the affected tissue can be confirmed on the monitor 5,
The cauterization procedure can be performed safely and reliably.

In the present embodiment, the objective observation unit 21 is surrounded and shielded by the main body member 11 and the shielding plate 28 electrically connected to the main body member 11. The high frequency transmitted by the wire 15 is insulated by the insulating member 26. Therefore, the electric signal from the solid-state imaging device 33 does not need to be adversely affected by the high frequency.

In this embodiment, the notch 39 of the main body member 11 is filled with the insulating member 26, and the channel tube 1 is inserted into the insulating member 26 via the pipe 13.
2 is connected, but the notch 39 of the main body member 11 is connected.
Is filled with a conductive member.
The channel tube 12 may be connected via 3. However, in this case, the pipe 13 must be formed of an insulating material, and the pipe 13 needs to be located near the solid-state imaging device 33.

In the present embodiment, the cautery electrode 37 is provided on the inner peripheral surface of the hood 32, and the affected tissue is sucked into the hood 32 by suction so as to contact the cautery electrode 37. The cauterizing electrode 37 is the hood 32
If it is located at the tip or the outer peripheral surface of the hood 32 (for example, as shown in FIG. 4 to be described later) and is exposed to the outside, the tip of the hood 32 is pressed against the affected tissue without aspirating the affected tissue. Action may be taken.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, the high-frequency electrode 36 is provided on the side of the distal end portion 7 of the electronic endoscope 1. Specifically, a high-frequency electrode 36 is provided on the side surface of the tip cover 22, and the through-hole 1 is provided.
No. 0 extends laterally so as to face the high-frequency electrode 36. Since the other configuration is the same as that of the first embodiment, the same reference numerals are given and the description is omitted.

FIG. 4 shows another configuration of an ablation device for an endoscope. In this configuration, the cautery electrode 37 is provided on the outer peripheral surface of the hood 32. Since the other configuration is substantially the same as that of the first embodiment, the same reference numerals are given and the description is omitted.

According to the technical contents described above, various configurations as described below can be obtained.

1. A high-frequency electrode provided at the tip of the endoscope; an endoscope hood detachably provided at the tip of the endoscope; and an endoscope hood provided at the endoscope hood, wherein the endoscope hood is provided at the tip of the endoscope. An ablation electrode that is electrically connected to the high-frequency electrode when attached to the endoscope.

2. A high-frequency electrode provided at the tip of the electronic endoscope, and an insulating member that insulates high-frequency waves provided at least in the vicinity of the imaging device around wires that electrically connect the high-frequency electrode and an external high-frequency generator, An endoscope hood detachably provided at the end of the endoscope; and an endoscope hood provided on the endoscope hood, and electrically connected to the high-frequency electrode when the endoscope hood is attached to the end of the endoscope. An ablation electrode connected to the endoscope.

3. A high-frequency electrode provided at the tip of the endoscope; an endoscope hood detachably provided at the tip of the endoscope; and an endoscope hood provided at the endoscope hood, wherein the endoscope hood is provided at the tip of the endoscope. An ablation electrode that is electrically connected to the high-frequency electrode when attached to, the ablation electrode,
An endoscope cautery device arranged to be located in an observation range of an observation optical system of an endoscope.

4. 2. The endoscope cauterization device according to claim 1, wherein the high-frequency electrode provided at the distal end of the endoscope is provided at a front end of the distal end of the endoscope. 5. 2. The endoscope cauterization device according to claim 1, wherein the high-frequency electrode provided at the distal end of the endoscope is provided on an outer peripheral surface of the distal end of the endoscope. 6. 2. The endoscope cauterization device according to claim 1, wherein the cautery electrode provided on the endoscope hood is provided on an inner peripheral surface of the hood. 7. 2. The endoscope cautery device according to claim 1, wherein the cauterizing electrode provided on the endoscope hood is provided on an outer peripheral surface of the hood. 8. 2. The endoscope ablation device according to claim 1, wherein the endoscope is an electronic endoscope.

[0043]

As described above, according to the ablation device for an endoscope of the present invention, the ablation treatment can be performed simply by attaching the hood having the ablation electrode to the distal end of the endoscope.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an endoscope cauterizing apparatus according to a first embodiment of the present invention and an endoscope to which the apparatus is applied.

FIG. 2 is a system configuration diagram of the endoscope cautery apparatus and the endoscope of FIG. 1;

FIG. 3 is a cross-sectional view of a main part of an endoscope ablation device according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part showing another configuration of the endoscope cautery device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electronic endoscope 32 ... Hood 36 ... High frequency electrode 37 ... Cauterization electrode

Claims (3)

[Claims] 1. A high-frequency electrode provided at a distal end of an endoscope and supplied with a high-frequency current, a hood detachably attached to the distal end of the endoscope, and provided on the hood to cauterize a tissue An ablation electrode that is brought into contact with tissue, and wherein the ablation electrode is electrically connected to the high-frequency electrode when the hood is attached to the distal end of the endoscope. Cautery device for endoscopes. 2. A high-frequency electrode provided at an end of an electronic endoscope provided with an imaging device and supplied with a high-frequency current, and a high-frequency transmission provided on the electronic endoscope and transmitting a high-frequency current to the high-frequency electrode A wire, an insulating member provided around the high-frequency transmission line at least in the vicinity of the imaging device, and electrically insulating a high-frequency current transmitted by the high-frequency transmission line; A hood that is freely attached, and an ablation electrode that is provided on the hood and is brought into contact with the tissue to perform ablation treatment on the tissue. The ablation electrode includes a hood attached to a tip of the electronic endoscope. A cauterizing device for an endoscope, wherein the cauterizing device is electrically connected to the high-frequency electrode when it is performed. 3. A high-frequency electrode provided at a tip of an endoscope provided with an observation optical system and supplied with a high-frequency current, a hood detachably attached to the tip of the endoscope, and a hood provided on the hood. An ablation electrode that is brought into contact with the tissue to perform ablation treatment on the tissue, wherein the ablation electrode is electrically connected to the high-frequency electrode when the hood is attached to the distal end of the endoscope. And an ablation device for an endoscope, wherein the ablation device is located within an observation field of view by the observation optical system.