JP2009279210A - High-frequency treatment instrument for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-frequency treatment instrument which is free from an entanglement of cord even when the operation part is rotated for rotating the tip. <P>SOLUTION: This instrument comprises a flexible tube inserted in a body cavity, an operation wire which is freely inserted back and forth in the flexible tube, a treatment part mounted at the tip of the operation wire for treating an affected part by applying high-frequency current, a high-frequency current applying part which is directly attached to the operation wire and applies the high-frequency current, and an operation part which is added to the base end part of the flexible tube for operating the treatment part via the operation wire, and the operation part has an operation wire insertion hole for inserting the operation wire and a slit part which is penetrated to the orthogonal direction to the axial line of the operation part while it is mounted over the predetermined area to the axial line direction and the operation wire is freely moved back and forth inside, and it has a rotary operation part which rotates around the axial line independently from the high-frequency current applying part while it rotates together with the treatment part via the operation wire and a first operation auxiliary part which is supported to freely slide to the axial line direction of the rotary operation part and aids the operation of the treatment part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a high-frequency treatment instrument for an endoscope.

A medical high-frequency treatment instrument is treated using high-frequency current at a lesion site in the body.
In general, a high-frequency treatment instrument for an endoscope includes a flexible tube that is inserted into a body cavity, an operation wire that is inserted into the flexible tube so as to freely advance and retreat, and an affected part that is disposed at the distal end of the operation wire by applying a high-frequency current A treatment part that treats the treatment wire, a high-frequency application part that contacts the operation wire and applies a high-frequency current, and an operation part that is attached to the proximal end of the flexible tube and operates the treatment part via the operation wire. .

  The high-frequency treatment instrument for endoscope is connected to a high-frequency terminal of the operation unit by connecting a high-frequency power supply connection cord connected to the high-frequency power supply device to the treatment unit attached to the operation wire and the distal end portion of the operation wire A treatment such as separation of the affected part can be performed by the flow of the high-frequency current (see, for example, Patent Document 1).

  In recent years, an endoscopic high-frequency treatment instrument in which a treatment section has a rotation mechanism has been disclosed. This makes it possible to rotate the treatment section by rotating the operation section because the operation wire provided with the treatment section is fixed to the operation section. (For example, refer to Patent Document 2).

  In general, treatment of a high-frequency treatment instrument for an endoscope having a rotation mechanism is performed by two doctors, an operator who operates the endoscope up to the treatment site and an operator who operates the high-frequency treatment instrument. The person can rotate the distal end portion in the direction intended by the attending physician by rotating the operation portion.

  However, the endoscope high-frequency treatment instrument having the above-described treatment unit having a rotation mechanism has a high-frequency power connection cord connected to and fixed to the high-frequency terminal unit of the operation unit, so that the operation unit is rotated each time. In addition, there is a problem that the high-frequency power connection cord is entangled with the operation unit or the hand holding the operation unit.

  As an improvement measure, with the high-frequency power connection cord connected to the high-frequency terminal portion attached to the operation assisting portion (slider) supported by the operation portion, the high-frequency power connection cord is positioned substantially parallel to the back and forth direction of the operation assisting portion. A treatment instrument having an operation part provided with a high-frequency application terminal part to be extended is disclosed (for example, see Patent Document 3).

  As another improvement measure, an operation unit that is straightly connected and fixed to the proximal end portion of the operation wire in an axial direction with respect to the operation unit main body connected to the proximal end of the flexible sheath. Arranged so that it can be moved back and forth and rotated around the axis straight from the inside of the operation unit to the opposite side of the flexible sheath, electrically connected to the operation wire and around the high-frequency power connection cord and the axis There is disclosed a treatment instrument having an operation portion in which a high-frequency terminal portion that is rotatably connected is arranged straight at the protruding end portion of the operation portion so that the base end portion of the operation wire is aligned with the axial line position (for example, Patent Document 4). reference).

However, since any of the above treatment instruments has a high-frequency power connection cord connected behind the axis of the operation unit, there is a problem that delicate operation becomes difficult because the weight of the cord is greatly applied to the operation unit. Further improvement was desired.
JP 2000-093431 A JP 2005-058344 A JP 2004-188013 A JP 2005-198735 A

  An object of the present invention is to provide a high-frequency treatment instrument in which a high-frequency power connection cord does not wind around an operation unit when the operation unit is rotated to rotate a treatment unit provided at a distal end.

Such an object is achieved by the present invention described in the following (1) to (8).
(1) A flexible tube to be inserted into a body cavity, an operation wire inserted in the flexible tube so as to be able to advance and retreat, a treatment unit disposed at the distal end of the operation wire and treating the affected part by applying a high-frequency current, A high-frequency application unit that abuts on the operation wire and applies a high-frequency current; and an operation unit that is attached to the proximal end side of the flexible tube and operates the treatment unit via the operation wire,
The operation section is inserted through an operation wire insertion hole for inserting the operation wire and a direction orthogonal to the axis of the operation section and is provided over a predetermined range in the axial direction. Has a slit portion that can move forward and backward, and has a first rotation means at the tip portion that rotates independently of the high-frequency application portion around the axis, and is integrated with the treatment portion via the operation wire. A rotating operation unit that rotates,
A first operation assisting unit that is slidably supported in the axial direction of the rotation operation unit and assists the operation of the treatment unit;
A high-frequency treatment instrument comprising:
(2) The high-frequency treatment instrument according to (1), further including a second operation assisting unit that assists the operation of the first operation assisting unit on a proximal end side of the rotation operation unit.
(3) The high-frequency treatment instrument according to (1) or (2), further including a second rotation unit that rotates independently of the second operation assisting unit on a proximal end side of the rotation operation unit.
(4) A second rotating means receiving portion is provided inside the distal end side of the second operation assisting portion to allow the second rotating means attached to the operation rotating operation portion to rotate freely. (1) to (3) The high frequency treatment instrument according to any one of the above.
(5) The slits provided in the first operation assisting unit and the rotation operation unit have operation wire fixing means for fixing the operation wire, and the first operation assisting unit and the rotation operation unit. The high-frequency treatment instrument according to any one of (1) to (4), further including an operation wire fixing member that integrally rotates.
(6) The high-frequency application unit includes an electrode terminal unit connected to a high-frequency current cord, an elastic body that makes contact with the operation wire and optimizes application of the high-frequency current and sliding resistance in the axial direction of the operation wire, The high-frequency treatment instrument according to any one of (1) to (5), further comprising: a first rotation means receiving portion that allows the first rotation means attached to the rotation operation portion to rotate freely.
(7) The high-frequency treatment device according to any one of (1) to (6), wherein the surface of the high-frequency application unit is printed so that a rotation angle of the rotation operation unit can be determined.
(8) The high-frequency treatment instrument according to any one of (1) to (7), wherein the surface of the rotation operation unit is printed so that a rotation angle of the rotation operation unit can be determined.

  ADVANTAGE OF THE INVENTION According to this invention, when rotating an operation part in order to rotate the treatment part with which the front-end | tip was rotated, the high frequency treatment tool which a high frequency power supply connection cord does not wind around an operation part can be provided.

The present invention relates to a flexible tube inserted into a body cavity, an operation wire inserted in the flexible tube so as to freely advance and retreat, and a treatment unit disposed at the distal end portion of the operation wire to treat an affected area by applying a high-frequency current. A high-frequency application unit that applies a high-frequency current in contact with the operation wire, and an operation unit that is attached to the proximal end side of the flexible tube and operates the treatment unit via the operation wire,
The operation portion has an operation wire insertion hole for inserting the operation wire, and a slit portion that penetrates in a direction orthogonal to the axis of the operation portion and is provided over a predetermined range in the axial direction. And a rotation operation unit having a first rotation means that rotates around the axis independently of the high-frequency application unit at the distal end and rotates integrally with the treatment unit via the operation wire,
A first operation assisting unit that is slidably supported in the axial direction of the rotation operation unit and assists the operation of the treatment unit;
It is a high frequency treatment tool characterized by comprising.

  Hereinafter, embodiments of the high-frequency treatment device of the present invention will be described with reference to the drawings. In all the drawings, common constituent elements are denoted by the same reference numerals, and detailed description thereof will be appropriately omitted in the following description.

  FIG. 1 is a front view of an operation unit of a high-frequency treatment instrument according to an embodiment of the present invention. FIG. 2 is a bottom view of the operation unit of the high-frequency treatment instrument according to the embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2 of the operation unit of the high-frequency treatment instrument according to the embodiment of the present invention. FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5: is a front view of another form of the 1st operation assistance part in the high frequency treatment tool which becomes one Example of this invention. FIG. 6 is an enlarged front cross-sectional view of the high-frequency application portion of the high-frequency treatment instrument according to one embodiment of the present invention. FIG. 7 is a perspective view of one member of the two-operation wire fixing member used in the present invention. FIG. 8 is a front view showing a state in which the operation wire fixing member is assembled. 9 is a cross-sectional view taken along the line CC of FIG.

  As shown in FIG. 1 to FIG. 4, the high-frequency treatment device of the present invention includes a flexible tube 1 inserted into a body cavity, an operation wire 2 inserted in the flexible tube so as to freely advance and retract, and the operation wire 2. A treatment section (not shown) disposed at the distal end for treating a patient by applying a high-frequency current, a high-frequency application section 3 for applying a high-frequency current in contact with the operation wire 2, and a proximal end of the flexible tube 1 And a first operation auxiliary unit 7 for operating the treatment unit via the operation wire 2.

  Here, the treatment part used in the high-frequency treatment instrument of the present invention is not particularly limited as long as it has a link mechanism that requires a rotation operation, and a knife type or a scissor type that treats the affected part using the link mechanism. In addition, a conventionally used shape such as a snare can be used.

  The operation unit 4 penetrates in a direction orthogonal to the operation wire insertion hole 12 for inserting the operation wire 2 and the axis of the operation unit 4 and is provided over a predetermined range in the axial direction. The operating wire 2 has a slit portion 5 that can move forward and backward, and has a first rotating means 14 that rotates independently of the high-frequency applying portion 3 around the axis at the tip portion, and through the operating wire 2. A rotation operation unit 6 that rotates integrally with the treatment unit, and includes a first operation auxiliary unit 7 that is slidably supported in the axial direction of the rotation operation unit 6 and assists the operation of the treatment unit. Yes.

  The length of the slit portion 5 is not particularly limited. However, in the case of a high frequency treatment instrument in which a link mechanism is used and the sliding distance of the first operation auxiliary portion 7 is short, 3 to 8 cm is preferable, and the first operation such as a snare is performed. In the case of a high-frequency treatment instrument with a long sliding distance of the auxiliary portion 7, 8 to 15 cm is preferable.

  Although the shape of the first operation assisting unit 7 is not particularly limited, the shape shown in FIG. 5 is formed in a pair of rings for passing the index finger and middle finger of the operator, or the operator shown in FIG. A shape in which the middle finger of the hand and the index finger can be engaged is preferable.

  The slit portion 5 attached to the inside of the first operation assisting portion 7 and the rotation operation portion 6 has an operation wire fixing means 13 for fixing the operation wire 2, and the first operation assisting portion 7 and the rotation operation. An operation wire fixing member 8 that rotates the unit 6 integrally is provided.

  The operation wire fixing member 8 is composed of two symmetrical members as shown in FIGS. 7 to 9, and the two members are moved along the slit portion 5 from the base end side of the first operation auxiliary portion 7. It inserts in the inside of the 1 operation assistance part 7, and makes it integrate with the 1st operation assistance part 7 by making both members fit. A protrusion that engages with the first operation auxiliary portion 7 is formed on the distal end side of the operation wire fixing member 8, and an uneven portion that fits both members is formed on the proximal end portion side. However, the engaging method and the fitting method are not limited to the above methods.

Further, when the two operation wire fixing members 8 are combined as described above, the operation wire fixing member 8 is formed with the operation wire fixing means 13 by the concave portions which are symmetrical to each other. Similarly, the insertion hole 12 for inserting the operation wire 2 into the operation wire fixing means 13 is formed symmetrically in both members, and when combined, it becomes a substantially circular passage.
The method of fixing the operation wire 2 to the operation wire fixing means 13 is not particularly limited, and a part having a hole capable of fixing the operation wire 2 is fitted into the operation wire fixing part 13 and an adhesive is injected into the hole. Then, the operation wire 13 can be fixed, or the adhesive can be directly injected and fixed with the operation wire 2 inserted into the operation wire fixing means 13.

  By installing the operation wire fixing member 8 in the first operation auxiliary portion 7 and in the slit portion 5, the treatment portion and the first operation auxiliary portion are connected to the operation wire 2, and the first operation auxiliary portion 7 is The treatment section can be operated by sliding in the axial direction, and the treatment section can be rotated by rotating the rotation operation section 6.

  The shape of the wire fixing member 8 is not particularly limited, and may be a shape using means capable of fixing the operation wire 2 using a screw.

  In FIG. 6, the high-frequency application unit 3 is in contact with the electrode terminal unit 9 connected to a high-frequency current cord (not shown) and the operation wire 2 to apply a high-frequency current and to slide the operation wire 2 in the axial direction. And a first rotating means receiving portion 15 that allows the first rotating means 14 attached to the rotation operation portion 6 to rotate freely. By engaging the first rotating means 14 and the first rotating means receiving section 15, the high frequency applying section 3 and the rotation operating section 6 can rotate independently.

  In addition, by installing the elastic body 10 having a repulsive force suitable for this purpose in the high frequency application section 3, a high frequency current can be efficiently applied to the treatment section via the operation wire 2, and the operation wire The sliding resistance in the axial direction of 2 can be made moderate. In order to obtain the above effect, it is preferable to use a spring material as shown in FIG. 6 as an elastic body. Further, a mechanism for adjusting the resistance of the elastic body 10 to the operation wire 2 may be provided by using a screw or the like for the elastic body portion and adjusting the screw.

The material of the flexible tube 1 is not particularly limited, and both conductive and non-conductive materials can be used.
For example, stainless steel, steel, hard steel, copper and copper alloys, silver and silver alloys, platinum and alloys thereof, or gold can be used as the conductive material, and the conductive surface has an insulating material. May be coated with a thin film. Examples of the non-conductive material include fluorine resin, polyimide resin, polyethylene resin, polypropylene resin, polyurethane resin, polyamide resin, and polycarbonate resin. Among these, a fluororesin excellent in slidability with the forceps hole of the endoscope is preferable.

When the high-frequency current connection cord is connected to the electrode terminal portion 9 by having the rotation operation portion 6 that rotates independently of the high-frequency application portion 3, the high-frequency connection cord always has the electrode terminal portion 9 due to its weight. The rotation operation unit 6 and the treatment unit can be rotated without the high-frequency connection cord being wrapped around the rotation operation unit 6.
In the inventions disclosed in Japanese Patent Application Laid-Open Nos. 2004-188013 and 2005-198735, the cord is connected to the rear of the axis of the operation unit. By working, a large weight is applied to the operation unit, and delicate operation becomes difficult. On the other hand, in the high frequency treatment device of the present invention, as described above, the cord is connected in a suspended state to the electrode terminal portion on the distal end side of the operation portion, and the state can always be maintained. The difficulty can be removed and the operability of the operation unit can be improved.

  It is preferable that a second auxiliary portion 11 for assisting the operation of the first operation auxiliary portion 7 is provided on the base end side of the rotation operation portion 6. The shape of the second operation assisting portion 11 is not particularly limited, and may be a ring shape so that a thumb can be inserted.

  It is preferable that a second rotation means 16 that rotates independently of the second operation assisting portion is provided on the base end side of the rotation operation portion 6.

  In addition, a second rotation means receiving portion 17 is provided inside the distal end side of the second operation assisting portion 11 so that the second rotation means attached to the proximal end portion side of the rotation operation portion 6 is rotatable. Is preferred. By engaging the second rotation means 16 and the second rotation means receiving portion 17, the rotation operation portion 6 can be rotated independently of the second operation auxiliary portion 11.

  Even if the operator puts a thumb in the second operation assisting portion 11 and rotates the rotation operation portion 6, the second operation assisting portion 11 does not rotate together with the rotation operation portion 6. The operation assisting part 11 can be kept at a position that is easy for the operator to operate. Further, since the rotation operation unit 6 can be independently rotated in this way, a delicate rotation operation of the treatment unit can be easily performed.

  It is preferable that the surface of the high-frequency application unit 3 is printed so that the rotation angle of the rotation operation unit 6 can be determined. By doing so, it is possible to easily recognize the angle at which the assistant rotates the rotation operation unit 6.

  It is preferable that the surface of the rotation operation unit 6 is printed so that the rotation angle of the rotation operation unit 6 can be determined. By printing a certain angle on the surface of the rotation operation unit 6, the operator can easily recognize the angle at which the rotation operation unit 6 is rotated, and the treatment unit can be easily set to the angle intended by the attending physician. Can be rotated.

  Instead of printing a fixed angle on the surface of the rotation operation unit 6, the shape of the rotation operation unit 6 can be a cylinder, hexagonal column, octagonal column, or the like so that the operator can recognize the angle of rotation of the operation unit body. It doesn't matter.

  It is preferable that the rotation angle is printed on either the surface of the high-frequency application unit 3 or the surface of the rotation operation unit 6. It is more preferable that the angle adjustment can be discriminated numerically.

It is a front view of the operation part of the high frequency treatment tool for endoscopes which becomes one Example of this invention. It is a bottom view of the operation part of the high frequency treatment tool for endoscopes which becomes one Example of this invention. It is AA sectional drawing in FIG. 2 of the operation part of the high frequency treatment tool for endoscopes which becomes one Example of this invention. It is BB sectional drawing in FIG. 1 of the operation part of the high frequency treatment tool for endoscopes which becomes one Example of this invention. The front view of another form of the 1st operation assistance part in the high frequency treatment tool for endoscopes which becomes one Example of this invention. The expanded sectional view of the high frequency application part of the high frequency treatment tool for endoscopes used as one example of the present invention. FIG. 3 is an enlarged perspective view of an operation wire fixing member (one of two parts) used in the present invention. The front view of the operation wire fixing member (state which combined two components) used for this invention. CC sectional drawing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible tube 2 Operation wire 3 High frequency application part 4 Operation part 5 Slit part 6 Rotation operation part 7 1st operation assistance part 8 Operation wire fixing member 9 Electrode terminal part 10 Elastic body 11 2nd operation assistance part 12 Operation wire insertion hole 13 Operation wire fixing means 14 First rotating means 15 First rotating means receiving part 16 Second rotating means 17 Second rotating means receiving part

Claims (8)

A flexible tube to be inserted into a body cavity, an operation wire inserted in the flexible tube so as to be able to advance and retreat, a treatment portion disposed at a distal end portion of the operation wire to treat an affected area by applying a high-frequency current, and the operation wire A high-frequency application unit that applies a high-frequency current in contact with the operation unit, and an operation unit that is attached to the proximal end side of the flexible tube and operates the treatment unit via the operation wire,
The operation section is inserted through an operation wire insertion hole for inserting the operation wire and a direction orthogonal to the axis of the operation section and is provided over a predetermined range in the axial direction. Has a slit portion that can move forward and backward, and has a first rotation means at the tip portion that rotates independently of the high-frequency application portion around the axis, and is integrated with the treatment portion via the operation wire. A rotating operation unit that rotates,
A first operation assisting unit that is slidably supported in the axial direction of the rotation operation unit and assists the operation of the treatment unit;
A high-frequency treatment instrument comprising:   The high-frequency treatment instrument according to claim 1, further comprising a second operation assisting unit that assists the operation of the first operation assisting unit on a proximal end side of the rotation operation unit.   The high-frequency treatment instrument according to claim 1 or 2, further comprising a second rotation unit that rotates independently of the second operation assisting unit on a proximal end side of the rotation operation unit.   4. The second rotation means receiving portion that allows a second rotation means attached to the rotation operation portion to be rotatable inside the distal end side of the second operation assisting portion. 5. High frequency treatment tool.   The slit portion attached to the inside of the first operation assisting portion and the rotation operation portion has an operation wire fixing means for fixing the operation wire, and the first operation assisting portion and the rotation operation portion are integrated. The high-frequency treatment tool according to any one of claims 1 to 4, further comprising an operation wire fixing member that is rotated in an automatic manner.   The high-frequency application unit includes an electrode terminal unit connected to a high-frequency current cord, an elastic body that is in contact with the operation wire and optimizes application of the high-frequency current and sliding resistance in the axial direction of the operation wire, and the rotation operation. A high-frequency treatment instrument according to any one of claims 1 to 5, further comprising: a first rotation means receiving portion that allows the first rotation means attached to the portion to freely rotate.   The high-frequency treatment tool according to any one of claims 1 to 6, wherein the surface of the high-frequency application unit is printed so that a rotation angle of the rotation operation unit can be determined.   The high-frequency treatment tool according to any one of claims 1 to 7, wherein the surface of the rotation operation unit is printed so that a rotation angle of the rotation operation unit can be determined.

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