JP3554488B2 - Endoscope treatment instrument system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a treatment tool system for an endoscope that is used by being inserted into a treatment tool insertion channel of an endoscope.
[0002]
[Prior art]
The treatment tool of the endoscope is provided with a treatment member at the distal end and is inserted into a treatment instrument insertion channel of the endoscope, and is connected to a proximal end of the sheath portion to remotely operate the distal treatment member. However, there are not a few cases in which the sheath portion and the operation portion are made detachable in consideration of cleaning after use or partial replacement in the event of breakage.
[0003]
In such a conventional treatment tool system for an endoscope in which the sheath portion and the operation portion are made detachable, the sheath portions of various treatment tools can be connected to the same operation portion.
[0004]
[Problems to be solved by the invention]
As described above, the common operation section to which sheath portions of various treatment tools can be connected is provided with a high-frequency power supply connection terminal for connecting a high-frequency power supply cord when performing high-frequency treatment.
[0005]
Therefore, for example, when using a non-high-frequency treatment tool whose metal is exposed on the surface of the sheath, there is a possibility that a high-frequency current is erroneously supplied to cause a dangerous state. Generally, since the operation of the treatment tool is performed by an assistant, such a situation may occur due to lack of communication with the surgeon.
[0006]
Therefore, if the operation section of the high-frequency treatment instrument and the operation section of the non-high-frequency treatment instrument are made non-common so that they are completely incompatible, there is no possibility that such an unexpected situation will occur.
[0007]
However, even in such a case, in a treatment tool such as a so-called hot biopsy biopsy forceps which performs high-frequency treatment or only performs simple tissue sample collection, only a simple tissue sample is collected. Even in such a case, since the operation unit for high-frequency treatment is used, there is a possibility that danger may still occur due to erroneous supply of high-frequency current.
[0008]
Accordingly, an object of the present invention is to provide a highly safe treatment tool system for an endoscope in which the possibility of danger due to erroneous application of a high-frequency current is reduced while minimizing the types of operation units.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, an endoscope treatment tool system according to the present invention includes a sheath portion provided with a treatment member at a distal end and inserted into a treatment instrument insertion channel of an endoscope, and a distal end treatment member. An endoscope treatment instrument system having an operation section detachably connected to the base end of the sheath section for performing a manual operation, comprising: a high-frequency operation section provided with a high-frequency power supply connection terminal; Two types of non-high-frequency operation sections without terminals, a dual-use sheath that can be connected to both the high-frequency operation section and the non-high-frequency operation section, and a connection to the non-high-frequency operation section It is characterized by having two types of sheaths, which are non-high-frequency exclusive sheaths that can be connected to the high-frequency operation unit. The outer surface of the dual-purpose sheath portion may be covered with an electrically insulating member, and a conductive member may be exposed on the outer surface of the non-high-frequency dedicated sheath portion.
[0010]
In addition, in order to connect the operating portion and the sheath portion, a hole is formed in the operating portion side, and a connecting piece for inserting and removing the hole to be engaged is provided on the sheath side, The connecting piece provided in the dual-use sheath portion is formed in a shape that can be inserted into both the hole formed in the high-frequency operation portion and the hole formed in the non-high-frequency operation portion. The provided connecting piece may not be inserted into the hole formed in the high frequency operation section, and may be formed in a shape that can be inserted only into the hole formed in the non-high frequency operation section.
[0011]
Further, as the third sheath portion, a sheath for exclusive use of a high frequency that can be connected to the high-frequency operating portion but cannot be connected to the non-high-frequency operating portion may be provided. In this case, it is preferable that the outer surface of the high-frequency exclusive sheath is covered with an electrically insulating member.
[0012]
In addition, in order to connect the operating portion and the sheath portion, a hole is formed in the operating portion side, and a connecting piece for inserting and removing the hole to be engaged is provided on the sheath side, The connecting piece provided in the non-high frequency dedicated sheath portion cannot be inserted into the hole formed in the non-high frequency operation portion, and is formed into a shape that can be inserted only into the hole formed in the high frequency operation portion. It may be.
[0013]
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 treatment tool system for an endoscope according to a first embodiment of the present invention, in which treatment members 11 and 21 are provided at distal ends, and a sheath portion is inserted into a treatment tool insertion channel of the endoscope. 10 and 20, and operation units 100 and 200 detachably connected to the proximal ends of the sheath units 10 and 20 for remotely operating the distal treatment members 11 and 21.
[0014]
There are two types of operation units, a high-frequency operation unit 100 provided with a high-frequency power supply connection terminal 101 and a non-high-frequency operation unit 200 provided with no high-frequency power supply connection terminal.
[0015]
As the sheath, the dual-use sheath 10 that can be connected to both the high-frequency operation unit 100 and the non-high-frequency operation unit 200, and the sheath that can be connected to the non-high-frequency operation unit 200 but cannot be connected to the high-frequency operation unit 100 There are two types of non-high frequency dedicated sheath section 20.
[0016]
The non-high frequency dedicated sheath portion 20, for example, a conductive member such as a coil pipe in which a stainless steel wire is tightly wound with a fixed diameter is exposed on the outer surface, for example, a biopsy forceps, a three-claw grasping forceps, It constitutes a basket and the like.
[0017]
The dual-purpose sheath portion 10 constitutes, for example, a hot biopsy forceps, a snare for polyp resection, a basket, and the like, and the outer surface of the sheath is covered with an electrically insulating member such as a tetrafluoroethylene resin tube. It is characteristic. However, this includes both the case where the tightly wound coil pipe and the like are not disposed and the case where the coil coil is disposed inside the electrically insulating tube.
[0018]
Connection bases 12 and 22 for connecting to the operation units 100 and 200 are attached to the base end portions of the sheath portions 10 and 20 by forming only the connection portions thicker, and the connection bases 12 and 22 are selected. The connecting fixed cylinders 103 and 203 having the base passing holes 102 and 202 formed so as to pass through them are attached to the distal end portions of the operation units 100 and 200.
[0019]
The dual connection base 12 attached to the base end of the dual sheath section 10 is formed in a shape that can pass through both the high-frequency base passage hole 102 and the non-high-frequency base passage hole 202. Therefore, the dual use sheath section 10 can be connected to both the high-frequency operation section 100 and the non-high-frequency operation section 200.
[0020]
On the other hand, the non-high-frequency connection base 22 attached to the base end of the non-high-frequency dedicated sheath portion 20 is formed in a shape that can pass through the non-high-frequency base passage hole 202 but cannot pass through the high-frequency base passage hole 102. ing. Therefore, the non-high-frequency dedicated sheath section 20 can be connected to the non-high-frequency operation section 200 but cannot be connected to the high-frequency operation section 100. The details will be described later.
[0021]
FIG. 2 shows a high-frequency operation unit 100, and a first finger hook 105 for engaging an operator's thumb with a rear end of an operation unit main body 104 formed in an elongated rod shape from an electrically insulating plastic material. Are formed in an annular shape. The operation unit main body 104 has an elongated slit 108 formed over the entire length.
[0022]
Reference numeral 106 denotes a slider formed of an electrically insulating plastic and slidably attached to the operation unit main body 104 in the axial direction. A slider 106 for engaging the index finger and the middle finger of the operator is formed. Have been. The high frequency power supply connection terminal 101 is also provided on the slider 106.
[0023]
FIG. 3 shows an engagement portion of the slider 106 with the operation unit main body 104. Reference numeral 13 denotes an operation wire extending from a base end of the sheath 10 connected to the operation unit 100, and a stopper 13a having a diameter larger than the outer diameter of the operation wire 13 is formed at the base end.
[0024]
Reference numeral 111 denotes an electrically insulating block held in a state held by the slider 106 in the slit 108, and a stopper 13a is inserted into a bottomed hole formed therein.
[0025]
112 is an operation wire unlock button for fixing / releasing the proximal end of the operation wire relative to the slider 106, the slide shaft 113 which is connected in its axial position, stop portion 13a of the operating wire 13 is over-passing A slit 114 having a possible width is formed.
[0026]
The operation wire lock release button 112 is urged outward by a compression coil spring 115. If the operation wire lock release button 112 is pushed in against the urging force, the stop portion 13a slides to a position where it can pass through the slit 114. The shaft 113 is set, and the base end of the operation wire 13 can be disengaged from the slider 106.
[0027]
When the finger is released from the operation wire lock release button 112, the slide shaft 113 is set at a position where the stopper 13a cannot pass through the slit 114 as shown in FIG. The base end of the wire 13 is fixed to the slider 106.
[0028]
By operating the slider 106 in this state, the operation wire 13 is advanced and retracted, and the distal treatment member 11 at the distal end of the sheath 10 can be remotely operated.
[0029]
The high-frequency power supply connection terminal 101 is screwed into a terminal receiving member 109 formed of a conductive metal. By connecting a high-frequency power supply cord (not shown) to the high-frequency power supply connection terminal 101, the terminal receiving member 109, the slide shaft A high-frequency current can be supplied to the distal treatment member 11 via the operation wire 113 and the operation wire 13.
[0030]
FIG. 4 shows the non-high frequency operation unit 200. The operation unit main body 204, the first finger hook 205, and the slit 208 are the same as those of the high frequency operation unit 100. The second finger hook 207 is formed in a thread shape so that it can be visually identified at a glance from the high frequency operation unit 100. Reference numeral 212 denotes an operation wire lock release button.
[0031]
FIG. 5 shows an engagement portion of the slider 206 with the operation portion main body 204 of the non-high frequency operation portion 200, and has the same structure as the high frequency operation portion 100 except that no high frequency power supply connection terminal is provided. I have. 211 is an electrically insulating block, 213 is a slide shaft, 214 is a slit, and 215 is a compression coil spring.
[0032]
FIG. 6 shows a connection portion in a state where the sheath portions 10 and 20 and the operation portions 100 and 200 are connected. FIG. 7 shows a tip of the operation portion main body 104 (204) alone to which the sheath portions 10 and 20 are connected. The part is shown.
[0033]
The distal end portion of the operation section main body 104 (204) is divided into four from the end side by four slits 109 (209) radially formed at, for example, 90 ° intervals. A base fitting hole 116 (216) into which the connecting bases 12 and 22 of 10, 20 are fitted is formed.
[0034]
A peripheral projection 117 (217) is provided on the outer peripheral surface of the operation section main body 104 (204) at a position slightly away from the end surface, and as shown in FIG. 6, the peripheral projection 117 (217). An engagement cylinder 119 (219) that engages with the connection fixed cylinder 103 (203) with the lock as a stopper is fitted on the rear side of the circumferential projection 117 (217).
[0035]
The connection fixed barrel 103 (203) is attached to the end of the operation unit 100 (200) in a state where it is not moved in the axial direction by engaging with the engagement barrel 119 (219).
[0036]
The connection fixed cylinder 103 (203) can be rotated around the axis by, for example, 45 °, and the rotation-side click projection 120 (220) protruding from the inner peripheral surface is provided on the outer peripheral surface of the end of the operation unit main body 104 (204). Are stopped at the positions on both sides beyond the fixed-side click projections 118 (218) protruding from the base.
[0037]
As shown in FIG. 8, the high-frequency base passage hole 102 formed in the high-frequency connection / fixation cylinder 103 has an oval shape having a width A and a longitudinal diameter B as shown in FIG. The non-high frequency base passage hole 202 thus formed is a square having a side A as shown in FIG.
[0038]
The relationship between the magnitudes of A and B may be in the range of A <B <1.4A, preferably in the range of about 1.2A <B <1.3A. With such setting, as shown in FIG. 10, the longitudinal direction of the oval high-frequency base passage hole 102 is larger than the opposite side of the square non-high-frequency base passage hole 202, and the non-high-frequency base passage hole is large. 202 is smaller than the diagonal.
[0039]
On the other hand, as shown in FIG. 11, the cross-sectional shape of the dual-use connecting base 12 of the dual-use sheath portion 10 is formed by cutting a diagonal portion of a square having one side A with a circle having a diameter B. Therefore, the dual-purpose connection base 12 can pass through both the high-frequency base passage hole 102 and the non-high-frequency base passage hole 202.
[0040]
On the other hand, the cross-sectional shape of the non-high-frequency connection base 22 of the non-high-frequency dedicated sheath portion 20 is a square having a side A as shown in FIG. Therefore, the non-high-frequency connection base 22 cannot pass through the high-frequency base passage hole 102 but can pass only through the non-high-frequency base passage hole 202.
[0041]
Note that the dimensions A and B are formed by the tolerance on the plus side in the case of the dimension of the hole, and are formed by the tolerance on the minus side in the case of the shaft (the same applies hereinafter). Thus, the axis of dimension A passes through the hole of dimension A, and the axis of dimension B passes through the hole of dimension B.
[0042]
FIG. 13 is a cross-sectional view in a cross section perpendicular to the axis of the distal end portion of the high-frequency operation section 100. The cross-sectional shape of the base fitting hole 116 matches the high-frequency base passing hole 102 formed by a two-dot chain line. ing. Therefore, the dual-use connection base 12 that can pass through the high-frequency base passage hole 102 can be fitted into the base fitting hole 116.
[0043]
Then, after the dual-purpose connecting base 12 is passed through the high-frequency base passing hole 102 and is fitted into the base fitting hole 116, as shown in FIG. When the high frequency connection fixing cylinder 103 is rotated by 45 ° so as to get over the projection 118, the high frequency base passage hole 102 is rotated together therewith, so that the dual use base 12 cannot come out of the base fitting hole 116, and the dual use sheath The unit 10 is connected to the high frequency operation unit 100.
[0044]
Then, when the high-frequency connection and fixing cylinder 103 is rotated in the reverse direction to return to the original state shown in FIG. 13, the two-purpose connection base 12 is pulled out from the base fitting hole 116, and the two-use sheath part 10 is removed from the high-frequency operation part 100. be able to.
[0045]
FIG. 15 is a cross-sectional view in a cross section perpendicular to the axis of the distal end portion of the non-high frequency operation unit 200. The cross-sectional shape of the base fitting hole 216 is the same as that of the high-frequency operation unit 100, and the deep portion of the corner of the non-high-frequency base passage hole 202 is a space formed by the slit 215. A shaft that can pass through the hole 202 can be fitted into the base fitting hole 216. 218 and 220 are click projections on the fixed side and the rotation side.
[0046]
16 shows a state in which the non-high-frequency connection base 22 of the non-high-frequency dedicated sheath section 20 is connected to the non-high-frequency operation section 200, and FIG. 17 shows a two-way connection of the dual-use sheath section 10 to the non-high-frequency operation section 200. This shows a state in which the base 12 is connected.
[0047]
In any case, when the non-high-frequency connection / fixed cylinder 203 is rotated by 45 ° so that the rotation-side click projection 220 gets over the fixed-side click projection 218, the non-high-frequency base passage hole 202 rotates together therewith. The connecting base 22 or the connecting base 12 cannot be pulled out from the base fitting hole 216, and the non-high-frequency dedicated sheath 20 or the dual-use sheath 10 is connected to the non-high-frequency operating section 200.
[0048]
Then, if the non-high frequency connection fixing cylinder 203 is rotated in the reverse direction to return to the original state shown in FIG. 15, the non-high frequency connection base 22 or the dual use connection base 12 is pulled out from the base fitting hole 216, and the non-high frequency exclusive sheath is provided. The unit 20 can be removed from the non-high frequency operation unit 200.
[0049]
FIG. 18 shows an endoscope treatment tool system according to the second embodiment of the present invention. In addition to the system configuration of the above-described first embodiment, a high-frequency exclusive sheath portion is further provided as a third sheath portion. 30 is added.
[0050]
The high-frequency dedicated sheath portion 30 is a treatment tool of a type that is not used (or should not be used) when no high-frequency current is supplied, and is, for example, a high-frequency incision tool (for example, a so-called papillotome knife).
[0051]
The distal treatment member 31 is, for example, a single conductive wire swelling out of the sheath, and the outer surface coating of the sheath of the high-frequency exclusive sheath portion 30 is made of an electrically insulating member such as a tetrafluoroethylene resin tube. It is formed with.
[0052]
As shown in FIG. 19, the cross-sectional shape of the high-frequency connection base 32 attached to the base end of the high-frequency dedicated sheath portion 30 is an oval shape having the same size and shape as the high-frequency base passage hole 102.
[0053]
Therefore, as shown in FIG. 20, the high-frequency dedicated sheath portion 30 can be connected / disconnected to / from the high-frequency operation portion 100, but since the high-frequency connection base 32 cannot pass through the non-high-frequency base passage hole 202. , Cannot be connected to the non-high frequency operation unit 200.
[0054]
【The invention's effect】
According to the present invention, as the operation unit of the system, only two types of operation units are provided: a high-frequency operation unit provided with a high-frequency power supply connection terminal and a non-high-frequency operation unit not provided with a high-frequency power supply connection terminal. In contrast, a dual-purpose sheath that can be connected to both the high-frequency operation unit and the non-high-frequency operation unit, and a non-high-frequency dedicated sheath that can be connected to the non-high-frequency operation unit but cannot be connected to the high-frequency operation unit Since two types of sheaths are provided, there is no possibility to use a sheath that must not use high-frequency current by connecting it to the high-frequency operation unit, and it is possible to safely perform endoscopic procedures. it can.
[Brief description of the drawings]
FIG. 1 is a perspective view of a treatment tool system for an endoscope according to a first embodiment of the present invention.
FIG. 2 is a plan view of a high-frequency operation unit according to the first embodiment of the present invention.
FIG. 3 is a partial side sectional view of a high-frequency operation unit according to the first embodiment of the present invention.
FIG. 4 is a plan view of a non-high frequency operation unit according to the first embodiment of the present invention.
FIG. 5 is a partial side sectional view of a non-high frequency operation unit according to the first embodiment of the present invention.
FIG. 6 is a side sectional view of a connection portion between the operation unit and the sheath according to the first embodiment of the present invention.
FIG. 7 is a perspective view of a distal end portion of the operation unit according to the first embodiment of the present invention.
FIG. 8 is a perspective view of a distal end portion of the high-frequency connection fixed cylinder according to the first embodiment of the present invention.
FIG. 9 is a perspective view of a distal end portion of the non-high-frequency connection and fixing tube according to the first embodiment of the present invention.
FIG. 10 is a schematic diagram showing a high-frequency base passage hole and a non-high-frequency base passage hole according to the first embodiment of the present invention;
FIG. 11 is a cross-sectional view taken along a cross section perpendicular to the axis of the dual-use connection base according to the first embodiment of the present invention.
FIG. 12 is a cross-sectional view in a cross section perpendicular to the axis of the non-high frequency connection base according to the first embodiment of the present invention.
FIG. 13 is a cross-sectional view in a cross section perpendicular to the axis of the distal end portion of the high-frequency operation unit according to the first embodiment of the present invention.
FIG. 14 is a cross-sectional view perpendicular to the axis of a connecting portion of the first embodiment of the present invention in a state where the dual-use sheath is connected to the high-frequency operation unit.
FIG. 15 is a cross-sectional view in a cross section perpendicular to the axis of the distal end portion of the non-high frequency operation unit according to the first embodiment of the present invention.
FIG. 16 is a cross-sectional view in a cross section perpendicular to an axis of a connecting portion in a state where the sheath for exclusive use of non-high-frequency waves according to the first embodiment of the present invention is connected to the operating section for non-high-frequency waves.
FIG. 17 is a cross-sectional view in a cross section perpendicular to the axis of a connecting portion of the first embodiment of the present invention in a state where the dual-use sheath is connected to the non-high-frequency operating portion.
FIG. 18 is a perspective view of an endoscope treatment tool system according to a second embodiment of the present invention.
FIG. 19 is a cross-sectional view of a high-frequency connection base according to a second embodiment of the present invention in a cross section perpendicular to the axis.
FIG. 20 is a cross-sectional view in a cross section perpendicular to the axis of a connecting portion in a state where the sheath for exclusive use of high frequency according to the second embodiment of the present invention is connected to the operating portion for high frequency.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Dual use sheath part 12 Dual use connection base 20 Non-high frequency exclusive sheath part 22 Non-high frequency connection base 30 High frequency exclusive sheath part 32 High frequency connection base 100 High frequency operation part 101 High frequency power supply connection terminal 102 High frequency base passage hole 103 High frequency connection Fixed tube 200 Non-high-frequency operating section 202 Non-high-frequency base passage hole 203 Non-high-frequency connection fixed tube

Claims (5)

A sheath portion provided with a treatment member at the distal end and inserted into a treatment instrument insertion channel of an endoscope, and an operation detachably connected to a base end of the sheath portion for remotely operating the distal treatment member Endoscope treatment instrument system having a
A high-frequency operation unit provided with a high-frequency power connection terminal, and two types of operation units of a non-high-frequency operation unit not provided with a high-frequency power connection terminal,
It said a high frequency operation section and the non both high frequency operation section that allows connecting dual sheath portion, two types of non-high-frequency dedicated sheath portion that can not be connected to the high frequency operation section is connectable to the non-high-frequency operation unit If you are have a and the sheath portion,
A hole is formed in each of the operation parts to connect the operation parts and the sheath parts, and a connection piece for inserting and removing the engagement with the holes is provided on each of the sheath parts. And
The hole formed in the high-frequency operation section is an oval shape having a longitudinal diameter smaller than 1.4 times the width, and the hole formed in the non-high-frequency operation section is formed in the high-frequency operation section. A square with the width of the oval hole as one side,
The cross-sectional shape of the connecting piece formed in the dual-use sheath portion is a shape obtained by subtracting the dimensional tolerance from a shape obtained by cutting off the diagonal portion of the square with a circle having the same diameter as the longitudinal diameter of the oval shape. The cross-sectional shape of the connecting piece formed in the non-high frequency exclusive sheath portion is a square obtained by subtracting the dimensional tolerance from the above square,
As a result, the connecting piece provided in the dual-use sheath portion can be inserted into both the hole formed in the high-frequency operation portion and the hole formed in the non-high-frequency operation portion. provided the connecting piece can not be inserted into a hole formed in the high-frequency operation unit, an endoscope, wherein the insertable der Rukoto only into a hole formed in the non-high-frequency operation unit Treatment instrument system. The treatment tool system for an endoscope according to claim 1, wherein an outer surface of the dual-purpose sheath portion is covered with an electrically insulating member, and a conductive member is exposed on an outer surface of the non-high-frequency dedicated sheath portion. As a third sheath portion, claim 1 or 2 endoscope treatment instrument system according with a high frequency dedicated sheath portion that can not be linked to possible the non-high-frequency operation unit connected to the high frequency operation section. 4. The treatment tool system for an endoscope according to claim 3, wherein an outer surface of the high-frequency dedicated sheath portion is covered with an electrically insulating member. A hole is formed in the operation portion side to connect the operation portion and the sheath portion, and a connection piece for inserting and removing the engagement with the hole is provided on the sheath portion side, The connecting piece provided in the non-high frequency dedicated sheath portion cannot be inserted into the hole formed in the non-high frequency operation portion, and is formed in a shape that can be inserted only into the hole formed in the high frequency operation portion. The treatment tool system for an endoscope according to claim 3 or 4, wherein:

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