JP4135875B2 - Endoscope additional treatment tool guide - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope treatment tool guide for allowing an endoscope to be used in a state where treatment instrument insertion channels are temporarily increased.
[0002]
[Prior art]
One or two treatment instrument insertion channels for inserting a treatment instrument are incorporated in the endoscope.
[0003]
However, depending on the situation, another treatment instrument insertion channel may be required. In such a case, the additional treatment instrument guide is used along the outer surface of the insertion portion of the endoscope. To do.
[0004]
In such a treatment instrument guide for an endoscope, a bending portion similar to the bending portion provided in the vicinity of the distal end of the insertion portion of the endoscope is provided in the vicinity of the distal end. It can be bent remotely by operating the arranged operation member.
[0005]
The hand holding portion has the same structure as the operation portion of the endoscope, and when the operation lever is turned, the pulley rotates and the bending operation wire is pulled.
[0006]
[Problems to be solved by the invention]
However, when the hand holding portion of the additional treatment instrument guide has the same structure as the operation portion of the endoscope, two endoscope-like operation portions are arranged and operated simultaneously. Therefore, the handling is very troublesome.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an additional treatment instrument guide for an endoscope that is easy to handle and handle easily.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a treatment instrument guide for an endoscope according to the present invention has a hand holding portion connected to a proximal end of a flexible tube provided with a treatment instrument insertion path at a substantially axial position over the entire length. In a treatment instrument guide for an endoscope, in which a bending portion formed near the distal end of the flexible tube is bent by remote operation from the proximal holding portion, the proximal holding portion is connected to the proximal end portion of the flexible tube. The treatment instrument insertion passage is arranged to penetrate straight from the hand holding part to the flexible tube, and the operation member arranged in the hand holding part is disposed on the axis of the hand holding part. The bending portion is bent by performing a sliding operation in the direction.
[0009]
If a return spring is provided to urge the operating member to return to the standby position and the bending portion is kept straight when no operating force is applied to the operating member, the bending operation can be performed. It becomes easier.
[0010]
In addition, a check stopper is provided to prevent the operating member from returning from the arbitrary position to the standby state, and when the operating force on the operating member is released, the bending portion maintains the angle at the time of release. This makes it very easy to use depending on the application.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the overall configuration of an additional treatment instrument guide 10 according to the first embodiment of the present invention, and is located at a substantially axial position in a flexible flexible tube 20 having an outer diameter of about 3 to 5 mm, for example. A treatment instrument insertion channel 21 (treatment instrument insertion passage) made of a tetrafluoroethylene resin tube or the like is inserted through the entire length.
[0012]
The configuration of the flexible tube 20 is the same as the insertion portion of a general endoscope. For example, a mesh tube is coated on the outer periphery of a spiral tube made of a thin stainless steel strip, and a flexible outer tube is formed on the outer surface thereof. It is comprised by covering.
[0013]
A portion in the vicinity of the distal end of the flexible tube 20 is a curved portion 22 that is bent by a remote operation from a proximal holding portion 30 connected to the proximal end of the flexible tube 20, and this portion is enlarged and illustrated in FIG. 2. Has been.
[0014]
The configuration of the bending portion 22 is the same as the bending portion of a general endoscope. For example, a bending tube formed by connecting a plurality of short cylindrical ring-shaped rings made of stainless steel pipes with a rivet or the like. The outer circumference is covered with a mesh tube and the outer surface is covered with a rubber outer tube.
[0015]
In this embodiment, there is only one bending operation wire 23 for bending the bending portion 22, the distal end of the bending operation wire 23 is locked to the distal end portion of the bending portion 22, and the proximal end is the flexible tube 20. It passes through the inside and reaches the hand holding unit 30.
[0016]
In the flexible tube 20, a tightly wound guide coil 24 that guides the bending operation wire 23 through the bending operation wire 23 is inserted and disposed over the entire length, and the distal end of the guide coil 24 is located at the rear end of the bending portion 22. The intermediate portion of the guide coil 24 is fixed and disposed in a free state without being fixed in the flexible tube 20.
[0017]
At the distal end of the bending portion 22, a cylindrical distal end cap 25 made of an electrically insulating resin ceramic or the like to which the distal end of the treatment instrument insertion channel 21 is connected and fixed is attached, and an internal passage of the treatment instrument insertion channel 21 is attached. Is open straight forward at the tip cap 25 with almost no step.
[0018]
A spiral groove is continuously formed in at least a portion of the outer peripheral surface of the treatment instrument insertion channel 21 located in the curved portion 22, and a reinforcing coil wire is wound around the spiral groove. It should be noted that a built-in object (such as an optical fiber bundle) other than the above-described members is not inserted into the flexible tube 20.
[0019]
FIG. 3 is an enlarged view of the hand holding portion 30, and a connection base 26 provided at the proximal end of the flexible tube 20 is screwed and fixed to a substantially cylindrical cylindrical main body 31. The proximal end of the treatment instrument insertion channel 21 that has passed straight through the axial position of the cylindrical main body 31 is straightly connected and fixed to the substantially cylindrical treatment instrument insertion cylinder main body 32 that is screwed together.
[0020]
The treatment instrument insertion cylinder main body 32 is formed with a treatment instrument passage hole 32a that communicates straightly with the treatment instrument insertion channel 21 at the axial position, and a treatment instrument insertion cap 32b is formed at the protruding end portion of the treatment instrument insertion hole 32a. A forceps plug 40 made of metal is detachably attached. Reference numeral 34 denotes a hook-shaped fixed finger hook attached to the treatment instrument insertion cylinder main body 32.
[0021]
A proximal end of the bending operation wire 23 is connected and fixed to a short cylindrical slide cylinder 35 that circumscribes the cylindrical main body 31 and is slidable in the axial direction by brazing or the like.
[0022]
In FIG. 3 (and FIG. 1), a standby state in which the slide cylinder 35 does not pull the bending operation wire 23 is illustrated in the right half, and the bending portion 22 is bent in the left half. A state in which the slide cylinder 35 pulls the bending operation wire 23 is illustrated.
[0023]
The slide cylinder 35 is always urged in the direction of being pushed forward by a return spring 36 made of a compression coil spring. In a standby state where no operating force is applied to the slide cylinder 35, the slide cylinder 35 is The curved portion 22 is straightened against the stopper 31a formed on the cylindrical main body 31 by the urging force of the return spring 36.
[0024]
As shown in FIG. 4 illustrating the IV-IV cross section in FIG. 3, a wire fixing portion 35 a to which the proximal end portion of the bending operation wire 23 is fixed partially protrudes inward on the slide cylinder 35. Thus, the cylindrical body 31 is loosely engaged in a linear groove 31b formed in a direction parallel to the axis. Therefore, the slide cylinder 35 can advance and retreat only in the axial direction, and the bending operation wire 23 is driven in the axial direction by the advance and retreat operation of the slide cylinder 35.
[0025]
The slide cylinder 35 is connected by a connection pin 37 to a substantially cylindrical operation cylinder 38 that is loosely packaged on the outer surface of the treatment instrument insertion cylinder main body 32. The front end portion of the connecting pin 37 is formed on the slide cylinder 35 so that the operation of the slide cylinder 35 is not hindered by screwing the screw portion of the connection pin 37 into the screw hole of the operation cylinder 38. The joint hole 35b is loosely inserted and engaged. However, as the operation, the slide cylinder 35 and the operation cylinder 38 are integrated.
[0026]
A hook-shaped operation finger hook 38a is integrally formed on the outer surface of the operation cylinder 38 so that the operation cylinder 38 is fitted with a member on the fixed finger hook 34 side so as to slide without play. The cylinder 38b is screwed and connected to the proximal end side of the operation cylinder 38.
[0027]
With such a configuration, as indicated by an arrow A in FIG. 1, when the operation finger hook 38 a is pulled toward the fixed finger hook 34 with the fingers of the hand, the bending operation wire 23 is pulled thereby, and the bending portion 22 is moved to two points. Bend as shown by the dashed line.
[0028]
When the finger is released from the operation finger hook 38a in this state, as indicated by the arrow B, the operation finger hook 38a is returned to the standby state by the urging force of the return spring 36, and the bending portion 22 becomes straight.
[0029]
The treatment instrument insertion passage having the treatment instrument insertion base 32b as an inlet and the distal end base 25 as an outlet is fully extended via a treatment instrument passage hole 32a and a treatment instrument insertion channel 21 formed in the treatment instrument insertion cylinder body 32. The distal end portion of the treatment instrument inserted straight from the treatment instrument passage hole 32a can be projected straight forward from the distal end cap 25.
[0030]
FIG. 5 shows a state in which the additional treatment instrument guide 10 of the above embodiment is used in combination with the endoscope 1, and the endoscope 1 has a bending portion at the distal end portion of the insertion portion 2. 2a is formed, and the bending operation knob 4 disposed in the operation unit 3 is remotely bent.
[0031]
A flexible tube 20 of the additional treatment instrument guide 10 is arranged along the insertion portion 2 of the endoscope 1. As indicated by a two-dot chain line, if the insertion portion 2 of the endoscope 1 and the flexible tube 20 of the additional treatment instrument guide 10 are passed through the same insertion guide 100, it is possible to easily do so. it can.
[0032]
In this way, the first treatment tool 91 can be passed through the treatment tool insertion channel of the endoscope 1 and the second treatment tool 92 can be passed through the additional treatment tool guide 10 to be used simultaneously. The hand holding unit 30 of the treatment instrument guide 10 can be configured to be significantly smaller and lighter than the operation unit 3 of the endoscope 1, so that it is easy to handle, an operation for bending the bending unit 22, etc. Is also very easy.
[0033]
FIG. 6 shows the hand holding portion 30 of the treatment instrument guide for an endoscope according to the second embodiment of the present invention, and prevents the operation cylinder 38 from returning from the arbitrary position to the standby state. Check stoppers 51 and 52 are provided. Other configurations are the same as those in the first embodiment.
[0034]
Specifically, ratchet teeth 51 are formed on a fixing ring 34 a provided so as to press and fix the fixed finger hook 34 to the treatment instrument insertion cylinder main body 32, and a ratchet claw 52 that engages with the ratchet teeth 51 includes: It is attached to a receiving cylinder 38b that slides integrally with the operation cylinder 38.
[0035]
With this configuration, when the operation cylinder 38 is operated so as to pull the bending operation wire 23, the operation is not restricted by the check stoppers 51 and 52, and when the operation force is released, the operation cylinder 38 is released. Is prevented by the check stoppers 51 and 52, and the bending portion 22 maintains the angle at the time of releasing the operating force, which makes it very easy to use depending on the application.
[0036]
As shown in FIG. 7, the pin 52a attached to the ratchet pawl 52 is configured to be movable along the oblique groove 38c formed in the receiving cylinder 38b, so that it is shown by a solid line in FIG. In addition, the engagement of the ratchet pawl 52 with the ratchet teeth 51 can be manually released arbitrarily to return the bending portion 22 to a straight waiting state.
[0037]
Note that a ratchet mechanism is not necessarily used as the check stopper, and various check mechanisms can be employed instead of the ratchet mechanism.
[0038]
【The invention's effect】
According to the present invention, the hand holding portion is configured in a substantially cylindrical shape that is straightly connected to the proximal end portion of the flexible tube, and the treatment instrument insertion path is arranged to penetrate straight from the hand holding portion to the flexible tube. At the same time, the bending part is bent by sliding the operation member arranged in the hand holding part from the standby position in the axial direction of the hand holding part, so the hand holding part of the additional treatment instrument guide is small and light Thus, the bending operation and other operations can be easily performed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of the overall configuration of an additional treatment instrument guide for an endoscope according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a portion near the tip of an additional treatment instrument guide for an endoscope according to a first embodiment of the present invention.
FIG. 3 is a longitudinal sectional view of a hand holding portion of an additional treatment instrument guide for an endoscope according to a first embodiment of the present invention.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3 of the first embodiment of the present invention.
FIG. 5 is an external view of a state in which the additional treatment tool guide for an endoscope according to the first embodiment of the present invention is used in combination with the endoscope.
FIG. 6 is a longitudinal sectional view of a hand holding portion of an additional treatment instrument guide for an endoscope according to a second embodiment of the present invention.
FIG. 7 is an enlarged cross-sectional view of a check stopper of an additional treatment instrument guide for an endoscope according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Additional treatment tool guide 20 Flexible tube 21 Treatment tool insertion channel (treatment tool insertion passage)
22 bending portion 23 bending operation wire 25 distal end cap 30 hand holding portion 31 cylindrical main body 32 treatment instrument insertion cylinder main body 32a treatment instrument passage hole (treatment instrument insertion passage)
32b Treatment tool insertion base 35 Slide cylinder 36 Return spring 38 Operation cylinder (operation member)
38a Operation finger rest 51 Ratchet teeth (check stopper)
52 Ratchet claw (check stopper)

Claims (3)

A proximal holding portion is connected to the proximal end of the flexible tube having a treatment instrument insertion path provided at the substantially axial position over the entire length, and a curved portion formed near the distal end of the flexible tube is remotely operated from the proximal holding portion. an addition treatment tool guiding member of the endoscope so as to bend by,
To the hand holding portion, straight fixedly linked substantially cylindrical tubular body is provided for the proximal portion of the flexible tube, the said biopsy channel from the cylindrical body is straight through disposed within the flexible tube, so that the bending portion bending operation wire by the operating member disposed in said hand held unit is operated to slide in the axial direction of the hand holding portion moves back and forth bends In what
A slide cylinder that is slidably circumscribed in the axial direction with respect to the cylindrical main body is provided, and a wire fixing portion to which a proximal end portion of the bending operation wire is fixed is formed in the cylindrical main body in a direction parallel to the axis. The front end of a connecting pin for connecting the operating member and the slide cylinder is provided so as to protrude partially inward from the slide cylinder so as to be loosely engaged in the linear groove formed. A treatment instrument guide for addition of an endoscope, which is engaged with an engagement hole formed at a depth not reaching the bending operation wire from the outer peripheral surface of the body toward the wire fixing portion . The internal view according to claim 1, wherein a return spring is provided to urge the operating member to return to the standby position, and the bending portion maintains a straight state when no operating force is applied to the operating member. Treatment tool guide for mirror addition. A check stopper is provided to prevent the operation member from returning from an arbitrary position to the standby state. When the operation force applied to the operation member is released, the bending portion substantially maintains the angle at the time of release. The treatment tool guide for addition of an endoscope according to claim 1.

Images