JP2004154245A - Two-channel endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-channel endoscope capable of easily and safely performing insertion into a celom and endoscopic treatment by setting the positional and directional relation of two treatment implements to the optimum state regardless of the bent state of an insertion part. <P>SOLUTION: A second treatment implement insertion channel 12 is arranged at a flexible cylindrical adaptor 10 freely detachable while arbitrarily changing the direction in a peripheral direction with respect to insertion parts 1, 2, and 3 where a first treatment implement insertion channel 11 is arranged. An optional bending part 13 capable of being remotely bent by pulling one operation wire 14 from a hand side is provided near the distal end of the second treatment implement insertion channel 12. Further, an energizing means 19 for energizing the operation wire 14 in the direction of pushing it from the hand side at all times is provided. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a two-channel endoscope provided with a plurality of treatment instrument insertion channels.
[0002]
[Prior art]
In general, the two-channel endoscope has a configuration in which two treatment tool insertion passages are disposed in an insertion portion, and two treatment tool protrusion ports are disposed in a distal end body provided at a distal end of the insertion portion ( For example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2000-37348, FIG.
[Problems to be solved by the invention]
FIG. 9 shows a state in which the treatment tools 101 and 102 are respectively protruded from the two treatment tool protrusion ports 11a and 12a of the conventional two-channel endoscope as described above to perform an endoscopic treatment. Reference numeral 3 denotes a tip main body, and 4 denotes an observation window.
[0005]
In such an endoscopic treatment using a two-channel endoscope, the relationship between the position and orientation of the two treatment tools 101 and 102 needs to be adapted to the type of treatment and the lesion site in the case, If not, the treatment may not be performed smoothly.
[0006]
Therefore, the inventor of the present invention provides an insertion portion in which the first treatment instrument insertion channel is arranged so that the relationship between the position and direction of the two treatment instruments can be set in an optimal state for each case. The second treatment instrument insertion channel is arranged on a flexible tubular adapter that can be freely changed in the circumferential direction and is detachable, and is remotely bent by pulling one operation wire from the hand side. A two-channel endoscope in which an arbitrary bent portion capable of being provided is provided near the distal end of the second treatment instrument insertion channel was invented, and a patent application was previously filed (Japanese Patent Application No. 2002-180087).
[0007]
However, in such a structure in which an arbitrary bending portion is bent by pulling one operation wire, when the flexible tubular adapter is bent together with the insertion portion, the operation wire inserted and arranged inside the flexible cylindrical adapter is bent. In some cases, the vehicle may be pulled by the frictional resistance of the intermediate portion.
[0008]
Then, the arbitrary bending portion is bent to some extent without performing any operation on the hand side, which hinders insertion into the body cavity, and the position and direction of the outlet of the second treatment instrument insertion channel fluctuates. In some cases, the guidance of the treatment tool may be hindered.
[0009]
Thus, the present invention sets the relationship between the positions and directions of the two treatment tools in an optimal state regardless of the bending state of the insertion portion, and easily and safely performs insertion into a body cavity and endoscopic treatment. It is an object of the present invention to provide a two-channel endoscope that can perform the operation.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a two-channel endoscope of the present invention has a first treatment instrument insertion channel inserted and arranged in a flexible insertion portion, and a first treatment instrument insertion channel outlet opening. Is disposed near the distal end of the insertion portion, and the second treatment device insertion channel is disposed on a flexible tubular adapter that can be freely turned in the circumferential direction with respect to the insertion portion to be detachable. An arbitrary bent portion that can be remotely bent by pulling one operation wire from the hand side is provided near the distal end of the second treatment instrument insertion channel, and the outlet of the second treatment instrument insertion channel is provided. In a two-channel endoscope in which a second treatment instrument projection opening, which is an opening, is disposed at the tip of an arbitrary bent portion, an urging means for constantly urging an operation wire from a hand side in a pushing direction is provided.
[0011]
Note that a stopper may be provided on the hand side that can arbitrarily set the movement limit position in the pushing direction of the operation wire.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
FIG. 3 shows the entire configuration of the two-channel endoscope, and FIG. 2 shows a state in which a tubular adapter 10 which is detachably fitted to the flexible tube 1 is not attached.
[0013]
As shown in FIG. 2, a two-dot chain line is provided at the distal end portion of the flexible insertion portion flexible tube 1 by remote operation from an operation portion 6 connected to the base end (hand side) of the insertion portion flexible tube 1. A curved portion 2 that bends is provided as shown by.
[0014]
A distal end main body 3 in which an observation window and the like are arranged is connected to a distal end of the bending portion 2, and an insertion portion is configured by the insertion portion flexible tube 1, the bending portion 2, and the distal end body 3. Reference numeral 7 denotes a bending operation knob for performing a bending operation.
[0015]
A first treatment tool insertion channel 11 made of, for example, a tetrafluoroethylene resin tube is inserted from the flexible insertion tube 1 to the inside of the curved portion 2, and an outlet of the first treatment tool insertion channel 11 is provided. A first treatment instrument protrusion port 11a, which is an opening, is formed in the distal end portion main body 3, and the first treatment instrument insertion port 11b is arranged near the lower end of the operation unit 6.
[0016]
As shown in FIG. 4 showing a cross section taken along the line IV-IV, the tubular adapter 10 is formed in an elongated tubular shape by using, for example, silicon rubber having elasticity. The configuration is such that a second treatment instrument insertion channel 12 is arranged along an annular portion 10 a that covers the outer peripheral surface of the flexible tube 1. In this embodiment, a configuration in which a slippery ethylene tetrafluoride resin tube or the like is inserted into the second treatment tool insertion channel 12 is adopted.
[0017]
Reference numeral 14 shown in FIG. 4 is a single operation wire arranged to be able to advance and retreat along the longitudinal direction of the tubular adapter 10 in order to bend an arbitrary bent portion 13 described later. It is loosely inserted into the attached guide coil 15.
[0018]
As shown in FIG. 2, a base end cap 10b is formed at a base end portion of the tubular adapter 10 so as to cover a vicinity of a connection portion between the insertion portion flexible tube 1 and the operation portion 6. A second treatment instrument insertion port 12b is arranged at an upper end portion of the end cap 10b.
[0019]
As shown in FIG. 3, the tubular adapter 10 is formed so as to cover almost the entire length of the flexible tube 1 so as to elastically and lightly tighten the flexible tube 1. The length of the annular portion 10a is set so as not to interfere with the bending portion 2 so that the bending operation of the bending portion 2 is not hindered.
[0020]
When the tubular adapter 10 thus configured is attached to the insertion section flexible tube 1, the cylindrical adapter 10 is rotated around the axis as indicated by the arrow A, so that the cylindrical adapter 10 is circumferentially arbitrary with respect to the insertion section flexible tube 1. It can be installed in the direction of.
[0021]
FIG. 5 is a front view of the insertion section in a state where the tubular adapter 10 is attached to the insertion section flexible tube 1, and the first treatment tool protrusion 11 a has a distal end alongside the observation window 4 and the illumination window 5. It is arranged on the distal end surface of the body 3.
[0022]
Since the second treatment tool protrusion port 12a is disposed at the distal end of the tubular adapter 10, the first treatment can be performed by rotating the tubular adapter 10 around the axis when the tubular adapter 10 is attached to the insertion portion flexible tube 1. The positional relationship of the second treatment tool protrusion port 12a with respect to the tool protrusion port 11a can be arbitrarily set.
[0023]
Returning to FIGS. 2 and 3, the distal end portion of the tubular adapter 10 is provided with an optional bent portion 13 at a position along the curved portion 2 when the annular portion 10 a is attached to the insertion portion flexible tube 1. The second treatment tool protrusion port 12a is disposed on the distal end surface of the arbitrary bent portion 13.
[0024]
An operation finger hook 16 for bending the arbitrary bending portion 13 is disposed at the base of the second treatment tool insertion port 12b, and the operation finger hook 16 is slid on the hand side as shown by the arrow B, On the distal end side, the arbitrary bending portion 13 bends in a predetermined direction as shown by the arrow C, and the opening direction of the second treatment tool outlet 12a changes. Reference numeral 18 denotes a fixed finger hook fixedly attached to the tubular adapter 10.
[0025]
As shown in FIG. 6, for example, the arbitrary bending portion 13 rotatably connects a number of node rings 131 with rivets 132 or the like, and connects a flexible tube forming the second treatment instrument insertion channel 12 to the inside thereof. When the operation wire 14, one end of which is connected to the tip of the arbitrary bending portion 13, is pulled from the hand side, the arbitrary bending portion 13 is inserted into each rivet 132 as shown by a two-dot chain line. Bend with the rotation axis.
[0026]
FIG. 1 shows a hand operation unit for pulling the operation wire 14 from the hand side of the tubular adapter 10. The hand operation unit communicates with the base end of the second treatment tool insertion channel 12, and A treatment tool insertion base body 20 is fixedly protruded near the upper end of the base end base 10b.
[0027]
A fixed finger hook 18 is fixedly attached near the upper end of the treatment instrument insertion base body 20, and a base end of the guide coil 15 is fixed to a lower end portion of the treatment instrument insertion base body 20.
[0028]
The operation finger hook 16 is fitted to the treatment instrument insertion base body 20 so as to be able to advance and retreat in the axial direction. The base end 14 a of the operation wire 14 is fixed to the operation finger hook 16 via the fixing pin 17, and the operation finger hook 16 is at the lower end position of the treatment instrument insertion mouthpiece main body 20 as shown by a solid line in FIG. 1. Sometimes, the arbitrary bending portion 13 is in a straight state.
[0029]
A compression coil spring 19 is mounted between the fixed finger rest 18 and the operation finger rest 16 in a constantly compressed state, and is urged in a direction in which the operation finger rest 16 is pressed to the lower end side. As a result, the operation wire 14 is constantly urged in the pushing direction from the hand side, and the arbitrary bending portion 13 maintains a straight state.
[0030]
Therefore, even if the flexible tubular adapter 10 is bent at the intermediate portion together with the insertion portion flexible tube 1 and a tensile force acts on the operation wire 14, the operation wire 14 is always completely pushed by the urging force of the compression coil spring 19. Since the bent state is maintained, the phenomenon that the arbitrary bending portion 13 bends against the operator's intention does not occur, which hinders the insertion into the body cavity or hinders the guidance of the treatment tool. There is no.
[0031]
Then, a finger is put on the operation finger rest 16 and the fixed finger rest 18, and the operation finger rest 16 is pulled up toward the fixed finger rest 18 against the urging force of the compression coil spring 19, whereby the operation wire 14 is pulled and the cylindrical adapter is pulled. The arbitrary bending portion 13 bends at the tip side of 10.
[0032]
As a result, as shown in FIG. 7, the rotation state of the tubular adapter 10 with respect to the insertion portion flexible tube 1 is set in accordance with the type of treatment and the lesion site in the case, and the bending portion 2 and the arbitrary bending portion The bending state of each part 13 is set, and the position and direction of the second treatment tool protrusion 12a with respect to the first treatment tool protrusion 11a are arbitrarily adjusted, so that the second treatment tool protrusion 12a is projected from the first treatment tool protrusion 11a. The relationship between the position and direction of the first treatment tool 101 and the second treatment tool 102 protruding from the second treatment tool outlet 12a can be optimized for the treatment operation of the case. .
[0033]
FIG. 8 shows a second embodiment of a hand operation unit for pulling the operation wire 14 from the hand side of the tubular adapter 10, and a screw rod protruding from the fixed finger hook 18 to the operation finger hook 16 side. By arbitrarily adjusting the stop position of the manual stopper nut 22 screwed to the screw 21, the movement limit position in the pushing direction of the operation wire 14 (that is, the movement limit position in the pushing direction of the operation wire 14) is arbitrarily set. Can be. 23 is a stopper for preventing the manual stopper nut 22 from dropping.
[0034]
With such a configuration, it is possible to maintain a state in which the arbitrary bending portion 13 is bent at an arbitrary constant angle, and to perform an operation of increasing the bending angle of the arbitrary bending portion 13 by the operation finger hook 16 as necessary. Therefore, depending on the situation of the case, the burden of the operator operating the operation finger rest 16 can be reduced.
[0035]
【The invention's effect】
According to the present invention, the second treatment tool insertion channel is disposed on a flexible tubular adapter that can be arbitrarily changed in the circumferential direction with respect to the insertion portion in which the first treatment instrument insertion channel is disposed, and is detachable. An arbitrary bent portion that can be remotely bent by pulling one operation wire from the hand side is provided near the distal end of the second treatment tool insertion channel, so that the first treatment tool protrudes. Arbitrarily adjusts the relationship between the position and direction of the second treatment tool outlet relative to the mouth, and sets the relationship between the position and direction of the two treatment tools to the optimum state for each case to always facilitate endoscopic treatment. In addition, by providing an urging means for constantly urging the operation wire in the pushing direction from the hand side, the arbitrary bending portion is bent unexpectedly due to a change in the bending state of the insertion portion. Phenomenon It does not, can be performed by setting an optimum state the position and direction of the relationship between the two treatment instrument insertion and endoscopic procedure into the body cavity easily and safely.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a hand operation unit of a tubular adapter according to a first embodiment of the present invention.
FIG. 2 is a side view showing an entire configuration of the two-channel endoscope according to the first embodiment of the present invention in a state where the tubular adapter is not attached to the insertion portion.
FIG. 3 is a side view showing the entire configuration of the two-channel endoscope according to the first embodiment of the present invention in a state where the tubular adapter is attached to the insertion portion;
FIG. 4 is a sectional view of the two-channel endoscope according to the first embodiment of the present invention, taken along line IV-IV in FIG. 2;
FIG. 5 is a front view of the distal end of the insertion section with the tubular adapter of the two-channel endoscope according to the first embodiment of the present invention attached to the insertion section.
FIG. 6 is a side sectional view of an arbitrary bent portion of the tubular adapter according to the first embodiment of the present invention.
FIG. 7 is a perspective view showing a use state of the two-channel endoscope according to the first embodiment of the present invention.
FIG. 8 is a side sectional view of a hand operation unit of the tubular adapter according to the second embodiment of the present invention.
FIG. 9 is a perspective view showing a use state of a conventional two-channel endoscope.
[Explanation of symbols]
1 insertion part flexible tube (insertion part)
2 curved part (insertion part)
3 Tip body (insertion section)
7 Bending operation knob 10 Cylindrical adapter 11 First treatment tool insertion channel 11a First treatment tool insertion port 11b First treatment tool insertion port 12 Second treatment tool insertion channel 12a Second treatment tool insertion port 12b 2 treatment tool insertion port 13 optional bending portion 14 operation wire 16 operation finger hook 19 compression coil spring (biasing means)
20 treatment tool insertion base 21 screw rod 22 manual stopper nut (stopper)

Claims (2)

A first treatment instrument insertion channel is inserted and arranged in the flexible insertion portion, and a first treatment instrument protrusion opening, which is an outlet opening of the first treatment instrument insertion channel, is arranged near the distal end of the insertion portion.
Arranging the second treatment instrument insertion channel on a detachable flexible tubular adapter that can be arbitrarily changed in the circumferential direction with respect to the insertion portion, and pulling one operation wire from the hand side. An arbitrary bent portion that can be remotely bent by providing a second treatment instrument insertion channel, which is an outlet opening of the second treatment instrument insertion channel, is provided near the distal end of the second treatment instrument insertion channel. In a two-channel endoscope arranged at the tip of an arbitrary bend,
A two-channel endoscope, further comprising a biasing means for constantly biasing the operation wire in the pushing direction from the hand side. 2. The two-channel endoscope according to claim 1, wherein a stopper capable of arbitrarily setting a movement limit position of the operation wire in the pushing direction is provided on the hand side.

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