JPH10118087A - Tool for recovering foreign substance for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool for recovering foreign substance for an endoscope which is easily prepd. and is easily expandable when it is used and can be used by inserting it into a narrow insertion channel for a narrow processing tool by forming the outer diameter of a mantle tube narrow. SOLUTION: A mantle tube 11 with flexibility at least in the neighborhood of the apex side and with a plurality of cut breaks 15 in parallel in the axial direction on the side wall part in the neighborhood of the apex, an operational wire 13 being freely forward/backward inserted in the above described mantle tube 11 in the axial direction and being operated forward and backward from this side and an operating part 20 for operating forward and backward the above described operational wire 13, are provided and belt-like parts 16 between the cut break 15 and the cut break 15 at the apex of the above described mantle tube 11 are expanded outward by drawing the above described operational wire 13 at the operating part 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope for collecting foreign matter from a body cavity or the like via an endoscope.

[0002]

2. Description of the Related Art A conventional endoscope foreign matter collecting tool is, for example, a basket formed by bending a plurality of flexible wires into a cage as shown in Japanese Utility Model Publication No. 62-14811.
It expands and contracts by being taken in and out from the tip of the mantle tube.

[0003]

However, it is difficult to form a plurality of wires in a cage shape, and it takes a long time to prepare special jigs and tools and to increase the cost.

Further, since a basket formed by expanding a flexible wire in a cage shape has a low expanding force, it does not spread easily in a thin lumen in a body cavity or the like, and is in contact with a highly viscous liquid such as bile. In some cases, they stick together and are difficult to spread.

Further, since the rear ends of the plurality of flexible wires forming the basket are bound together, the outer diameter of the mantle tube becomes larger due to the thicker portion, so that a thin treatment instrument can be inserted. Cannot be used by passing through the channel.

Accordingly, the present invention is directed to an endoscope which is easy to manufacture, easy to spread at the time of use, and can be formed by making the outer diameter of a mantle tube small and can be used by being inserted into a thin treatment instrument insertion channel. It is an object to provide a foreign matter collection tool.

[0007]

In order to achieve the above object, an endoscope foreign matter recovery tool according to the present invention has flexibility at least in the vicinity of the front end thereof, and has an axial direction on a side wall portion near the front end. A mantle tube having a plurality of cuts formed in parallel to the mantle tube, an operation wire that is inserted into the mantle tube so as to be able to advance and retreat in the axial direction and is operated to advance and retreat from the hand side, and an operation unit that operates the operation wire to advance and retreat. And the band portion between the cuts at the distal end of the mantle tube is bulged outward by pulling the operation wire at the operation portion.

A stopper for stopping the operation wire at a plurality of positions having different pulling amounts may be provided in the operation section. Further, a suction connection portion for suctioning from a cut portion at the distal end of the mantle tube through the lumen of the mantle tube may be provided on a proximal end side of the mantle tube, in which case, the suction connection portion may be provided. May be provided in the operation unit.

Further, there is provided stiffening means for preventing the distal end portion of the operation wire from being bent so that the flexible portion of the operation wire does not exist in front of the longitudinal center of the band portion. May be.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an endoscope foreign object recovery tool according to a first embodiment of the present invention, and a flexible mantle tube 1 inserted into and removed from a treatment tool insertion channel of an endoscope (not shown).
1 is made of nylon, HDPE (polyethylene), polyurethane resin, ethylene tetrafluoride resin or the like. The mantle tube 11 only needs to have flexibility at least near the distal end.

A plurality of cuts 15 are formed in the side wall portion near the distal end of the mantle tube 11 in parallel with the axial direction. The cuts 15 are formed at four locations at 90 ° intervals. However, the present invention is not necessarily limited thereto,
The cut 15 may be formed at 3 to 8 places, or may be more than that.

The distal end portion of the mantle tube 11 is cut by a cut 15 so that each cut 15 and the cut 15 are separated.
Is formed in the belt-like portion 16, and when that portion is compressed in the axial direction, each belt-like portion 16 bulges outward as shown in FIG.

However, in a natural state in which no force is applied to the mantle tube 11 in the compression direction, as shown in FIG. 2 and FIG. 3, which is an enlarged front sectional view taken along the line III-III, the band portion 16 does not bulge. FIG. 3 shows a state in which the cut 15 is rotated by 45 ° so as not to be confused with the hatching line.

An operation wire 13 is inserted through the entire length of the mantle tube 11. Mantle tube 11 and operation wire 13
The diameter of the operation wire 13 is set such that a gap is formed with respect to the inner diameter of the mantle tube 11 so that the gap between the operation wire 13 and the inner tube can be used as a suction passage.

The distal end of the operation wire 13 is fixed to a distal end tip 14 fixed to the distal end of the outer tube 11 by soldering or the like, and by pulling the operation wire 13 toward the outer end of the outer tube 11 by pulling. The band 16 swells.

The base end of the mantle tube 11 is connected to the outer cylinder 21 of the operation unit 20.
Connected and fixed. The outer cylinder 21 is in the shape of an injection cylinder, and has a piston-shaped operation shaft 2 to which the base end of the operation wire 13 is fixed.
2 is inserted so as to be able to advance and retreat in the axial direction. An O-ring 23 for sealing is attached to the fitting portion.

A ring-shaped first finger hook 24 for locking the thumb of the operator's hand is formed at the base end of the operation shaft 22 protruding from the outer cylinder 21. Is formed with a second finger hook 25 in which two flanges are protruded at an interval to lock the index finger and the middle finger.

An L-shaped groove 27 is formed on the outer peripheral surface of the operating shaft 22 as shown in the outline view also shown in FIG. The tip of the pin 28 is engaged with the groove 27.

Therefore, the pin 28 is connected to the lateral groove 2 of the groove 27.
7a, the operating shaft 22 cannot be moved in the axial direction. At this time, since the wire 13 is pushed out to the front side, the strip 16 is in a state of being straightened.

As shown in FIG. 1, the pin 28 is
The operating shaft 22 is movable in the axial direction by engaging with the linear portion 27b, so that the operating wire 13 can be pulled and the belt-shaped portion 16 can bulge outward.

In the middle of the bottom surface of the linear portion 27b, small projections 29 (stoppers) are protruded at three places, and at each of the portions, the pin 28 is hooked so that the operation shaft 22 can be stopped. ing.

However, if the operating shaft 22 is slightly pushed in the axial direction and pushed and pulled while the pin 28 is hooked on the projection 29, the pin 28 gets over the projection 29 and
Moves.

Accordingly, the pin 28 and the projection 29 act as a so-called click on the movement of the operation shaft 22, and by changing the rest position of the operation shaft 22 with respect to the outer cylinder 21, the size of the bulging amount of the belt 16 is changed. Can be arbitrarily selected in three stages.

A portion of the operation shaft 22 protruding from the outer cylinder 21 is formed with a suction connection base 31 connected to an external suction device (not shown). The suction passage 32 provided is the suction connection base 31.
Is in communication with

Therefore, by connecting a suction tube to the suction connection base 31, suction is performed through the suction passage 32, the inner cavity of the outer cylinder 21 and the inner cavity of the outer tube 11, and from the cut 15 at the tip of the outer tube 11. It can be carried out.

In use, the thus constructed endoscope foreign matter collecting tool is passed through the mantle tube 11 through the treatment tool insertion channel of the endoscope (not shown).
Is pulled to the maximum extent so that the belt-like portion 16 bulges greatly.

Then, as shown in FIG. 4 and FIG. 5 which is a cross-sectional view taken along line V-V of FIG. Operation wire 1 so as to reduce the swelling of
Push 3 into the front.

Then, the width of the cut 15 is reduced, and as shown in FIG.
The foreign object 100 is sandwiched between and the operation wire 13 and is held.

Since the belt-like portion 16 has an arc-shaped cross section, the foreign matter 100 can be firmly pressed inward over a wide area and firmly captured. After the foreign object 100 is grasped at the distal end of the mantle tube 11 in this manner, the foreign object 10 is pulled out of the body cavity together with the endoscope.
0 can be recovered.

When the suction tube is connected to the suction connection base 31 so that suction is performed from the cut 15 when the foreign material 100 is gripped, the foreign material 100 captured in the cut 15 can be attracted by the suction force. As shown in FIG. 6, a plurality of foreign substances 100
Can be continuously captured.

When the operating wire 13 has flexibility up to the foremost portion, as shown in FIG. 7, when the operating wire 13 is pulled, the distal end portion of the mantle tube 11 moves in one direction. It may bend and shake your head.

Therefore, as shown in FIG. 8 and FIG. 9, for example, the operation wire 1 is arranged such that the flexible portion of the operation wire 13 does not exist before the longitudinal center of the strip 16.
3 may be covered with a pipe 34 or may be subjected to a hardening treatment 35 with solder or the like. By doing so, it is possible to prevent the tip of the outer tube 11 from swinging.

[0033]

According to the present invention, by pulling the operating wire in the operating portion, the band-shaped portion between the cuts at the tip of the mantle tube bulges outward, so that the operating wire is pulled. By doing so, the belt-shaped portion can be reliably bulged, whereby the foreign matter can be reliably grasped and collected in the opened cut portion.

In addition, since such a grip portion only needs to form a cut in the flexible mantle tube, it is easy to manufacture, and it is not necessary to bundle a plurality of wires, so that the outer shape can be made thin. Since it can be used, it can also be used for a treatment tool insertion channel of a thin endoscope.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view showing a state in which a band-shaped portion of an endoscope foreign matter recovery tool according to an embodiment of the present invention is swollen.

FIG. 2 is a side view of a distal end portion of the endoscope foreign matter recovery tool according to the embodiment of the present invention in a state where a band-shaped portion is not bulged.

FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a side view of a distal end portion of the endoscope foreign matter collection tool according to the embodiment of the present invention in a state where foreign matter is gripped.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 shows an endoscope foreign matter recovery tool according to an embodiment of the present invention.
It is a side view of the tip part in the state where a suction operation was performed and a plurality of foreign substances were grasped simultaneously.

FIG. 7 is a side cross-sectional view of the distal end portion of the endoscope foreign matter recovery tool in a state where the distal end portion of the mantle tube has swung its head.

FIG. 8 is a side sectional view of a distal end portion of an endoscope foreign matter recovery tool according to a second embodiment of the present invention.

FIG. 9 is a side cross-sectional view of a distal end portion of an endoscope foreign matter recovery tool according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Mantle tube 13 Operation wire 15 Cut 16 Band-shaped part 20 Operation part 31 Suction connection base

Claims (5)

[Claims] 1. An outer tube having flexibility at least in the vicinity of the front end and having a plurality of cuts formed in a side wall portion near the distal end in parallel with the axial direction, and capable of moving in the axial direction within the outer tube. An operation wire that is inserted and moved forward and backward from the hand side,
An operating portion for operating the operating wire forward and backward, wherein the operation portion pulls the operating wire so that the band-shaped portion between the cuts at the distal end of the mantle tube bulges outward. A foreign matter recovery tool for an endoscope, comprising: 2. The endoscope foreign matter recovery tool according to claim 1, wherein a stopper for stopping the operation wire at a plurality of positions having different amounts of pulling is provided on the operation section. 3. The sheath tube according to claim 1, wherein a suction connection portion for suctioning from a cut portion at a distal end of the sheath tube through a lumen of the sheath tube is provided at a proximal end side of the sheath tube. Foreign matter collection tool for endoscope. 4. The endoscope foreign matter recovery tool according to claim 3, wherein the suction connection part is provided on the operation part. 5. A stiffening means for preventing the distal end portion of the operation wire from being bent so that the flexible portion of the operation wire does not exist in front of the longitudinal center of the band-shaped portion. The foreign matter recovery tool for an endoscope according to claim 1, 2, 3, or 4.