JPH09534A - Basket-type grasping tool for endoscope - Google Patents

Abstract

(57) [Abstract] [Purpose] An object is to provide a basket-type grasping tool for an endoscope, which can easily release foreign substances captured in a basket. [Structure] An operating section 4 connected to the proximal end of a sheath 2 is provided with an advancing / retreating operation means 45 for remotely advancing / retreating the basket 1 in the axial direction of the sheath 2, and a remote operation of the basket 1 about the axial line of the sheath 2. Rotation means 4 for manually rotating
7 was provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscopic basket-type grasping tool for recovering foreign matter in a body cavity and the like through an endoscope.

[0002]

2. Description of the Related Art In general, basket type grasping tools for endoscopes are
A basket formed by inflating a plurality of elastic wires, which are bound together at both ends, in a cage shape is configured so that it can be put in and taken out from the distal end of the sheath, and the basket is sheathed at an operating portion connected to the proximal end of the sheath. An operation knob or the like is provided for remotely moving back and forth in the axial direction.

[0003]

In the body cavity, after the foreign matter is captured in the basket of the basket-type grasping tool,
When trying to pull it out, it may not be possible to pass through a narrowed portion or the like in the body cavity.

In such a case, the foreign matter captured in the basket must be released, but it is extremely difficult for the conventional basket type grasping tool for an endoscope to release the foreign matter once captured. I was taking measures to forcibly destroy the basket.

Therefore, not only can the basket-type grasping tool for endoscopes no longer be used, but it is not a simple task to destroy the basket at the tip by remote control, so that a large physical burden is placed on the patient. Was not a little.

Therefore, an object of the present invention is to provide a basket-type grasping tool for an endoscope, which can easily release foreign substances captured in a basket.

[0007]

In order to achieve the above object, the basket type grasping tool for an endoscope according to the present invention is a basket formed by inflating a plurality of elastic wires bound together at both ends in a cage shape. In a basket-type grasping tool for endoscopes that can be taken in and out from the distal end of the sheath, for remotely advancing and retracting the basket in the axial direction of the sheath by an operating portion connected to the proximal end of the sheath. And a rotation operation means for remotely rotating the basket around the axis of the sheath.

[0008]

Embodiments will be described with reference to the drawings. FIG. 1 shows a basket-type grasping tool for an endoscope, in which a basket 1 formed by inflating four elastic wires 11 to 14 bound to each other at both ends in a cage shape is a sheath made of a flexible tube. It is arranged so that it can be freely taken in and out from the tip of 2. Reference numeral 15 is a tip that binds and fixes the tip portion of the basket 1.

The sheath 2 is made of, for example, a fluororesin tube, and is inserted into the treatment instrument insertion channel of the endoscope so as to be able to move back and forth. An operation wire 3 is inserted in the sheath 2 so as to be able to move forward and backward over the entire length, and the base end side of the basket 1 is connected to the tip of the operation wire 3.

An operating portion 4 is detachably connected to the proximal end portion of the sheath 2. Reference numeral 21 denotes a connection mouthpiece that is attached to the base end of the sheath 2 to connect the sheath 2 to the operating portion 4. The fixing metal fittings 22 and 23 fixed to the base end of the sheath 2 are sandwiched between them. It is attached by screwing onto the outer peripheral surface.

As shown in FIG. 2, four slits 42 opening to the front side are formed at the tip of the operating portion main body 41 to which the connecting mouthpiece 21 on the sheath 2 side is connected. It can be pushed apart when the base 21 is disengaged.

Then, by engaging the connecting mouthpiece 21 therewith and then attaching the pressing ring 43 to the outside of the slit 42, the collar portion 24 formed at the end portion of the connecting mouthpiece 21 is removed from the operation portion main body 41. It will not come off. However, the rotation between the connection mouthpiece 21 and the operation portion main body 41 is not blocked,
Both can relatively rotate around the operation wire 3 in the axial position.

A slider 45, to which the proximal end of the operation wire 3 is fixed, is engaged with a groove formed in the central portion of the operation portion main body 41 so as to be able to move back and forth. The outer surface of the slider 45 is formed with a recess for engaging the second and third fingers of the operator.

Reference numeral 46 is a wire fixing pin for fixing the operation wire 3 to the slider 45, and the base end portion of the operation wire 3 is completely fixed to the slider 45. Therefore, the operation wire 3 cannot move or rotate with respect to the slider 45.

A finger hook 47 for engaging the first finger of the operator is attached to the rear end portion of the operation portion main body 41. The finger rest 47 is rotatable about the shaft 48 on both sides by about 90 °. However, in order to maintain the straight state as shown in FIG.
A click 49 is provided that resiliently engages the side.

As shown in FIG. 3, the basket-type grasping tool for an endoscope thus formed has the slider 4 by engaging the finger rest 47 and the slider 45 with the fingers of one hand of the operator.
The basket 1 can be put into and taken out of the distal end portion of the sheath 2 through the operation wire 3 by operating the wire 5 forward and backward as indicated by arrow A.

When the basket 1 is drawn into the sheath 2, the basket 2 is pressed from the outside by the sheath 2 so that the bulge is forcibly contracted and pushed out of the sheath 2.
The elastic wires 11 to 14 swell like a cage.

Therefore, after being inserted into the treatment instrument insertion channel of the endoscope in the contracted state shown in FIG. 3, in the expanded state shown in FIG.
Can be captured within.

Further, in the basket type grasping tool for an endoscope of this embodiment, as shown in FIG. 4, a finger hook 47 is bent at a right angle around a shaft 48, and the proximal end portion of the sheath 2 is held by one hand. By grasping the vicinity of the coupling base 21 and rotating the finger hook 47 with the other hand, as shown by the arrow B, the entire operation unit 4 can be rotated.

When the operation section 4 is rotated in this way,
The operation wire 3 whose base end is fixed to the slider 45 rotates about the axis, and the basket 1 at the tip rotates about the tube axis of the sheath 2.

Therefore, when the basket 1 is rotated by remote control from the operating portion 4 side after the foreign substance 100 is captured in the basket 1 inside the body cavity, as shown in FIGS. Elastic wire 11 in contact
Does not rotate, the other elastic wires 12 to 14 rotate,
Since the gap between the elastic wires 11 and 14 partially expands,
As shown in FIG. 7, the foreign matter 100 falls out of the basket 1 through the gap.

[0022]

According to the present invention, the basket at the tip can be rotated around the axis of the sheath by operating the rotation operation means provided in the operation portion, so that the foreign matter once trapped in the basket can be removed. , It can be opened easily from the hand side.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment.

FIG. 2 is a front sectional view taken along line II-II of the embodiment.

FIG. 3 is a side cross-sectional view of the working example of the embodiment.

FIG. 4 is a side cross-sectional view of a usage state of the embodiment.

FIG. 5 is a front sectional view showing an operation of releasing a foreign substance according to the embodiment.

FIG. 6 is a front sectional view showing an operation of releasing a foreign matter according to the embodiment.

FIG. 7 is a front cross-sectional view showing a foreign matter releasing operation of the embodiment.

[Explanation of symbols]

 1 basket 2 sheath 3 operation wire 4 operation part 11-14 elastic wire 45 slider 47 finger hook 100 foreign material

Claims (1)

[Claims] 1. A basket formed by inflating a plurality of elastic wires, which are bound together at both ends, in a cage shape,
In a basket-type grasping tool for an endoscope that can be taken in and out from a distal end of a sheath, an operation part connected to a proximal end of the sheath is operated to advance and retract the basket in the axial direction of the sheath remotely. A basket-type grasping tool for an endoscope, comprising: operating means and rotating operation means for remotely rotating the basket around the axis of the sheath.