JP3068660B2 - Endoscope gripper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grasping tool for an endoscope which is used by being inserted into a treatment tool insertion channel of an endoscope for grasping and recovering foreign matter from a body cavity or the like.

[0002]

2. Description of the Related Art Conventionally, this type of endoscope gripping tool has been conventionally constructed such that a metal wire basket or the like is attached to the tip of an operation wire which is inserted into a synthetic resin tube made of fluororesin or the like so as to be able to advance and retreat. As described above, the gripping member that expands by its own elasticity is connected, and the gripping member is moved in and out of the distal end of the tube by moving the operation wire forward and backward in the tube.

[0003] That is, the endoscope gripping tool has been constituted by an operation wire, a gripping member, and a tube through which they are inserted.

[0004]

In recent years, the diameter of an endoscope has been reduced, and accordingly, the inside diameter of a treatment tool insertion channel (so-called forceps channel) inserted into an insertion portion of the endoscope has been reduced. ing. As a result, the outer diameter of the treatment tools used to be inserted into the treatment tool insertion channel must be reduced.

Therefore, the outer diameter of the gripping tool must be reduced. However, if the outer diameter of the gripping member at the distal end is reduced, the foreign matter gripping ability is significantly reduced due to insufficient expansion due to a decrease in elasticity. Is also weakened, and the durability is significantly reduced.

SUMMARY OF THE INVENTION The present invention solves such a conventional drawback, and enables an endoscope to be formed with a small outer diameter, and also has a sufficient foreign matter gripping capability and durability. The purpose is to provide tools.

[0007]

In order to achieve the above object, the endoscope gripping tool of the present invention has a gripping portion that expands laterally due to its own resilience and is connected to the tip of an operation wire. A through-hole through which the grasping forceps member which can be inserted into the treatment instrument insertion channel of the endoscope and the above-mentioned gripping portion in a state where the operation wire and the thinly contracted state are inserted is formed. It is characterized in that it comprises an insertion assisting member which is detachable at the entrance of the treatment instrument insertion channel so as to communicate with the channel.

[0008]

An embodiment will be described with reference to the drawings.

In FIG. 2, reference numeral 11 denotes a basket portion (grip portion) formed by, for example, four wires which spread laterally by its own elasticity. This basket part 1
1 is formed by binding the front and rear ends of four crimped wires of a predetermined shape as shown in FIG. 2 to binding tubes 12 and 13 by silver brazing or the like, respectively.

The binding tube 12 on the tip side is smoothly rounded at its head to form a tip, and the binding tube 13 on the rear side is connected and connected to the tip of the operation wire 15 to form a basket. 11 and an operation wire 15 (hereinafter referred to as “tip 12” and “connection tip”).
Connection tube 13 ") .

When an external force is applied inward (in the direction of arrow A) from the side, the basket portion 11 is narrowed and spreads,
The distal end tip 12, the connection tube 13, and the operation wire 15 can be inserted into a treatment tool insertion channel of an endoscope described later. Reference numeral 17 denotes a proximal tip fixed to the proximal end side of the operation wire 15.

In this manner, the grasping forceps member 10 for grasping and collecting foreign matter in the body cavity through the treatment instrument insertion channel of the endoscope is formed by connecting the basket portion 11 and the operation wire 15.

Reference numeral 20 denotes an insertion assisting member for inserting the grasping forceps member 10 into the treatment instrument insertion channel.

As shown in FIG.
Inside, a through hole 21 through which the operation wire 15 and the basket portion 11 can be inserted is formed, and the grasping forceps member 10 is inserted into the through hole 21 from the hand tip 17 side to the basket portion 11. be able to. However,
The outer diameter of the tip tip 12 is larger than the inner diameter of the through hole 21, and cannot be passed through the through hole 21.

Then, the insertion assisting member 20 is connected to the operation wire 1.
In the state shown in FIG. 2 in the portion 5, the basket portion 11 is expanded laterally by its own elasticity, and
In the state shown in FIGS. 3 and 4 in which 0 has been moved to the basket section 11, the basket section 11 is contracted to be thin and can be inserted into the treatment instrument insertion channel of the endoscope.

The insertion assisting member 20 is formed in the shape of a thin pipe almost from the distal end thereof, and the pipe-shaped portion 22 can be inserted into the entrance of the treatment instrument insertion channel of the endoscope. . However, the insertion assisting member 2
A flange-like portion 23 protrudes from the base end portion of the O, so that the portion cannot be inserted into the entrance of the treatment instrument insertion channel.

FIG. 1 shows a state in which the insertion assisting member 20 is inserted into the entrance portion of the treatment instrument insertion channel 51 of the endoscope 50, and the grasping forceps member 10 is inserted into the treatment instrument insertion channel 51.

A rubber forceps plug 55 having a slit 54 is removably attached to a luer lock base 53 which is communicated with the treatment instrument insertion channel 51 and protrudes from the entrance thereof. The pipe-like portion 22 of the insertion assisting member 20 passes through the inside of the luer lock base 53.
Can be detachably inserted from the tip.

Then, the flange-like portion 23 of the insertion assisting member 20 comes into contact with the mouth of the forceps plug 55, and the insertion assisting member 20 stably stops. Numeral 61 is a nut for fixing the luer lock base 53 to the operation section 60 of the endoscope. 62 is an O-ring for waterproofing. 65 is a suction pipe connected to the suction device.

The endoscope gripping tool of the present embodiment having the above-described structure is firstly configured as shown in FIG.
Insertion assisting member 20 attached so as to surround the distal end portion
Is inserted into the entrance of the treatment instrument insertion channel 51 of the endoscope (that is, the forceps stopper 55), and then the operation wire 15 is pushed into the treatment instrument insertion channel 51 from the outside as shown by the arrow B in FIG. Then, the grasping forceps member 10 is inserted toward the distal end of the insertion portion of the endoscope with the distal end tip 12 at the head.

Finally, as shown in FIG. 5, the basket portion 11 that has passed through the treatment instrument insertion channel 51 projects from the distal end 65 of the insertion portion of the endoscope 50. 6
Reference numeral 6 denotes an observation window, and 67 denotes an illumination window.

In this manner, in a state where the basket portion 11 is largely protruded from the distal end portion 65 of the insertion portion of the endoscope 50,
While observing through the observation window 2, foreign matter can be stored in the basket portion 11.

When the foreign matter is accommodated in the basket 11, the operation wire 15 is pulled in the direction of the hand, that is, in the direction opposite to the arrow B in FIG. As it is drawn into the treatment instrument insertion channel 51 from the above, it shrinks to a small size, and the foreign matter can be strongly gripped in the basket portion 11. Then, by removing the endoscope 50 from the patient in this state, the foreign matter can be taken out of the body.

When the foreign matter is not gripped in the basket portion 11, the operation wire 15 is pulled outward (in the direction opposite to the direction of arrow B) from the entrance side of the treatment instrument insertion channel 51 so that the gripping forceps member 10 is pulled. Can be pulled out from the treatment instrument insertion channel 51.

FIG. 6 shows a second embodiment of the present invention, in which an insertion assisting member 20 is formed longer from the flange-like portion 23 toward the proximal side, and a stopper against which the connecting pipe 13 collides at the base end thereof. 26 is formed. By doing so, the diameter of the distal end tip 12 is formed to be small to prevent the occurrence of inconvenience such that the distal end tip 12 damages the slit 54 of the forceps plug 55 when the distal end tip 12 is removed from the treatment instrument insertion channel 51. Can be.

The present invention is not limited to the so-called basket-type grasping forceps as described above.
The present invention can be applied to the present nail type and other various endoscope gripping tools.

[0027]

According to the endoscope grasping tool of the present invention, the grasping forceps member including the operation wire and the grasping portion is inserted into the treatment instrument insertion channel of the endoscope without intervening tubes. Therefore, it is possible to use the treatment tool insertion channel having a small inner diameter by inserting a grasping portion having a large diameter into the treatment instrument insertion channel, and it is possible to obtain excellent gripping and collecting ability and durability.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a use state of a first embodiment.

FIG. 2 is a side view showing the entire first embodiment.

FIG. 3 is a side view showing the whole of the first embodiment.

FIG. 4 is a partial sectional view of a distal end portion of the first embodiment.

FIG. 5 is a partial perspective view of the use state of the first embodiment.

FIG. 6 is a partial sectional view of a distal end portion of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Grasping forceps member 11 Basket part (gripping part) 15 Operation wire 20 Insertion assistance member 21 Through hole 50 Endoscope 51 Treatment tool insertion channel

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61B 17/22-17/39

Claims (1)

(57) [Claims] 1. A self of resilient freely interpolation de endoscopic treatment instrument insertion channel is connected to the distal end of the grip portion is operating wire extends laterally by a grasping forceps members, the treatment instrument inserted
The above, which is narrowed so that it can be easily inserted into the communication channel
The gripper and the operation wire can be inserted freely, and the treatment is performed.
To the forceps stopper located just before the entrance of the instrument insertion channel.
And an insertion assisting member having a pipe-shaped part that can be inserted and removed from the part.
Provided, the pipe-like portion of the insertion assisting member is inserted into the forceps stopper from outside.
By inserting, the tip of the pipe-shaped part is
After passing through the stopper,
A grasping tool for an endoscope, wherein the grasping tool is immediately in communication .