JPS6241724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an intrabody cavity stone crushing device used for crushing stones formed within a body cavity.

[Background technology and its problems]

As shown in FIG. 1, this type of conventionally used crushing device has a short, hard tip 2 attached to the tip of a flexible tube 1, and a basket wire 3 is inserted from the tip 2. Furthermore, the basket wires 3 are connected to the operating wires 5 via joints 4. However, when the operation wire 5 is pulled toward the user's hand in an attempt to crush the stone 6 by grasping it within the basket wire 3, the basket wire 3 is held between the distal tip 2 and the stone 6, as shown in FIG. There were cases where the wires 3 were pinched and no force was transmitted to the basket wires 3, making it impossible to crush the calculus 6. In addition, the basket wire 3 was sometimes bent at the part where it was pinched.

[Purpose of the invention]

The present invention has been made focusing on the above circumstances,
The purpose of this is to create a body cavity in which a reliable crushing action can be achieved without the basket wire being caught between the calculus and the distal tip, making it impossible to crush the calculus, or the basket wire being bent. An object of the present invention is to provide an apparatus for crushing internal stones.

[Summary of the invention]

The present invention provides an escape groove in the distal tip for the basket wire to enter, so that when a calculus is grasped, the basket wire does not fit into the escape groove and become caught between the distal tip and the stone. This is how it was done.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

3 to 5 show the first embodiment. That is, 11 in FIG. 3 is a long flexible tube formed of a synthetic resin pipe or a tightly wound coil, and this flexible tube 11 has an outer diameter that allows it to be inserted easily into the insertion channel of the endoscope to be used. It is formed of. Further, a distal end tip 12 formed into a short tube shape from a hard and durable material such as metal is attached and fixed to the distal end of the flexible tube 11 so as not to come off. In addition, this tip tip 1
The distal end portion 2 is formed into a tapered shape with a slightly narrower end, and constitutes a tapered distal end portion 13 . In this tapered tip 13, relief grooves 16 are formed at predetermined intervals corresponding to the basket wires 15, into which basket wires 15, which will be described later, are respectively inserted.

The basket 14 is provided in the vicinity of the distal end of the flexible tube 11 having the distal tip 12, and can be protruded and retracted into the outside through the distal tip 12. That is, the basket 14 includes a plurality of basket wires 1 having elastic restoring force.
These basket wires 15...
The tips of the two are bound together by a connecting tip 17. In addition, the base ends of each basket wire 15 are bound by a joint 18 and are connected to an operating wire 19.
is connected to the tip of the Each basket wire 15 has a bent portion 20, and
It has an elastic restoring force so that it can open into a basket shape as shown in FIG. 3 in a free state where no external force is applied. In other words, the basket 14 is placed at the tip 1.
When pushed out from the tip 2, it opens like a basket, and can be pulled into the flexible tube 11 from the distal tip 12 and housed therein. Note that the distal end surface 21 of the distal tip 12 is formed flat, and the relief groove 16 is formed flat.
The area around the body cavity is smooth so as not to damage the inside of the body cavity.

Further, as shown in FIG. 3, the operating wire 19 is guided through the flexible tube 11 to the proximal end of the flexible tube 11, and is connected to an operating slider 23 provided on the operating section main body 22. . By moving the operation slider 23 back and forth, the operation wire 19 is moved forward and backward, and the basket 14 is operated to protrude and retract.

Next, a method of using the intrabody cavity stone crushing device having the above configuration will be explained.

First, as a preparation before use, operate the operation slider 23.
The basket 14 is drawn into the flexible tube 11 by moving the handle to the hand side and pulling the operating wire 19.

On the other hand, after inserting an endoscope into the body cavity, the flexible tube 11 of the crushing device is inserted into the channel of the endoscope, protrudes from the tip of the endoscope, and is inserted into the bile duct, for example, from the duodenal papilla. Then, operate the operation slider 23 to push the operation wire 19,
The basket 14 is pushed out from the tip 12.
As a result, each basket wire 15 swells into a basket shape and becomes ready to take in the calculus 24. Therefore, one of the basket wires 15...
The calculus 24 is taken in through the gap between the two, and the basket 14 is retracted by pulling the operating wire 19, and the calculus 24 is grasped. If the stone 24 is too large to be removed through the incision opening of the duodenal papilla, for example, the operation slider 23 is further pulled toward the user's hand, and the stone is firmly gripped with the basket wire 15 to crush it and remove the fragments. It is collected from the body cavity using the basket 14. When grasping and crushing the calculus 24 with the basket wires 15, the basket wires 15 are securely inserted into the relief grooves 16 formed in the distal tip 12 at a predetermined distance from each other. be done. Therefore, two or more basket wires 15 do not enter one escape groove 16 or get caught between the distal tip 12 and the calculus 24. Therefore, when the operating slider 23 is pulled, the basket wires 15 are reliably retracted. In rare cases, grasping and crushing the stone 24 is easily and reliably performed.

In addition, the area around the relief groove 16 is formed smoothly, and the tip 12 does not have any sharp parts.
When the basket wires 15 are made to protrude to grasp and crush the stone 24, the inside of the body cavity and the basket wires 15 are not damaged, and the inner surface of the channel is not damaged when the endoscope is inserted into the channel.

6 and 7 show a second embodiment of the invention, which includes two distal tips 12 at opposite locations.
Two escape grooves 16, 16 are provided in which two adjacent basket wires 15, 15 are fitted. Other aspects are the same as in the first embodiment.

FIG. 8 shows a third embodiment of the present invention, in which the front cross section of the inner hole 25 of the distal tip 12 is formed into a rectangular shape, and each corner thereof has four holes as in the first embodiment. Relief grooves 16 are formed. Since the relief grooves 16 are formed at each corner of the rectangular inner hole 25 in this way, each basket wire 15 is formed.
Easy to fit. That is, when the calculus 24 is strongly grasped, the basket wires 15...
Therefore, the force is reliably transmitted to the basket wire 15, and the stone can be crushed easily. Further, the basket wires 15 are not bent.

〔Effect of the invention〕

As explained above, the present invention provides an escape groove in the tip tip that corresponds to the basket wire and into which the basket wire enters at a predetermined interval, and the vicinity of the escape groove is formed smoothly to ensure that the basket wire is inserted into the escape groove. It was designed so that Therefore, the calculus can be reliably gripped and crushed without the basket wire entering a relief groove different from the predetermined relief groove or being caught between the distal tip and the calculus. In addition, since the area around the relief groove is formed smoothly, there is no damage to the body cavity or the basket wire when grasping and crushing a stone, and there is no damage to the inner surface of the channel when inserting the endoscope into the channel.

In this way, the present invention provides an intrabody cavity stone crushing device that can safely and reliably grasp and crush stones.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the vicinity of the tip of a conventional crushing device, FIG. 2 is an enlarged side sectional view of the same in use, FIG. 3 is a side sectional view showing the first embodiment of the present invention, and FIG. The figure is also a front view of the tip part, No. 5
6 is a front view of the tip portion of the second embodiment of the present invention, FIG. 7 is a side view of the tip portion of the second embodiment, and FIG. 8 is a side view of the tip portion of the second embodiment of the present invention. FIG. 3 is a front view of the tip portion of the embodiment. DESCRIPTION OF SYMBOLS 11...Flexible tube, 12...Distal tip, 14...Basket, 15...Basket wire, 16...Escape groove, 24...Calcium, 25...Inner hole.

Claims (1)

[Scope of Claims] 1. A flexible tube, a tubular distal tip attached to the distal end of the flexible tube, and a plurality of calculus grippers provided so as to be freely protrusive and retractable from within the flexible tube through the distal tip. In the apparatus for crushing stones in a body cavity, the distal end tip is provided with relief grooves into which the basket wires fit when the basket wires grasp a stone, and are spaced apart at a predetermined interval corresponding to each basket wire. A device for crushing stones in a body cavity, characterized in that the vicinity of the relief groove of the distal tip is formed smoothly. 2. Crushing a stone in a body cavity according to claim 1, characterized in that the front cross-sectional shape of the inner hole of the distal tip is formed into a square shape, and the relief groove is provided corresponding to the corner part. Device.