JPS5829456A - Recovery instrument of foreign matter in body cavity - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intrabody cavity foreign body recovery tool for removing foreign bodies such as gallstones from a body cavity using a basket for holding the foreign body, which is made of a plurality of elastic wires.

To remove a foreign object, such as a gallstone, from a body cavity endoscopically, the gallstone is generally removed from the gallbladder using the bile duct, and the gallstone is transported to the duodenum via the papilla. Actions are taken. When gallstones are larger than the narrowed part of the papilla and are difficult to remove, a procedure is adopted in which the gallstones are temporarily placed in the narrowed part and removed out of the body cavity using a separate extraction means.

The retrieval tool used to remove troublesome foreign bodies such as gallstones has a basket made of multiple elastic wires at the tip of a flexible tube that can be inserted into the channel of the endoscope. A memorial service is adopted to prepare for the unexpected. As this type of retrieval tool, baskets made of elastic wires of various stiffnesses have been used since the functionality of the basket is important.

It is easy to grasp the gallstone by opening it securely in the bile duct due to its strong elastic force and taking the gallstone into the basket. However, it is extremely difficult to remove the gallstones, that is, to leave them in the stricture as described above.

In addition, the strange scale made of soft elastic wire has a weak elastic force, making it difficult to remove gallstones from within the core.
If the basket is pressed against the bile duct wall, the gallstones can be easily removed by deforming the basket, but on the other hand, it is difficult to remove the gallstones from the affected area.

For this reason, the retrieval tools used for extracting foreign bodies, such as gallstones, which are required to be taken in and removed at any time, have poor operability.

Therefore, recently, a retrieval tool has been developed in which a part of the elastic wire that makes up the basket for grasping foreign objects is made independent and can be moved forward and backward from the hand side, but a separate operation system is added. Please note that this is just an example of how it works, and it has no effect on improving operability.

This invention has been made in view of the above-mentioned circumstances, and its object is to configure a part of the plurality of elastic wires constituting the basket for grasping a foreign object with elastic wires having weak elastic force, It is an object of the present invention to provide a device for recovering a foreign body in a body cavity.

Hereinafter, the invention will be explained based on the first implementation side pressure shown in the drawings. In FIG. 1, reference numeral 1 denotes a flexible tube of a recovery tool 2, and a base 3 is attached to the proximal end of the flexible tube 1. Manako's flexible tube l has an outer diameter that allows it to be inserted into a channel of an endoscope (not shown), and its distal end can be guided into the body cavity through the endoscopic obtuse. An operating wire 4 is inserted into the flexible tube 1 and extends toward the proximal side. Further, a passkeator for grasping a foreign object is provided at the distal end portion 6 of the flexible tube 1 so as to be freely protrusive and retractable.

t+, the structure of this basket 6 is centered around a plurality of elastic wires, for example, four elastic wires, each of which has its center portion elastically displaced outward, and these elastic wires...
Connect the tips of the elastic wires 7 and 7 together with the front end of the operating wire 4 with the rear end of the elastic wire 7 with the rear end of the elastic wire 7 with the rear end of the elastic wire 7
, and each elastic wire 7.
An expandable foreign matter storage section 1o is configured in a space surrounded by....

The present invention is applied to this No. 4 scheme (1). That is, the elastic wire 7 that constitutes the passkeato...
One of the elastic wires 7 is composed of a so-called soft elastic wire 7a with a weak elastic force, and the other elastic wires 7 are composed of a so-called hard elastic wire 7 with a strong elastic force.
The basketball and toro are constructed from two types of wires with different elastic forces.In addition, 11 is the operation tube 12 that fits the proximal side of the operation wire 40, and the operation tube 12. The operation tube 12 is connected to the flexible tube 1 at the hand III.
This is a basket advancing/retracting operation part that protrudes from the end S.

When removing a foreign object from a body cavity, such as a gallstone in a bile duct, using the collection tool 2 configured as described above, first pull the basket advancement/retraction operation section 11 to release each of the elastic wires y a , y of the passkeatro. b-- is drawn into the distal end portion 5 of the flexible tube 1, and in this state, the flexible tube 1 is inserted, for example, into a channel of an endoscope that has been previously inserted into the body cavity. After this, when a foreign object is found in the bile duct and the foreign object is caught, K presses the basket advancement/retraction operation section 11 to make each of the elastic wires 7*, 7b, etc. of the passkeatro protrude from the distal end 5. Therefore, the vertical elastic wire 7b has strong elasticity in the opening direction.
... causes the bile duct to expand and swell, making it possible for foreign substances to accumulate. As a result, foreign matter is taken into the tube through the gaps between the elastic wires 7b.

Then, when the loading of the middle slot 6 is completed, each elastic wire ya,
By drawing the yb... into the distal end 5, the foreign object is securely retained as the passkeatro shrinks, and when the endoscope is taken out, it is extracted from the duodenum to the outside of the body cavity via the papilla. No.

In addition, when retaining a foreign object, if a large foreign object is retained in a narrowed area such as the papilla and is difficult to remove, use a separate extraction means near the narrowed area where it is easier to remove the foreign object. However, in this case, by pressing the soft elastic wire 7m at the distal end 5@ against the inner wall of the bile duct by various operations of the endoscope (angle operation, etc.), the soft elastic wire is removed due to its weak elasticity. 7m is displaced from the foreign object, and the foreign object is easily ejected from inside the basket 6 by the strong elasticity of the elastic wire yb.

Therefore, it is possible to improve the operability of the pass scale recovery tool 2 by using the elastic wire 7a with weak elasticity and the elastic wire 7b with strong elasticity in combination.

However, the present invention is not limited to the embodiment described above, and may be implemented, for example, as in the second embodiment shown in FIG.

That is, in the second embodiment, the two elastic wires 2.7, which were located at positions symmetrical to the center point of the elastic wires constituting the lines Pa, Suke, and Toro, were made of a so-called soft wire with a weak elastic force. Elastic wire 7 m.

i&, and the others are made up of so-called stranded elastic wires 7b, 7b, which have strong elasticity.

Even in this case, the same effects as in the first embodiment described above can be achieved.

In FIG. 2, the same components as those in the first embodiment are given the same numbers and their explanations are omitted.

Further, in each of the embodiments described above, the present invention is applied to a basket made of four elastic wires, but it is of course applicable to a basket made of other plurality of elastic wires.

As explained above, according to the present invention, some of the elastic wires of the plurality of elastic wires constituting the no-no-suke for grasping a foreign object are made of elastic wires with weak elastic force, and the others are made of elastic wires with weak elastic force. Since it is constructed with a strong elastic wire, when grasping a foreign object, the basket located in the affected lumen is sufficiently expanded using the strong elastic wire to easily remove the foreign object.

Furthermore, when removing a foreign object, the foreign object can be easily removed by shifting the elastic wire, which has a weak elasticity, from the foreign object.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a retrieval tool according to a first embodiment of the present invention, and FIG. 2 is a sectional view showing a retrieval tool according to a second embodiment. 1--flexible tube, 6--pasque, ), 7m--elastic wire with weak elastic force, 7b--elastic wire with strong elastic force.

Claims (1)

[Claims] A body cavity foreign body retrieval device comprising a foreign body grasping basket made of a plurality of elastic wires retractably provided at the distal end of a flexible tube, wherein the foreign body grasping basket includes a plurality of foreign body grasping baskets. Collection A of foreign matter in a body cavity, characterized in that some of the elastic wires are made of elastic wires with weak elastic force, and the others are made of elastic wires with strong elastic force.