JP4694010B2 - Endoscopic basket-type collection tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope basket-type recovery tool that is used by being inserted into and removed from a treatment tool insertion channel of an endoscope.
[0002]
[Prior art]
In general, a basket-type recovery tool for an endoscope has a basket formed as a whole by a plurality of elastic wires, and is moved forward and backward by an operation wire inserted into a flexible sheath so as to be movable forward and backward in the axial direction. When the basket is pushed out from the distal end of the flexible sheath, the elastic sheath bulges due to the elasticity of the elastic wire itself, and is pulled into the flexible sheath to be elastically deformed and constricted. It has become.
[0003]
[Problems to be solved by the invention]
When a foreign object is captured by the basket-type recovery tool inserted into the treatment instrument insertion channel of the endoscope, it is common that the endoscope is pulled out of the body as it is.
[0004]
At that time, the basket in which foreign matter has been captured becomes dragged up by surrounding objects (for example, the cardia), and the resistance to traction increases, and the basket is pulled out when the basket slips forward from the distal end of the sheath. End up.
[0005]
Then, in the conventional basket-type collection tool for an endoscope as described above, the amount of swelling increases when the basket comes out of the distal end of the sheath, so that the foreign matter that has been captured is removed from the basket and falls.
[0006]
Therefore, when using a conventional basket-type collection tool for an endoscope, it is necessary to carefully pull the endoscope out of the body while maintaining the state where the operation wire of the basket-type collection tool is pulled on the hand side. It is not uncommon for the operator to use nerves and burden the operator, and at the same time, the trapped foreign object eventually falls off along the way.
[0007]
Accordingly, an object of the present invention is to provide an endoscopic basket-type recovery tool that can easily and reliably recover foreign matter captured in a basket without dropping in the middle.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the basket-type collection tool for an endoscope according to the present invention is such that a basket formed as a whole by a plurality of elastic wires is inserted and arranged in a conduction path so as to be movable forward and backward in the axial direction. In a basket-type collection tool for an endoscope connected to the tip of the operation wire, a rear basket portion that is inflated by its own elasticity outside the conduction path and is narrowed by being pulled into the conduction path as a basket, and a rear side A plurality of elastic wires forming the basket portion are formed to extend forward, and the rear basket portion is pulled into the conduction path to swell, and the rear basket portion is squeezed from the conduction path. A full front basket portion is provided.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a basket-type collection tool for an endoscope according to a first embodiment of the present invention. 1 is a tube made of, for example, a tetrafluoroethylene resin having an outer diameter of about 2 mm and a length of 1 to 2 m. A flexible sheath (conducting path) made up of, for example, is inserted into and removed from a treatment instrument insertion channel of an endoscope (not shown).
[0010]
An operation wire 2 is inserted into the flexible sheath 1 so as to be movable back and forth in the axial direction, and is advanced and retracted by an operation unit 20 connected to the base end of the flexible sheath 1.
The rear ends of the four elastic wires 10 are connected to the front ends of the operation wires 2 via the connecting pipe 4 by brazing or the like. The elastic wire 10 is formed of, for example, a stranded wire of a stainless steel wire, a single wire, or the like. The elastic wire 10 is bent and bent so as to swell evenly by changing its direction by 90 ° as shown in FIG. Are united together.
[0011]
As shown in FIG. 1, a rear basket portion 12 having a cage shape in a natural state is formed by four elastic wires 10. The rear basket portion 12 is swelled in a basket shape by its own elasticity outside the flexible sheath 1, and is elastically deformed by being drawn into the flexible sheath 1, and gradually becomes narrowed. Yes.
[0012]
Further, the front basket portion 11 formed by extending the four elastic wires 10 forming the rear basket portion 12 to the front is in a substantially completely constricted state in the natural state. The basket portion 12 is driven in the opening direction by the operation of being drawn into the flexible sheath 1 and constricted, and swells as shown in FIG.
[0013]
Then, when the rear basket portion 12 is pushed out of the flexible sheath 1, the front basket portion 11 is driven by the operation and is narrowed as shown in FIG. When pulled in, the rear basket portion 12 is elastically deformed and narrowed.
[0014]
Therefore, when using this basket-type collection tool for an endoscope, the endoscope is passed through the treatment instrument insertion channel of the endoscope while being retracted into the flexible sheath 1 up to the front basket portion 11, and when used, FIG. As shown in FIG. 2, only the front basket portion 11 is pushed out from the distal end of the flexible sheath 1 to be inflated, and the polyp 100 and the like are captured in the front basket portion 11.
[0015]
By doing so, when the entire endoscope is pulled out of the body next time, as shown in FIG. 4, when the front basket portion 11 is pulled out of the distal end of the flexible sheath 1, Since the basket portion 12 is also pulled out from the distal end of the flexible sheath 1, the front basket portion 11 is narrowed by the operation, and the polyp 100 can be reliably recovered outside the body without dropping on the way. In this case, since the front basket portion 11 is always in the tightening direction, the polyp is not dropped even if the operation side hand is released.
[0016]
Further, in the endoscope basket-type recovery tool of this embodiment, the rear basket portion 12 also has the same foreign substance capturing ability as that of a general endoscope basket-type recovery tool, so that the polyp 100 is dropped during recovery. In a case where there is little concern, the polyp 100 can be captured and recovered by the rear basket portion 12 as shown in FIG.
[0017]
In the embodiment above mentioned, as shown in FIG. 1, that the front basket portion 11 is formed so that a very small cage-like in nature.
[0018]
Further, the flexible sheath 1 may be omitted, and the operation wire may be directly passed through the treatment instrument insertion channel of the endoscope, and the number of elastic wires 10 may be three or five or more. .
[0019]
【The invention's effect】
According to the present invention, as a basket, a rear basket portion that is swollen by its own elasticity outside the conduction path and is narrowed by being drawn into the conduction path, and a plurality of elastic wires forming the rear basket section are respectively forward. The front basket is formed by extending the rear basket portion so that the rear basket portion is pulled into the conduction path and swells when the rear basket portion is squeezed, and the rear basket portion is squeezed when the rear basket portion is pushed out of the conduction path. When capturing and pulling out foreign matter such as polyps inside, if the front basket part is pulled out from the leading end of the conduction path, the front basket is constricted by the action of the rear basket part being pulled out from the conduction path. The foreign matter captured in the basket can be easily and reliably collected without dropping.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view showing a state in which a rear basket portion of an endoscope basket-type recovery tool according to a first embodiment of the present invention protrudes from a distal end of a flexible sheath.
FIG. 2 is a front view of an endoscope basket type recovery tool according to a first embodiment of the present invention.
FIG. 3 is a side sectional view showing a state in which the rear basket portion of the endoscope basket-type recovery tool according to the first embodiment of the present invention is drawn into the distal end of the flexible sheath.
FIG. 4 is a side cross-sectional view showing a state in which foreign matter is captured and recovered in the front basket portion of the endoscope basket type recovery tool according to the first embodiment of the present invention.
FIG. 5 is a side cross-sectional view showing a state where foreign matter is captured in the rear basket portion of the endoscope basket-type recovery tool of the first embodiment of the present invention.
[Explanation of symbols]
1 Flexible sheath (conduction path)
2 Operation wire 10 Elastic wire 11 Front basket portion 12 Rear basket portion

Claims (1)

Basket formed in cage-like as a whole by a plurality of resilient wires, The endoscopic basket type recovery tool which is connected to the distal end of the operation wire which is inserted disposed movably conductive path in the axial direction,
As the above basket,
Outside the conduction path, a rear basket portion that swells by its own elasticity and narrows by being drawn into the conduction path;
Each of the plurality of elastic wires forming the rear basket portion is formed by extending forward, and the rear basket portion is swelled by being pulled into the conduction path to be squeezed, and the rear basket portion is guided. In what is provided with a front basket portion that is narrowed by the action of being pushed out of the passage ,
When the basket is completely out of the conduction path, the front basket portion is formed so as to swell in a small basket shape, and in the state where the front basket portion is swelled most, A basket-type collection tool for an endoscope, wherein each of the plurality of elastic wires is bent convexly outward .

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