JPH0154059B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscopic forceps that can collect tissue within a body cavity, for example, using forceps pieces that open and close.

Conventionally, in this type of endoscopic forceps, a pair of forceps pieces that open and close are formed into a cup shape, and the tips of the peripheral edges of the forceps pieces are both sharply polished or both are left flat. It was one of two things. When both of the peripheral tips of each forceps piece remained flat, the tissue cutting force was clearly small, making it difficult to collect the tissue. In addition, if both of the tools were sharply ground, the tip of the peripheral edge would quickly become dull after a few uses, and the mesh would become misaligned, resulting in a sharp drop in sharpness, making it difficult to collect tissue.

The present invention has been made focusing on the above circumstances,
The purpose is to provide endoscopic forceps that have improved tissue cutting ability and increased durability of the cutting ability.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows the entire endoscope forceps 1.
Reference numeral 2 in the figure is an insertion portion of the endoscopic forceps 1.
The insertion portion 2 is formed of a tightly wound coil 3, and constitutes a flexible tubular body that can be elastically bent. In addition, a forceps body 4 is provided at the tip of the insertion portion 2.
is installed and fixed. A pair of cup-shaped forceps pieces 5 and 6 are pivotally attached to the forceps main body 4 so as to be openable and closable. That is, each forceps piece 5, 6
Arms 7 and 8 are formed extending from the proximal end sides of the forceps body 4, respectively, and these arms 7 and 8 are pivotally connected to the forceps body 4 via a shaft 9. Further, the base ends of the arms 7 and 8 are respectively connected to an operation wire (not shown) via a link (not shown), and by pushing and pulling this operation wire, the forceps pieces 5, 6 can be opened and closed. There is.

The operating wire is inserted into the insertion section 2 and is pushed and pulled by an operation section 11 provided at the proximal end of the insertion section 2. In other words, the operating section 11 includes an operating body 13 attached to the operating section main body 12, which is movable in the front and back direction.
An operating wire is connected to the operating body 13. Thus, by moving the operating body 13 back and forth, the operating wire can be pushed and pulled.

On the other hand, as shown in FIG. 2, the peripheral edges of the forceps pieces 5 and 6 that touch each other when they engage with each other have their inner surfaces polished to form a sharp blade part 14, and the other side has a flat receiving blade 15. . The cutting edge of the blade portion 14 and the flat surface of the receiving blade 15 are designed to mesh with each other.

Next, the operation when using the endoscopic forceps 1 will be explained.

First, the insertion portion 2 of the endoscopic forceps 1 is introduced into the body cavity using the forceps channel of the endoscope that has been inserted into the body cavity in advance. Then, when the operating body 13 is advanced forward in the operating section 11 before bringing the tip side close to the part to be harvested, the forceps pieces 5,
6 opens. Therefore, when the operating body 13 is pulled forward after wrapping the tissue to be collected between the forceps pieces 5 and 6, the forceps pieces 5 and 6 close with the tissue sandwiched therebetween. Furthermore, when the insertion section 2 is pulled with some force, the portion of the tissue sandwiched between the blade section 14 and the receiving blade 15 is broken, and the tissue can be cut out from the living body.

As explained above, in the endoscopic forceps of the present invention, the peripheral edges of the forceps pieces that engage and touch each other, which open and close, are formed as a sharp cutting edge on one forceps piece, and the tip of the other forceps piece is formed as a sharp cutting edge. As a flat surface, the cutting edge and the flat surface are designed to mesh with each other. Therefore, unlike a blade with both edges of each peripheral edge being flat, it cuts well, and compared to a blade with sharp edges on both sides, the sharpness deteriorates less, and the durability of the sharpness is greatly increased. It can be greatly improved. In addition, since only one side needs to have a sharp cutting edge, processing is easier and costs can be reduced. Also,
Since the outer surfaces of the engaging portions of the peripheral edges of the opening and closing forceps pieces that engage and touch each other are formed to be approximately the same surface, when the forceps are inserted into the channel of the endoscope, the inner wall of the channel There is no need to remove it.

[Brief explanation of drawings]

FIG. 1 is an overall side view of an endoscopic forceps showing an embodiment of the present invention, and FIG. 2 is a side sectional view of a portion of the forceps. DESCRIPTION OF SYMBOLS 1... Endoscope forceps, 2... Insertion part, 5... Forceps piece, 6... Forceps piece, 11... Operation part, 14...
Blade part, 15... Ukeblade.

Claims (1)

[Claims] 1. An endoscope in which a forceps main body is provided at the tip of the insertion section, a pair of forceps pieces are attached to the forceps main body so that they can be opened and closed, and the forceps pieces can be opened and closed by remote control from an operating section on the proximal side of the insertion section. In mirror forceps, the peripheral edges of the forceps pieces that engage and touch each other, which open and close, are formed as a sharp cutting edge in one forceps piece, and the tip of the other forceps piece is formed as a flat surface, and 1. A forceps for an endoscope, characterized in that the outer surfaces of the engaging portions of each forceps piece are formed to be substantially the same surface.