Surgery – Instruments – Forceps
Reexamination Certificate
1999-10-04
2001-10-09
Recla, Henry J. (Department: 3731)
Surgery
Instruments
Forceps
C606S208000, C606S170000
Reexamination Certificate
active
06299630
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an endoscopic procedural device for performing surgical procedures with tissue or the like of a body while being inserted into a body cavity through a forceps-channel of an endoscope.
For example, an endoscopic procedural device is provided with a flexible insert section that can be inserted through a forceps-channel of an endoscope. An operating wire is inserted in the interior of the insert section along its axial direction in such a way that the wire can freely moved forward or backward. The operating wire is connected not only to an operating section at a proximal end of the insert section, but to a procedural member at a distal end of the insert section. With such a construction, the operating wire is moved forward or backward and the procedural member is opened or closed in response to operations of the operating section.
Endoscopic procedural devices of this kind have been disclosed, for example, in U.S. Pat. Nos. 5,666,965 and 5,133,727, and Jpn. Pat. Appln. KOKAI Publication Nos. 10-118089 and 10-179601.
In U.S. Pat. Nos. 5,666,965 and 5,133,727, and Jpn. Pat. Appln. KOKAI Publication No. 10-118089A, a connecting structure, in which a procedural member and an operating wire inserted though an insert section so that the wire can freely moved forward or backward, are connected, the operating wire is passed through a hole formed in a procedural member and a distal end of the operating wire that has passed through the hole is sharply bent and fixed on the procedural member. In Jpn. Pat. Appln. KOKAI Publication No. 10-179601, link wires are respectively passed through a pair of connecting holes formed at the proximal end sides of respective procedural members and both ends of each link wire are fixed on a distal end of an operating wire.
However, in the connecting structure of the former documents, as shown in
FIG. 33
, in a case where an endoscopic procedural device a is inserted through an inside hole of a forceps-channel c of the endoscope b and a procedural member d is protruded into a body cavity, an inner surface of the forceps-channel channel c is heavily damaged and in the worst case, a hole is opened through the wall portion of the forceps-channel to destroy the endoscope b by an edge f of the distal end of the operating wire e for opening or closing of the procedural member d if the endoscope b is bent and thereby, the forceps-channel c is curved like an arc with a large radius of curvature. In this case, such troubles may lead to significant repair costs.
Further, in the connecting structure of the latter document, since two pieces of link wires are virtually connected to one procedural member and two procedural members are activated with the four pieces of link wires in total, movements of the endoscopic procedural device becomes heavy due to excessively high rigidity of the link wires and the operability feeling is problematically deteriorated.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide an endoscopic procedural device that has no chance to damage a forceps-channel of an endoscope even when the endoscope is bent, which has not only a good operability feeling, but a simple construction easy to assemble and to produce at a low cost, and which secures safety in use.
The object of the present invention is achieved by the following endoscopic procedural device. That is, an endoscopic procedural device according to the present invention comprises: an insert section that has an inside hole extending along its axial direction, and which has flexibility to enable its insertion through a forceps-channel of an endoscope; at least one operating wire that is inserted in the inside hole of the insert section, and which is freely moved forward or backward along the axial direction of the insert section; an operating section that is connected to a proximal end of the insert section, and which is used for moving the operating wire forward or backward; a procedural section holding member connected to a distal end of the insert section; at least one procedural member that is mounted to a distal end of the procedural section holding member in a rotatable manner, and which has one through-hole at its proximal end side, to which one of the operating wires is connected, wherein the one through-hole has a first opening end, on one side of a procedural member, at a position farther from the center axis of the insert section, and a second opening end, on the other side of the procedural member, at a position closer to the center axis of the insert section; and a distal end portion of an operating wire is not only inserted into the one through-hole toward the center axis side of the insert section from the first opening end, but protruded outside the one through-hole from the second opening end and the protruded distal end portion of the operating wire is positioned in the vicinity of the second opening end.
Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter.
REFERENCES:
patent: 5133727 (1992-07-01), Bales et al.
patent: 5666965 (1997-09-01), Bales et al.
patent: 5810876 (1998-09-01), Kelleher
patent: 10-118089A (1998-05-01), None
patent: 10-179601 (1998-07-01), None
Frishauf, Holtz Goodman, Langer & Chick, P.C.
Olympus Optical Co,. Ltd.
Recla Henry J.
Woo Julian W.
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