FORCEPS

• US 3,791,387 A
• Filed: 03/05/1973
• Issued: 02/12/1974
• Est. Priority Date: 12/05/1970
• Status: Expired due to Term

• Current Assignee: Mitsuto Itoh
• Original Assignee: Mitsuto Itoh
• Inventors: Itoh, Mitsuto
• Primary Examiner(s): Medbery, Aldrich F.
• Application Number:
  US05/338,174
• Time in Patent Office: 344 Days
• Field of Search: 128/306,309,320,356
• US Class Current: 606/113
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 17/30 Surgical pincettes without pivotal connectionsfor holding suture needles or materials A61B17/0483; wound clamps A61B17/08 ; hand-held gripping tools without pivotal connections in general B25B9/02
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26

Abstract

A forceps for use with an endoscope has a first or cutting wire which extends in a loop from the distal end of the flexible endoscope tube, whereas the two proximal ends may be shifted in the tube by means of a control mechanism on the proximal tube end so as to expand and contract the loop. A second wire has a distal end pivotally attached to the loop, while its main portion passes through the endoscope tube to a control device at the proximal end of the tube which permits the second wire to be shifted longitudinally in the tube, and thereby to be bulged out from the loop for receiving a polyp or the like, and to be tightened about the severed polyp for safely retracting the severed piece together with the forceps.

Claims

1. A forceps for use with an endoscope comprising:

a. a flexible, elongated tube having a distal end portion and a proximal end portion;

b. a first elongated wire having two branch portions and an arcuate loop portion connecting said branch portions, said loop portion projecting from said distal end portion, and said branch portions extending from said loop portion toward said proximal end portion and being movably received in said tube;

c. a second wire having a terminal portion pivotally secured to a part of said loop portion remote from said distal end portion in a direction away from said proximal end portion, said second wire being movably received in said tube and extending from said terminal portion toward said proximal end portion;

d. first control means on said proximal end portion and operatively connected to said branch portions for shifting the same longitudinally in said tube, whereby the loop defined by said loop portion may be expanded and contracted, and a polyp captured in said loop may be severed by contracting said loop; and

e. second control means on said proximal end portion and operatively connected to said second wire for shifting the same longitudinally in said tube to provide a means for securing a polyp severed by said contracting loop portion for subsequent removal with said forceps.

2. A forceps as set forth in claim 1, wherein said part of said loop portion constitutes a bight portion having a smaller radius of curvature than the remainder of said loop portion, said terminal portion being pivotally secured to said bight portion.

3. A forceps as set forth in claim 1, further comprising a forked connecting piece attached to said part of said loop portion and defining a slot, said terminal portion being received in said slot, and a pin member attached to said connecting piece, a portion of said pin member being located in said slot and securing said terminal portion to said connecting piece.

4. A forceps as set forth in claim 1, further comprising a first eye on said part of said loop portion and a second eye on said terminal portion of the second wire, said first and second eyes being pivotally interengaged.