US006152924A [ii] Patent Number: 6,152,924  Date of Patent: Nov. 28,2000
 BIPOLAR BIOPSY FORCEPS
 Inventor: David J. Parins, 6801 Olde Sturbridge Dr., Corcoran, Minn. 55340
 Appl. No.: 09/404,694  Filed: Sep. 24, 1999
 Int. CI. A61B 17 00
 U.S. CI 606/52; 606/174; 606/205
 Field of Search 606/1, 51, 52,
 References Cited
U.S. PATENT DOCUMENTS 5,603,711 2/1997 Parins et al. .
5,603,723 2/1997 Aranyi et al 606/52
5,743,906 4/1998 Parins et al. .
6,039,733 3/2000 Buysse et al 606/51
Primary Examiner—Michael Buiz
Assistant Examiner—-William Lewis
Attorney, Agent, or Firm—Nikolai, Mersereau & Dietz, P.A.
An endoscopic bipolar forceps comprises an elongated tubular member dimensioned to fit through the working lumen ol an endoscope where the tubular member includes a handle at its proximal end and a pair ol end effectors at its distal end and with a lumen extending between them. The end effectors each have a metal tissue cutting and tissue sample capturing and retaining element lacing one another and capable ol being open and closed by manipulating the handle. Each ol the end effectors includes an electrode supported by and insulated from it. A push rod coupling the handle to the end effectors for inducing the pivotal movement thereol also serves as an electrical conductor for applying a first potential to the metal tissue cutting and tissue sample capturing and retaining element. A second conductor extends through the lumen ol the tubular member and is electrically connected to the electrodes on each ol the end effectors. With this arrangement, an electrocautery voltage is developed between an electrode and the metal tissue cutting and tissue sample capturing element that supports that electrode.
4 Claims, 3 Drawing Sheets