Blood vessel coagulation/stanching device
First Claim
1. In a bipolar-type blood vessel coagulation/stanching device having a pair of conductive forceps including blood vessel holding sections provided at end portions of said forceps and adapted to cauterize, coagulate and stanch said blood vessel, the improvement comprising:
- an electrically and thermally insulative blood vessel contact member of sintered substance provided at each of said end portions, each of said contact members having a blood vessel contact surface which includes a plurality of exposed electrodes at an areal ratio between 5% and 60% to the entire surface area of said blood vessel contact surface of said blood vessel contact member.
1 Assignment
0 Petitions
Accused Products
Abstract
A blood vessel coagulation/stanching device for flowing high-frequency current between a pair of forceps with a blood vessel being held between the ends of the forceps to cauterize, coagulate and stanch the blood vessel, the device being characterized in that the blood vessel holding section of the forceps comprises a blood vessel contact member made of an electrically insulating sintered substance with a low thermal conductivity, and the blood vessel contact member being provided on its surface with exposed electrodes at an areal ratio between 5% and 60% to the entire surface of the blood vessel contact member. With this device, the blood vessel contact section of the forceps is not excessively heated, preventing a blood vessel from burning. This eliminates any stanching failure due to removal of a coagulated blood vessel portion and ensures superior coagulation and stanching. In addition, the exposed electrode disposed at the frontest end of the forceps has cutting, coagulation and stanching functions so that a single unit of the device can be used for coagulation, stanching and cutting.
1224 Citations
20 Claims
-
1. In a bipolar-type blood vessel coagulation/stanching device having a pair of conductive forceps including blood vessel holding sections provided at end portions of said forceps and adapted to cauterize, coagulate and stanch said blood vessel, the improvement comprising:
an electrically and thermally insulative blood vessel contact member of sintered substance provided at each of said end portions, each of said contact members having a blood vessel contact surface which includes a plurality of exposed electrodes at an areal ratio between 5% and 60% to the entire surface area of said blood vessel contact surface of said blood vessel contact member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
9. A device for passing current through living tissue to coagulate the tissue, comprising:
-
a pair of elongated members, said elongated members being adapted to be brought into physical proximity to each other at a distal end of each elongated member, each elongated member having an electrically insulative and thermally insulative tissue contact member provided at its associated distal end, each tissue contact member having a tissue contact surface opposing the tissue contact surface of the other tissue contact member, each tissue contact surface having a plurality of electrodes, each electrode having a predetermined size and spacing from the other electrodes of the tissue contact surface so as to inhibit overheating of the tissue contact surface by the coagulated tissue; and coupling means for insulatively coupling said members at proximal ends thereof. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A blood vessel coagulation/stanching device comprising:
-
a pair of electrically conductive elongated members; coupling means for insulatively coupling said members at proximal ends thereof; an electrically and thermally insulative ceramic tissue contact member provided adjacent a distal end of each of the elongated members, each of said tissue contact members further having a polished tissue contact surface and defining a plurality of through holes substantially uniformly dispersed over said tissue contact polished surface of said tissue contact member at an areal ratio between 5% and 60% to the entire area of said tissue contact surface of said tissue contact member; a plurality of electrodes of conductive resin adhesive received in said through holes and being exposed at said tissue contact surface of each of said tissue contact members; and a conductive resin adhesive layer provided between each non-conductive tissue contact member and the associated conductive elongated member thereby electrically coupling said electrodes and the associated conductive elongated member. - View Dependent Claims (20)
-
Specification