US 11,712,287 B2
Grasper tool with coagulation
Assaf Govari, Haifa (IL); Yehuda Algawi, Binyamina (IL); Vadim Gliner, Yokneam (IL); Ilya Sitnitsky, Nahariya (IL); and Andres Claudio Altmann, Haifa (IL)
Assigned to Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed by BIOSENSE WEBSTER (ISRAEL) LTD., Yokneam (IL)
Filed on Feb. 21, 2020, as Appl. No. 16/797,586.
Claims priority of provisional application 62/835,916, filed on Apr. 18, 2019.
Prior Publication US 2020/0330150 A1, Oct. 22, 2020
Int. Cl. A61B 18/14 (2006.01); A61B 34/20 (2016.01); A61B 34/30 (2016.01); A61B 18/00 (2006.01); A61B 18/12 (2006.01)
CPC A61B 18/1445 (2013.01) [A61B 2018/00023 (2013.01); A61B 2018/00107 (2013.01); A61B 2018/00327 (2013.01); A61B 2018/00446 (2013.01); A61B 2018/00589 (2013.01); A61B 2018/1266 (2013.01); A61B 2034/2063 (2016.02); A61B 2034/303 (2016.02); A61B 2218/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A medical system, comprising:
(a) a medical instrument including:
(i) a grasper head comprising:
(A) first and second grasping jaws; and
(B) first and second conducting surfaces disposed on respective distal portions of the first and second grasping jaws, the first and second conducting surfaces being electrically isolated from each other in the grasper head;
(ii) an actuator configured to actuate the grasping jaws from an open state to a closed state so as to bring the first and second conducting surfaces into contact with a tissue of an anatomical structure of a patient; and
(iii) a proximity sensor configured to output at least one proximity signal responsive to a displacement between the first and second grasping jaws, wherein the proximity sensor comprises two electrical contacts disposed on the grasper head and configured to make mutual contact with each other when the displacement between the first and second grasping jaws is less than a given threshold displacement, wherein respective ones of the electrical contacts are connected to the grasper head via respective springs configured to urge the grasping jaws from the closed state toward the open state; and
(b) processing circuitry configured to:
(i) sense the displacement between the first and second grasping jaws responsively to the at least one proximity signal, and
(ii) apply an electrical current between the first and second conducting surfaces of the grasping jaws when the sensed displacement is less than the given threshold displacement,
wherein each of the electrical contacts is electrically connected to the processing circuitry independently of the other of the electrical contacts.