公开(公告)号：US20230056328A1

公开(公告)日：2023-02-23

申请号：US17891811

申请日：2022-08-19

Applicant: Intuitive Surgical Operations, Inc.

Inventor： Forrest R. Lundstrom ,  Rajeshwari Srinivasan

IPC: A61B18/12 ,  A61B18/14

Abstract: An electrosurgical system includes an RF output stage configured to impart RF power between first and second electrodes; measurement circuitry measures current and voltage imparted between the first and second electrodes; a processing circuit calculates power and impedance, based upon the measured current and the measured voltage; the processing circuitry uses a proportional-integral-derivative control loop to control RF power imparted between the electrodes, based upon a selected one of the measured current, the measured voltage, calculated power, and the calculated impedance.

公开(公告)号：US20210093369A1

公开(公告)日：2021-04-01

申请号：US16956492

申请日：2018-12-19

Applicant: Intuitive Surgical Operations, Inc.

Inventor： Jignesh M. Shah ,  Jason W Hemphill ,  Forrest R. Lundstrom ,  Duane W. Marion

IPC: A61B18/12 ,  A61B18/14

Abstract: A method is provided to seal and cut biological tissue. An alternating current (AC) scaling signal is imparted between a set of sealing electrodes. An AC cutting signal is imparted between a set of cutting electrodes in response to a biological tissue impedance between the sealing electrodes reaching a first impedance threshold value. The AC scaling signal is halted at an end of a time interval, beginning while the AC cutting signal is imparted between the cutting electrodes, in response to impedance of the biological tissue disposed between the set of sealing electrodes reaching a second impedance threshold value.

公开(公告)号：US12150692B2

公开(公告)日：2024-11-26

申请号：US16956492

申请日：2018-12-19

Applicant: Intuitive Surgical Operations, Inc.

Inventor： Jignesh M. Shah ,  Jason W. Hemphill ,  Forrest R. Lundstrom ,  Duane W. Marion

IPC: A61B18/12 ,  A61B18/14 ,  A61B17/00 ,  A61B18/00 ,  A61B34/35

Abstract: A method is provided to seal and cut biological tissue. An alternating current (AC) scaling signal is imparted between a set of sealing electrodes. An AC cutting signal is imparted between a set of cutting electrodes in response to a biological tissue impedance between the sealing electrodes reaching a first impedance threshold value. The AC scaling signal is halted at an end of a time interval, beginning while the AC cutting signal is imparted between the cutting electrodes, in response to impedance of the biological tissue disposed between the set of sealing electrodes reaching a second impedance threshold value.