公开(公告)号：US20220008114A1

公开(公告)日：2022-01-13

申请号：US17486185

申请日：2021-09-27

Applicant: Covidien LP

Inventor： Jennifer R. McHenry ,  Alexander M. Waskiewicz ,  Anthony D. Ricke ,  Rebecca J. Coulson ,  Jessica E.C. Olson

IPC: A61B18/12 ,  A61B18/14

Abstract: The electrosurgical systems and corresponding methods of the present disclosure involve an electrosurgical generator, sensing circuitry, and a controller. The electrosurgical generator includes a radio frequency (RF) output stage that supplies power to tissue. The sensing circuitry measures impedance of tissue. The controller controls the power supplied from the RF output stage to track a nonlinear power curve until the power supplied from the RF output stage has reached a predetermined peak power of the nonlinear power curve. The controller further determines whether a tissue reaction has occurred based on impedance measured by the sensing circuitry and controls the power supplied from the RF output stage during a cooling phase if the controller determines that a tissue reaction has occurred. The controller may further control the power supplied from the RF output stage to track a linear power curve.

公开(公告)号：US20210100603A1

公开(公告)日：2021-04-08

申请号：US17124660

申请日：2020-12-17

Applicant: Covidien LP

Inventor： Jennifer R. McHenry ,  Alexander M. Waskiewicz ,  Anthony D. Ricke ,  Rebecca J. Coulson ,  Jessica E.C. Olson

IPC: A61B18/12 ,  A61B18/14

Abstract: The electrosurgical systems and corresponding methods of the present disclosure involve an electrosurgical generator, sensing circuitry, and a controller. The electrosurgical generator includes a radio frequency (RF) output stage that supplies power to tissue. The sensing circuitry measures impedance of tissue. The controller controls the power supplied from the RF output stage to track a nonlinear power curve until the power supplied from the RF output stage has reached a predetermined peak power of the nonlinear power curve. The controller further determines whether a tissue reaction has occurred based on impedance measured by the sensing circuitry and controls the power supplied from the RF output stage during a cooling phase if the controller determines that a tissue reaction has occurred. The controller may further control the power supplied from the RF output stage to track a linear power curve.

公开(公告)号：US20210022790A1

公开(公告)日：2021-01-28

申请号：US17065010

申请日：2020-10-07

Applicant: Covidien LP

Inventor： Craig V. Krastins ,  James D. Allen, IV ,  Jessica E.C. Olson ,  Jason G. Weihe ,  Purvish Soni

IPC: A61B18/12 ,  A61B90/00 ,  A61B17/26 ,  A61B17/29 ,  A61B18/14

Abstract: A surgical instrument includes a housing, a shaft extending therefrom, an end effector assembly supported by the shaft, a movable handle, and a drive assembly. The drive assembly includes a translatable drive member for actuating the end effector assembly, and a torsion spring including first and second legs. The first leg is configured to translate through the housing in response to movement of the movable handle relative to the housing. The second leg is configured to translate through the housing in cooperation with the first leg to move the drive member longitudinally when a force acting on the drive member is less than a threshold force, and to remain in fixed position, thereby tensioning the torsion spring and retaining the drive member in fixed position when the force acting on the drive member is equal to or exceeds the threshold force.

公开(公告)号：US20200237427A1

公开(公告)日：2020-07-30

申请号：US16847778

申请日：2020-04-14

Applicant: Covidien LP

Inventor： Jennifer R. McHenry ,  Alexander M. Waskiewicz ,  Anthony D. Ricke ,  Rebecca J. Coulson ,  Jessica E.C. Olson

IPC: A61B18/12 ,  A61B18/14

Abstract: The electrosurgical systems and corresponding methods of the present disclosure involve an electrosurgical generator, sensing circuitry, and a controller. The electrosurgical generator includes a radio frequency (RF) output stage that supplies power to tissue. The sensing circuitry measures impedance of tissue. The controller controls the power supplied from the RF output stage to track a nonlinear power curve until the power supplied from the RF output stage has reached a predetermined peak power of the nonlinear power curve. The controller further determines whether a tissue reaction has occurred based on impedance measured by the sensing circuitry and controls the power supplied from the RF output stage during a cooling phase if the controller determines that a tissue reaction has occurred. The controller may further control the power supplied from the RF output stage to track a linear power curve.