Time dependent evaluation of sensor data to determine stability, creep, and viscoelastic elements of measures

  • US 10,206,605 B2
  • Filed: 09/14/2015
  • Issued: 02/19/2019
  • Est. Priority Date: 03/06/2015
  • Status: Active Grant
First Claim
Patent Images

1. A surgical instrument for cutting and stapling tissue, wherein the surgical instrument comprises:

  • a shaft;

    an end effector comprising a distal end;

    at least one load condition sensor for sensing at least one load condition of the end effector;

    a drive system configured to transmit a drive load, the drive system comprising;

    a firing member movable toward the distal end during a firing stroke; and

    a motor configured to move the firing member through the firing stroke; and

    a motor control circuit configured to operate the motor in;

    a first operating mode when the drive load is below a predetermined threshold, wherein the motor control circuit controls a drive current that is supplied to the motor in the first operating mode; and

    a second operating mode when the drive load is above a predetermined threshold, wherein the motor control circuit increases the drive current that is supplied to the motor based on the rate of change of the at least one load condition in the second operating mode.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×