Patent ID: 11896222
Assignee: CILAG GMBH INTERNATIONAL
Field: Medical technology (Instruments)
Classification: CPC A  H  Y | IPC A  H

Claim 14:
15. A surgical fastening system, comprising:
an end effector, comprising:
an elongate channel;
an anvil, wherein the elongate channel and the anvil are configurable between an open configuration and a closed configuration; and
a fastener cartridge removably positioned in the elongate channel, wherein the fastener cartridge comprises a plurality of fasteners removably stored therein;

a firing member movable between a first position and a second position;
a motor configured to drive the firing member toward the second position;
a current sensor configured to sense a current draw of the motor; and
a controller, configured to:
set, by the controller, a target speed range of the firing member based on a current draw of the motor sensed by the current sensor at a closure end position, wherein the closure end position corresponds to the elongate channel and the anvil being placed in the closed configuration, and wherein the target speed range is between a first non-zero speed value and a second non-zero speed value;
set, by the controller, a threshold current draw range corresponding to the target speed range of the firing member, wherein the threshold current draw range is between a first non-zero current value and a second non-zero current value;
move, by the motor, the firing member toward the second position at a speed within the target speed range;
monitor, by the current sensor, a current draw of the motor as the firing member is moved toward the second position at the speed within the target speed range;
compare, by the controller, the monitored current draw to the threshold current draw range; and
adjust, by the controller, the speed of the firing member based on the monitored current draw crossing below the first non-zero current value corresponding to the threshold current draw range or above the second non-zero current value corresponding to the threshold current draw range.