Patent ID: 11937844
Assignee: MINERVA SURGICAL, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 10:
11. A tissue resecting device, comprising:
an assembly including an outer member having a tissue-receiving window and an inner member movably positioned within the outer member, the inner member having a resecting element at a distal end thereof;
a handle;
a motor drive system carried in the handle and a controller configured for moving the resecting element of the inner member across the tissue-receiving window of the outer member to resect tissue;
the motor drive system including a motor and a motor shaft driving a rotation-to-linear motion conversion mechanism to reciprocate the inner member through at least one full distal and proximal reciprocation stroke via 360 degree rotation of the rotation-to-linear motion conversion mechanism in a first rotational direction, wherein a distal edge of the resection element moves back and forth across the window of the outer member from a window open position to a window closed position;
wherein the controller includes an algorithm configured to stop reciprocation of the inner member with the distal edge of the resecting element at a stop position in which the tissue-receiving window is partially open;
wherein the rotation-to-linear motion conversion mechanism includes a rotatable drive collar; and
a microswitch, wherein the microswitch engages an indent in the drive collar once each revolution of the drive collar;
wherein the microswitch sends an electrical signal to the controller for each instance the microswitch engages the indent;
wherein the controller is configured to de-energize the motor at a point Y between a reference point in which the microswitch engages the indent and the stop position.