US 11,937,844 B2
Tissue resecting systems and methods
Robin Bek, Campbell, CA (US); and Aaron Germain, Campbell, CA (US)
Assigned to MINERVA SURGICAL INC., Santa Clara, CA (US)
Filed by MINERVA SURGICAL, INC., Santa Clara, CA (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,608.
Application 17/545,608 is a continuation of application No. 16/277,897, filed on Feb. 15, 2019, granted, now 11,207,093.
Application 16/277,897 is a continuation of application No. 15/291,655, filed on Oct. 12, 2016, granted, now 10,238,412, issued on Mar. 26, 2019.
Application 15/291,655 is a continuation of application No. 14/249,161, filed on Apr. 9, 2014, granted, now 9,486,233, issued on Nov. 8, 2016.
Claims priority of provisional application 61/816,371, filed on Apr. 26, 2013.
Prior Publication US 2022/0096111 A1, Mar. 31, 2022
Int. Cl. A61B 17/32 (2006.01); A61B 50/13 (2016.01); A61B 17/00 (2006.01)
CPC A61B 17/32002 (2013.01) [A61B 50/13 (2016.02); A61B 2017/00017 (2013.01); A61B 2017/00075 (2013.01); A61B 2017/320028 (2013.01); A61B 2217/007 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A tissue resecting device, comprising:
an assembly of tubular first and second members, the second 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 second member across a window of the first member;
the motor drive system including a motor and a motor shaft driving a rotation-to-linear motion conversion mechanism, wherein a distal edge of the second member moves back and forth across the window of the first member from a window open position to a window closed position;
wherein the controller includes an algorithm configured to stop reciprocation of the second member with the distal edge of the second member 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 engagement feature of 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 engagement feature;
wherein the controller is configured to de-energize the motor at a point Y between a reference point in which the microswitch engages the engagement feature and the stop position.