US 12,245,789 B2
Method and system for controlling rotational speed of an agitator or catheter
Yuki Masubuchi, Kanagawa (JP); Steve Woodard, Newark, CA (US); and Mansour Saleki, Newark, CA (US)
Assigned to TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed by TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed on Oct. 22, 2021, as Appl. No. 17/451,885.
Application 17/451,885 is a continuation of application No. 16/354,795, filed on Mar. 15, 2019, granted, now 11,337,724.
Prior Publication US 2022/0039824 A1, Feb. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/3207 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/32075 (2013.01) [A61B 17/320725 (2013.01); A61B 2017/00017 (2013.01); A61B 2017/00075 (2013.01); A61B 2017/00398 (2013.01); A61B 2017/00867 (2013.01); A61B 2017/00893 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device handle for cutting substances inside a body lumen, the device handle comprising:
a motor configured to impart a rotational force to a drive shaft assembly and a processor, wherein the processor is configured to:
control a driving of the drive shaft assembly at a target rotational speed in a first direction;
detect an actual rotational speed of the drive shaft assembly in the first direction;
compare the target rotational speed and the actual rotational speed of the drive shaft assembly in the first direction; and
stop the driving of the drive shaft assembly in the first direction before a completion of predetermined number of rotations in the first direction when the actual rotational speed decreases a predetermined percentage over a predetermined time frame.