US 11,832,844 B2
Atherectomy devices and methods
Cassandra Ann Piippo Svendsen, Blaine, MN (US); Ryan D. Welty, Blaine, MN (US); and Michael Kallok, St. Paul, MN (US)
Assigned to Cardio Flow, Inc., St. Paul, MN (US)
Filed by Cardio Flow, Inc., St. Paul, MN (US)
Filed on Feb. 4, 2022, as Appl. No. 17/592,797.
Application 17/592,797 is a continuation of application No. 16/530,284, filed on Aug. 2, 2019, granted, now 11,272,954.
Claims priority of provisional application 62/715,643, filed on Aug. 7, 2018.
Prior Publication US 2022/0151654 A1, May 19, 2022
Int. Cl. A61B 17/3207 (2006.01); A61B 17/32 (2006.01); A61B 17/22 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/320758 (2013.01) [A61B 17/32002 (2013.01); A61B 17/32075 (2013.01); A61B 2017/0042 (2013.01); A61B 2017/00398 (2013.01); A61B 2017/22038 (2013.01); A61B 2017/22094 (2013.01); A61B 2017/320004 (2013.01); A61B 2017/320741 (2013.01); A61B 2017/320775 (2013.01); A61B 2217/007 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A rotational atherectomy device, comprising:
a torque-transmitting coil slidably and rotatably disposed within a lumen of a sheath such that at least one eccentric abrasive element fixedly mounted to a distal end portion of the torque-transmitting coil is positioned distally of a distal end of the sheath; and
a rotational atherectomy control handle to control rotation of the torque-transmitting coil, including:
an outer handle housing having a front portion connected with a proximal end of the sheath and a rear portion, the outer handle housing surrounding both an electric motor to drive rotation of the torque-transmitting coil and a controller assembly that regulates a rotational speed of the torque-transmitting coil and that activates the electric motor to rotate the torque-transmitting coil in response to actuation of an atherectomy trigger button;
a carriage assembly slidably translatable in a longitudinal direction relative to the outer handle housing so as to longitudinally translate the torque-transmitting coil, the electric motor, and the atherectomy trigger button relative to the outer handle housing;
a guidewire access port located at the rear portion of the outer handle housing;
a guidewire clamp actuator located at the rear portion of the outer handle housing and being movable relative to the outer handle housing to releasably lock a guidewire in a selected position relative to the outer handle housing,
wherein responsive to detecting that the guidewire clamp actuator is arranged in an unlocked position for releasing the guidewire, the controller assembly housed within the outer handle housing is configured to prevent the electric motor from driving rotation of the torque-transmitting coil for rotational atherectomy; and
a user interface disposed along the outer handle housing including: the atherectomy trigger button movable relative to the outer handle housing parallel to a longitudinal slot defined by the outer handle housing and being in communication with the controller assembly housed within the outer handle housing, a plurality of rotation speed control buttons positioned along the outer handling housing rearward of the atherectomy trigger button and the longitudinal slot and being configured to input a selected rotational speed setting for the torque-transmitting coil, a fluid delivery button positioned along the outer handling housing rearward of the plurality of rotation speed control buttons and being configured to initiate delivery of fluid through the sheath, and a guidewire clamp light that emits a light in response to activation of the guidewire clamp actuator and being positioned along the outer handling housing rearward of the fluid delivery button and the plurality of rotation speed control buttons.