US 12,004,771 B1
Rotational atherectomy devices and methods
Jihad A. Mustapha, Ada, MI (US); Gary M. Petrucci, Long Lake, MN (US); Albert Selden Benjamin, St. Paul, MN (US); and Ryan D. Welty, Blaine, MN (US)
Assigned to Cardio Flow, Inc., St. Paul, MN (US)
Filed by Cardio Flow, Inc., St. Paul, MN (US)
Filed on Nov. 29, 2023, as Appl. No. 18/523,683.
Claims priority of provisional application 63/542,438, filed on Oct. 4, 2023.
Claims priority of provisional application 63/523,583, filed on Jun. 27, 2023.
Int. Cl. A61B 17/3207 (2006.01)
CPC A61B 17/320758 (2013.01) [A61B 17/3207 (2013.01); A61B 17/320725 (2013.01); A61B 2017/320766 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A rotational atherectomy system for removing stenotic lesion material from a pedal artery or coronary artery of a patient, comprising:
a 4-French introducible rotational atherectomy device, comprising:
a torque-transmitting coil of one or more filars that are helically wound around in a filar wind direction from a distal end to a proximal end to define a coil diameter and a drive shaft axis, wherein the torque-transmitting coil has an outer coil diameter and each abrasive burr in the series of abrasive burrs has a respective burr diameter, wherein a burr-to-coil diameter ratio define by each respective burr diameter and the outer coil diameter is about 1.2-1.7; and
a series of abrasive burrs fixedly mounted to a distal end portion of the torque-transmitting coil and having a maximum burr diameter of no greater than 1.25 mm, wherein the series of abrasive burrs includes a distal concentric abrasive burr coaxially mounted to a distal-most end of the torque-transmitting coil, a proximal concentric abrasive burr having the same size as the distal concentric abrasive burr and being coaxially mounted to the torque-transmitting coil at a position no greater than 0.5-inches from the distal-most end of the torque-transmitting coil, and an intermediate eccentric abrasive burr having a larger size than the distal and proximal concentric abrasive burrs and being mounted to the torque-transmitting coil with a center of mass offset from the drive shaft axis; and
a rotational atherectomy handle assembly coupled to the proximal end of the torque-transmitting coil and housing an electric motor configured to, responsive to user input at an actuator of the rotational atherectomy handle assembly, drive rotation of the series of abrasive burrs about the drive shaft axis in a rotational direction.