US 12,408,943 B2
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 Jul. 16, 2024, as Appl. No. 18/774,078.
Application 18/658,372 is a division of application No. 18/523,683, filed on Nov. 29, 2023, granted, now 12,004,771, issued on Jun. 11, 2024.
Application 18/774,078 is a continuation of application No. 18/658,372, filed on May 8, 2024, granted, now 12,193,702.
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.
Prior Publication US 2025/0000541 A1, Jan. 2, 2025
This patent is subject to a terminal disclaimer.
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)] 21 Claims
OG exemplary drawing
 
1. A rotational atherectomy system for slidable insertion through a 4-French introducer sheath, 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 an outer coil diameter and a drive shaft axis;
a concentric tip member fixed to and extending distally from a distal-most end of the torque-transmitting coil;
a distal concentric cylindrical abrasive element fixedly mounted to an exterior of the torque-transmitting coil such that the distal-most end of the torque-transmitting coil concealed by the distal stability element and the concentric tip member; and
a series of abrasive eccentric burrs fixedly mounted to the torque-transmitting coil at a position spaced proximally from the distal concentric cylindrical abrasive element and having a maximum burr diameter of no greater than 1.25 mm such that a burr-to-coil diameter ratio defined by each respective burr diameter and the outer coil diameter is 1.7 or less, wherein the series of abrasive eccentric burrs includes a distal eccentric abrasive burr, an intermediate eccentric abrasive burr, and a proximal eccentric abrasive burr that are equally sized and mounted in an eccentric spiral arrangement along the torque-transmitting coil so that centers of mass for the distal, intermediate, and proximal abrasive eccentric burrs are offset from the drive shaft axis in different planes; and
a rotational atherectomy handle assembly coupled to a 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 drive direction.