US 10,888,351 B2
Eccentric system of abrasive elements with equal mass for rotational atherectomy
Matthew D. Cambronne, North Oaks, MN (US)
Assigned to Cardiovascular Systems, Inc., St. Paul, MN (US)
Filed by Cardiovascular Systems, Inc., St. Paul, MN (US)
Filed on Sep. 4, 2018, as Appl. No. 16/120,662.
Application 15/906,067 is a division of application No. 15/904,768, filed on Feb. 26, 2018, granted, now 10,123,817.
Application 15/904,768 is a division of application No. 15/880,683, filed on Jan. 26, 2018, abandoned.
Application 15/880,683 is a division of application No. 15/059,349, filed on Mar. 3, 2016, granted, now 10,052,124, issued on Aug. 21, 2018.
Application 15/059,349 is a division of application No. 13/621,398, filed on Sep. 17, 2012, granted, now 9,289,230, issued on Mar. 22, 2016.
Application 16/120,662 is a continuation of application No. 15/906,067, filed on Feb. 27, 2018, granted, now 10,064,646, issued on Feb. 27, 2018.
Prior Publication US 2018/0368881 A1, Dec. 27, 2018
Int. Cl. A61B 17/3207 (2006.01); A61M 25/09 (2006.01); A61B 17/32 (2006.01)
CPC A61B 17/320758 (2013.01) [A61B 17/3207 (2013.01); A61B 2017/320004 (2013.01); A61B 2017/320032 (2013.01); A61B 2017/320766 (2013.01); A61M 25/09 (2013.01); A61M 2025/09083 (2013.01); A61M 2025/09183 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A rotational atherectomy device, comprising:
a flexible, elongated and rotatable drive shaft, the drive shaft comprising a rotational axis;
a system of abrasive elements comprising:
a first eccentric abrasive element fixedly disposed on the drive shaft and comprising a mass, a resting diameter, and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a first longitudinal plane located at a first rotational angle position;
a second eccentric abrasive element fixedly disposed on the drive shaft and spaced proximally from the first abrasive element and comprising a mass, a resting diameter, and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a second longitudinal plane that is spaced rotationally a distance from the first longitudinal plane;
and a third abrasive element fixedly disposed on the drive shaft and spaced distally from the first abrasive element, and comprising a mass and a resting diameter,
wherein the resting diameter of the third abrasive element is smaller than the resting diameters of the first eccentric abrasive element and the second eccentric abrasive element,
wherein each of the first, second and third abrasive elements comprises a working diameter, wherein each of the working diameters are traced out during high-speed rotation of the rotational atherectomy system, and wherein the working diameter for the first abrasive element is greater than its resting diameter, and the working diameter for the second abrasive element is greater than its resting diameter.