US 11,812,988 B2
Atherectomy devices and methods
Michael Kallok, St. Paul, MN (US); Cassandra Ann Piippo Svendsen, Blaine, MN (US); Paul Joseph Robinson, Mahtomedi, MN (US); Charles Anthony Plowe, Blaine, MN (US); and Albert Selden Benjamin, St. Paul, MN (US)
Assigned to Cardio Flow, Inc., St. Paul, MN (US)
Filed by Cardio Flow, Inc., St. Paul, MN (US)
Filed on Jan. 14, 2022, as Appl. No. 17/576,278.
Application 17/576,278 is a continuation of application No. 16/733,514, filed on Jan. 3, 2020, granted, now 11,253,290.
Application 16/733,514 is a continuation of application No. 16/196,894, filed on Nov. 20, 2018, granted, now 10,524,826, issued on Jan. 7, 2020.
Application 16/196,894 is a continuation of application No. 16/008,136, filed on Jun. 14, 2018, granted, now 11,147,582, issued on Oct. 19, 2021.
Prior Publication US 2022/0133345 A1, May 5, 2022
Int. Cl. A61B 17/3207 (2006.01); A61B 17/32 (2006.01)
CPC A61B 17/320725 (2013.01) [A61B 17/320758 (2013.01); A61B 2017/320008 (2013.01); A61B 2017/320716 (2013.01); A61B 2017/320733 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of rotationally abrading a material along an interior of an arteriovenous graft, the system comprising:
simultaneously rotating an array of eccentric abrasive burrs within an interior of a synthetic arteriovenous graft at a rotational speed of 20,000 to 160,000 rpms so that at least one eccentric abrasive burr in the array travels in an orbital path having an orbit diameter multiple times greater than an outer maximum diameter of said at least one eccentric abrasive burr, the array of eccentric abrasive burrs being fixedly mounted to a torque-transmitting coil that defines a longitudinal axis extending in a longitudinal direction; and
during said simultaneously rotating the array of eccentric abrasive burrs within the interior of the synthetic arteriovenous graft, reciprocating the array of eccentric abrasive burrs back and forth in the longitudinal direction within the interior of the synthetic arteriovenous graft;
wherein during said simultaneously rotating the array of eccentric abrasive burrs within an interior of the synthetic arteriovenous graft, simultaneously rotating a distal concentric metallic element along with the array of eccentric abrasive burrs within an interior of the synthetic arteriovenous graft, the distal concentric metallic element having an abrasive outer coating and being fixedly mounted to the torque-transmitting coil at a position distally of the array of eccentric abrasive burrs so that the distal concentric metallic element has a center of mass aligned with the longitudinal axis.