US 12,185,970 B2
Atherectomy devices and methods
Paul Joseph Robinson, Mahtomedi, MN (US); Cassandra Ann Piippo Svendsen, Blaine, 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 Oct. 13, 2023, as Appl. No. 18/379,733.
Application 15/707,690 is a division of application No. 14/155,549, filed on Jan. 15, 2014, granted, now 9,788,853, issued on Oct. 17, 2017.
Application 18/379,733 is a continuation of application No. 17/545,253, filed on Dec. 8, 2021, granted, now 11,819,237.
Application 17/545,253 is a continuation of application No. 16/685,832, filed on Nov. 15, 2019, granted, now 11,224,456, issued on Jan. 18, 2022.
Application 16/685,832 is a continuation of application No. 16/155,010, filed on Oct. 9, 2018, granted, now 10,478,217, issued on Nov. 19, 2019.
Application 16/155,010 is a continuation of application No. 16/151,531, filed on Oct. 4, 2018, granted, now 10,478,216, issued on Nov. 19, 2019.
Application 16/151,531 is a continuation of application No. 16/150,711, filed on Oct. 3, 2018, granted, now 10,499,946, issued on Dec. 10, 2019.
Application 16/150,711 is a continuation of application No. 16/150,003, filed on Oct. 2, 2018, granted, now 10,478,215, issued on Nov. 19, 2019.
Application 16/150,003 is a continuation of application No. 16/148,347, filed on Oct. 1, 2018, granted, now 10,470,794, issued on Nov. 12, 2019.
Application 16/148,347 is a continuation of application No. 16/142,583, filed on Sep. 26, 2018, granted, now 10,327,803, issued on Jun. 25, 2019.
Application 16/142,583 is a continuation of application No. 15/707,690, filed on Sep. 18, 2017, granted, now 10,368,901, issued on Aug. 6, 2019.
Prior Publication US 2024/0050121 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/3207 (2006.01); A61B 17/22 (2006.01); A61B 17/32 (2006.01); A61M 25/10 (2013.01)
CPC A61B 17/320758 (2013.01) [A61B 2017/22038 (2013.01); A61B 2017/22069 (2013.01); A61B 2017/320004 (2013.01); A61B 2017/320766 (2013.01); A61M 2025/1047 (2013.01); A61M 2025/1097 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A rotational atherectomy device, comprising:
an elongate tube advanceable into a blood vessel and configured to deliver a flush fluid toward a distal opening of the elongate tube;
a torque-transmitting coil rotatable within the elongate tube and extending distally from the distal opening of the elongate tube, wherein the torque-transmitting coil has a constant outer diameter of about 0.020 inches to about 0.100 inches and defines a central lumen configured to slidably receive a guidewire;
a distal metallic concentric element having a center of mass aligned with a longitudinal axis of the torque-transmitting coil and being fixedly mounted to the torque-transmitting coil; and
an array of at least three eccentric abrasive burrs having a spherical or ellipsoid shape with an abrasive outer surface and being fixedly mounted to the torque-transmitting coil at a position spaced proximal from the distal metallic concentric element such that a center of mass of each of the at least three eccentric abrasive burrs is offset from the longitudinal axis while contemporaneously the center of mass of the distal metallic concentric element is aligned with the longitudinal axis,
wherein the array of at least three spherical or ellipsoidal eccentric abrasive burrs comprises at least: a middle abrasive burr having the spherical or ellipsoid shape, a proximal-most abrasive burr having the spherical or ellipsoid shape, and a distal-most abrasive burr having the spherical or ellipsoid shape, wherein the middle abrasive burr in the array has a maximum outer diameter that is greater than both a maximum outer diameter of the proximal-most abrasive burr in the array and a maximum outer diameter of the distal-most abrasive burr in the array.