US 12,226,119 B2
Atherectomy devices and methods
Albert Selden Benjamin, St Paul, MN (US); Cassandra Ann Piippo Svendsen, Blaine, MN (US); Charles Anthony Plowe, Blaine, MN (US); and Paul Joseph Robinson, Mahtomedi, MN (US)
Assigned to Cardio Flow, Inc., St. Paul, MN (US)
Filed by Cardio Flow, Inc., St. Paul, MN (US)
Filed on Feb. 6, 2024, as Appl. No. 18/433,952.
Application 18/433,952 is a continuation of application No. 17/710,111, filed on Mar. 31, 2022, granted, now 11,931,064.
Application 17/710,111 is a continuation of application No. 16/727,518, filed on Dec. 26, 2019, granted, now 11,317,941, issued on May 3, 2022.
Application 16/727,518 is a continuation of application No. 16/192,431, filed on Nov. 15, 2018, granted, now 10,517,634, issued on Dec. 31, 2019.
Application 16/192,431 is a continuation of application No. 16/168,087, filed on Oct. 23, 2018, granted, now 10,335,187, issued on Jul. 2, 2019.
Application 16/168,087 is a continuation of application No. 15/440,402, filed on Feb. 23, 2017, granted, now 10,441,312, issued on Oct. 15, 2019.
Prior Publication US 2024/0260989 A1, Aug. 8, 2024
Int. Cl. A61B 17/3207 (2006.01); A61B 17/00 (2006.01); A61B 17/32 (2006.01)
CPC A61B 17/320758 (2013.01) [A61B 17/320725 (2013.01); A61B 2017/00199 (2013.01); A61B 2017/00778 (2013.01); A61B 2017/320004 (2013.01); A61B 2017/320766 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the method comprising:
delivering a rotational atherectomy device into the blood vessel, wherein the rotational atherectomy device comprises:
an actuator handle assembly comprising a housing and a carriage assembly that is movably coupled to the housing;
an elongate flexible drive shaft comprising a torque-transmitting coil, the drive shaft defining a longitudinal axis and a central drive shaft lumen extending along the longitudinal axis, the drive shaft rotatably coupled to the carriage assembly;
a set of eccentric abrasive elements fixed to a distal portion of the drive shaft and including at least a first, second, and third eccentric abrasive elements fixed to the drive shaft such that a center of mass of each eccentric abrasive element is offset from the longitudinal axis, the center of mass of the first eccentric abrasive element being offset from the longitudinal axis at a first radial angle, the center of mass of the second eccentric abrasive element being offset from the longitudinal axis at a second radial angle that differs from the first radial angle, the center of mass of the third eccentric abrasive element being offset from the longitudinal axis at a third radial angle that differs from the first radial angle and the second radial angle;
a sheath extending distally from a distal end of the actuator handle assembly and configured to receive a supply of flush fluid, the drive shaft being slidably disposed within a lumen defined by the sheath;
an electric motor coupled to the carriage assembly and configured to drive rotation of the drive shaft; and
a guidewire detention clamp positioned adjacent to a guidewire access port at a proximal end of the actuator handle assembly opposite from the sheath extending distally from the distal end of the actuator handle assembly and coaxial with the drive shaft;
moving the carriage assembly in relation to the housing to correspondingly move the drive shaft in relation to the housing; and
activating the electric motor for driving rotation of the drive shaft at a rotational speed of 20,000-160,000 rpm to urge the set of eccentric abrasive elements to revolve in an orbital path.