US 12,213,698 B2
Systems, methods and devices for removal of thrombus and/or soft plaque with asymmetric mass distribution within working region of impeller
Joseph P. Higgins, Minnetonka, MN (US); Nicholas W. Rydberg, Stillwater, MN (US); Matthew D. Cambronne, North Oaks, MN (US); and Jeffrey R. Stone, Minnetonka, MN (US)
Assigned to Cardiovascular Systems, Inc., St. Paul, MN (US)
Filed by Cardiovascular Systems, Inc., St. Paul, MN (US)
Filed on Nov. 29, 2022, as Appl. No. 18/070,753.
Application 18/070,753 is a division of application No. 17/407,468, filed on Aug. 20, 2021, granted, now 11,523,841.
Claims priority of provisional application 63/073,969, filed on Sep. 3, 2020.
Prior Publication US 2023/0093602 A1, Mar. 23, 2023
Int. Cl. A61B 17/3207 (2006.01)
CPC A61B 17/320758 (2013.01) [A61B 2017/320766 (2013.01); A61B 2017/320775 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A thrombus disruption and removal system, comprising:
a drive shaft defining a proximal end and a distal end and an axis of rotation;
a working region defined near, or at, the distal end of the drive shaft, the working region comprising:
an impeller hub defining a wall and attached to and/or surrounding the drive shaft;
a plurality of impeller blades attached to, or integrated with, the impeller hub and extending radially therefrom, at least one impeller blade being helical;
at least a portion of the drive shaft engaging the impeller hub and extending at least partially through a lumen defined through the impeller hub;
a prime mover coupled to the proximal end of the drive shaft and, together with the drive shaft, configured to rotate the impeller hub and to translate the working region,
wherein at least one of the impeller blades comprises a surface area that is greater than the surface area of any one of the remaining impeller blades in the plurality of impeller blades.