US 12,303,679 B2
Expandable mechanical hemodynamic support systems, devices, and methods
Loïc Van Horne, Minneapolis, MN (US)
Assigned to Narwhal Medical, Inc., Minneapolis, MN (US)
Filed by Narwhal Medical, Inc., Minneapolis, MN (US)
Filed on Jul. 18, 2024, as Appl. No. 18/777,206.
Application 18/777,206 is a continuation of application No. 18/108,409, filed on Feb. 10, 2023, granted, now 12,090,313.
Claims priority of provisional application 63/414,581, filed on Oct. 10, 2022.
Claims priority of provisional application 63/309,829, filed on Feb. 14, 2022.
Prior Publication US 2024/0374888 A1, Nov. 14, 2024
Int. Cl. A61M 60/17 (2021.01); A61M 60/13 (2021.01); A61M 60/174 (2021.01); A61M 60/178 (2021.01); A61M 60/216 (2021.01); A61M 60/226 (2021.01); A61M 60/414 (2021.01); A61M 60/416 (2021.01); A61M 60/538 (2021.01); A61M 60/585 (2021.01); A61M 60/808 (2021.01); A61M 60/81 (2021.01); A61M 60/824 (2021.01); A61M 60/841 (2021.01)
CPC A61M 60/178 (2021.01) [A61M 60/13 (2021.01); A61M 60/174 (2021.01); A61M 60/216 (2021.01); A61M 60/226 (2021.01); A61M 60/414 (2021.01); A61M 60/416 (2021.01); A61M 60/538 (2021.01); A61M 60/585 (2021.01); A61M 60/808 (2021.01); A61M 60/81 (2021.01); A61M 60/824 (2021.01); A61M 60/841 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A percutaneous ventricular assist device comprising:
an elongate flexible drive shaft defining a lumen;
an inflatable balloon-based pump impeller attached to a distal end portion of the drive shaft, the pump impeller comprising:
a body with an outer surface, wherein the body is expandable in response to receiving an inflation fluid supplied via the lumen; and
one or more ridges attached to the body of the pump impeller and disposed around the outer surface of the body, wherein each ridge comprises a tube that defines its own separate internal tubular lumen extending along the ridge, and wherein each ridge is expandable in response to receiving the inflation fluid into its own separate internal tubular lumen; and
a pump housing,
wherein the percutaneous ventricular assist device is configured to pump blood when: (i) the pump impeller is positioned in the pump housing, (ii) the pump impeller is expanded, and (iii) the drive shaft is rotated.