US 12,076,547 B2
Expandable mechanical hemodynamic support systems, devices, and methods
Loïc Van Horne, Minneapolis, MN (US)
Assigned to Narwhal Medical LLC, Minneapolis, MN (US)
Filed by Narwhal Medical LLC, Minneapolis, MN (US)
Filed on Oct. 2, 2023, as Appl. No. 18/375,793.
Application 18/375,793 is a continuation of application No. 18/108,446, filed on Feb. 10, 2023, granted, now 11,839,753.
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 2024/0042191 A1, Feb. 8, 2024
Int. Cl. 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)
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)] 11 Claims
OG exemplary drawing
 
1. A method of deploying a percutaneous ventricular assist device in a patient, the method comprising:
percutaneously advancing a housing component of the percutaneous ventricular assist device to position a distal end portion of the housing component within a heart of the patient, wherein the housing component comprises:
a pump housing; and
an inlet cannula extending from the pump housing, wherein the pump housing and the inlet cannula are radially reconfigurable between: (i) low-profile configurations and (ii) radially expanded configurations;
an elongate drive shaft housing extending proximally from the pump housing or the inlet cannula, the elongate drive shaft defining a housing lumen;
a drive shaft housing hub located at a proximal end portion of the drive shaft housing; and
a drive shaft housing hub seal within the drive shaft housing hub,
wherein the inlet cannula is positioned in a left ventricle and the pump housing is positioned in an ascending aorta;
after positioning the inlet cannula in the left ventricle and the pump housing in the ascending aorta, inserting a rotatable inner catheter into the housing lumen through the drive shaft housing hub seal and slidably advancing the rotatable inner catheter along the housing lumen to position the rotatable inner catheter within the housing component, the rotatable inner catheter comprising:
an elongate flexible drive shaft defining an inflation lumen;
a drive shaft hub located at a proximal end portion of the drive shaft;
a drive shaft hub seal within the drive shaft hub; and
an impeller disposed at a distal end of the drive shaft,
wherein the impeller is positioned in the pump housing;
after positioning the impeller in the pump housing, coupling a motor to the drive shaft hub; and
while the drive shaft hub is coupled to the motor, inserting an inflation needle through the drive shaft hub seal and supplying an inflation fluid into the inflation lumen of the drive shaft to cause the impeller to transition to a pressurized and expanded configuration.