US 12,138,440 B2
Managing pump speed when power constrained in a fully implanted LVAD system
Eric A. Schilling, Ham Lake, MN (US); Joel B. Artmann, Elk River, MN (US); Jason C. Lee, Edina, MN (US); and David I. Siegfried, Edina, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Jun. 30, 2021, as Appl. No. 17/363,065.
Claims priority of provisional application 63/059,333, filed on Jul. 31, 2020.
Prior Publication US 2022/0032038 A1, Feb. 3, 2022
Int. Cl. A61M 60/873 (2021.01); A61M 60/178 (2021.01); A61M 60/546 (2021.01); A61M 60/592 (2021.01); A61M 60/876 (2021.01)
CPC A61M 60/873 (2021.01) [A61M 60/178 (2021.01); A61M 60/546 (2021.01); A61M 60/592 (2021.01); A61M 60/876 (2021.01); A61M 2205/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of managing a speed of implantable blood pump, the implantable blood pump being in communication with an internal battery and a transcutaneous energy transfer system (TETS), the method comprising:
starting the pump at a programmed set speed;
decreasing the speed of the pump from the programmed set speed to a minimum set speed if either a capacity of the internal battery is less than a predetermined reserve level and TETS power is unavailable, or there is insufficient TETS power to maintain the programmed set speed;
progressively decreasing the speed of the pump from the minimum set speed to maintain a speed below the minimum set speed that is supported by available power if there is insufficient power to maintain the minimum set speed; and
stopping the pump if the speed below the minimum set speed is less than a critical cutoff speed.