US 11,653,841 B2
MAP estimation on VAD patients
Carlos Reyes, Davie, FL (US); and Fernando Casas, Miami Lakes, FL (US)
Assigned to HeartWare, Inc., Miami Lakes, FL (US)
Filed by HeartWare, Inc., Miami Lakes, FL (US)
Filed on Sep. 17, 2019, as Appl. No. 16/573,011.
Claims priority of provisional application 62/737,244, filed on Sep. 27, 2018.
Prior Publication US 2020/0101209 A1, Apr. 2, 2020
Int. Cl. A61B 5/021 (2006.01); A61B 5/00 (2006.01); A61M 60/178 (2021.01); A61M 60/411 (2021.01); A61M 60/232 (2021.01); A61M 60/538 (2021.01); A61M 60/523 (2021.01); A61M 60/531 (2021.01); A61M 60/585 (2021.01)
CPC A61B 5/02108 (2013.01) [A61B 5/746 (2013.01); A61M 60/178 (2021.01); A61M 60/232 (2021.01); A61M 60/411 (2021.01); A61M 60/523 (2021.01); A61M 60/531 (2021.01); A61M 60/538 (2021.01); A61M 60/585 (2021.01); A61M 2205/04 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3334 (2013.01)] 20 Claims
OG exemplary drawing
 
5. A system comprising:
an implantable blood pump including an impeller; and
a controller coupled to the blood pump and including a control circuit configured to:
determine a graft hydraulic resistance value during a systolic phase of a cardiac cycle of a patient based on a pump speed, a pump flow value, and a pump loss constant value of a blood pump;
calculate the mean arterial pressure index during a diastolic phase of the cardiac cycle based on the graft hydraulic resistance value; and
perform a pump parameter adjustment related to the implantable blood pump in response to the mean arterial pressure index deviating from a mean arterial pressure index range.