US 12,424,315 B2
Ventricular assist device
Christoph Nix, Aachen (DE); Katrin Lunze, Aachen (DE); Thorsten Siess, Aachen (DE); and Walid Aboulhosn, Aachen (DE)
Assigned to Abiomed Europe GmbH, Aachen (DE)
Filed by Abiomed Europe GmbH, Aachen (DE)
Filed on Jun. 28, 2022, as Appl. No. 17/851,127.
Application 17/851,127 is a continuation of application No. 16/327,104, granted, now 11,413,444, previously published as PCT/EP2017/070953, filed on Aug. 18, 2017.
Claims priority of application No. 16185397 (EP), filed on Aug. 23, 2016.
Prior Publication US 2023/0048736 A1, Feb. 16, 2023
Int. Cl. A61M 60/122 (2021.01); A61M 60/135 (2021.01); A61M 60/148 (2021.01); A61M 60/178 (2021.01); A61M 60/205 (2021.01); A61M 60/216 (2021.01); A61M 60/414 (2021.01); A61M 60/422 (2021.01); A61M 60/50 (2021.01); A61M 60/562 (2021.01); A61M 60/569 (2021.01); A61M 60/816 (2021.01); A61M 60/857 (2021.01); G16H 40/63 (2018.01); G16H 50/30 (2018.01)
CPC G16H 40/63 (2018.01) [A61M 60/135 (2021.01); A61M 60/148 (2021.01); A61M 60/178 (2021.01); A61M 60/205 (2021.01); A61M 60/216 (2021.01); A61M 60/414 (2021.01); A61M 60/422 (2021.01); A61M 60/50 (2021.01); A61M 60/562 (2021.01); A61M 60/569 (2021.01); A61M 60/816 (2021.01); A61M 60/857 (2021.01); G16H 50/30 (2018.01); A61M 2205/3334 (2013.01); A61M 2205/3365 (2013.01); A61M 2205/50 (2013.01); A61M 2230/04 (2013.01); A61M 2230/30 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A control device for controlling a rotational speed (nVAD(t)) of a non-pulsatile ventricular assist device (VAD), by an event-based within-a-beat control strategy, wherein the control device is configured to:
alter the rotational speed (nVAD(t)) of the VAD within a cardiac cycle of an assisted heart;
derive at least one sequence of trigger signals (σ(t)) based on a signal representing an electrical current that is supplied to an actuator of the VAD, wherein the at least one sequence of trigger signals (σ(t)) is related to at least one predetermined characteristic event in the cardiac cycle, and
synchronize the alteration of the rotational speed (nVAD(t)) with a heartbeat by the at least one sequence of trigger signals (σ(t)),
wherein the control device is further configured to control the rotational speed (nVAD(t)) of the VAD such that, in a diastolic phase of the cardiac cycle of the assisted heart, an amount of blood ejected by the VAD into an artery of interest is such that a predetermined blood volume remains in a corresponding ventricle and co-ejection from the VAD and from the corresponding ventricle during systole results in a predetermined total peak blood flow (Qtotal|max(h)).