Dynamic control of subordinate pumps in a heart-lung-machine
AssigneeLivaNova Deutschland GmbH
InventorsOttmar Penka, Friedemann Schubert
Life of this patent
Estimating the term…
Abstract
Methods and systems for controlling one or more pumps of a heart-lung-machine. An illustrative method may comprise receiving an actual flow rate of a pump, determining the actual flow rate is from a primary pump, determining an available amount of the actual flow rate of the primary pump that is available to one or more subordinate pumps, comparing the available amount of the actual flow rate of the primary pump to a sum of set flow rates of the one or more subordinate pumps, and operating the one or more subordinate pumps in a proactive control mode or a reactive control mode.
Claims5
A method of controlling one or more subordinate pumps of a heart lung machine dynamically using one or more controllers, the method comprising:
- receiving, at the one or more controllers, a primary pump flow rate value corresponding to an actual flow rate outputted by a primary pump of the heart lung machine;
- determining, by the one or more controllers, a determined available amount of the actual flow rate outputted by the primary pump available to the one or more subordinate pumps;
- comparing, using the one or more controllers, the determined amount to a sum of set flow rates of the one or more subordinate pumps;
- and
- operating the one or more subordinate pumps dynamically using the one or more controllers a reactive control mode based on the comparing wherein the operating is in a reactive control mode when the sum of set flow rates is greater than the determined available amount and the reactive control mode comprises determining an incremental speed adjustment for at least one subordinate pump and reducing a flow rate of the at least one subordinate pump by applying the incremental speed adjustment;
- and
- wherein the operating is in a proactive control mode when the sum of set flow rates is less than the determined available amount and the proactive control mode comprises limiting a manual increase of a flow rate of at least one subordinate pump to a predetermined maximum flow rate value.
Dependencies are inferred from the claim text.