Method for controlling an assist pump for fluid delivery systems with pulsatile pressure

US7150711B2 · kind B2 · utility

Assignee

• Berlin Heart GmbH · DE

Inventors

• Peter Nüsser · Kleinmachnow, DE
• Johannes Müller · Uetze, DE
• Frank Deus · Berlin, DE
• Peter Göttel · Berlin, DE
• Jan Hoffmann · Rosbach, DE
• Kurt Graichen · Berlin, DE
• Andreas Arndt · Dalbke, DE
• Tobias Merkel · Kleinmachnow, DE

Key dates

• Filing date: Apr 26, 2002
• Grant date: Dec 19, 2006
• Expiry date: Apr 26, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04D15/0066
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Method for controlling an assist pump for fluid delivery systems with pulsatile pressure. If for example a heart assist pump is driven with a constant number of revolutions, it is achieved, that the blood is also delivered through the assist pump, even when the heart chamber is in the decontraction phase. With the present method it is achieved, that an assist pump only acts supportingly in the pressure phase of the main pump, in such a way, that the pressure difference between the input side and the output side of the assist pump is continuously determined and the number of revolutions of the assist pump is controlled in such a way, that the determined pressure difference does not fall below a predetermined value and the rate of flow does not sink below zero.