Method for calibrating a pressure sensor or a flow sensor at a rotary pump

US7010954B2 · kind B2 · utility

Assignee

• Impella CardioSystems AG · DE

Inventors

• Thorsten Siess · Aachen, DE
• Christoph Nix · Aachen, DE
• Stefan Boensch · Aachen, DE

Key dates

• Filing date: Nov 16, 2001
• Grant date: Mar 14, 2006
• Expiry date: Feb 15, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2230/30
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An intracardiac rotary pump (10) is provided with a pressure differential sensor (18) for supporting the pumping heart. The pressure differential sensor measures the pressure differential between aorta (AO) and left ventricle (LV). This pressure differential must correspond to certain desired values at different speed stages. If the pressure differential deviates to too large an extent, the deviation is recognized as a drift of the pressure sensor, and a correction value is determined in dependence on the drift, the subsequently measured pressure values being corrected with the aid of this correction value. In this manner it is possible to carry out a drift correction on the sensor with the pump arranged in the heart and even with the pump in operation.