Method and device for determining the pressure or volumetric flow of medical fluids

摘要

A method for determining a pressure of a medical fluid in a fluid line by using at least one centrifugal pump includes detecting the pressure upstream of the centrifugal pump while considering an information about a pressure downstream of the centrifugal pump, or detecting the pressure downstream of the centrifugal pump while considering an information about a pressure upstream of the centrifugal pump. Thereby, at least one information about the volume flow in the fluid line and/or at least one information about a rotation speed of the centrifugal pump are considered, respectively. The invention also relates to a method for determining a volume flow, an arithmetic unit, a treatment apparatus, a digital storage means, a computer program product and a computer program.

主权项

1. A method for determining a pressure of a medical fluid in a fluid line in a closed circuit by using at least one centrifugal pump and only one pressure sensor, the method comprising:
measuring a pressure upstream or downstream of the centrifugal pump by the only one pressure sensor at one rotation speed; and determining a pressure downstream of the centrifugal pump based on the measured pressure upstream of the centrifugal pump, a predetermined volume flow in the fluid line, and the one rotation speed of the centrifugal pump, or determining a pressure upstream of the centrifugal pump based on the measured pressure downstream of the centrifugal pump, a predetermined volume flow in the fluid line, and the one rotation speed of the centrifugal pump.