Patent ID: 9295770
Filing Date: 2016-03-29
CPC Classification: A61M

Claim Text:
1. A system for determining at least one volume flow in ablood treatment apparatus, said system comprising: a primary circuit configured to conduct a blood to be treated; a secondary circuit configured to conduct a fluid that is used for a blood treatment of the blood to be treated; a blood treatment module provided as a section of at least one of the primary circuit or the secondary circuit, said blood treatment module configured to at least one of exchange fluids or substances between the primary circuit and the secondary circuit; at least one measuring device; and a calculating device configured to determine a first volume flow of the secondary circuit as a function of a flow resistance, a second volume flow, and a difference between a second pressure value and a first pressure value, wherein a tube line or connecting line is provided between the primary circuit and the secondary circuit, said tube line or connecting line configured to remove the first volume flow from the second volume flow in the secondary circuit, and introduce said first volume flow into the primary circuit, wherein the first volume flow is a partial volume flow of the second volume flow and wherein the at least one measuring device is configured to measure the first pressure value at a first measurement location in the secondary circuit and the second pressure value at a second measurement location in the secondary circuit.