Method for determining a volume flow in a blood treatment apparatus, calculating device and blood treatment apparatus

摘要

The present invention relates to a method for determining at least a first volume flow in a blood treatment apparatus which comprises: a primary circuit for conducting the blood to be treated; a secondary circuit for conducting a fluid that is used for the blood treatment; a blood treatment module provided for exchanging fluids and/or substances between the primary circuit and the secondary circuit; and an optionally provided fluid connection between the primary circuit and the secondary circuit, provided for introducing the first volume flow from the secondary circuit into the primary circuit; wherein the method encompasses determining the first volume flow of the secondary circuit taking into account a first pressure value or pressure measurement and a second pressure value or pressure measurement in the secondary circuit. The present invention further relates to a calculating device and a blood treatment apparatus.

主权项

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.