Method for determining concentration of hemoglobin in blood-filled transparent hose line of extracorporeal blood circuit, involves determining concentration based on correction factor corresponding to measurement of transmission

摘要

The method involves determining passage length of electromagnetic radiation based on measurement of scattering or transmission of the radiation in blood, after filling a transparent hose line e.g. venous blood line (6), with a liquid e.g. dialyzer liquid. Electromagnetic radiation of a preset wavelength is coupled with an LED in the hose line during the measurement. Intensity of the radiation passing via the hose line or the liquid is measured using a light detector. Concentration of blood components in blood is determined based on a correction factor corresponding to the measurement. An independent claim is also included for a device for determining concentration of a specific blood component in a blood-filled transparent hose line of an extracorporeal blood circuit of an extracorporeal blood treatment device.