| 摘要 |
The invention relates to a method and a device for determining the concentration of a blood constituent in tubing, in particular tubing (5) of an extracorporal blood circuit (I) of an extracorporal blood treatment unit. The invention also relates to an extracorporal blood treatment device comprising a device (11) for determining the concentration of a blood constituent. The claimed method and the claimed device relate to the correction of the influence of the tubing on the determination of the concentration of the blood constituent. In order to determine the correction factor k, a reference measurement is carried out with a liquid other than blood, in order to be able to determine the correlation between the intensity of emitted electromagnetic radiation in tubing which is filled with blood containing the blood constituent in a defined concentration, and in tubing which is filled with a liquid other than blood. The correction factor is then determined on the basis of the previously determined correlation between the intensity of the emitted electromagnetic radiation in tubing filled with blood and in tubing filled with a liquid other than blood and on the basis of the previously measured intensity of the electromagnetic radiation which is emitted by the tubing filled with a liquid other than blood. |
