METHOD AND APPARATUS FOR MEASURING HEMATOCRIT IN WHOLE BLOOD

摘要

PURPOSE: To accurately find the hematocrit value of whole blood at the time of finding hematocrit from the conductivity of the whole blood and blood plasma. CONSTITUTION: A flow passage 20 is provided in a casing 12 housing a sodium ion selective electrode 14, a potassium ion selective electrode 16, and a conductivity cell 18 and a blood sample is made to flow through the passage 20. The electrodes 14 and 16 and cell 18 are connected to a computer 30. The sodium or potassium ion concentration of the blood sample is calculated from the signal of the electrode 14 or 16. Then the conductivity of the blood plasma of the sample is found based on the sodium or potassium ion concentration and the hematocrit value of the sample is found by taking the conductivity of the whole blood of the sample into consideration.