Hematocrit measuring instrument.

摘要

A hematocrit measuring instrument for measuring a value of the hematocrit based on impedances of blood includes a low-frequency impedance measuring device (20) for measuring a low-frequency impedance of the blood and a high-frequency impedance measuring device (30) for measuring a high-frequency impedance of the blood. The hematocrit value is calculated based on the measured low and high-frequency impedances of the blood. Low and high-frequency measuring electrode pairs (26a/26b and 28a/28b) are disposed substantially at the same position in the blood flow direction in the blood flow passage (10) thereby enabling the hematocrit measuring instrument to measure the hematocrit value without being influenced due to temperature variations of the blood.