An automatic hematocrit reader wherein a sample of blood in a microhematocrit capillary tube is banded with a standing wave from an ultrasonic transducer. A light source and photocell combination is used to determine the relative thicknesses of the bands of red blood cells and the bands of plasma. The hematocrit of the sample of blood is electronically calculated from this data. A calibration strip is included so that the device is calibrated each time the hematocrit is determined. The device includes a mechanical interlock/eject system for the microhematocrit capillary tube and is specifically configured so that the operator does not handle or even touch the microhematocrit capillary tube.
申请公布号
US5139328(A)
申请公布日期
1992.08.18
申请号
US19910670691
申请日期
1991.03.18
申请人
SEPARATION TECHNOLOGY, INC.
发明人
BAKER, CHARLES D.;BRIMHALL, OWEN D.;MCLAUGHLIN, THOMAS J.