A low cost portable instrument for measurement of hematological parameters

Abstract

An electronic instrument bitscd on optical transmission toFor coagulation time, frcsh blood samples are collected from subjects by vcncpuncture. The chamber was filled upto a hcight of 17mm. The variation in the TI was directly used for measure' thc hcm:itologic:il p:ir:imcterscoagulntioii time, nicasnrcmcnt of coagulation time and the results ucre hcmatocrit and erythrocyte packing indcs of hc:rlthy and diseased sampler is dcvcloped.For hematocrit meiisurenient, thc instrument is calibrated by blood silnlplcs of different hematocrits, as measured by Wintrohe method. The coagulation time and hematocrit as measured by the TI variation show good agreement with that measured by capillary mcthod and Wintrobe technique, respectively. The erythrocyte packing index provides valuilble data on aggrcgation process of erythrocytes.