(2) The 3.8% sodium citrated plasma appears to alter the International Sensitivity Index (ISI) of some thromboplastin times (3-5) but is still the preferred material for special platelet function tests.
Intraassay imprecision (CV) was determined by measuring samples from 4 different citrated plasma pools 21 times in one run, and interassay imprecision (CV) was evaluated from the analysis of one sample from each plasma pool at 6 days.