Population
Three freeze-dried candidate plasmas tested across 20 laboratories
Comparison
Calibration using six thromboplastin reagents vs Comparison between different thromboplastin…
Design
Other
Authors
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INR differences by thromboplastin warrant monitoring caution; challenges single assigned values and leaves open reagent-specific calibration.
Significant differences in INR estimates from different thromboplastins suggest that single assigned INR values may not be applicable for use with all reagents, highlighting the need for field trials.
Hubbard et al. (1999) studied this question.
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