AST-Platelet Ratio Index (APRI)
 (Biochemistry)
Investigation : AST-Platelet Ratio Index (APRI)
Specimen type : See Below
Spec container : Null 
Turnaround : <24 hours


The sample type required is Serum (Serum Gel 4.7ml) and EDTA (EDTA KE 2.7ml).


APRI =
100 (measured AST/Upper limit of normal for AST)
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Platelet Count (x10 9/L)

APRI calculation updated 01/05/21 as per AST reference interval.
Female APRI values are approximately 40% higher than previously.
Male APRI values are approximately 13% higher than previously.

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