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AST to Platelet Ratio Index (APRI) is reported to be a simple, noninvasive, and readily available laboratory test index that can stratify patients with HCV and Non-Alcoholic Fatty Liver Disease (NAFLD) who are at high or low risk for significant fibrosis and cirrhosis with high degree of accuracy.
Clumping may cause false low count. Platelet satellitism around neutrophils will cause a pseudothrombocytopenia. RBC or WBC fragments including fragmented fragile leucemic cells and neutrophil pseudoplatelets may cause falsely elevated counts.
AST: kinetic; Platelet Count: automated cell counter
Serum and whole blood
0.5 mL (serum); fill tube to capacity (whole blood)
0.5 mL (serum), 0.5 mL (whole blood)
Gel-barrier tube or red-top tube and lavender-top (EDTA) tube
Separate serum from cells within 45 minutes of collection; invert EDTA tube immediately 8 to 10 times once tube is filled at the time of collection.
Causes for Rejection
Serum: gross hemolysis; improper labeling
Whole blood: hemolysis; clotted specimen; tube not filled with minimum volume; improper labeling; transfer tubes with whole blood; specimen diluted or contaminated with IV fluid; specimen received with plasma removed; specimen collected in any anticoagulant other than EDTA
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|385375||AST and Platelets with APRI||001123||AST (SGOT)||IU/L||1920-8|
|385375||AST and Platelets with APRI||015172||Platelets||x10E3/uL||777-3|
|385375||AST and Platelets with APRI||011579||APRI Index||86465-2|