APTT ratio - therapeutic heparin ratio

Alternative names, keywords

Samples required

● Trisodium citrate blood (blue cap, 3.5 mL tube) taken with minimal stasis, filled to the line. Smaller tubes are available for paediatric samples.

Samples must be analysed or processed in the laboratory within 4 hours of venepuncture.

Test indications

Reference range

2.0 – 2.5

_{Source: locally determined.}

Turnaround time

1 working day

Enquiries

Haematology (Coagulation)