Sodium citrate
As with all coagulation tests the tubes must not be underfilled – fill to the line on the tube.
Haemolysis should be avoided by:
Delay in sample analysis – Samples should be tested the same day
Non anticoagulated Adult 0.87 – 1.13
For unfractionated heparin therapy 1.5 – 2.5
The result is given as a ratio of the patient test time/ mean normal control time
APTR is not suitable for monitoring low molecular weight heparin. See Heparin Assay
Diagnosis of coagulopathy/Unfractionated Heparin monitoring/Detection of Lupus anticoagulants
In house
yes
1 hr – STAT samples
4 hr – routine samples
Clinical advice is available from the Haematology Medical team (contact RD&E switchboard on 01392 411611)
Specimen Labelling Procedure
8210
