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Worcestershire Acute Hospitals NHS Trust
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Test
Anti-Xa Assay
CategoryHaematology
Code
XA
Test information
Must be separated within 4 hours of collection 
 
PLEASE NOTE: THIS TEST IS NOT CURRENTLY ACCREDITED UNDER ISO 15189
Reference range
Prophylactic range 0.2-0.6 iu/ml 
Therapeutic range 0.6-1.0 iu/ml
Special requirements
Specimen should be collected 3-4hrs post dosage of Clexane and tested within 2hrs of collection
Tube type
2.7 ml Blue top citrate
Minimum volume
1 tube minimum 90% full - essential to ensure 1:9 ratio of anticoagulant : blood
TAT Inpatient
72 hours
TAT GP/Outpatient
72 hours
Referral lab
local
Page last updated: 11 January 2022