COVID-19 information for patients and families

To help protect our people, patients and communities, we are screening everyone who enters our main hospital buildings. Some of our entrances may be closed or have reduced access.

Please check our COVID-19 information page for more updates before coming to our sites.


Text size: a a a

Laboratory Medicine

Test catalogue

Low Molecular Weight Heparin (LMWH)

Test Name

Low Molecular Weight Heparin (LMWH, Lovenox, Tinzaparin, Fragmin, Enoxaparin or Dalteparin)

Blue Tube Specimen Type / Requirements

Container Type = Blue

Minimum Volume = 9:1 Ratio – Full Draw

Specimen handling

Collection Instructions: Collect blood into blue top vacutainers which contain 3.2% buffered sodium citrate. NOTE: The ratio of blood to anticoagulant is 9 parts blood to 1 part anticoagulant, therefore the blue top vacutainer (citrate) must be filled AT LEAST ¾ in total volume. Must specify Heparin therapy. Haematology consult not required.

Write your initials, date and time of collection on the collection label.

Stability: Stable frozen at -20C for up to two weeks or -70C for up to six months

Transportation: Send sample to core lab as soon as posible. Specimens that cannot be tested within the suitable timeframe (within 2hrs of Collection_) are to be double-spun and send frozen

Laboratory Staff Instructions: Centrifuge the blood sample at 4000 RPM (1500 G) for 8 minutes at room temperature (18-24˚C). Transfer the plasma fraction into a clean 10.0 mL plastic, conical tube. Re-centrifuge the plasma at 1500g for 5 minutes at room temperature (18 - 24˚C). Seperate and store plasma frozen at -70˚C, if testing cannot be performed within 2 hours

Sample Rejection Criteria: Clotted sample, Grossly hemolyzed samples, Unlabeled or Not Sufficient Quantity Samples will be rejected

Required Documentation

Regular HIS order or Haematology requisition required.

Turnaround Time (TAT)

STAT:45min Routine:4hrs

Test Utilization

Once per week

Reference Value

Low Molecular Weight Heparin: 0.60 - 1.10 U/mL (twice/day injection)

Low Molecular Weight Heparin: 1.00 - 2.00 U/mL (once/day injection)

Test Code

LMWH

Methodology

Chromogenic Assay

Testing Location

SMH-Special Coagulation

Other information