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Test Code Low Molecular Weight Heparin LMWH

Additional Codes

LAB316

Special Collection Instructions

Properly filled 9:1 ratio (blood to anticoagulant); 3.2% NaCitrate tube

Collection Method

Venous Draw; properly filled 9:1 ratio (blood to anticoagulant)

Minimum Volume

0.5 ml of plasma from a properly filled 1.8 mL or 2.7 mL NaCitrate (light blue) tube

Container

Light Blue Sodium Citrate

Preferred Specimen

2.7mL Lt. Blue (3.2% NaCitrate)

Acceptable Specimens

1.8 mL Lt. Blue (3.2% NaCitrate) tube

Reference or Target Ranges

LMWH: 0.50 – 2.00 IU/mL

LMWH once daily: 0.50 – 1.00 IU/mL

LMWH twice daily: 1.00 – 2.00 IU/mL 

Reportable Units

IU/mL

Critical Value

LMWH:  >2.0 IU/mL

Reasons for Rejection

Hemolysis Threshold If visible – reject
Icterus Threshold If visible – reject
Lipemia Threshold If visible – reject
Interfering Subtances/Other Short draws, over draws, clotted, improperly labeled, hemolyzed, lipemic or icteric samples, samples > 4 hours from collection

Specimen Stability

Ambient 2 hrs unopened specimen
Refrigerated (4°C to 8°C) N/A
Frozen(-70°C)  6 months for separated plasma

Performance Information

Days and Time Performed 24/7
Expected Turn Around Time Stat:1 hour on arrival to lab
Routine:4 hours on arrival to lab
Stat Availability Yes
Performing Bench Coagulation
Methodology/Method Description UH: Stago MAX

CPT Codes

85520

Last review/edit date

Nov 2024