Test Code LAB4543 Heparin Anti-XA, Plasma

Specimen Requirements

Container/Tube:
Required: Citrate (Blue Top) Specimen Volume: Full

Stability:

Temperature	Time
Room Temp 18-28°C	2 hours
Frozen <-18°C	1 month

Additional Instructions

Draw Times:
LMWH: Pharmacy recommended draw time is 4-6 hrs after dose.
This includes Fragmin , Lovenox ,and Enoxaparin.
24 hr dose can be drawn just prior to dose.

UFH : 6hrs after dose or 6 hrs after any dose change.
After therapeutic, every 24 hrs.

3.2% NA Citrate. Critical fill tube (fill to line on label).
Keep stoppered.
Test must be ran within 2 hours or plasma must be removed and frozen.

Therapeutic Range

Unfractionated Heparin: 0.3 – 0.7 IU/mL

Low Molecular Weight Heparin: Enoxaparin:

Anti-coag bridging (mechanical valves):
Peak: 0.5-1.0 units/ml

Anticoag bridging (mechanical valves) in pregnant patients:
Peak: 0.8-1.2 units/ml
Trough: ≥0.6 units/ml

VTE treatment (Peaks):
(Q12H): 0.6-1.0 units/ml
(Q24H): 1.0-2.0 units/ml

VTE prophylaxis in pregnant women:
Peak (Q12H): 0.2-0.6 units/ml

Department

Coagulation

Synonyms