Specimen Stability (for laboratory use only)
Collection Container
Light green top (lithium heparin, PST)
Service Code:
LBC05648
Collection Instructions:
For trough level, take blood specimen just before the next dose.
1. Draw sufficient blood into light green top tube.
2. Gently invert the tube 8-10 times.
3. Send specimen to the laboratory immediately.
1. Draw sufficient blood into light green top tube.
2. Gently invert the tube 8-10 times.
3. Send specimen to the laboratory immediately.
Unacceptable Conditions:
Clotted
Grossly haemolysed
Grossly icteric
Grossly lipaemic
Grossly haemolysed
Grossly icteric
Grossly lipaemic
Specimen Stability:
Ambient
Not Centrifuged: 2 hours
Refrigerate
Frozen
Reflex Tests:
N.A.
Performance
Turn Around Time:
Stat: 2 hours. Routine: 4 hours.
Days Test Performed:
Testing Laboratory:
Woodlands Hospital Laboratory Medicine and Pathology, Biochemistry (Go Live 03/06/2025)
Clinical & Interpretative
Description:
Methodology:
Enzymatic multiplied immunoassay technique (EMIT)
Reference Interval:
Trough: 0 – 1 mg/L
Critical Values:
>12 mg/L
