Specimen

Plasma

Collection Medium:

Alternate
Collection Media:

Call laboratory for additional acceptable specimen collection 
containers.

Minimum:

2 ml whole blood from light gr een top tube or 1 light green microtube 
for pediatric patients

Testing Schedule:

24 hrs/day, 7 days a week, including holidays.

Analytic Time:

1 hour (upon receipt in laboratory)

Reference Range:

<0.5 mg/dl

Test
Limitations:

Criterion: Recovery within plus or minus 10% of initial values.

Icterus: No significant interference up to an I index of 60 
(approximate conjugated and unconjugated bilirubin concentration: 60 
mg/dl or 1026 umol/l).

Hemolysis: No significant interference up to an H index of 700. 
(approximate hemoglobin concentration: 700 mg/dl or 435 umol/l )

Lipemia (Intralipid): No significant interference up to an L index of 
1000 (approximate triglyceride concentration: 2000 mg/dl or 22.8 
mmol/l).
There is poor correlation between turbidity and triglyceride 
concentration.

Rheumatoid factors less than 1200 IU/ml do not interfere.

A high-dose hook effect may occur at CRP concentrations greater than 50 
mg/dl.

Methodology:

Immunoturbidometric

CPT Code:

86140