Specimen

Plasma

Collection Medium:

Alternate
Collection Media:

Call laboratory for additional acceptable specimen collection 
containers.

Minimum:

2 mL whole blood from light green top tube or 1 light green microtube 
for pediatric patients

Specimen
Instructions:

Protect micro-specimens from unnecessary exposure to light.

Testing Schedule:

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

Analytic Time:

1 hour (upon receipt in laboratory)

Reference Range:

0.2-1.0 mg/dl

Critical value:  >10.0 mg/dl for first 24 hrs
                 >13.0 mg/dl for 1-30 days

Refer to: 
Bilirubin Nomogram for designation of risk for newborns.

Test
Limitations:

Criterion: recovery plus or minus 0.4 mg/dl (6.8 umol/l) or 10% 
(whichever is greater) of initial values.

Plasma
Hemolysis: No significant interference up to an H index of 1000 
(approximate hemoglobin concentration: 1000 mg/dl).

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

Indican: No significant interference from indican up to levels of
10 mg/dl.

Results from certain multiple myeloma patient samples may show a 
positive bias in recovery. Not all multiple myeloma patients show the 
bias and the severity of the bias may vary between patients.

Methodology:

Spectrophotometric

CPT Code:

82247

See Additional Information:
Chemistry Critical Lab Values