Bilirubin, Total

Label Mnemonic:	BILT
Epic code:	LAB50
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Chemistry
6240 RCP
356-3527

Specimen(s):

Plasma

Specimen Instructions:

Protect micro-specimens from unnecessary exposure to light.

Collection Medium:

Plasma Separator Tube 4.5 mL

Alternate Collection Media:

Call laboratory for additional acceptable specimen collection containers.

Minimum:

3 mL whole blood from light green top tube or 1 light green Microtainer^® for pediatric patients

Testing Schedule:

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

Turn Around Time:

1 hour (upon receipt in laboratory)

Reference Range:

0-2 days:            0.2-6.0 mg/dL
2-3 days:            0.2-7.0 mg/dL
3-11 days:           0.2-10.0 mg/dL
11-31 days:          0.2-1.0 mg/dL
1 month-17 years:    0.2-1.0 mg/dL
18 years & older:    1.2 mg/dL or less (as of 2/24/15)

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.

Comments:

Refer to BD Microtainer^® Tubes product sheet for detailed sample collection instructions.

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 800 
(approximate hemoglobin concentration: 800 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
3 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.

Immunoglobulins: No significant interference from immunoglobulins 
(IgG) up to a concentration of 2,800 mg/dL.

Methodology:

Colorimetric diazo method

CPT Code:

82247

See also:
Bilirubin, Total-Other, Body Fluid

See Additional Information:
Chemistry Critical Lab Values