Test Code TBIL Total Bilirubin

Important Note

Protect specimens from light.

This orderable is for patients >30 days of age. For patients ≤30 days of age Neonatal Bilirubin must be used.

Additional Codes

Cerner	NextGen
Bilirubin Total	Bilirubin Total
Bili T
BiliT

Useful For

Total bilirubin in serum and plasma is the sum of unconjugated bilirubin (Bu), mono- and di-glucuronide conjugated bilirubin (Bc) and delta bilirubin (DELB), a bilirubin fraction covalently bound to albumin. With the exception of anicteric jaundice, total serum bilirubin is invariably increased in jaundice. Causes of jaundice are prehepatic, resulting from various hemolytic diseases; hepatic, resulting from hepatocellular injury or obstruction; and posthepatic, resulting from obstruction of the hepatic or common bile ducts.

Methodology

Colorimetric (reflectance spectrophotometry).

Patient Preparation

None

Collection Instructions

Standard phlebotomy practices.

Protect specimens from light.

Specimen Requirements

Container

Specimen Type	Tube
Lithium Heparin Plasma
PST	or or
Serum	or
SST	or or

Stability

Storage	Temperature	Stability
Room Temperature	18-28°C	≤ 4 hours If separated within 4 hours
Refrigerated	2-8°C	≤ 7 days If separated within 4 hours
Frozen	≤-18 °C	≤ 6 months

Rejection Criteria

Gross Hemolysis

Result Reporting and Reference Values

Reported in mg/dL.

Age	Low	High	Critical Low	Critical High
30 days – 18 years	0.1	1.3	N/A	N/A
18 -150 years	0.2	1.3	N/A	N/A

Reflex Testing