Test Overview
Test Methodology

Colorimetric (Biuret)

Test Usage

Evaluate serum proteins, nutritional status, liver function test, establish the diagnosis of hypoproteinemia and hyperproteinemia.

Reference Range *

1-11 years: 5.8-8.0 g/dL (58-80 g/L), 12-150 years: 6.0-8.3 g/dL (60-83 g/L).

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

There is a potential interference in results for patients receiving dextran as a blood volume expander. Results from plasma may be up to 0.4 mg/dL higher than those from serum due to fibrinogen in the sample.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

4 hours

Soft Order Code
PROT
MiChart Code
Protein
Synonyms
  • TP
  • PROT
  • Total Protein
  • PROTEIN LEVEL
Laboratory
Chemical Pathology
Section
Automation
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.

Alternate Specimen
Red top, Green top (sodium or lithium heparin) tube. [rev 11/09]
Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
84155
Fee Code
20519
LOINC
2885-2
Resources