Days Set Up
Monday - Saturday
Analytic Time

2 - 3 days

MiChart Code
Alpha-1 Antitrypsin, Clearance
Soft Order Code
A1AFS

Test Updated:

Synonyms

A-1 Antitrypsin Clearance
A-1 AT Clearance
A1AT Clearance
CA1A
ALPHA-1-ANTITRYPSIN CLEARANCE
A1A CONC
A1AT-S
CLEARANCE
ALPHA-1-ANTITRYPSIN CONCENTRAT
ALPHA-1-ANTITRYPSIN, SERUM
Alpha 1 Antitrypsin Clearance

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Test Overview

Test Methodology

Nephelometry

Test Usage

Elevated alpha-1 antitrypsin clearance suggests exessive gastrointestinal protein loss.

Reference Range

Clearance: < or = 27 mL/24 hours; Fecal Concentration: < or = 54 mg/dl; Serum: 100 - 190 mg/dl.

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

Specimen Requirements

Collection Offsite

Collect 24 hour stool sample. Freeze. Send entire stool collection. Collect blood in SST or red top tube. Aliquot serum into a plastic vial and freeze. Draw serum sample during the stool collection period.

Yellow Top Tube
Normal Volume
1 mL serum AND entire 24 hour stool collection
Minimum Volume
0.5 mL serum AND 1.0 ml stool

Billing Information

CPT Code
82103
Pro Fee Code
 
LOINC
 

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.