Macro AST

Alphabetical Test listing

Macro AST-994

Test name:

Macro AST

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Useful for:

Determining biologically active levels of AST, in asymptomatic patients with elevated AST levels
Ruling out the presence of macroAST

Specimen type:

Serum

Collection container:

Gold serum separator (SST) tube

Volume:

1.0 mL

Minimum volume:

0.6 mL

Collection instructions:

Immediately following collection, mix sample thoroughly by gentle inversion, 5 times

Processing instructions:

Allow sample to clot for a minimum of 30 minutes
Spin within two (2) hours of sample collection
Transfer serum to a Screw cap transfer vial/tube (Mayo T914), labelled as serum
Freeze

Transport container:

Screw cap transfer vial/tube (Mayo T914)

Alternate collection container:

Red serum vial/tube, 5 mL

Transport and stability:

Frozen (preferred) - 30 days

Refrigerated - 7 days

Ambient - 7 days

Performing lab:

Mayo Clinic Laboratories (ZW10): R-NX

Days set up:

Daily

TAT:

1 - 2 days

Method:

Photometric Rate, L-Aspartate with Pyridoxyl-5-Phosphate

Reference ranges:

See report

CPT codes:

No CPT

Date created:

11/14/2019

Revised date:

01/12/2024

Review date:

01/12/2024