D-lactate, urine

Alphabetical Test listing

D-lactate, urine-994

Test name:

D-lactate, urine

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Useful for:

Preferred test for diagnosing D-lactate acidosis, especially in patients with jejunoileal bypass and short-bowel syndrome.

Specimen type:

Urine, random

Collection container:

Screw cap plastic container (non sterile)

Volume:

2.5 mL

Minimum volume:

0.5 mL

Processing instructions:

Pour off a 2.5mL (minimum 0.5mL) aliquot into a Transfer vial/tube with cap - 12mL (LabCorp), labeled as urine
Freeze

Transport container:

Transfer vial/tube with cap - 12mL (LabCorp)

Alternate specimen type:

Urine, 24 hour

Alternate collection container:

24-hr urine collection container, no additive

Alternate specimen volume:

2.5 mL aliquot of a 24-hour urine collection

Alternate collection instructions:

How to collect a 24-hr urine sample

Alternate processing instructions:

Mix 24 hour collection well
Measure and record the total volume
Pour off a 2.5mL (minimum 0.5mL) aliquot into a Transfer vial/tube with cap - 12mL (LabCorp), labelled as urine
Freeze

Alternate transport container:

Transfer vial/tube with cap - 12mL (LabCorp)

Required forms/information:

Total volume for 24-hour collections

Transport and stability:

Frozen (preferred) - 90 days

Refrigerated - 90 days

Ambient - 90 days

Specimen retention time:

1 month

Performing lab:

Mayo Clinic Laboratories (DLAU) via LabCorp (284037): R-NX

Days set up:

Mo, Th

TAT:

3-6 days

Method:

Gas Chromatography-Mass Spectrometry (GCMS) Stable Isotope Dilution Analysis

Reference ranges:

0.0 - 0.25 mmol/L

Cautions:

The test performed is for D-lactate. This is a product of bacterial overgrowth in the gastrointestinal tract. It should not be confused with L-lactate, which accumulates in some metabolic acidosis.

CPT codes:

83605

Date created:

06/13/2022

Revised date:

10/05/2023

Review date:

10/05/2023