Magnesium, Fecal

Casandra

Casandra Test Code AR47394Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0020105CPT Code 83735

Also known as: FECMG

Clinical Use

Order Test

Use

The Magnesium, Fecal test is used to evaluate magnesium levels in stool, which can help diagnose conditions like malabsorption syndromes or excessive magnesium intake. It aids in clinical decision-making by providing insight into the patient's gastrointestinal absorption and excretion of magnesium.

Special Instructions

For accurate results, the specimen should be collected as a 24-hour or random stool sample. It's crucial to mix the stool specimen well and transfer at least 5 g to an unpreserved stool transport vial. Do not add saline or water to the specimen, and be sure to indicate the total collection time and weight. All specimens should be refrigerated immediately after collection to maintain stability.

Limitations

This test is specifically designed for clinical purposes and should be interpreted in the context of other clinical and laboratory findings. It was developed and its performance characteristics determined by ARUP Laboratories but has not been cleared or approved by the US Food and Drug Administration (FDA). Incorrect specimen handling could compromise test results. Formed or viscous stools are not accepted as they may interfere with the accuracy of the test.

Test Details

New York Approved

Methodology

Automated Analyzer (Clinical Chemistry)

Biomarkers

2 components

Magnesium, Fecal - per volume • Clinical ChemistryMagnesium, Fecal - per 24h • Clinical Chemistry

LOINC Codes

Order Codes

13363-7
29911-5
29912-3
30078-0

Result Turnaround Time

1-2 days

Specimen

Stool

Volume

5 g

Minimum Volume

1 g

Container

Unpreserved stool transport vial (ARUP Supply #40910)

Collection Instructions

Collect 24-hour or random stool. Mix specimen well and transfer 5 g to unpreserved stool transport vial. Available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787. Min: 1 g. Do not add saline or water to liquefy specimen. Indicate total time and weight.