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81345M
MAGNESIUM, QUANTITATIVE, FECES

Test Code 81345M 
Test MAGNESIUM, QUANTITATIVE, FECES 
Methodology Atomic Emission Spectroscopy (AES) 
Description Useful for diagnosis of osmotic diarrhea due to excessive ingestion of magnesium. 
Specimen A minimum of 20 mL of very liquid stool. Send specimen FROZEN on dry ice. See "Stool Collections".

NOTE:
1. DO NOT SEND FORMED STOOL. In the event a hard, formed stool is submitted, the test will not be performed; and the report will indicate "A hard, formed stool specimen was submitted for analysis. This test was not performed because it only has clinical value if performed on a naturally occurring, watery stool specimen."
2. Timed collections (24 hour) will also be accepted. 

Reference Values < 30 mEq/24 hours
< 200 mEq/kg (random collections) 
Analytic Time 1 Day 
Day(s) Test Set Up Monday through Saturday 
CPT Code(s) 83735  

Special Instructions