Magnesium, Timed Urine

Abbrev Code:UMGT   
Order Code:LAB3842Order Name:Magnesium Timed Urine
Methodology:Colorimetric endpoint
CPT Codes: 83735 x1, 83735 x1, 81050 x1, 81050 x1
Test Includes:Magnesium urine mg/dL; magnesium urine g/spec; duration in hours; volume in mL
Turnaround Time:Performed and reported 24 hours/day.
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Urine Collection Procedure

Collection Instructions

Specimen:Urine, timed collection (20-28 hours)
Optimal Volume:Submit entire collection; analysis requires 1 mL
Container:3 L plastic jug

Processing and Shipping

Specimen Processing:Mix collection well before aliquot is taken. Aliquot 5 mL, 1 mL minimum. Store in refrigerator.
Urine containing bladder fluid is acceptable. Enter coded comment IRRFL (urine contains bladder irrigation fluid).
Shipping Instructions:Ship at refrigerated temperature.
Stability:3 days refrigerated; 1 year frozen.
Test Performed at or Referral Lab Chemistry  (Roche-UMMC East)


Reference Range:Urine Chemistry Reference Ranges
Use:As an index of repletion of magnesium deficiency in hypomagnesemia; to rule out renal magnesium wasting.

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