Magnesium, Timed Urine
| Abbrev Code: | UMGT | ||
| Order Code: | LAB3842 | Order 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. | ||
| Associated Links: | |||
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) |
Interpretive
| 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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