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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Magnesium, Pediatric Urine
Test Code11220X
Includes
Creatinine
Preferred Specimen
Second Void Urine collected in Sterile Cup
Minimum Volume
1 mL
Instructions
Adjust pH to <3.0 with 6N HCl prior to aliquoting for Magnesium testing. Refrigerate after collection. Submit 2nd AM voided specimen.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 90 days
Refrigerated: 7 days
Frozen: 90 days
Methodology
Spectrophotometry (SP)
Setup Schedule
Set up: Tues-Sat; Report available: 2-5 days
Reference Range
Magnesium, Pediatric Urine
Creatinine, Random Urine
| <1 Month | Not Established |
| 1-11 Months | 0.10-0.48 mg/mg creat |
| 1 Year | 0.09-0.37 mg/mg creat |
| 2 Years | 0.07-0.34 mg/mg creat |
| 3-4 Years | 0.07-0.29 mg/mg creat |
| 5-6 Years | 0.06-0.21 mg/mg creat |
| 7-9 Years | 0.05-0.18 mg/mg creat |
| 10-13 Years | 0.05-0.15 mg/mg creat |
| 14-17 Years | 0.05-0.13 mg/mg creat |
Creatinine, Random Urine
| ≤6 Months | 2-28 mg/dL |
| 7-11 Months | 2-31 mg/dL |
| 1-2 Years | 2-110 mg/dL |
| 3-8 Years | 2-130 mg/dL |
| 9-12 Years | 2-160 mg/dL |
| >12 Years Male | 20-320 mg/dL |
| >12 Years Female | 20-275 mg/dL |
Clinical Significance
Urinary magnesium concentrations often decline before serum concentrations. Adverse effects, such as cardiac arrhythmias, can be observed while serum concentrations are within range.
