| 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, 24HR URINE
Test CodeLAB406
Quest Code
11322
CPT Codes
83735
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
10 mL urine - See Collection Instructions
Minimum Volume
1 mL
Instructions
Please submit a 10 mL aliquot of a 24-hour collection. Collect urine with 25 mL of 6N HCL to maintain a pH below 3.
Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning's first voiding. Record 24-hour urine volume on test requisition and urine vial.
Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning's first voiding. Record 24-hour urine volume on test requisition and urine vial.
Transport Container
Sterile screw-cap container
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
p.m. Tues-Sat
Report Available
3-5 days
Reference Range
Magnesium, 24-Hour Urine
| Male | 28-180 mg/24 h |
| Female | 18-130 mg/24 h |
Clinical Significance
Useful in the assessment of nutritional and metabolic disorder. Increased levels indicate renal and respiratory failure and decreased levels indicate seizures, tetany, cardiac arrhythmias, Low CA++ and K+.
Performing Laboratory
| Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
| 33608 Ortega Highway |
| San Juan Capistrano, CA 92675-2042 |
Last Updated: February 7, 2022
