Turnaround times
The quoted turnaround time is from sample receipt in the laboratory, to results authorisation in the Laboratory Information Management system. The times do not include transport of specimen to the laboratory or the administrative process to print and post/email reports. Service users must allow for transport and reporting time when ordering tests.
Clinical background:
Urine magnesium is primarily used in the diagnosis / investigation of magnesium deficiency. Renal excretion of magnesium is the major mechanism for magnesium homeostasis. The amount excreted is dependent on intake and serum concentration of magnesium.
Specimen container paediatric:
Serum (SST or plain tube)
Specimen container adult:
Serum (SST or plain tube)
Minimum volume paediatric:
1 mL urine
Minimum volume adult:
1 mL urine
Special requirements:
Collect 24h urine in acid-rinsed bottle without preservative.
Reference ranges:
Random:
6 months to <1 year: 0.4-2.2 mmol/mmol
creatinine1 to <2 year: 0.4-1.7 mmol/mmol creatinine2 to <3 year: 0.3-1.6 mmol/mmol creatinine3 to <5 year: 0.3-1.3 mmol/mmol creatinine5 to <7 year: 0.3-1 mmol/mmol creatinine7 to <10 year: 0.3-0.9 mmol/mmol creatinine10 to <14 year: 0.2-0.7 mmol/mmol creatinine14 to <17 year: 0.2-0.6 mmol/mmol
creatinine24 hour urine collectionAdult: 2.4 to 6.5 mmol/24h
Other info:
Lithium heparin and EDTA plasma samples also acceptable