|Available:||Daily, 24 hours|
|Turnaround:||Routine: 3 hours, STAT 30 minutes|
|Container:||3 mL green top tube or green microtainer (sodium heparin); red top acceptable|
|Temperature:||Transport to laboratory within 30 minutes.|
|Uses:||Magnesium is involved in the formation and breakdown of ATP which affects muscle function, including contraction. Magnesium also contributes to bone structure.|
|Limitations:||Hemolysis will yield elevated results.|
|Method:||Dye binding biochromatic endpoint|
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