| 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, Plasma or Serum
Test CodeMG - NOCO
CPT Codes
83735
Preferred Specimen
1 mL plasma from Green top (Lithium Heparin)
Minimum Volume
Other Acceptable Specimens
1 mL serum from Serum Gel or Red Top
Specimen Stability
| Specimen Type | Temperature | Time |
| Plasma Li Hep | Refrigerated | 7 days |
| Serum SST | Refrigerated | 7 days |
| Red Top – Separated* | Refrigerated | 7 days |
*Centrifuge and aliquot into a plastic vial.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Mild hemolysis
Methodology
Spectrophotometric Bichromatic Endpoint
Setup Schedule
Monday through Sunday; Continuously
Report Available
Same day
Reference Range
1.5 - 2.5 mg/dL
Critical value (automatic call-back):<1.0 mg/dL or >4.9 mg/dL
Critical value (automatic call-back):<1.0 mg/dL or >4.9 mg/dL
Clinical Significance
This assay is used for diagnosing and monitoring hypomagnesemia (magnesium deficiency) and hypermagnesemia (magnesium excess). Numerous studies have shown a correlation between magnesium deficiency and changes in calcium- , potassium- and phosphate-homeostasis which are associated with cardiac disorders such as ventricular arrhythmias that cannot be treated by conventional therapy, increased sensitivity to digoxin, coronary artery spasms, and sudden death. Additional concurrent symptoms include neuromuscular and neuropsychiatric disorders. Hypermagnesemia is found in acute and chronic renal failure, magnesium excess, and magnesium release from the intracellular space.
Performing Laboratory
Banner Fort Collins Medical Center Laboratory
Mckee Medical Center Laboratory
North Colorado Medical Center Laboratory
Summit View Laboratory
