•Inorganic Phosphate, Blood
Causes of high phosphorus: Youth; exercise; dehydration and hypovolemia; high phosphorus content enema; acromegaly; hypoparathyroidism; pseudohypoparathyroidism; bone metastases; hypervitaminosis D; sarcoidosis; milk-alkali syndrome; liver disease, such as portal cirrhosis; catastrophic events such as cardiac resuscitation, pulmonary embolism, renal failure; diabetes mellitus with ketosis; serum artifact−sample not refrigerated; overheated, hemolyzed sample, or serum allowed to remain too long on the clot. Causes of low phosphorus: (Hypophosphatemia may occur with or without phosphate depletion. Serum levels vary as much as 2.0 mg/dL during the day.)
Serum (preferred) or plasma.
Red-top tube, gel-barrier tube, green-top (heparin) tube, or lavender-top (EDTA) tube.
Patient should be fasting.
Separate serum or plasma from cells within 45 minutes of collection.
Maintain specimen at room temperature.
Hemolysis; gross lipemia; improper labeling.
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