Phosphorus, Inorganic, Plasma or Serum

Casandra

Casandra Test Code AR70785Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0020028CPT Code 84100

Phosphorus, Inorganic, Plasma or Serum

Also known as: PHOS

Clinical Use

Order Test

Use

The Phosphorus, Inorganic, Plasma or Serum test is used to measure the level of inorganic phosphate in the plasma or serum. Phosphate levels are essential for various bodily functions, including bone formation, energy storage, and the regulation of biochemical pathways. Abnormal phosphate levels can be indicative of disorders such as kidney disease, parathyroid gland dysfunction, or Vitamin D imbalance. This test aids in diagnosing and managing conditions like nephrolithiasis (kidney stones), hypocalcemia, and hypercalcemia.

Special Instructions

Collect plasma separator tube or serum separator tube. Additional acceptable tubes include Green (lithium heparin), Lavender (K2 EDTA), or Pink (K2 EDTA). Allow serum tube to clot completely at room temperature. Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. Minimum volume is 0.2 mL.

Limitations

The test may be affected by hemolysis and certain anticoagulants. Hemolyzed specimens and those collected in sodium fluoride/potassium oxalate or citrate tubes are unacceptable. The test does not measure organic phosphate levels and may not fully reflect the phosphate state in certain pathological conditions. Stability concerns may arise if samples are not stored or transported under recommended conditions.

Test Details

FDA Approved