Description
The majority (around 88%) of phosphorus in the body is localised in the bones in the form of calcium phosphate. The remainder is involved in carbohydrate metabolism and in physiologically important substances such as phospholipids, nucleic acids and ATP. In the blood, phosphorus is found in both the organic and the inorganic forms. The level of inorganic phosphorus in the blood is linked with that of calcium in an inverse relationship under the control of vitamin D and parathyroid hormone (PTH).
Indications
Most of serum phosphorous is present as inorganic phosphorus. Hyperphosphataemia is found in vitamin D intoxication, hypoparathyroidism, and renal failure. Hypophosphataemia may be seen with rickets, hyperparathyroidism and Fanconi’s syndrome.
Sample Type, Quantity & Conditions
1 ml Serum 1 ml Li, Na, NH4+-Heparin or K2, K3-EDTA Plasma Stability: 24 Hours at 15-25 °C 4 Days at 2-8 °C 1 Year at (-15)-(-25) °C Critical Values: <1.0 >9.0 mg/dL
Special Precautions
Normal Range
Adults: 2.5-4.5 mg/dL 0.81-1.45 mmol/L Male 1-30 Days: 3.9-6.9 mg/dL 1.25-2.25 mmol/L Female 1-30 Days: 4.3-7.7 mg/dL 1.40-2.50 mmol/L Male 1-12 Months: 3.5-6.6 mg/dL 1.15-2.15 mmol/L Female 1-12 Months: 3.7-6.5 mg/dL 1.20-2.10 mmol/L Male 1-3 Years: 3.1-6.0 mg/dL 1.00-1.95 mmol/L Female 1-3 Years: 3.4-6.0 mg/dL 1.10-1.95 mmol/L Male 4-6 Years: 3.3-5.6 mg/dL 1.05-1.80 mmol/L Female 4-6 Years: 3.2-5.5 mg/dL 1.05-1.80 mmol/L Male 7-9 Years: 3.0-5.4 mg/dL 0.95-1.75 mmol/L Female 7-9 Years: 3.1-5.5 mg/dL 1.00-1.80 mmol/L Male 10-12 Years: 3.2-5.7 mg/dL 1.05-1.85 mmol/L Female 10-12 Years: 3.3-5.3 mg/dL 1.05-1.70 mmol/L Male 13-15 Years: 2.9-5.1 mg/dL 0.95-1.65 mmol/L Female 13-15 Years: 2.8-4.8 mg/dL 0.90-1.55 mmol/L Male 16-18 Years: 2.7-4.9 mg/dL 0.85-1.60 mmol/L Female 16-18 Years: 2.5-4.8 mg/dL 0.80-1.55 mmol/L
