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Phosphate (as Phosphorus) : 718
Test CodePHOSAU or 718
Alias/See Also
Phosphorus
CPT Codes
84100
Transport Container
Preferred Specimen
1 mL serum
Minimum Volume
0.5 mL
1 mL serum
Minimum Volume
0.5 mL
Transport Temperature
Room temperature.
Specimen Stability
Room temperature: 72 hours; Refrigerated: 7 days; Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, Plasma
Methodology
Spectrophotometry
Setup Schedule
Sunday - Saturday
Report Available
1 day
Reference Range
No age 2.5-4.5 mg/dL
<7 Days 4.0-9.0 mg.dL
7 Days-2 Years 4.0-8.0 mg/dL
3-12 Years 3.0-6.0 mg/dL
13-15 Years 3.2-6.0 mg/dL
16-18 Years 3.0-5.1 mg/dL
19-20 Years 2.7-5.0 mg/dL
21-64 Years 2.5-4.5 mg/dL
>64 Years 2.1-4.3 mg/dL
<7 Days 4.0-9.0 mg.dL
7 Days-2 Years 4.0-8.0 mg/dL
3-12 Years 3.0-6.0 mg/dL
13-15 Years 3.2-6.0 mg/dL
16-18 Years 3.0-5.1 mg/dL
19-20 Years 2.7-5.0 mg/dL
21-64 Years 2.5-4.5 mg/dL
>64 Years 2.1-4.3 mg/dL
Clinical Significance
Serum phosphorus (Phosphate) levels alone are of limited diagnostic value and should be correlated with serum calcium levels. An increased phosphorus with decreased calcium suggests either hypoparathyroidism or renal disease. A decreased phosphorus and an increased calcium suggests hyperparathyroidism or sarcoidosis. When both calcium and phosphorus are decreased diagnostic considerations include malabsorption, vitamin D deficiency and renal tubular acidosis. Increased phosphorus and normal or increased calcium suggests Milk-alkali syndrome or hypervitaminosis D.
Performing Laboratory
med fusion
