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HelpTest Code PHOS Phosphorus Level
Additional Codes
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Cerner |
NextGen |
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Phosphorus Level |
Phosphorus Level |
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Phos |
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Alternate Name(s)
Phosphate
PO4
Methodology
Colorimetric (reflectance spectrophotometry).
Patient Preparation
None
Collection Instructions
Standard phlebotomy practices.
Specimen Requirements
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Container |
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Stability |
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Rejection Criteria |
Gross Hemolysis |
Result Reporting and Reference Values
Reported in mg/dL.
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Age |
Low |
High |
Critical Low |
Critical High |
|
0-7 days |
4.6 |
8.0 |
1.5 |
15.0 |
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7d –4Y |
3.9 |
6.5 |
1.5 |
15.0 |
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4 – 7Y |
4.0 |
5.4 |
1.5 |
15.0 |
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7 – 12Y |
3.7 |
5.6 |
1.5 |
15.0 |
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12 – 14Y |
3.3 |
5.4 |
1.5 |
15.0 |
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14 – 16Y |
2.9 |
5.4 |
1.5 |
15.0 |
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16 – 18 y |
2.8 |
4.6 |
1.5 |
15.0 |
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18 – 150 y |
2.5 |
4.5 |
1.5 |
15.0 |
Reflex Testing
None
Limitations
Ortho reports no significant effect with the following:
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- Bilirubin up to 40 mg/dL
- Lipemia up to 800 mg/dL
Useful For
Phosphorus, as phosphate, is distributed throughout the body. Causes of high serum phosphorus include dehydration, hypoparathyroidism, hypervitaminosis D, metastases to bone, sarcoidosis, pulmonary embolism, renal failure, and diabetes mellitus with ketosis. Low serum phosphorus is found in primary hyperparathyroidism and other causes of serum calcium elevation, sepsis, vitamin D deficiency, renal tubular disorders, chronic hemodialysis, vomiting and occasionally with decreased dietary phosphate intake.