-1651085832.png){kind=logo}
Home
HelpTest Code PHOSS Phosphorus (Inorganic), Serum
Specimen Required
Only orderable as part of profile. For more information see:
-RTRP2 / Tubular Reabsorption of Phosphorus, Random Urine and Serum
-TRPP / Tubular Reabsorption of Phosphorus, Serum/Plasma/Urine
Patient Preparation: Fasting 12 hours, required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL serum
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged and the serum aliquoted into a plastic vial within 2 hours of collection.
Useful For
Diagnosis and management of a variety of disorders including bone, parathyroid, and kidney disease
Method Name
Only orderable as part of profile. For more information see:
-RTRP2 / Tubular Reabsorption of Phosphorus, Random Urine and Serum
-TRPP / Tubular Reabsorption of Phosphorus, Serum/Plasma/Urine
Photometric, Ammonium Molybdate
Reporting Name
Phosphorus (Inorganic), SSpecimen Type
SerumSpecimen Minimum Volume
Serum: 0.25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | 7 days |
| Frozen | 365 days |
Reject Due To
| Gross hemolysis | Reject |
Reference Values
Only orderable as part of profile. For more information see:
-RTRP2 / Tubular Reabsorption of Phosphorus, Random Urine and Serum
-TRPP / Tubular Reabsorption of Phosphorus, Serum/Plasma/Urine
Males
<1 year: Not established
1-4 years: 4.3-5.4 mg/dL
5-13 years: 3.7-5.4 mg/dL
14-15 years: 3.5-5.3 mg/dL
16-17 years: 3.1-4.7 mg/dL
≥18 years: 2.5-4.5 mg/dL
Females
<1 year: Not established
1-7 years: 4.3-5.4 mg/dL
8-13 years: 4.0-5.2 mg/dL
14-15 years: 3.5-4.9 mg/dL
16-17 years: 3.1-4.7 mg/dL
≥18 years: 2.5-4.5 mg/dL
Interpretation
Hypophosphatemia is relatively common in hospitalized patients. Serum concentrations of phosphate between 1.5 and 2.4 mg/dL may be considered moderately decreased and are not usually associated with clinical signs and symptoms. Levels below 1.5 mg/dL may result in muscle weakness, hemolysis of red cells, coma, bone deformity, and impaired growth.
The most acute problem associated with rapid elevations of serum phosphate levels is hypocalcemia with tetany, seizures, and hypotension. Soft tissue calcification is also an important long-term effect of high phosphorus levels.
Phosphorus levels below 1.0 mg/dL are potentially life-threatening and are considered a critical value in the Mayo Health System.
Day(s) Performed
Monday through Sunday
Report Available
Same day/1 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PHOSS | Phosphorus (Inorganic), S | 2777-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| PHOSS | Phosphorus (Inorganic), S | 2777-1 |