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Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

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Item Value
Available Stat? Yes
Test code PO4U
Performed by? Chemistry
Sendout? no
Price range $$
In House Availability 7 days
Principle Phosphomolybdate color complex, read spectrophotometrically.
Interpretation 1. Increased: Vitamin D excess, fibrous dysplasia, Paget's disease, metastatic bone cancer, multiple myeloma, sarcoid, hyperparathyroidism.

2. Decreased: hypoparathyroidism, secondary hyperparathyroidism (renal rickets), rickets, osteomalacia.
Collection Instructions Refrigerate during collection.
Sample type 24 hour urine collection preferred (refrigerate during collection)
Min. Volume 5 mL
Normal range Urine, 0.4-1.3 g/24 hr (13-42 mmol/d) varies with intake.
Interferences Many drugs can cause elevation or depression of serum and urine phosphorus, both in vitro and in vivo. If you have questions, contact the Laboratory Medicine Resident in Clinical Chemistry, x8593 or pager (415) 443-2311.

1. Increased: bed rest.

2. Decreased: diurnal variations, alkaline urine with standing.
References Bayer(TM) Clinical Methods In. Phos (40) B01-4144-01 Advia 1650 Operator's Guide. PN0735001-09. Siemens Medical Solutions Diagnostics, Malvern, PA.
CPT coding 84105
Last Updated 10/23/2012 4:32:12 PM
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