|Values are valid only on day of printing.|
Evaluation of hypo- or hyperphosphatemic states
Evaluation of patients with nephrolithiasis
A timed 24-hour urine collection is the preferred specimen for measuring and interpreting this urinary analyte. Random collections normalized to urinary creatinine may be of some clinical use in patients who cannot collect a 24-hour specimen, typically small children. Therefore, this random test is offered for children <16 years old.