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Table 145-1

Workup for an Outpatient with A Renal Stone

  1. Dietary and fluid intake history
  2. Careful medical history and physical examination, focusing on systemic diseases
  3. Noncontrast helical CT, with 5-mm CT cuts
  4. Routine UA; presence of crystals, hematuria, measurement of urine pH
  5. Serum chemistries: BUN, Cr, uric acid, calcium, phosphate, chloride, bicarbonate, PTH
  6. Timed urine collections (at least 1 day during week, 1 day on weekend): Cr, Na, K, urea nitrogen, uric acid, calcium, phosphate, oxalate, citrate, pH

Abbreviations: Cr, creatinine; PTH, parathyroid hormone.