Urinary Tract Calculi III: Medical Management

Diagnosis of renal calculi involves imaging studies, such as non-contrast CT scans and ultrasounds, to visualize the stones.

Additionally, laboratory tests, including urinalysis and urine pH measurements, help identify stone types.

Blood tests assess uric acid and calcium levels, with hyperuricemia indicating a risk for uric acid stones and hypercalcemia for calcium stones.

Management of kidney stones primarily focuses on pain relief, typically achieved using NSAIDs or opioids.

Alpha-adrenergic blockers, such as tamsulosin, are often prescribed to relax ureteral smooth muscle, facilitating the passage of stones smaller than 5 millimeters.

Stone-specific treatments depend on composition: Calcium oxalate stones are managed with thiazide diuretics to reduce calcium excretion and potassium citrate to alkalinize urine.

Cystine stones are treated with tiopronin to lower urine cystine levels.

Uric acid stones require urine alkalinization with potassium citrate, while allopurinol helps reduce uric acid production.

Struvite stones often necessitate surgical removal along with acetohydroxamic acid to inhibit urease.