TIME TO STONE PASSAGE FOR OBSERVED URETERAL CALCULI: A GUIDE FOR PATIENT EDUCATION

Interval to stone passage is highly variable and dependent on stone size, location and side. Degree of pain, and patient gender and age had no bearing on the time to stone passage. Of ureteral stones 95% 2 to 4 mm. pass spontaneously but passage may take as long as 40 days. Intervention may be required in 50% of ureteral calculi greater than 5 mm.