Clinical and Epidemiological Studies on Urolithiasis in Han

Abstract

Clinical and epidemiological studies were performed on 1184 cases of urolithiasis treated in the Department of Urology, Poh Ai Hospital. The incidence of urolithiasis was 147/100,000 population in 1991. The highest incidence was found in pactients in their 50s. The male to female uatio was 2.9:1. There were 895 cases with single stones, and 289 cases with multiple stones. The ratio of upper to lower urinary tract stones was 13.6 :1. Among the hospitalized patients. 673 cases (56.8%) received surgical treatment and 511 cases (43.2%) received conservative treatment with spontaneous stone passage. Among 1071 cases of upper urinary tract calculi , 567 cases(52.9%) received surgical treatment : 236 cases (41.6%) were treated by endoscopic surgery, 176 cases (31.0%) were treated by open- surgery and 131 cases (23 .1%) by extracorporeal shock wave lithotripsy. Among 79 cases of lower urinary tract calculi. 75 cases (94.9%) were treated surgically: 68 cases (90.7%) by transurethral endoscopic surgery and 7 cases (9.3%) by cystolithotomy. According to analysis of 365 stones, the most frequent type was calcium-containing stones (92.3%). Pyuna was noted in 250 out of 1086(23.0%) cases. Bactenuria was noted in 202 out of 914 (22.1%) cases. Concerning organisms isolated from the urine. staphylococcus epidermidis was found most frequently (55/202). Stone patients increased in number during the summer season (July and August). Systematic questionnaires completed by the patients with urolithiasis. lead us to the following conclusions: 1) 50.7% (216/438) of patients gave a past history of urolithiasis, and 2. family histories show that males whose siblings have urolithiasis were at the highest risk of uolithiasis, followed by those whose fathers had a history of urloithiasis.#0088#