A Clinical Observation on Analysis of Urinary Stones

Kim, Ho Sung; Min, Byung Kap

Abstract

The exact analysis of urinary stones is very important to the study of the etiology of stone formation, prevention of recurrence and medical treatment. We Have analyzed 260 urinary stones obtained form 260 patients by X-ray diffraction method and studied the relationships of stone compositions to stone sites, patient age, sex and stone weight. The following results were obtained : 1. In this study 7 crystalline compositions of urinary stones were observed : Calcium oxalate monohydrate, Calcium oxalate dihydrate, Magnesium ammonium phosphate, Calcium magnesium phosphate, calcium phosphate, Uric acid and cystine. 2. Single composition stones were slightly more in number than mixed composition stones. Of 260 stones, 192(74%) were mainly composed of calcium oxalate, 38(14.4%) of magnesium ammonium phosphate, 19(7.3%) of calcium oxalate and calcium phosphate, 10(3.9%) of uric acid and 1(0.4%) of cystine. 3. Calcium oxalate stones was the most common of all the urinary stones and that comprised 80.7%(96) of all renal stones, 93.5%(86) of all ureteral stones, 46.2%(18) of all bladder stones and 100%(9) of all urethral stones. 4. Of 181 patients, ranged 30 to 59 years old who comprised 70% of all patients, 149(82.3 % of 181 patients) had calcium oxalate stones. 5. The ratio of the occurrence of magnesium ammonium phosphate to all renal or bladder stones from females was higher than that from males. 6 Of 27 stones weighed more than 10gm, 14(52%) were mainly composed of magnesium ammonium phosphate, and 10(37%) of calcium oxalate.