尿路結石の研究

Abstract

187 urinary stones were analyzed by infrared spectroscopy. 1) The composition of 187 calculi was as follows. Calcium oxalate combined with calcium phosphate composed 47.1 % of 187 stones, calcium oxalate alone 27.1 %, combination of calcium phosphate and magnesium ammonium phosphate 7.0%, combination of calcium oxalate, calcium phosphate and magnesium ammonium phosphate 4.8%, magnesium ammonium phosphate alone 3.2%, uric acid 1.6% and cystine 1.1 %. 2) 75.8% of urinary stones contained calcium in some form, and 93% contained oxalate or phosphate. 3) Recurrent calculi (in 8 patients) showed not always the same composition as the former calculi. 4) The most common upper urinary tract calculus was calcium oxalate calculus combined with apatite, but in staghorn calculi, magnesium ammonium phosphate was the most common. 5) Magnesium ammonium phosphate stone and acid uric ammonium stone were more frequent in bladder stones than in upper urinary tract stones and often accompanied urinary tract infection. 6) The total recurrence rate was 24.9%.