title: Chemical compositions of 300 lower urinary tract calculi and associated disorders in the urinary tract.
abstract: The stones removed from 273 patients (220 males, 53 females) with bladder stones and 27 patients with urethral stones (males) were analyzed by infrared spectroscopy. Of these stones 50.0% contained magnesium ammonium phosphate (MAP), 39.9% calcium (oxalate and/or phosphate), 9.4% uric acid (urate), and 0.7% cystine. The disorders associated with bladder stones were prostatic hyperplasia and cancer (47.8%), neurogenic bladder (11.8%), urethral stricture (3.6%) and so on in males, and neurogenic bladder (48.1%), after operation of uterus (29.0%), bladder cancer (5.7%) and so on in females. Urinary infections were complications in 59.3% of patients with MAP stones, 41.2% with urate stones and 20.0% with calcium stones. The most often isolated bacteria from the infected urine were of the Proteus species.
authors.affiliation: Department of Urology, Dokkyo University School of Medicine, Tochigi, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Takasaki
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.forename: M
authors.initials: M
authors.lastname: Honda
authors.forename: T
authors.initials: T
authors.lastname: Imai
authors.forename: S
authors.initials: S
authors.lastname: Maeda
authors.forename: Y
authors.initials: Y
authors.lastname: Hosoya
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001437:Bacteriuria / Q000150:complications / Q000382:microbiology; D002129:Calcium Oxalate / Q000032:analysis; D002130:Calcium Phosphates / Q000032:analysis; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D003553:Cystine / Q000032:analysis; D005260:Female; D006801:Humans; D017616:Magnesium Compounds / Q000032:analysis; D008297:Male; D008875:Middle Aged; D010710:Phosphates / Q000032:analysis; D011470:Prostatic Hyperplasia / Q000150:complications; D013055:Spectrophotometry, Infrared; D000069877:Struvite; D014522:Urethral Diseases / Q000150:complications / Q000378:metabolism; D014527:Uric Acid / Q000032:analysis; D001744:Urinary Bladder Calculi / Q000737:chemistry / Q000150:complications; D001750:Urinary Bladder, Neurogenic / Q000150:complications; D014545:Urinary Calculi / Q000737:chemistry* / Q000150:complications; D014552:Urinary Tract Infections / Q000150:complications; D014570:Urologic Diseases / Q000150:complications*
chemical_list: D002130:Calcium Phosphates; D017616:Magnesium Compounds; D010710:Phosphates; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; D002129:Calcium Oxalate; D014527:Uric Acid; D003553:Cystine; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; D000069877:Struvite; C485829:calcium phosphate, dibasic, anhydrous