An Observation on the Composition and Recurrence of Urinary Calculi

Takasaki, Etsuji

doi:10.1159/000279983

Cited by 35 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of the stone analyses in this study correspond well with those presented by other authors, except for their higher incidence of MAP calculi (11,12,14,17,23,24). It is difficult to compare different stone materials, since there is no standard pattern of presentation.…”

Section: Discussionsupporting

confidence: 80%

The Relation Between Urinary Tract Infections and Stone Composition in Renal Stone Formers

Holmgren

Danielson

Fellström

et al. 1989

Scandinavian Journal of Urology and Nephrology

View full text Add to dashboard Cite

During a seven-year period (1975-1981) a total of 1325 patients hospitalized for stone disease were studied as to the occurrence of positive urine cultures. Urinary stones from 535 surgically treated patients were analyzed with infrared spectrophotometry and the relationships between stone composition, level of surgery and bacteriological strains were studied. Positive urinary cultures were found in 34% of the surgically treated patients and in 21% of those not operated upon. Among the surgically treated patients with urinary tract infection (UTI) E. coli was the most frequent microorganism (35%), followed by Proteus (28%). Patients with Proteus infection had the highest frequency of UTI episodes, most of which occurred before hospitalization. There was a higher frequency of magnesium ammonium phosphate (MAP) calculi among patients with Proteus infection than among those with non-Proteus infection, in whom no difference in stone composition was found. Patients infected with E. coli had more phosphate-containing stones (CaP+MAP) than non-infected patients. The highest frequency of oxalate calculi (CaOx+CaOx/CaP) was found among patients without infection. No E. coli infections were seen in male patients with CaP and MAP calculi. MAP stones were most often found in the kidney and oxalate stones in the ureter.

show abstract

Section: Discussionsupporting

confidence: 80%

The Relation Between Urinary Tract Infections and Stone Composition in Renal Stone Formers

Holmgren

Danielson

Fellström

et al. 1989

Scandinavian Journal of Urology and Nephrology

View full text Add to dashboard Cite

show abstract

“…The peak age has shifted from the 3rd to the 5th decade, and the age span of commonly affected generations has widened to become similar to that in western countries [8]. The sharp rise of frequency in the 3rd decade, reported by Takasaki [10], is not seen any more. Interestingly, the highest risk group has been the generation born during the 1930s.…”

Section: Discussionmentioning

confidence: 96%

Epidemiology of Urolithiasis in Japan: A Chronological and Geographical Study

Yoshida

1990

Urol Int

158

View full text Add to dashboard Cite

A nationwide survey on urolithiasis in Japan between 1965 through 1987 was carried out, succeeding the previous 1955 and 1966 studies, in an effort to evaluate chronological and geographical changes in urolithiasis among the Japanese people who are relatively racially homogenous and living with similar customs and habits, which have changed dramatically from the old Japanese to westernized modes in a very short period after the Second World War. Incidence of calcium-containing urinary stones in the upper urinary tract has been increasing in Japan since the Second World War with increasing westernization of life-style and industrialization, with the annual incidence of urolithiasis steadily increasing from 53.8/100,000 general population in 1965 to 92.5 in 1985. According to the data, 5.4% of the population may be expected to develop a urinary calculus at least once in their life time. Analysis of 69,949 stones obtained during the years from 1978 to 1987 with infrared analysis showed that 79.4% were calcium oxalate and/or calcium phosphate stones, 7.4% were struvite with or without carbonate apatite, 5.2% were uric acid or urate, and 1.0% were cystine. In the era of new treatment modalities such as the endourological surgery and the extracorporeal shock wave lithotripsy, open surgical treatments were replaced with new types of treatment in about 75%ofthecasesin 1985.

show abstract

“…Struvite (MgNH4PO4" 6H20) forms about 15.4% of the composition of renal stones. These stones have a high degree of recurrence (about 39% [8]). Cystine can act as a seed and favours struvite crystallization by epitaxial overgrowth [9].…”

Section: Introductionmentioning

confidence: 99%

Crystallization of cystine

Girija

Kalkura

Ramasamy

1995

J Mater Sci: Mater Med

View full text Add to dashboard Cite

Cystine is an amino acid, which is a constituent of the urinary stones. It also is deposited in eyes, thyroid glands, bone marrow and white blood corpuscles. Crystals of cystine have been grown by both solution and gel methods. Small bunched hexagonal crystals, along with many other morphological crystals of size 0.3 mm across, were obtained. The crystals were analysed by X-ray diffraction and IR analyses.

show abstract

An Observation on the Composition and Recurrence of Urinary Calculi

Cited by 35 publications

References 15 publications

The Relation Between Urinary Tract Infections and Stone Composition in Renal Stone Formers

The Relation Between Urinary Tract Infections and Stone Composition in Renal Stone Formers

Epidemiology of Urolithiasis in Japan: A Chronological and Geographical Study

Crystallization of cystine

Contact Info

Product

Resources

About