Document Detail

Urinary citrate in kidney stone disease.
MedLine Citation:
PMID:  14714831     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Hypocitraturia, or low urinary citrate excretion is known as a risk for nephrolithiasis. Though urinary citrate excretion is basically determined by acid-base balance, metabolic acidosis is not always manifest in urinary stone patients with hypocitraturia. From our stone clinic data, we estimated the incidence of hypocitraturia and addressed its causes in the absence of obvious acid-base imbalance. METHODS: We selected 310 stone patients in whom 24-hour urine chemistry was examined on regular diets on 2 or more occasions during follow-up. Totally, 1361 specimens were analyzed in them. RESULTS: In the male subjects, the average urinary citrate excretion was 450.9 +/- 284.4 mg/ day, whereas in the female, 536.5 +/- 305.9 mg/day (p < 0.0001). Eventually, hypocitraturia was found in 119 of the 310 patients (38.4 %). Of 222 with calcium stones, 70 (31.5 %) had hypocitraturia. In 32 of those, potential causes of hypocitraturia were identified, but in the rest, no apparent cause was found. In the latter, the net gastrointestinal alkali absorption was calculated from the 24-hour urine chemical data, and it was lower in those with hypocitraturia than in the normal control (9.2 vs. 34.4). CONCLUSION: It was suggested that defective gastrointestinal alkali absorption may be involved in hypocitraturia of calcium stone patients.
Yukio Usui; Shouji Matsuzaki; Kazuo Matsushita; Masanori Shima
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Tokai journal of experimental and clinical medicine     Volume:  28     ISSN:  0385-0005     ISO Abbreviation:  Tokai J. Exp. Clin. Med.     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2004-01-12     Completed Date:  2004-07-27     Revised Date:  2010-03-29    
Medline Journal Info:
Nlm Unique ID:  7704186     Medline TA:  Tokai J Exp Clin Med     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  65-70     Citation Subset:  IM    
Department of Urology, Tokai University School of Medicine, Isehara, Kanagawa, Japan.
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MeSH Terms
Alkalies / metabolism
Citrates / urine*
Digestive System / metabolism
Kidney Calculi / metabolism,  urine*
Middle Aged
Sex Characteristics
Reg. No./Substance:
0/Alkalies; 0/Citrates

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