title: [The Cross-sectional Study on the Influence Factors for Encrustation of Double J Stent in Patients with Urolithiasis].
abstract: OBJECTIVE
  To study the influence factors for encrustation of double J stent in patients with urolithiasis.
  
  
  METHODS
  In this study, there were 84 urolithiasis patients with double J stent included from February to July 2014 in our hospital. The encrustation on double J stent was evaluated by a PC stereo microscope. The nterrelated clinical data were obtained, then the factors which may affect the encrustation were studied by logistic regression analysis.
  
  
  RESULTS
  The mean indwelling time was (17. 0±6. 0) d, and a thin encrustation formed on the stents for most cases [67/84(79. 8%)]. Compared with the cases who did not form a thin encrustation, those having a thin encrustation formation on the stent were younger [(44. 9±11. 5) vs. (54. 4±12. 6), P=0. 004]; The patients with proteinuria got a higher rate of encrustation [62/73(84. 9%) vs. 5/11 (45. 5%), P=0. 002]. The patients with urinary tract infection had a higher rate of encrustation [26/28(92. 9%) vs. 41/56(73. 2%), P 3. 035]. The patients with hematuriaalso got a higher rate of encrustation [67/80(83. 8%) vs. 0/4, P=0. 001]. Different sex, retention time,serum calcium,inorganic phosphorus, uric acid, urine pH,lithiasis component had no effects on encrustation (P>0. 05). Logistic regression analysis showed that age and proteinuria was retained as idependent correlated factors with encrustation (P<0. 05), while hematuria and urinary tract infections had a low ntensity correlation with encrustation (P>0. 05).
  
  
  CONCLUSIONS
  For encrustation of double J stentin patients with urolithiasis, younger age, increased urinary protein, hematuria and infections are important risk-factors.
authors.forename: Xiang-ming
authors.initials: XM
authors.lastname: Cao
authors.forename: Jia-ming
authors.initials: JM
authors.lastname: Liu
authors.forename: Bang-hua
authors.initials: BH
authors.lastname: Liao
authors.forename: Chi-hai
authors.initials: CH
authors.lastname: Zhu
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.forename: De-yi
authors.initials: DY
authors.lastname: Luo
authors.forename: Jian-zhong
authors.initials: JZ
authors.lastname: Wang
authors.forename: Kun-jie
authors.initials: KJ
authors.lastname: Wang
mesh_terms: D003430:Cross-Sectional Studies; D006801:Humans; D012307:Risk Factors; D015607:Stents; D014527:Uric Acid; D014545:Urinary Calculi; D052878:Urolithiasis
chemical_list: D014527:Uric Acid