Analysis On Associated Risk Factors Of Encrustation On The Surface Of Double J Stent

Objective: Analyzing associated risk factors of encrustation on the surface of double J stent, and providing evidence for preventing the encrustation on double J stent surface.Methods: Completed data of 324 cases who underwent double J stent implantation were retrospectively analyzed in the Affiliated Hospital of Zunyi Medical College during March 2015 and September 2015. According to whether encrustation on the surface of double J stent after extraction, patients were divided into two groups, named encrustation group and non-encrustation group. Gender, age, history of stone, double J stent placement side, double J stent brand, indwelling time, urine p H, urinary RBC, urinary WBC and urinary protein in two groups were analyzed by single-factor analysis. After single factor variable analysis, the associated risk factors of encrustation on the surface of double J stent were determined by multivariate Logistic regression analysis.Results: Total of 292 cases of 324 patients were enrolled in this study, including 190 cases of encrustation on the surface of double J stent and 102 cases were not. The data of two groups were analyzed by single factor statistical analysis, there were statistical differences in urinary RBC(P=0.010<0.05), stone history(P=0.007<0.01) and urinary protein(P=0.008<0.01) between two groups; but there was no significant difference in age, sex, placement side, double J stent brand, indwelling time, urine p H value, urine WBC value and so on between the two groups(P>0.05). Urinary RBC, stone history, urinary proteins were analyzed by Logistic regression multivariate analysis, stone history(P=0.014, 0R=2.613), urinary red blood cells(P=0.02, 0R=1.01) were the independent risk factors of calculus formation on the surface of double J stent.Conclusions: The stone history of the urinary tract system and urinary RBC were the independent risk factors for the encrustation of double J tubes in this study. For clinician,implanted double J stent should be extracted or replaced in time in patients with stone history of urinary tract system, and fellow-up were stricter. As far as possible to reduce the hematuria, the patients with indwelling double J stent should be advised to have more rest.