Effect of disinfection frequency of dispensing container on bacterial con-tamination of concentrated B solution / 中国感染控制杂志

ABSTRACT

Objective To reduce infection risk in hemodialysis patients through analyzing the causes of over stand-ard colony forming unit(CFU)and conducting bacteriological detection of hemodialysis concentrated B solution. Methods According to microbial monitoring results of hemodialysis concentrate B solution in a hospital between November 2011 and May 2012,disinfection frequency of B solution was changed and dispensing container was covered during the process of using,four groups were divided according to different measures (group A disinfected twice a week,covered dur-ing the process of using;group B twice a week;group C once a week;group D once every two weeks),monthly bacte-riological detection of B solution was conducted,condition before and after disinfection of four groups were com-pared.Results Bacterial count in group A,B ,C and D was(25.41 ±15.08),(28.24±28.04),(68.58 ±22.58), and (75.25±26.63)CFU/mL,respectively (F =79.00,P <0.01 );bacterial count of group A,B,and C after in-tervention were all lower than group D before intervention (all P <0.01),bacterial count of group A and B was the lowest.The qualified rate of group A was 100.00%,the unqualified rate of group B,C,and D was 13.95%, 24.24%,and 35.94% respectively(χ2 =28.70,P <0.01 ),the unqualified rates of group A,B,and C after inter-vention were all lower than group D.Conclusion Hemodialysis concentrated B solution should be used within 24 hours after preparing,disinfected twice a week,and covered during the process of using ,so as to control B solution colony number within the standard level.