ABSTRACT
Objective To explore optimum cycle of Automatic Washer Disinfector for endozime auto wash triple plus with advanced proteolytic action to ensure mechanical cleaning quality and improve safety of reusable medical instruments. Methods Visual inspection, STF cleaning efficacy monitoring test and Adenosine Triphosphate (ATP) test were used to verify cleaning quality of the newly updated No.4 automatic washer disinfector, and changed key parameters on weekly basis, such as pre-cleaning temperature, pre-cleaning time, detergent concentration, main cleaning temperature, and main flushing time, recorded cleaning results for three weeks:Group test of initial procedure, Group test 1 of optimization procedure and Group test 2 of optimization procedure.Χ2 test was used to compare differences of the three groups and determine the optimum cycle. Results Group test 2 of optimization procedure had the highest visual inspection and ATP test qualification rate (both were 100.00%), and pass all the STF tests. Cleaning quality was significantly better than the other two groups, and the cycle made full use of the tested detergent. Conclusions Cycle parameters of cleaning machine have great impact on medical instruments cleaning quality; Specific consuming products need to be verified to determine the optimum cleaning cycle.