Performance monitoring and effectiveness evaluation of pressure steam sterilizers in some hospitals in Henan province
Objective To understand the performance of pressure steam sterilizer and guide the use of pressure steam sterilizer.Methods The biological and physical parameters of pressure steam sterilizers in real time were monitored in 7 hospitals of randomly selected in Henan province.Perform statistical analysis on the data using SPSS 25.0.Results A total of 356 pressure steam sterilizers were monitored in 7 hospitals from 2016 to 2022.Biological monitoring was all qualified,with a total qualified rate of 100.00％.The sterilization temperature were qualified 331 times,with a total qualified rate of 92.98％.The difference M(P25,P75)between the minimum temperatue measured during the period of sterilization and the set temperature was 0.991(0.612,1.516)℃,and The difference M(P25,P75)between the maximum temperatue measured during the period of sterilization and the set temperature was 1.644(1.353,2.369)℃.The sterilization time was qualified for 189 times,with a total qualified rate of 53.09％.The percentage M(P25,P75)of actual sterilization time exceeding the set time was 10.00(4.86,17.75)％.The qualified rate of sterilization temperature in tertiary hospitals was 95.44％,higher than 87.21％in secondary hospitals(x2=7.127,P＜0.05).The qualified rate of sterilization time in tertiary hospitals was 52.09％,which had no statistical difference from 52.33％in secondary hospitals(x2=0.001,P＞0.05).The annual qualified rates of sterilization temperature from 2016 to 2022 were 79.66％,97.73％,86.36％,95.35％,100.00％,97.10％and 96.15％,respectively,and these annual qualified rates were not all the same(P＜0.05).The annual qualified rates of sterilization time from 2016 to 2022 were 49.15％,40.91％,43.18％,67.44％,64.44％,52.17％and 55.77％,respectively,and there was no statistical difference in these annual qualified rates(P＞0.05).The qualified rates of sterilization temperature and sterilization time of pressure steam sterilizers were no statistical difference in the three qualified rates(P＞0.05).Conclusions The qualification rate of sterilization time is relatively low.It is suggested to strengthen the management of pressure steam sterilizer and improve the accuracy of physical parameters of sterilizer on the premise of guaranteeing the sterilization effect.
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