The cleaning effect of deferent water temperatures on individual atomizer
SU Lidan1, YE Yuanyuan2,JIANG Xiaoqiong3, WANG Dan1, ZHANG Xueqing4, LU Xueqin5, WEN Hong2, CAI Fuman3
1.Department of Pediatrics, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China; 2.Department of Hospital Infection Control, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015,China; 3.RenJi College of Wenzhou Medical University, Wenzhou 325035, China; 4.Department of Laboratory,the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China; 5.Department of Endocrinology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
SU Lidan,YE Yuanyuan,JIANG Xiaoqiong, et al. The cleaning effect of deferent water temperatures on individual atomizer[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2021, 51(2): 150-154.
Abstract：Objective: To explore the effect of different temperatures of cleaning water on the removal of microorganism from the surface of inpatients’ atomizer. Methods: A randomized controlled trial was performed in the 120 children from the First Affiliated Hospital of Wenzhou Medical University by setting up one control group and three experimental groups according to the water temperature used for washing and soaking after atomization treatment. The water temperature of the control group was 15-25 ℃, and the three experimental groups were subdivided according to the different water temperature as group A (30-45 ℃), group B (50-60 ℃) and group C (> 90 ℃), with the rest part of washing routine strictly done following the normal washing guideline. On the day 1, 3, 5, 7 after the use of the atomizer, sample from the standby atomizer surface were submitted for inspection.According to the qualification standard that microbial colony is ≤20 cfu /piece and no pathogenic bacteria is detected, the pass rate of microbial samplings on the surface of atomizer was compared with the control in different use time and different groups. Results: After using the atomizer for 1 day, the pass rate of the control group was 96.7% and that of each test group was 100% (P>0.05). After using the atomizer for 3 days, the control combination
pass rate was 50.0%, the test combination pass rate was 66.7% in group A, 90% in group B and 100% in group C(P<0.001). After using the atomizer for 5 days, the control combination pass rate was 48.1%, the test combination pass rate was 53.6% in group A, 92.9% in group B and 100% in group C (P<0.001). After using the atomizer for 7 days, combined pass rate of the control group was 52.9%, and that of the experimental group was 50.0% in group A, 92.3% in group B and 100% in group C (P<0.01). Conclusion: With the increase of water temperature, the effective removal rate of residual microorganism on the surface of the atomizer was increased under conventional cleaning and preservation. The water temperature above 50 ℃ can effectively remove the residual microorganism on the surface of the atomizer and ensure the effective cleaning of the atomizer.
