Effect of fully automatic cleaning and sterilizing machine on cleaning,disinfection and drying of tubular instruments
OBJECTIVE To investigate the drying effect of tubular instruments in automatic cleaning and sterilizing machine.METHODS Totally 2 000 pieces of luminal instruments used from Jun.to Sep.2023 were selected as the study subjects of this experiment,and were placed in the automatic cleaning and disinfecting machine for cleaning,disinfecting,and drying according to the routine operation.The instruments were then randomly divided into four groups of A,B,C,and D,with 500 pieces of instruments in each group,and the drying times was 15,25,35,and 45 minutes,respectively.After the completion of the treatment,the drying effect of the external surface and the inner lumen of each instrument,including critical components,was visually inspected and checked by a lumen instrument testing workstation.The drying pass rates of the external surface and the inner lumen of each treat-ment were counted,the pass rate of both the external and internal lumen including the key parts was examined be-tween each treatment and in the same treatment,and the location of the moisture residue on the top of the instru-ment was also counted.RESULTS There was no significant difference in the qualification rate of surface drying in the four groups.The internal drying qualification rate of the instrument lumen in group A was lower than that in groups B,C,and D(P＜0.05),and the difference in groups B,C,and D was not significant.There was statisti-cal significant difference in the drying qualification rate between the external surface and the internal lumen in group A,while there was no significant difference in groups B,C,and D.At the same time,the proportion of moisture residue occurred at the valve and thread of the instrument was the highest compared to other parts of the body(P＜0.05),and an extension of the drying time could improve the drying effect of this part to a certain ex-tent.CONCLUSION The inner lumen of the instrument was more difficult to be dried than the outer surface,in the case of the drying temperature remains unchanged,the appropriate extension of the drying time to a certain extent could improve the qualification rate of the drying of the inner lumen of the instruments.The valve and thread com-ponents were the parts of the instrument that were prone to water retention,and the drying process should be spe-cially designed for the special structure of the instrument.
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