Influence of pretreatment and moisturizing measures based on feedforward control on cleaning efficiency of metal instruments

Objective To explore the influence of pretreatment and moisturizing measures based on feedforward control on cleaning efficiency of metal instruments. Methods A total of 2 000 samples were obtained from 250 samples in 8 experiments. Every time after blood staining, 250 samples were randomly divided into groups A, B, C, D and E. Group A was processed with purified water, group B was processed with 1∶200 diluted multi enzyme cleaning solution, group C was processed with 1∶200 diluted alkaline cleaning agent, group D was processed with soaking moisturizing gel, and group E was processed with no moisturizing pretreatment. The results of visual inspection and occult blood test(OB test)were compared between the five groups after moisturizing pretreatment for 4 and 24 h. Results The qualified rates of visual cleaning of instrument surface in groups A, B, C and D were significantly higher than those in group E after 4 h of moisturizing pretreatment, and the qualified rates of visual cleaning and OB test of instrument inner wall in groups B, C and D were significantly higher than those in groups A and E(P<0.05 or P<0.01). The qualified rates of visual cleaning of instrument surface in groups A, B, C and D were significantly higher than that in group E after 24 h of moisturizing pretreatment, and the qualified rates of visual cleaning and OB test of instrument inner wall in group D were significantly higher than those in groups A, B and C(P<0.05 or P<0.01). Conclusion The foam enzyme pretreatment agent has the best cleaning effect after moisturizing. The alkaline cleaner and enzyme cleaner have better cleaning effect after moisturizing treatment - in a short time, and the cleaning effect of pure water moisturizing treatment is not good.