Objective  To compare the effects of different pretreatment methods for cleaning overnight surgical instruments.

  Methods  A total of 420 contaminated surgical instruments, such as bone-biting forceps, lumen instruments and dental instruments in January 2018 were selected as study objects, and were randomly divided into observation group(n=210) and control group(n=210). The surgical instruments in the control group were directly placed in the closed instrument recycling box, while those in the observation group were washed with clean water, sprayed with moisturizing agent on the surface, and then placed in the closed instrument recycling box. The instruments of two groups were sent to the disinfection supply center for cleaning at the same time next day, and the qualified rates of the two groups were compared.

  Results  The qualified rates of cleaning surgical instruments such as lumen and teeth instruments, tumor removal forceps, bone-biting forceps and biopsy forceps in the observation group were significantly higher than that in the control group(P < 0.05).

  Conclusion  Pretreatment and cleaning for overnight operating room instruments can effectively improve the qualified rate, improve the quality of cleaning, and effectively reduce the difficulty of equipment cleaning.