Correlation analysis between weight change of material packages and occurrence of wet packs after pressure steam sterilization
Objective To observe the weight change and occurrence of wet packs before and after pressure steam sterilization,so as to provide a basis for the judgment of wet packs.Methods A random block design was adopted to assemble the reusable orthopedic instruments to be sterilized in the orthopedics department of a hospital from August to October 2022.They were randomly packed with cotton cloth,non-woven fabrics,hard containers or new textile materials in accordance with the specifications,then the packs were sterilized by pressure steam.With the same procedure,weight of packs before sterilization and within 5 min after sterilization were weighed up.and wet packs were checked for after cooling for 30 min.All packs were repeatedly sterilized for 40 times,and the incidence rate of wet pack cases and the weight reduction rate after sterilization were calculated.Results There is no statistically significant difference among the four types of packaging materials in the incidence rate of wet pack cases after sterilization(χ2=3.490,P=0.322).Wet packs occurred in 26 cases after 160 sterilization operations,There were 13 cases with weight increasing and the weight increase rate was>0.2%in a case,while the weight of non-wet packages did not increase.The weight reduction rates of wet packs after sterilization in four types of materials packages were all smaller than those of non-wet packs(P<0.05).Conclusion There is no significant difference in the wet pack incidence rate of four packaging materials.Using the weight increase of the package after sterilization as a wet pack criterion still needs further exploration and verification.
packaging materialspressure steam sterilizationwet packscentral sterile supply department
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