Shelf Life of Sterile Small Surgical Instruments Packaged in Double Linen Versus Plastic-paper Wraps
Abstract
Background: In most operating theaters, unused sterile instruments have to be re-sterilized according to current practice protocols in order to guarantee that they are safe. Protocols of different institutions differ and they are hardly based on strong scientific evidence. Recently, the use of plastic-paper wrappers has been claimed to extend the sterility time significantly.
Objective: This study was aimed to compare safe sterility time of small stainless steel instruments packaged in plastic-paper versus linen wrappers.
Material and Methods: Two groups of orthopedic screws, each containing 360 screws, were sterilized by autoclaving at the same time and kept in an open shelf in the operating room. In Group 1, each screw was packaged in a double-wrapped linen pack. Screws in Group 2 were individually packaged in an inner wrap of paper and an outer plastics paper envelope commercially available. Group 3 served as control for the reliability of the microbiology laboratory. Twenty screws were picked up from each study group for up to 52 weeks and sent for biological culture. Two screws from Group 3 were also sent to the laboratory at the same time.
Results: Up to the study period of 52 weeks, no growth was cultured from any sample in Groups 1 and 2. All but 4 samples in Group 3 grew several bacteria.
Conclusion: For small metal instruments, autoclaved packages in double wrapped linen and in double wrapped plastic-paper combination could both be stored safely for at least 52 weeks in open shelves when the storage condition was favorable in operating rooms provided that the package remained intact. Current routine practice of re-sterilization might have to be revised.
References
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