Production & Quality
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PEI Medical Sterilization Discoloration
Fenómeno do problema
PEI medical devices change color after multiple sterilizations; although color stability is relatively good, batch difference complaints still occur.
Análise das causas
PEI can withstand more than 1000 steam sterilization cycles and maintains good color stability over hundreds of sterilization cycles; but differences in sterilization methods and over-limit parameters still have an impact; gamma, ethylene oxide, and vaporized hydrogen peroxide each have their own characteristics.
Solução
①Verify color stability according to the sterilization method; ②execute sterilization parameters in a standardized manner; ③batch color sampling inspection; ④record and manage the number of sterilization cycles.; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusão principal
The thousand-cycle-level sterilization tolerance of PEI medical parts is an advantage; method differences must be verified separately; cycle records support life management.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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