Application Analysis on Physical Parameter Monitoring in Pre-Vacuum Pressure Steam Sterilizer Using a Temperature-Pressure Measurement Device

ObjectiveThis study aims to explore the application of a temperature-pressure measurement device for real-time monitoring of physical parameters in pre-vacuum steam sterilizers by analyzing critical parameters and evaluating sterilizer performance, thereby ensuring sterilization effectiveness and providing a scientific basis for the physical monitoring practice of sterilizers.MethodsUsing calibrated temperature-pressure detectors and 7 kg simulated test packs, real-time monitoring of physical parameters for three pre-vacuum steam sterilizers was conducted every two months under both full-load and partial-load conditions from January 2024 to March 2025. Parameters recorded included mean sterilization temperature, maximum and minimum sterilization temperatures, temperature uniformity, sterilization time, equilibrium time, sterilization hold time, and sterilization pressure. These were compared against preset sterilization parameter standards, and the causes of data deviations were analyzed.ResultsA total of 50 monitoring and re-testing sessions were conducted on the three sterilizers, of which 20 sessions were under partial load (14 qualified; qualification rate of 70%) and 30 were under full load (28 qualified; qualification rate of 93.33%), resulting in an overall qualification rate of 84%. Among the eight unqualified sessions, one session had a temperature exceeding 137℃, one session had a temperature below 134℃, eight sessions had an equilibrium time exceeding 30 seconds, and four sessions had temperature uniformity >2℃.ConclusionThe temperature-pressure measurement device can detect physical parameters of pre-vacuum steam sterilizers. Deviations in the sterilization process can be promptly identified and corrected through real-time monitoring and recording of critical parameters, ensuring that sterilization effectiveness meets standards. Differences were observed compared to the standard 4 kg test pack. It is recommended to incorporate this device into the routine sterilizer monitoring system to strengthen medical safety.