The sterilization effect evaluation of pulsating vacuum sterilizers is usually carried out through various methods to ensure the thoroughness and safety of sterilization. Here are some common evaluation methods, clearly explained in conjunction with the relevant information in the article:
1. B-D test method:
♦Method: Perform B-D test on the empty pot before sterilization every day. The test package is wrapped in a degreased cotton cloth, with a weight generally controlled at around 5kg. The dedicated B-D test chart is placed in the center of the test package and flat on the sterilization pot near the cabinet exhaust port.
♦Parameters: After three pulsations, the temperature is 134 ° C, the pressure is 0.2MPa, the time is 3.5 minutes, and the drying time is 8 minutes.
♦Result judgment: The test chart has turned black and uniform, indicating the elimination of airthoroughly, SteamPenetrating into the test package, the sterilization function is functioning normally, and it is considered qualified.
2. Physical monitoring:
♦The sterilizer is equipped with a pressure gauge that displays the pressure of the interlayer and the inner chamber, as well as a temperature gauge that displays the temperature of the inner chamber, allowing for intuitive observation of parameters such as pressure and temperature during the working process.
♦Sterilization parameter settings for dressing package: pulsation 3 times, sterilization temperature of 132 ° C, inner chamber interlayer pressure of 0.2MPa, sterilization time of 8 minutes, and drying time of 10 minutes.
♦By observing whether these parameters match the set values, the effectiveness of sterilization can be preliminarily judged.
3. Chemical monitoring:
♦Chemical tape method: Chemical indicator tape is attached to each package of items to be sterilized. Only when the specific sterilization time and temperature reach a set standard, can the stripes of the tape change color. But the discoloration of the tape can only indicate that the item has undergone the corresponding sterilization treatment, and cannot directly indicate whether the sterilization effect is qualified.
♦Chemical indicator card method: The chemical indicator card is placed in the center of the package of items that are difficult to sterilize and removed after sterilization is completed. Judging the sterilization effect based on the color change of the indicator card, a color change to black indicates that the sterilization effect is qualified, while a color lighter than black indicates that the sterilization effect is unqualified.
4. Other daily checks:
♦Whether the cabinet door and rubber ring are damaged, whether they are flat, and whether the door lock buckle is flexible and effective. Does the pressure gauge reach the "0" position when the steam is exhausted.
♦Pour 500ml of water into the exhaust port of the cabinet room to check for blockage:
♦Close the cabinet door and steam check for any air leaks.
♦Whether the steam regulating valve is flexible and accurate, and whether the pressure gauge and thermometer indicate the same condition.
♦Is the safety valve opened when the steam pressure reaches the specified safety limit.
Through the above comprehensive evaluation method, the sterilization effect of the pulsating vacuum sterilizer can be comprehensively evaluated to ensure the safety and reliability of the sterilized items.