STERILIZATION CYCLES – DRY HEAT STERILIZER

ST — 110
STERILIZATION CYCLES – DRY HEAT STERILIZER


Equipment: Double door dry heat sterilizer with mounted HEPA filter module.

Temp. required for sterilization : 220 ºC
& Depyrogenation

Time of cycle : 90 min. at 220 ºC

Set temperature : 260 ºC

Time : Validated time depending on load

PROCEDURE – (NON STERILE SIDE)

1. Remove the lock and open the pressure lock door by turning the handle anti-clockwise, till the quick throw handle could be easily pushed down.
2. Unload the carriage on the trolley provided.
3. Check working of the alarm system when the door is opened. If not, report to the supervisor or engineering department.
4. Wipe and clean the carriage and the chamber of the dry heat sterilizer with distilled water.
5. Place systematically the load to be sterilized as per the loading pattern on the carriage and put the carriage back into the chamber of the dry heat sterilizer.
6. Close the pressure lock door, by pulling up the quick throw handle and turn the handle clockwise till the door is tight and display ‘‘DO NOT OPEN’’ board on the door
7. Fill the sterilization card provided stating date, items sterilized, time, no. of units and operators.
8. Put ‘ON’ the mains and check working of the booster fan and the HEPA module.
9. Put ‘ON’ the panel switch on ‘AUTO’.
10. Affix a thermograph duly labeled on to the validated set time depending upon the load to be sterilized.
11. Set the temperature to 260 ºC on the temperature controller unit.
12. Set the timer on the temperature controller unit to the validated set time depending upon the load to be sterilized.
13. Start the ‘Heater’ switch and simultaneously start the ‘Timer’ switch. The heater timer display and the HEPA timer display should start with ‘ZERO’ readings.
14. Check the current in all the three phase of the heater with the aid of the built in ammeter switch (ammeter reading should be between 35-38 amperes for each phase).
15. Check the thermograph, the thermograph recorder and the ink flow through the thermograph recorder.
16. The temperature will gradually rise and will be indicated by the temperature indicator and the thermograph.
17. After the sterilization cycle is completed, the heater will stop and the HEPA module will start to cool the load, the starting of the HEPA module will be indicated on the Magnehelic Gauge provided and the time will be indicated on the HEPA timer.
18. Prior to unloading the charge on the sterile side check the following
a. Thermograph has recorded the desired time and temperature relationship.
b. HEPA module is operating
c. Plenum pressure on the Magnehelic gauges of the HEPA module and record the same.
d. Load is sufficiently cool to be unloaded on the sterile side.
19. Initial the sterilization card and release the load for unloading in the sterile area for filling of sterile products.
20. Indicate on the load, date of sterilization and the date before which it should be used.