Why do chemical indicators and biological indicators pass when the cycle print out shows an aborted cycle?
One has to remember the data recorder that actually creates the print out does NOT control the cycle, but just records the data generated by sensors and air detectors located throughout and around the chamber. The cycle is controlled by the solenoid valve which controls the steam charges and vacuum pulses and the entire cycle including time temperature / pressure. In a sterilizer if an abort occurs, a micro chip over rides everything and takes the cycle immediately into the exhaust phase and then into the drying phase to finish the process, however, if the abort takes place during the holding time, the micro chip will stop the cycle and go to exhaust and drying, but BI’s, CI’s, and PCD’s may well have been exposed long enough to have completed the necessary color changes or kill, to show a pass condition as explained further in this paper.A cycle can abort in the conditioning phase, the pre-heat or come up phase, the holding time, the exhaust phase or the drying phase, because the defi
Related Questions
- Why do I have to use Biological Indicators (spore strips) instead of relying on the chemical indicators on my bags and tape?
- Why do chemical indicators and biological indicators pass when the cycle print out shows an aborted cycle?
- Where can I find tables showing the correspondance date / cycle and pass number?
