Which indicators confirm proper sterilization in an autoclave?

• A. The Cycle Completes On Time.
• B. Proper Tape/Chemical Indicator On The Load And A Validated Biological Indicator (Spore Test) With A Printout Record.
• C. Visual Inspection Only.
• D. The Operator's Intuition.

Answer: (B)

The idea being tested is that proving sterilization worked requires objective evidence, not just that a cycle ran. A chemical indicator on the load shows the cycle reached the expected parameters (such as temperature and exposure), but it doesn’t prove that the contents are actually sterile. The definitive evidence comes from a validated biological indicator, typically a spore test, which uses highly resistant microorganisms to test the sterilization process. If the biological indicator shows no growth after incubation, it demonstrates that the process achieved the necessary lethality. The printout record provides traceable documentation of the cycle and its results, which is essential for quality control. Merely finishing the cycle on time, relying on visual inspection, or trusting intuition do not offer reliable proof of sterility.