How often should autoclaves be tested?

• A. Daily
• B. Weekly
• C. Monthly
• D. Yearly

Answer: (B)

Autoclave validation must be done on a regular schedule to confirm that the sterilization cycle actually achieves the required level of microbial kill. Relying on a single check or on what a display shows isn’t enough because equipment can drift, fail seals, or lose efficacy without obvious symptoms.

In practice, daily checks of the cycle parameters (temperature, pressure) and internal chemical indicators are used to verify that each load ran under the correct conditions. However, these quick checks do not prove that the sterilization process is consistently effective over time. To reliably confirm that the autoclave is functioning properly, weekly biological indicators (spore tests) are performed. This weekly validation catches issues early and ensures ongoing patient/client safety.

Less frequent testing, like monthly or yearly, risks allowing a malfunction to go undetected for too long, which is not acceptable in environments where sterilization matters. Daily checks are important but do not replace the need for weekly biological testing. Therefore, weekly autoclave testing is the best choice.