Certified Nurses Operating Room (CNOR) Practice Exam

What does a Bowie Dick test measure in the sterilization process?

1. Temperature and time

2. Presence of steam and residual air

3. Humidity and concentration

4. Biological load density

The correct answer is: Presence of steam and residual air

The Bowie Dick test specifically measures the presence of steam and residual air in the sterilization process, particularly in steam autoclaves. This test is essential because it confirms the effectiveness of the sterilization cycle by ensuring that steam can penetrate the sterilization load completely. The test utilizes indicator strips placed in a test pack that is subjected to a sterilization cycle. If steam is present and able to displace all residual air, the indicator will change colors, indicating that sterilization conditions have been met. Conversely, if there is residual air not replaced by steam, it can create cold spots where microorganisms could survive, leading to inadequate sterilization. While other factors like temperature and time are important for sterilization efficacy, the Bowie Dick test focuses specifically on the steam and air dynamics during the sterilization cycle. This makes it a critical test for ensuring that steam sterilizers are functioning properly.