Oregon Certified Nursing Assistant State Practice Exam

When washing hands, how long should an NA use friction?

1. A. At least 25 seconds

2. B. At least 20 seconds

3. C. At least 15 seconds

4. D. At least 5 seconds

The correct answer is: B. At least 20 seconds

Using friction while washing hands for at least 20 seconds is essential for effectively removing dirt, bacteria, and germs from the skin. This duration has been established based on research indicating that a minimum of 20 seconds provides sufficient time for the mechanical action of rubbing, which aids in dislodging contaminants and enhances the microbiological effect of the soap. Handwashing involves not just the application of soap and water, but also the action of rubbing all surfaces of the hands, including the backs of the hands, between the fingers, and under the nails. The 20-second recommendation is advocated by health organizations to optimize cleanliness and infection prevention. Shorter durations, such as those indicated by other options, do not allow for adequate friction and may result in ineffective hand hygiene. Proper handwashing is a critical component in reducing the spread of infections, especially in healthcare settings, where Certified Nursing Assistants often work.