NIC Esthetician Written ExamSafety and Infection ControlMedium
A salon uses an EPA-registered disinfectant that requires a 10-minute contact time. If an esthetician prepares the solution at 9:00 AM, and it has a 24-hour efficacy period, what is the latest time the solution can be used for effective disinfection?
- A9:00 AM the next day, provided it's not visibly soiled.
- B9:00 PM the same day, regardless of soiling.
- CImmediately after 9:10 AM, only if it's a fresh mix.
- DIt can be used indefinitely until it becomes cloudy.
Show answer & explanationAnswer & explanation
Correct answer: A. 9:00 AM the next day, provided it's not visibly soiled.
The efficacy period for disinfectants, once mixed, is critical. With a 24-hour efficacy, the solution can be used until 9:00 AM the following day, as long as it remains clean and unsoiled. Visible soiling would require immediate disposal and fresh preparation.
Why the other options are wrong
- B. 9:00 PM the same day is incorrect; 24 hours means until 9:00 AM the next day.
- C. The contact time (10 min) is for the tool to be immersed, not for the solution's shelf life.
- D. Disinfectants have a limited efficacy period and should not be used indefinitely, even if clear. Visible soiling also necessitates immediate disposal.
Disinfectant Efficacy Period
The length of time a mixed disinfectant solution remains effective and capable of killing pathogens, as stated by the manufacturer.
- Often 24 hours, but can vary (e.g., daily, weekly).
- Must be discarded immediately if visibly soiled with debris or blood.
- Always follow manufacturer's instructions for mixing and disposal.
- Using expired or soiled disinfectant nullifies its effectiveness.
Memory trick: Time and cleanliness dictate disinfectant's prime.