CRNI Practice Exam 2025 – Complete Prep Guide

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What is the recommended duration for scrubbing with 70% alcohol using a twisting motion?

5 seconds

10 seconds

15 seconds

The recommended duration for scrubbing with 70% alcohol using a twisting motion is 15 seconds. This time frame is based on guidelines that emphasize the importance of effectively reducing microbial load on surfaces or skin prior to procedures such as catheter insertion or other sterile interventions. The contact time of 15 seconds with the alcohol solution allows for adequate penetration of the alcohol into the microbial cells, leading to cell death and thus a more effective disinfecting process.

This duration is critical because insufficient scrubbing time may not provide enough efficacy for the alcohol to fully disinfect the area, which can increase the risk of infection. Scrubbing in a twisting motion further enhances the mechanical action of cleaning, ensuring that any contaminants are dislodged and adequately exposed to the alcohol for optimal antimicrobial activity.

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