Hand Hygiene With Alcohol-Based Hand Rub: How Long Is Long Enough?

Area of Science:

• Infection Prevention and Control
• Microbiology
• Healthcare Epidemiology

Background:

• Hand hygiene is fundamental to preventing infections in healthcare settings.
• The precise optimal duration for effective hand-hygiene techniques is not well-established.
• This study investigates the impact of hand-rubbing duration on bacterial reduction.

Purpose of the Study:

• To evaluate how different hand-rubbing durations influence bacterial count reduction on healthcare personnel's hands.
• To compare the efficacy of shorter hand-rubbing durations against established protocols.

Main Methods:

• An experimental study followed European Norm 1500 guidelines.
• Healthcare personnel (HCP) used alcohol-based hand rub for varied durations (10-60 seconds) after contamination with E. coli.
• Bacterial counts were analyzed using a generalized linear mixed model, with 15 and 30-second durations specifically compared for non-inferiority.

Main Results:

• All tested hand-rubbing durations resulted in statistically significant reductions in bacterial counts (P<.001).
• Bacterial reductions after 10, 15, or 20 seconds were not significantly different from those achieved with 30 seconds.
• Hand rubbing for 15 seconds was demonstrated to be non-inferior to 30 seconds, with a mean difference of 0.11 log10 reduction.

Conclusions:

• Hand rubbing for 15 seconds is as effective as 30 seconds in reducing bacterial counts under the study's conditions.
• No additional benefit in bacterial reduction was observed for hand-rubbing durations exceeding 30 seconds.
• Further research is recommended to determine the clinical significance of these findings for infection control practices.