Tracheostomy inner cannula care: a randomized crossover study of two decontamination procedures

Area of Science:

• Infection Control
• Medical Device Decontamination
• Respiratory Care

Background:

• Current inner cannula decontamination methods lack scientific basis, relying on tradition.
• A need exists for evidence-based, practical, and safe decontamination protocols.
• This study addresses the gap in scientific data for tracheostomy inner cannula cleaning.

Purpose of the Study:

• To compare the efficacy of two decontamination methods for tracheostomy inner cannulae.
• To identify a practical and safe decontamination procedure.
• To provide scientific data supporting clinical practice.

Main Methods:

• A randomized, single-blinded, comparative crossover study was conducted.
• Fifty outpatients with long-term tracheostomy were included.
• Bacterial cultures assessed decontamination effectiveness before and after using detergent and chlorhexidine-alcohol or detergent alone.

Main Results:

• Inner cannulae harbored significant bacterial growth prior to decontamination.
• Both tested methods resulted in near-complete organism elimination.
• The equivalence criterion (ratio of mean colony counts >0.8) was met (P<0.001), indicating comparable efficacy.

Conclusions:

• Simple cleaning with detergent and water is sufficient for effective tracheostomy inner cannula decontamination.
• Chlorhexidine-alcohol offers no significant additional benefit over detergent alone.
• Evidence-based practice supports using detergent and water for routine decontamination.