Storage cabinet design and infection prevention implications for long endoscopes

Area of Science:

• Medical Microbiology
• Infection Control
• Biomedical Engineering

Background:

• Inadequate drying of endoscope channels post-reprocessing promotes microbial growth, posing infection risks.
• This study investigates the impact of different endoscope storage cabinets and methods on residual moisture and bacterial contamination.

Purpose of the Study:

• To evaluate the effectiveness of active and passive drying cabinets in conjunction with various storage methods for endoscopes.
• To assess the influence of storage conditions on residual moisture levels and bacterial proliferation in endoscope channels.

Main Methods:

• EN-580T endoscopes were stored in active drying cabinets (TJ-908S, TJ-804S) and a passive drying cabinet (TM-804S).
• Storage configurations included full vertical suspension, partial suspension, and looped storage.
• Residual moisture was quantified at 24 and 48 hours, and bacterial contamination with Pseudomonas aeruginosa was assessed after storage.

Main Results:

• The TJ-908S cabinet with full vertical suspension showed significantly lower residual moisture (17.6–23.9 μL) compared to other conditions (278.5–518.7 μL).
• Bacterial cultures from endoscopes stored in TJ-908S exhibited minimal growth.
• Endoscopes stored in passive drying cabinets (TM-804S) and TJ-804S with partial or looped methods showed higher bacterial counts, with some exceeding 100 CFU.

Conclusions:

• Endoscope cabinet design and storage method critically impact drying efficiency and bacterial growth.
• Full vertical suspension within an active drying cabinet appears to be the most effective method for reducing contamination risk and enhancing endoscope reprocessing outcomes.