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Efficacy of flexible endoscope drying using novel endoscope test articles that allow direct visualization of the

Michelle Nerandzic¹, Kathleen Antloga¹, Christine Litto¹

¹Advanced Sterilization Group, Research and Development, STERIS Corporation, Mentor, OH.

American Journal of Infection Control

|September 5, 2020

Abstract

Background:

Thorough drying of flexible endoscope channels has been identified as an essential reprocessing step. Yet, instructions are not specific on how to dry endoscopes. There is lack of data supporting efficacy of current drying practices, due to limitations in determining channel dryness.

Methods:

Novel endoscope test articles were used to evaluate the effectiveness of alcohol flush and hanging in an ambient endoscope storage cabinet. Prepared test articles were hung in a storage cabinet for 5 days and visually inspected for residual liquid. The procedure for preoperative inspection of endoscopic systems was performed to determine the procedure's efficacy for removing residual liquid. Then, testing was performed to assess the impact of pressure, residual liquid type and route of air application on time to dry using compressed air.

Results:

Alcohol flush followed by hanging in an ambient storage cabinet was not effective for drying endoscope channels, and residual liquid was not completely removed after performing the steps of the preoperative inspection of endoscopic channels. The factors impacting effective compressed air drying were channel dependent. For some channels, alcohol increased the time to dry.

Conclusions:

Endoscope drying is complex; borescope evaluation does not ensure a dry device.

Keywords:

Alcohol flush Borescope Channel drying Compressed air Endoscope reprocessing Endoscope storage

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