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Does the Reprocessing of Endoscopes Have to Take Place Immediately after Pre-Cleaning? A First Evaluation

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Background/Aims: The recommendations on the time interval between pre-cleaning and reprocessing of endoscopes differin international guidelines, with a low level of evidence. The aim of this study was to investigate the influence of postponingreprocessing on the reprocessing quality after pre-cleaning the flexible endoscopes. Methods: We reprocessed 124 standardized test tubes simulating endoscope channels after soiling and contamination anddetermined the reprocessing performance. In addition, we examined contaminated gastroscopes, colonoscopes, and bronchoscopes. The duration of interim storage after pre-cleaning was 16 h for 100 test tubes and up to 24 h for 18 endoscopes. We determined theresidual protein content and germ load as markers for cleaning and disinfection performance. In addition, we determined biofilmformation by photometry of crystal violet staining. Results: All test tubes and flexible endoscopes showed residual protein content and germ load significantly below legally prescribedthreshold values, independent of the interval between pre-cleaning and reprocessing. Conclusions: Our findings indicate that flexible endoscopes could be stored overnight after pre-cleaning without any influence onthe quality of reprocessing. While ensuring patient safety, this could simplify logistical processes and enable cost savings.

Abstract

Background/Aims: The recommendations on the time interval between pre-cleaning and reprocessing of endoscopes differin international guidelines, with a low level of evidence. The aim of this study was to investigate the influence of postponingreprocessing on the reprocessing quality after pre-cleaning the flexible endoscopes. Methods: We reprocessed 124 standardized test tubes simulating endoscope channels after soiling and contamination anddetermined the reprocessing performance. In addition, we examined contaminated gastroscopes, colonoscopes, and bronchoscopes. The duration of interim storage after pre-cleaning was 16 h for 100 test tubes and up to 24 h for 18 endoscopes. We determined theresidual protein content and germ load as markers for cleaning and disinfection performance. In addition, we determined biofilmformation by photometry of crystal violet staining. Results: All test tubes and flexible endoscopes showed residual protein content and germ load significantly below legally prescribedthreshold values, independent of the interval between pre-cleaning and reprocessing. Conclusions: Our findings indicate that flexible endoscopes could be stored overnight after pre-cleaning without any influence onthe quality of reprocessing. While ensuring patient safety, this could simplify logistical processes and enable cost savings.

참고문헌 (35)

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