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Comparison on the efficacy of disinfectants used in automated endoscope reprocessors: PHMB-DBAC versus orthophthalaldehyde

Authors
Kim S.Y.Lee H.S.Hyun J.J.Seo M.H.Yim S.Y.Oh H.Y.Kim H.S.Keum B.Seo Y.S.Kim Y.S.Jeen Y.T.Chun H.J.Um S.H.Kim C.D.Ryu H.S.
Issue Date
2011
Keywords
Disinfectants; Endoscope reprocessing; High-level disinfection
Citation
Clinical Endoscopy, v.44, no.2, pp.109 - 115
Indexed
SCOPUS
KCI
Journal Title
Clinical Endoscopy
Volume
44
Number
2
Start Page
109
End Page
115
URI
https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/14061
DOI
10.5946/ce.2011.44.2.109
ISSN
2234-2400
Abstract
Background/Aims: Since endoscopes are reusable apparatus classified as semicritical item, thorough reprocessing to achieve high-level disinfection is of utmost importance to prevent spread of infection. To improve disinfection efficacy and safety, disinfectants and endoscope reprocessors are continuously evolving. This study aimed to compare the efficacy of the combination of polyhexamethylenebiguanide hydrochloride-alkyldimethylbenzylammonium chloride (PHMB-DBAC) and orthophthalaldehyde (OPA) used respectively in ultrasonographic cleaning incorporated automated endoscope reprocessors: COOLENDO (APEX Korea) or OER-A (Olympus Optical). Methods: A total of 86 flexible upper endoscopes were randomly reprocessed with either COOLENDO/PHMB-DBAC or OER-A/OPA. Culture samplings were done at two sites (endoscope tip and working channel) which were later incubated on blood agar plate. Bacterial colonies were counted and identified. Results: The culture-positive rate at the endoscope tip and working channel was 0% and 2.33% for COOLENDO/PHMB-DBAC and 4.65% and 0% for OER-A/OPA. Staphylococcus hominis was cultured from one endoscope reprocessed with COOLENDO/PHMB-DBAC and Pseudomonas putida was isolated from two endoscopes reprocessed with OER-A/OPA. Conclusions: The reprocessing efficacy of COOLENDO/PHMB-DBAC was non-inferior to that of OER-A/OPA (p=0.032; confidence interval, -0.042 to 0.042). During the study period, significant side effect of PHMB-DBAC was not observed. © 2011 The Korean Society of Gastrointestinal Endoscopy.
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Ansan Hospital (Department of Gastroenterology and Hepatology, Ansan Hospital)
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