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 19 April 2018

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News

Strongly acidic electrolyzed water may be useful as an endoscope disinfectant

Strongly acidic electrolyzed water is a valuable disinfectant for endoscopes, as it is a potent bactericidal agent and is environmentally safe, claim researchers from Japan.

News image

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The team evaluated strongly acidic electrolyzed water (SAEW) as a disinfectant of endoscopes, and published the results in the latest issue of Digestive Endoscopy.

Glutaraldehyde is currently considered to be the best disinfectant for endoscope disinfection.

However, glutaraldehyde poses high risks for medical staff involved in the process and also to the environment.

Upper GI endoscopes and colonoscopes were experimentally contaminated through the aspiration channel of the scopes.

They were contaminated with Pseudomonas aeruginosa, Mycobacterium avium, and hepatitis B surface antigen positive blood.

SAEW completely disinfected endoscopes of:
- Pseudomonas
- HBV
Digestive Endoscopy

Four disinfection methods were tested. These were manual washing only, soaking in 3% glutaraldehyde for 5 and 10 minutes, and a 10-second soak in SAEW with 50 or 100 ml of aspiration.

Direct plating culture was positive for Pseudomononas contamination after manual washing only and after a 5-minute soak in 3% glutaraldehyde.

Complete disinfection of Pseudomonas and hepatitis B surface antigen positive blood on the contaminated upper GI endoscope was obtained after a 10-minute soak in glutaraldehyde and after using SAEW.

This was confirmed by enrichment culture and polymerase chain reaction (PCR).

The researchers found that Mycobacterum avium are rather resistant against SAEW, as determined by broth culture and PCR.

Yukihiro Sakurai, of the Kanto Medical Center, Tokyo, concluded on behalf of fellow authors, "Strongly acidic electrolyzed water is a valuable disinfectant for endoscopes."

Dig Endosc 2002; 14 (2): 61-6
15 July 2002

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