Preparations and processes for cleaning and disinfecting endoscopes

US5223166A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Karlheinz Disch · Haan, DE
• Klaus Hachmann
• Klaus-Peter Bansemir · Langenfeld, DE

Key dates

• Filing date: Nov 26, 1990
• Grant date: Jun 29, 1993
• Expiry date: Nov 26, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/43
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In the cleaning and disinfection of endoscopes, the endoscope surfaces to be cleaned are successively PA0 a) brought into contact with a cleaning solution which is heated to 55.degree. to 65.degree. C., kept at that temperature for 1 to 15 minutes and then drained off and which contains a low-foam nonionic surfactant, a proteolytic enzyme, at least one complexing agent and, optionally, other standard detergent constituents, and has a pH value of from 6 to 8; PA0 b) brought into contact with a disinfectant solution which is heated to 55.degree. to 65.degree. C., kept at that temperature for 1 to 15 minutes and then separated off and which contains an aldehyde selected from the group consisting of formaldehyde and aliphatic C.sub.2 -C.sub.8 dialdehydes and at least one complexing agent, and has a pH value of from 6 to 8; PA0 c) washed at least twice with water of which the pH value is adjusted to pH 6-8, the water being heated to 55.degree. to 65.degree. C. at least in the final wash cycle; and PA0 d) dried with sterilized hot air at 55.degree. to 65.degree. C., water having a hardness of from 3.degree. to 8.degree. Gh being used in steps a) to c).