Washer-disinfectors Part 4: Requirements and tests for
washer-disinfectors employing chemical disinfection for
thermo-labile endoscopes
1 Scope
This Part of ISO 15883 specifies the particular requirements, including performance, for washer-disinfectors
(WDs) that are intended to be used for cleaning and chemical disinfection of thermo-labile endoscopes.
This standard also specifies the performance requirements for the cleaning and disinfection of the washerdisinfector
and its components and accessories which may be required to achieve the necessary
performance.
The methods, instrumentation and instructions required for type testing, works testing, validation (installation,
operational and performance qualification on first installation), routine control and monitoring and re-validation,
periodically and after essential repairs, are also specified.
NOTE 1 In addition, Annex A gives guidance on an appropriate division of responsibility for the range of activities
covered in this Standard.
NOTE 2 WDs complying with this Part of ISO 15883 can also be used for cleaning and chemical disinfection of other
thermo-labile re-usable medical devices for which the device manufacturer has recommended this method of disinfection.
WDs complying with the requirements of this Part of ISO 15883 are not intended for cleaning and disinfection
of medical devices, including endoscopic accessories, which are heat stable and can be disinfected or
sterilized by thermal methods (see ISO/FDIS 15883-1:2005, 4.1.5).
The specified performance requirements of this Part of ISO 15883 may not ensure the inactivation or removal
of the causative agent(s) (prion protein) of Transmissible Spongiform Encephalopathies.
NOTE 3 If it is considered that prion protein may be present, particular care is needed in the choice of disinfectants and
cleaning agents to ensure that the chemicals used do not react with the prion protein in a manner that may inhibit its
removal or inactivation.
Washer-disinfectors Part 4: Requirements and tests forwasher-disinfectors employing chemical disinfection forthermo-labile endoscopes1 ScopeThis Part of ISO 15883 specifies the particular requirements, including performance, for washer-disinfectors(WDs) that are intended to be used for cleaning and chemical disinfection of thermo-labile endoscopes.This standard also specifies the performance requirements for the cleaning and disinfection of the washerdisinfectorand its components and accessories which may be required to achieve the necessaryperformance.The methods, instrumentation and instructions required for type testing, works testing, validation (installation,operational and performance qualification on first installation), routine control and monitoring and re-validation,periodically and after essential repairs, are also specified.NOTE 1 In addition, Annex A gives guidance on an appropriate division of responsibility for the range of activitiescovered in this Standard.NOTE 2 WDs complying with this Part of ISO 15883 can also be used for cleaning and chemical disinfection of otherthermo-labile re-usable medical devices for which the device manufacturer has recommended this method of disinfection.WDs complying with the requirements of this Part of ISO 15883 are not intended for cleaning and disinfectionof medical devices, including endoscopic accessories, which are heat stable and can be disinfected orsterilized by thermal methods (see ISO/FDIS 15883-1:2005, 4.1.5).The specified performance requirements of this Part of ISO 15883 may not ensure the inactivation or removalof the causative agent(s) (prion protein) of Transmissible Spongiform Encephalopathies.NOTE 3 If it is considered that prion protein may be present, particular care is needed in the choice of disinfectants andcleaning agents to ensure that the chemicals used do not react with the prion protein in a manner that may inhibit itsremoval or inactivation.
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