Operating Manual WD 425E
Rev. 1.1, LS Page 9 of 34 78563_E rev 1.1.doc
1.3.1 Pre-cleaning and Function Check
Immediately following endoscopy, all channels must be flushed in order to assure permeability. Surface-drying in
excess of 15 minutes must be avoided.
Instructions and operating provisions by the manufacturers must be followed.
In the recommendations by the RKI, see „Requirements for Hygiene in Processing flexible Endoscopes
and endoscopy auxiliary Instruments “ the following is suggested (excerpt).
Federal Health Flyer 2002- 45:395-411 (Springer Publishers 2002)
Machine borne processing with decontamination and disinfection units
1 Pre-cleaning
• Carry out pre-cleaning immediately following application.
• Already at the time of endoscope removal following the investigation, use a soft towel to wipe the insertion part,
thus removing coarse contamination objects.
• Dip distal end in a receptacle containing cleaning fluid, alternating operation of suction and air-water valves (if
feasible, operate cleaning valve). Suck cleaning fluid and air through the endoscope channels, thereby check-
ing for permeability and function of all channels.
• Finally, suck channels clean by air.
• Separate endoscopes from optical rinsing system, supply suction hoses as well from light source to bring them
to the processing area (haul in closed containers / bowls with lids).
2 Leak Test
• Attach water protective cap on video scopes to guard electrical contacts.
• Deposit endoscope in a bowl containing cleaning solution.
• Remove all valves and distal caps, place them in cleaning solution.
• Carry out leak test as per manufacturers’ instructions.
• In case of positive results of leak test (confirmed perforation), endoscope may not be further processed. The
outer mantle must be wiped with instrument disinfectant, i.e. Isopropanol 70% (is permitted by the manufac-
turer), the channels dried with compressed air, the endoscope wrapped in a protective film wrap, packed in
shipping case and handed over to the service station under marking „untight, not disinfected “.
3 Manual cleaning
• Mix up cleaning solution according to manufacturers’ instructions.
• Following leak test, immerse completely in cleaning solution.
• All cleaning steps must be carried out below the cleaning solution’s surface; this to prevent splashing of con-
taminated liquid.
• Use a lint-free one way towel to wipe the outer mantle of the endoscope.
• Use a suitable, soft brush to clean channel and valve openings, distal end and control elements.
• Bring Albaran lever of Duodenoscopes to middle position and use a suitable, soft brush to clean on al sides.
• For mechanical brush cleaning, use suitable, disinfected, flexible brush to brush clean all accessible channels
systems repeatedly until brush is pulled through without any new contaminants. Clean all valves and distal caps
using a soft brush.
• Using equipment specific adapters, connect all channels and rinsing connectors then flush with cleaning solu-
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