An infection preventionist observing the technologist in sterile processing load the washer-disinfector or washer-decontaminator should expect to see them:
A.
Fill the load with mixed items to maximize efficiency.
B.
Put the heaviest items on the top rack of the washer.
C.
Disassemble instruments and open hinged instruments.
D.
Place fresh surgical instruments from the case cart directly onto the rack.
Proper loading of a washer-disinfector is designed to maximize detergent and water contact with all instrument surfaces and internal features. CDC guidance for cleaning and sterilizing practices specifically notes that hinged instruments should be opened fully and items with removable parts should be disassembled (unless the manufacturer provides validated instructions indicating otherwise). This ensures the cleaning solution can reach high-risk areas such as box locks, joints, and crevices, which are common sites for retained soil and bioburden.
The other options describe practices that can compromise cleaning effectiveness and safety. “Filling the load with mixed items to maximize efficiency” (A) risks improper positioning, shadowing, and inadequate exposure of surfaces to spray action and detergent. Placing the heaviest items on the top rack (B) is contrary to common reprocessing guidance, which generally places heavier sets lower to prevent damage and to support effective spray patterns.
Finally, instruments should not be taken “directly from the case cart” onto the rack (D) without appropriate sorting/preparation and following the device manufacturer’s instructions for use (IFU), including opening, disassembly, and correct placement in trays/baskets. The expected best practice during loading is therefore disassemble instruments and open hinged instruments
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