The easiest way to meet this requirement is by using a pass through AER which is built into the wall separating the clean and dirty areas of the MDRD. A pass through AER ensures that only clean endoscopes make their way over to the clean side for drying and storage. This approach is recommended in the ISO Requirements and tests for washer disinfectors
employing chemical disinfection for thermolabile endoscopes (ISO 15883-4:2008), which is the recognized standard in Europe.
Using a pass through AER like ARC's PT3AER can ensure a one-way workflow and limits the room for error in your MDRD, significantly reducing the chances of recontaminating an endoscope after completing the disinfection process.