Certified Endoscope Reprocessor (CER) Practice Exam

Purging the inner channels of endoscopes with air after rinsing, but before disinfection, is crucial for effective reprocessing. This step helps to remove any residual water from the channels, which ensures that the disinfectant can effectively contact the surfaces within the endoscope. Moisture can dilute the disinfectant's concentration and inhibit its effectiveness, potentially leaving the endoscope contaminated.

By purging with air, you also help to reduce the risk of biofilm formation and ensure that all surfaces are adequately dried before the disinfection process begins. This is essential for maintaining the integrity of the endoscope and ensuring patient safety.

Other methods, such as soaking in antiseptic solution or wiping with a sterile cloth, may not adequately dry the inner channels or could leave residues that interfere with the subsequent disinfection steps. Leaving the endoscope submerged in water is also not advisable, as it can contribute to microbial growth and may allow contaminant build-up.