What should be the pH levels of the detergent used in manual cleaning?

The correct answer indicates that the detergent used in manual cleaning should have an alkaline pH, typically between 7-10. This is essential for several reasons when cleaning flexible endoscopes. Alkaline detergents are effective at breaking down biological matter, such as proteins and fats, which can be prevalent after procedures involving flexible endoscopes. These detergents help in emulsifying and removing contaminants more effectively than neutral or acidic options.

A neutral pH may not provide the necessary cleaning power needed to effectively remove all contaminants associated with medical instruments, especially those that have been exposed to complex biological materials. Similarly, while acidic detergents can be useful in certain applications, they are generally not as effective on the types of residues found on endoscopes. Highly alkaline detergents, while powerful, can potentially cause damage to the delicate materials of the endoscopes if not used correctly. Thus, the alkaline pH range of 7-10 strikes a balance by promoting effective cleaning while maintaining the integrity of the equipment.