Which source shall not be used to power the Venturi of a WAGD system?

The correct answer indicates that medical air should not be used to power the Venturi of a Waste Anesthetic Gas Disposal (WAGD) system. This is because the Venturi effect relies on a specific air pressure and flow dynamics that are typically not met by medical air in this context.

Venturi systems typically function by creating low pressure that draws gas through the system, and using medical air which is a mixture of nitrogen and oxygen could not only diminish the efficiency of this process but also risk contamination or interference with the anesthetic gases being evacuated. The presence of medical air could lead to an inadequate separation of gases or dilute the anesthetic gases, which could be harmful if not managed properly.

On the other hand, gases like oxygen and nitrous oxide have specific applications within the medical field that could be compatible with certain systems, but the requirements for the operation of a Venturi in a WAGD don't align with the use of medical air. Carbon dioxide is also more typically used in other contexts but not appropriate for powering a WAGD system either as it does not facilitate the Venturi process effectively.

Understanding the specific roles and functionalities of these gases in the medical system helps in grasping why medical air is excluded from selected uses in a