Which source shall NOT be used to power the venturi of a WAGD system?

Which source shall NOT be used to power the venturi of a WAGD system?

• A. Medical air
• B. Water
• C. Instrument air
• D. Inert gas

Answer: (A)

The venturi in a WAGD system relies on a driving gas to create suction and entrain ambient waste gas into the scavenging line. That driving gas must be free of anesthetic vapors and other contaminants to avoid reintroducing waste gas into the environment. Medical air should not be used as the driving source because it can carry trace anesthetic vapors from the hospital gas supply. Introducing any anesthetic-laden gas into the venturi drive could contaminate the exhaust and increase occupational exposure, undermining the purpose of the scavenging system. In contrast, instrument air or an inert gas are typically filtered and kept free of anesthetic vapors, making them appropriate driving sources. Water, while it can create suction in other contexts, is not used to power a venturi in WAGD due to moisture, contamination, and system design considerations.

The venturi in a WAGD system relies on a driving gas to create suction and entrain ambient waste gas into the scavenging line. That driving gas must be free of anesthetic vapors and other contaminants to avoid reintroducing waste gas into the environment.

Medical air should not be used as the driving source because it can carry trace anesthetic vapors from the hospital gas supply. Introducing any anesthetic-laden gas into the venturi drive could contaminate the exhaust and increase occupational exposure, undermining the purpose of the scavenging system. In contrast, instrument air or an inert gas are typically filtered and kept free of anesthetic vapors, making them appropriate driving sources. Water, while it can create suction in other contexts, is not used to power a venturi in WAGD due to moisture, contamination, and system design considerations.