Where along the jet ventilator system does the airway pressure need to be measured for this measurement to be accurate?

A. distal to the jet injector
B. about 5 cm proximal to the jet injector
C. near the entrainment port
D. anywhere along the expiratory limb of the circuit

ANS: A
A. Correct response: Airway pressure must be measured distal to the jet injector for accuracy. In the diagram of a jet ventilator presented here, notice where the manometer for indicating airway pressure is located in relation to where the airway pressure is sensed. Also, observe where airway pressure is measured in relation to the distal portion of the injector.

B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A.