The main goal of a pulse-demand oxygen-delivery system is which of the following?
1. To provide oxygen only during expiration
2. To provide oxygen only during inspiration
3. To deliver oxygen to the patient only after a sufficient inspiratory effort is made and the de-mand valve opens
4. To deliver oxygen at a preset flow rate and close during inspiration to conserve oxygen
a. 1 and 3 c. 2 and 3
b. 2 and 4 d. 1 and 4
ANS: C
Pulse-demand oxygen-delivery systems deliver oxygen to the patient on demand only during in-spiration. Oxygen is delivered to the patient only after a sufficient inspiratory effort is made and the demand valve opens. The demand valve closes during exhalation to conserve oxygen.
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