During the inspiratory phase of a Bird Mark 7, the:
a. valve will close.
b. valve rotates counterclockwise.
c. diaphragm moves toward the left com-partment.
d. diaphragm moves away from the left compartment.
ANS: D
During inspiration, negative pressure generated by the patient (along with atmospheric pressure in the left compartment) causes the diaphragm to move toward the right, away from the left com-partment. The valves are located on the Bennett PR series ventilators. At the beginning of exha-lation on the Bird Mark 7, the diaphragm moves toward the left compartment.
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