Which of the following is a common mixture for helium/oxygen therapy?
A) 7%/93%
B) 20%/80%
C) 5%/95%
D) none of the above
B
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Your pregnant patient is in active labor. You note that her contractions are getting closer together and much stronger as the baby moves deeper into the birth canal. The muscle contraction mechanism that moves the baby toward birth is the same mechanism that moves:
A) fluid into and out of the cell. B) sweat to the surface of the skin. C) food from the esophagus to the stomach. D) air down the bronchial tubes to the alveoli.
A volume-cycled ventilator has a rate knob for setting the controlled frequency of breathing. If this control is set to 12/min, which of the following other settings will determine the inspiratory and expiratory times?
1. FiO2 2. Flow 3. Volume a. 1 and 2 only b. 1 and 3 only c. 2 and 3 only d. 1, 2, and 3