Which of the following are appropriate volume goals for intermittent positive-pressure breathing (IPPB) therapy?
1. 10 to 15 ml/kg ideal body weight
2. At least 30% of the inspiratory capacity (IC)
3. Pressure level as high as 30 to 35 cm H2O
a. 1 and 3 only
b. 1 and 2 only
c. 2 and 3 only
d. 1 only
ANS: B
Most clinical centers strive to achieve an IPPB tidal volume of 10 to 15 ml/kg of body weight or at least 30% of the patient's predicted IC. If the initial volumes fall short of this goal and the pa-tient can tolerate it, the pressure is gradually raised until the goal is achieved. Pressures as high as 30 to 35 cm H2O may be needed to achieve this end when lung compliance is reduced.
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