Calculate the airway resistance given the following clinical data: flow rate 60 L/min, peak inspir-atory pressure (PIP) 42 cm H2O, plateau pressure (Pplateau) 15 cm H2O, and positive end-expiratory pressure (PEEP) 5 cm H2O
a. 10 cm H2O/L/sec
b. 30 cm H2O/L/sec
c. 37 cm H2O/L/sec
d. 42 cm H2O/L/sec
ANS: B
60 L/min = 1 L/sec. Raw = (PIP − Pplateau)/(L/sec) = (42 − 15)/1 = 30 cm H2O/L/sec.
Health Professions
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