What is a major concern when delivering a positive-pressure breath to the lungs of a patient who has distribution inhomogeneities?
A. overdistention of healthy lung units
B. overdistention of apical alveoli
C. underaeration of basal alveoli
D. maldistribution of pulmonary perfusion
?ANS: A
A. Correct response: Distribution in homogeneities is a major factor in creating regional overdistention of normal alveoli during a positive-pressure breath, which can cause overinflation of these alveoli. Overinflation can cause barotraumas or volutrauma.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A.
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