An OEC candidate indicates that she understands the difference between a pneumothorax and a tension pneumothorax when she makes which of the following statements?
a. "A tension pneumothorax causes blood to accumulate around the lung; a pneumothorax involves the accumulation of air only around the lung."
b. "A tension pneumothorax can cause cardiac output to decrease; a pneumothorax does not."
c. "A pneumothorax describes a collapsed lung; a tension pneumothorax involves both a collapsed lung and blood loss."
d. "A pneumothorax is caused by a closed chest injury; a tension pneumothorax is caused by an open chest injury."
Answer: b
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