Your patient was injured when his airbag deployed during a head-on collision. He complains of acute pain when breathing and has trouble catching his breath. Your physical exam reveals a flail segment on the left side of his chest. You recognize that a flail segment can be a life threat because:
A) it can greatly decrease his tidal volume. B) he has an open chest injury.
C) he likely has an accompanying head injury. D) this increases his chances of infection.
Question 2
Why is inhalation described as an active process?
A) It requires chest muscles to relax and use energy to move, creating a positive pressure.
B) It requires chest muscles to contract and use energy to move, creating a negative pressure.
C) It requires the diaphragm to relax and use energy to move, creating a positive pressure.
D) It uses oxygen to assist chest muscles to contract, creating a negative pressure.
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