A person suffers punctures in his chest cavity in an accident, without any damage to the lungs its effect could be

Options

A. Reduced breathing rate
B. Rapid increase in brathing rate
C. No change in respiration
D. Cessation of breathing

Answer

D

Explanation

When there is a puncture wound as that in the question the pleural cavity is exposed to the outer atomosphere normally there is always a negative pressure in the pleural cavity which helps to get the lungs inflated during inspiration but incase of such an injury the air is sucked in towards the pleural cavity through the wound leading to pneumothorax and the lungs will collapse thus the best option is (4)