A motorcyclist after road traffic accident is having raised aerial pCO2 on ABG. Probable cause can be:
Damage to respiratory apparatus
Damage to respiratory centre
Damage to both respiratory apparatus and respiratory centre
Massive lung contusion alone
Answer- C. Damage to both respiratory apparatus and respiratory centre'Depression of the respiratory center by a variety of drugs, injury, or disease can produce respiratory acidosis.This may occur acutely with general anesthetics, sedatives, and head trauma or chronically with sedatives, alcohol, intracranial tumors, and the syndromes of sleep-disordered breathing including the primary alveolar and obesity-hypoventilation syndromes.'- Harrison I8/e p371