A pulmonary thromboembolus most commonly produces respiratory compromise by causing:
Correct answer: B. Obstruction of pulmonary blood flow
- A. Excessive bronchial mucus secretion
- B. Obstruction of pulmonary blood flow
- C. Collapse of the tracheal rings
- D. Permanent enlargement of alveoli
Explanation
A thromboembolus blocks pulmonary arteries and reduces perfusion to ventilated regions of the lung. This creates ventilation-perfusion imbalance and may cause acute respiratory distress or sudden death.
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Covers the causes and mechanisms of disease, cellular injury, inflammation, healing, circulatory disturbances, neoplasia and disorders of major organs. It also includes gross and microscopic pathological changes, specimen interpretation and the distinction between aetiology, pathogenesis, clinical signs and lesions.
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