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You have a patient who comes into the emergency room with severe emphysema for which he has never had any medical treatment.
You have a patient who comes into the emergency room with severe emphysema for which he has never had any medical treatment. Assume that alveolar ventilation in this patient is below normal and that the patient's increased airway resistance has caused hypoventilation. [Hint: see page 397 of the Course Pack for a description of hypoventilation.]
Which of the following would be likely in this patient with severe, long-standing, untreated emphysema?
A) systemic arterial PCO2 below 40 mmHg B) decreased residual volume compared to normal C) more difficulty "filling the lungs" than "emptying them" D) systemic arterial PO2 above 100 mmHg E) forced expiratory volume in 1 second to vital capacity (FEV1/VC) less than 80%
