A 34-year-old woman presents in the emergency department with tachypnea and shortness of breath of acute onset. Increased airway resistance corrected for lung volumeġ64. Decreased forced expiratory volume exhaled in 1 second (FEV 1)/forced vital capacity (FVC)Į. Decreased diffusing capacity of the lungĬ. Which of the following laboratory values is consistent with her diagnosis?Ī. She is referred for pulmonary function testing to assess the progression of her disease. A 68-year-old woman with pulmonary fibrosis presents with a complaint of increasing dyspnea while performing activities of daily living. The measured values of Pa O 2 and Pa CO 2 will accurately reflect the actual values.ġ63. The measured Pa O 2 will be lower and the measured Pa CO 2 will be higher than the patient’s actual blood gas values.Į. The measured Pa O 2 will be higher and the measured Pa CO 2 will be lower than the patient’s actual blood gas values.ĭ. The measured values of both Pa O 2 and Pa CO 2 will be lower than the patient’s actual values.Ĭ. The measured values of both Pa O 2 and Pa CO 2 will be higher than the patient’s actual values.ī. How does exposure to room air affect the measured values of P O 2 and P CO 2 in arterial blood?Ī. After the first-year resident obtains an arterial blood sample from the patient, the glass plunger slides back, drawing an air bubble into the syringe before it is handed to the blood gas technician for analysis. Arterial blood gases are ordered while the patient is breathing room air. A 28-year-old man is admitted to the emergency department with multiple fractures suffered in a car accident. With a barometric pressure of 380 mm Hg at this altitude, what would be the resulting P O 2 of the dry inspired air?ġ62. After arriving at the airport in Bolivia, they hiked to a remote mountain village in the Andes at an elevation of 18,000 ft. A group of third-year medical students accompanied a medical mission team to Peru, South America.
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