07-28-2016, 09:08 AM
A 57-year-old woman comes to the physician because of a 3-month history of cough. She says that the cough has increased in frequency during the past 4 weeks and that she coughed up blood-tinged sputum once. She has not had any other symptoms. She has no history of serious illness and takes no medications. She has smoked one pack of cigarettes daily for 40 years. She is 160 cm (5 ft 3 in) tall and weighs 66 kg (145 lb); BMI is 26 kg/rn2. Coarse rhonchi are heard over the right lung base. A chest x-ray shows a 3-cm mass near the hilum of the right lung. A biopsy specimen of the mass obtained via bronchoscopy shows non-small cell carcinoma of the right main stem bronchus. mediastinoscopy and PET scan show no rnetastatic disease. Preoperative testing shows:
FEy1 for the left lung 600 mL Maximum voluntary ventilation (MW) 50% of predicted
Diffusion capacity of the lung for carbon monoxide (DLCO) 50% of predicted
Arterial blood gas analysis on room air shows:
Pco2 44 mm Hg
75mm Hg
Which of the following parameters is likely to be most useful in assessing this patient’s postoperative risk for pneumonectomy?
A) Arterial blood Pco2
B) Arterial blood Po2
C) DLCO
D) FEy1
E) MW
FEy1 for the left lung 600 mL Maximum voluntary ventilation (MW) 50% of predicted
Diffusion capacity of the lung for carbon monoxide (DLCO) 50% of predicted
Arterial blood gas analysis on room air shows:
Pco2 44 mm Hg
75mm Hg
Which of the following parameters is likely to be most useful in assessing this patient’s postoperative risk for pneumonectomy?
A) Arterial blood Pco2
B) Arterial blood Po2
C) DLCO
D) FEy1
E) MW