A 12-year-old boy is brought to the Emergency Department wit…

A 12-year-old boy is brought to the Emergency Department with sudden onset of dyspnea with wheezing. The patient had a similar episode a month ago. An arterial blood gas shows hypoxemia, hypercapnia and acidosis. The chest X-ray shows clear lung fields. The most likely accompanying laboratory finding in this case would be:

A 28-year-old HIV (+) male patient presents to the ER compla…

A 28-year-old HIV (+) male patient presents to the ER complaining of shortness of breath, non-productive cough, and fever.  Vital signs for the patient are as follows:    T: 101°F (orally) BP: 110/70 (left arm, seated) HR: 118/min, regular RR: 26/min O2 saturation (room air): 88%             Lung examination reveals bibasilar rales, and is otherwise unremarkable.  Chest radiograph (CXR) demonstrates diffuse bilateral infiltrates, and arterial blood gas (ABG) reveals significant hypoxemia.  Based on this information, which of the following conditions is the most likely diagnosis for this patient?

During your Internal Medicine rotation, you are asked to int…

During your Internal Medicine rotation, you are asked to interpret pulmonary function test (PFT) results for the following patient: A 36-year-old male patient presents with a 3-week history of cough and chest tightness.  He has been waking up most nights with coughing, wheezing, and shortness of breath.  He states that his allergies (rhinitis and itchy eyes) are acting up.  He has never smoked.  His chest x-ray (CXR) is normal. FEV1 = 1.81L (65% predicted; normal range: 80%-120%) FVC = 3.38L (92% predicted: normal range: 80%-120%) FEV1/FVC = 0.54 (normal: > 0.7) Based on the above PFT data, the patient’s FEV1/FVC ratio is consistent with which of the following interpretations?