AAAAA
Forum Fanatic
Topics: 153
Posts: 1,983
|
A 57-year-old woman is evaluated because of a 6-month history of progressive dyspnea. She has never smoked cigarettes. She has been treated on several occasions for a “COPD exacerbation” with intravenous corticosteroids, with some relief of symptoms.
She states that symptoms are particularly bothersome in the evening. Pulmonary function test results are as follows:
Laboratory Studies Forced expiratory volume in 1 sec (FEV1) 2.06 L
(84% of predicted) Forced vital capacity (FVC) 2.74 L
(83% of predicted) FEV1/FVC 75% Maximum voluntary ventilation 63 L/min
(65% of predicted) Maximum inspiratory pressure 39 cm H2O
(52% of predicted) Maximum expiratory pressure 58 cm H2O
(42% of predicted) Total lung capacity 4.01 L
(76% of predicted) Functional residual capacity 2.13 L
(72% of predicted) Residual volume 1.42 L
(73% of predicted) Diffusing lung capacity for carbon monoxide (DLco) 19.39 mL/min/mm Hg
(99% of predicted)
Which of the following is the most likely cause of this patient's dyspnea?
( A ) Chronic thromboembolic disease
( B ) Chronic obstructive pulmonary disease
( C ) Idiopathic pulmonary fibrosis
( D ) Myasthenia gravis
___________________
seeking study partner in USMLE examination
|
| drhouston
Forum Senior
Topics: 22
Posts: 63
|
C
|
| AAAAA
Forum Fanatic
Topics: 153
Posts: 1,983
|
Sorry. wrong answer, try again
___________________
seeking study partner in USMLE examination
|
| PGI2alpha
Forum Elite
Topics: 7
Posts: 447
|
myasthenia? coz of decreased inspiratory n expiratory pressures??
|
| Dr.D
Forum Senior
Topics: 22
Posts: 191
|
C
|
| peakock13
Forum Newbie
Topics: 0
Posts: 3
|
MG because her symptos are are more severe in the evening.
|
|
| |
| | | | | | |
