A 19-year-old woman presents with episodic cough, wheezing, and chest tightness worsening with exercise and seasonal pollen exposure. Current vital signs show BP 118/76, HR 102, RR 22, SpO2 92% on room air. Chest auscultation reveals end-expiratory wheeze; heart sounds normal. Between episodes, physical examination is unremarkable. FEV1/FVC ratio is 0.68 during symptoms. She denies fever and productive sputum. Pulmonary function testing during current symptoms is most likely to show which of the following?
- A)Increased residual volume with no bronchodilator response and smoking history
- B)Decreased total lung capacity with reduced compliance
- C)Normal FEV1 to FVC ratio and markedly increased diffusion capacity
- D)Decreased peak expiratory flow due to upper airway obstruction from epiglottitis
- E)Decreased FEV1 to FVC ratio with improvement after bronchodilator useGABARITO
Explicação
Decreased FEV1 to FVC ratio with improvement after bronchodilator use is correct. Asthma is a reversible obstructive lung disease caused by airway hyperresponsiveness and inflammation. Bronchodilator responsiveness and episodic triggers such as exercise and po... Ver explicação completa e trilha adaptativa →