A 35-year-old Mexican American single mother presents to the emergency department extremely short of breath. She is only able to speak in short phrases in broken English and is extremely anxious. It...

A 35-year-old Mexican American single mother presents to the emergency department extremely

short of breath. She is only able to speak in short phrases in broken English and is extremely anxious. It is noted in her chart that she has been in the hospital three times in the past year for asthma exacerbations.

What are the key aspects of your physical examination, and what laboratory tests might you anticipate?