Re: The location of the asthma?
There is no such thing as the 'lower trachea' as your trachea stops and splits somewhere around the second rib, or 2-3 inches above the nipple line. From there on it is not called the 'trachea', it's called the bronchus (bronchi, pl.)
As for asthma being at the 'top', the sensation of bronchospasm being so "high" in the chest can sometimes be attributed to vocal chord dysfunction (except that's more a throat-feeling than a chest-feeling) and also to a misunderstanding about how high up in your body your large airways actually are.
Besides, lungs are a lot like trees in that there's a branching and branching and branching action until the airways are microscopic nearly and the alveoli are microscopic surely. So at the uppermost point in your lungs you have 'deep' alveoli, just like you do at the lowermost point in your lungs.
Other than that I can't understand what she might possibly be getting at.