Taking your base value as a starting point, if you find that your lung capacity has declined to less than 80 %, this means your lungs and respiratory tract are already subject to spasmodic contraction and you need to increase your daily dosage.
以自己的基本值來做評估，如果肺活量不到基本值的百分之八十，表示肺部及氣管已有痙攣緊縮現象，平日的控制藥就需要增加。