13.8歲男童,120cm,23kg,有氣喘病史,長期使用fenoterol metered aerosol 100 mcg IH PRN。今因氣喘急性發作,血氧飽和度降至94%,入急診治療,下列何者為急性處置首選?
A.aminophylline injection,loading dose 5.7 mg/kg IF 30 min,then 1 mg/kg/hr cIF,再依theophylline blood concentration調整劑量
B.salbutamol sulfate nebules 2.5 mg IH Q20min,for 3 doses
C.epinephrine 2 mg SC Q20min,for 3 doses
D.salmeterol xinafoate / fluticasone propionate evohaler 250/25 mcg 2 puffs IH PRN,Q2H,max 12 doses/day