A 36 y/o female arrived in the ED with severe respiratory di…

A 36 y/o female arrived in the ED with severe respiratory distress. You note a marked barrel chest, digit-clubbing and accessory muscle usage. Breath sounds were absent in the bases with bilateral wheezing in the apices. She could not speak in full sentences. Which one of the following treatments would you choose for this patient? Pay attention to both the drug as well as the delivery method.