What would be the treatment of choice of the following blood…

What would be the treatment of choice of the following blood gas reading: pH is 7.15, PaCO2 is 80 mm Hg, and HCO3- is 26 mEq/L for this patient who has a long history of COPD, RR= 36/minute exhibits accessory muscle use, CXR reveals cardiomegaly with bibasilar pneumonia and has become lethargic?