A 50 years old lady, who has a known diagnosis of bronchial asthma, presented to the AIIMS emergency with complaints of severe breathlessness, diaphoresis and wheezing. On examination, you find that the patient is conscious with a respiratory rate of 30 per minute, blood pressure of 96/64 mm Hg and a pulse rate of 144 per minute. An aerial blood gas analysis showed a pH of 7.2, p02 of 50 mm Hg and pCO, of 70 mm Hg. How will you manage the patient?