Over the next 2 hours,the infant develops marked intercostal indrawing,respiratory rate is 80 100 per minute,and breath sounds are decreased bilaterally. 0.70 oxygen is required to maintain saturations 89%. A repeat blood gas shows the following: Arterial blood gas in 0.70: pH 7.19 PaCO2 70 mm Hg Pa02 49 mm Hg HCO3 20 mmol What has happened? What is your next step? Over the next 2 hours, the infant develops marked intercostal indrawing, respiratory rate is 80 - 100 per minute, and breath sounds are decreased bilaterally. 0.70 oxygen is required to maintain saturations 89%. A repeat blood gas shows the following: What is your next step? Arterial blood gas in 0.70: pH 7.19 PaCO2 70 mm Hg PaO2 49 mm Hg HCO3 20 mmol What has happened?