Paediatricsniche
A 9-day-old term baby is brought to a rural emergency department pale, mottled and grunting after a day of poor feeding. He is afebrile. His heart rate is 190 and his respiratory rate 70; the liver edge is 3 cm below the costal margin and the femoral pulses cannot be felt. Oxygen saturation is 93 per cent on the right hand and 79 per cent on the left foot. Blood glucose is 3.9 mmol/L and the venous gas shows a metabolic acidosis. Which one of the following treatments matters most in the next few minutes?