Acute Caremiddle twist
A 63-year-old man collapses in an emergency department waiting room. He is shocked once for ventricular fibrillation and a palpable pulse returns after four minutes of resuscitation. He remains unresponsive and is being ventilated by bag and mask on 15 L/min of oxygen while the intensive care registrar is called. His blood pressure is 104/62 mmHg and the pulse oximeter reads 100 per cent. Which one of the following saturation ranges should now be targeted?