Comparing the two Plan A’s, there are three differences:

1. The patient must be fully pre-oxygenated, allowing increased time to desaturation in the event of difficulties with intubation
2. The patient has a potential for gastric regurgitation or vomiting, leading to pulmonary aspiration. Cricoid pressure will be used at induction, to reduce the risk of aspiration
3. Cricoid pressure should be reduced or removed if it is impeding laryngoscopy

Fig 1 shows Scenario 2: Plan A. The highlighted areas are additional to the plan in Scenario 1.