A 25-year-old female presents with a 2-day history of nausea and upper abdominal pain. She is a previously well lady with no significant medical history. However, she has had a severe toothache for 1 week and has been taking painkillers for 1 week.
A 38 years old man with recent past history of treated hypertension and depression is transferred to your ICU from operating theatre. He had been undergoing shoulder arthroscopy under general anaesthesia.