Hozefa Ebrahim is an anaesthetist and intensivist at University Hospitals Birmingham, and college tutor for anaesthesia. He has written two previous anaesthetic exam practice books: Practice Single Best Answer Questions for the Final FRCA (Cambridge, 2012) and 1,000 Practice MTF MCQs for the Primary and Final FRCA (Cambridge, 2019). He is passionate about teaching postgraduate anaesthesia and ICM. This book is the culmination of many years of teaching physics. David Ashton-Cleary is a consultant in Critical Care and Anaesthesia at the Royal Cornwall Hospitals NHS Trust. He has a particular interest in medical education, and runs a number of specialist national training courses devoted to ultrasound in critical care, exam preparation and transfer medicine. He is also the author of two previous books: Key Clinical Topics in Anaesthesia (2014) and Recent Advances in Critical Care (2016).