Aims : Monitoring patients in the ICU and other areas where the critically ill or unstable patient may be found (operating theatre, post-operative care unit, and emergency department) is a crucial skill for clinicians. This session will review basic principles and current technology of critical care monitoring, with a special focus on cardio-pulmonary monitoring. With this course, we hope that clinicians will better understand fundamental physiologic and theoretical principles of monitoring to enhance their ability to use clinical data and recognise where errors may occur. This course is taught at the “virtual bedside” using small groups and case-based scenarios.