This chapter discusses the anaesthetic management of the critically ill patient suffering from trauma or life-threatening illness. It begins by describing the principles of immediate trauma care, and the primary and secondary surveys. It then goes into more detail about head injuries, chest injuries, abdominal injuries, pelvic fractures, spinal injuries, limb injuries, burns, multiple trauma, post-cardiac arrest resuscitation care, and septic shock. It concludes by describing the transfer of the critically ill patient to the operating theatre or to another unit.