What is the patient’s fluid balance? How much oral intake are they having? What rate are their nasogastric feeds running at? What about their intravascular fluid replacement? Do they have a large urine output? Have they been vomiting or having large amounts of diarrhoea? Are there insensible losses such as extreme diaphoresis? When assessing the fluid status of a patient, the amount of fluid in versus the amount of fluid out tends to be the main focus. However, understanding where fluid may be sitting within the body is of utmost importance for us to optimally manage our patient’s fluid status.