A full neurological exam is very important here as there can be small signs that can indicate the severity of this injury. Routine bloods can also be taken and in some patients, a coagulation screen or INR check may be indicated if the patient is on any anti-coagulants.
In most cases, there may be little to find on examination apart from drowsiness/reduced state of consciousness.
However, signs such as a sixth nerve palsy (inability to move eyes to lateral side), third nerve palsy (suggested by enlarged, fixed pupils) or irregularities in blood pressure or pulse may suggest a more serious state.
Fall from about 3m. No limb or chest injuries. Witnessed to hit head, confused.