<prompt> A pt is brought to the emergency as a case of head injury, following a head on collision road traffic accident. His BP is 9060 mmHg. Tachycardia is present. Most likely diagnosis is:EDHSDHIntracranial hemorrhageIntraabdominal bleed  <response>: Answer is D Intraabdominal bleed : Although extradural haemorrhage is the most common intracranial complication following head injury, the patient in question is suffering from severe hypotension of 9060, has tachycardia, which cannot be explained by extradural haemorrhage alone. A patient with head injury, more than often has other significant injuries and a thorough examination of other systems therefore is a prime necessassity. An intraabdominal source of bleed, like a ruptured spleen for example is a more likely cause for hypotension in this patient. 