<prompt> Which of the following is M.C. cause of hypotension in fracture ribs T10T12-Abdominal solid visceral organ injuryInjury to aoaInter costal aery damagePulmonary contusion  <response>: Ans is a ie Abdominal solid viscera injury Most common cause of hypotension in trauma pt. is due to haemorrhage. The blood loss may be external and obvious, or internal and cove or combination of both. The fracture of the lower ribs T9 - T12are usually associated with splenic or hepatic injuries and the fracture of upper ribs T1-T3, clavicle or scapula are associated with major vascular injuries. 