<prompt> A pt developed haemoperitoneum following A, with BP 9060 pulse 140min which of the following to be done ?DPL to be doneLiver is the MC organ to ruptureUSG is better than CT ScanX-ray to be taken in supine position  <response>: Ans is c i.e. USG is better than CT-Scan The aim of investigations in blunt abd. trauma is to decide whether exploratory laprotomy is to be done or not. In this pt. its already known that he has hemoperitoneum, so there is no need of DPL. He needs an urgent laprotomy to look for injuries manage them accordingly. USG is better than CT scan for the evaluation of blunt abd. trauma patients as US is easily available and performed bed side. It accurately detects the intrabdominal free fluid and thats all that is needed for the moment. It also simultaneously assesses the pleural and pericardial cavities. Though CT is more sensitive specific and provides many additional information which cannot be assessed by US like evaluation of retroperitoneum, assessment of renal perfusion it takes time, pt. has to be shifted to CT unit, needs experienced radiologist, is much more expensive. So it is used in stable patients only for fuher evaluation after an US. 