<prompt> The ideal treatment for hemothorax greater than 500mlhrwait and watchNeedle aspiratonIntercostal tubeOpen thoracotomy with ligation of vessels  <response>: Following are indications of thoracotomy in blunt chest trauma: Initial drainage of blood 1000 ml, especially if fresh. Continued brisk bleeding 100 ml15 minutes from the intercostal drain Continued bleeding of 200 mlhr for 3 hrs Rupture of bronchus, aoa, esophagus or diaphragm Cardiac tamponade if needle aspiration unsuccessful. Ref : Bailey Love 24e p872 