a. CPR within a tactical or high-threat environment for victims of blast or penetrating trauma who have no pulse, no ventilations, and no other signs of life is not often successful

b. Bilateral needle decompression (See section 3) for MWDs suffering torso or polytrauma with no respirations or pulse should be performed to verify that tension pneumothorax is not the cause of cardiac arrest. This should be completed prior to determining if CPR should be initiated or continued