ATLS Key revision Questions and Correct Answers

Missed/associated injury with a displaced thoracic spine fracture? - thoracic aortic rupture Missed/associated injury of a posterior knee dislocation? - femoral fracture and posterior hip dislocation Missed/associated injury of a knee dislocation or displaced tibial plateau fracture? - Popliteal artery and nerve injuries Missed/associated injury of a calcaneal fracture? - Spine injury or fracture, tibial plateau fracture When are most extremity injuries appropriately dianogsed and managed? - During secondary survey Injury to which nerves causes wrist drop and foot drop? - radial and peroneal nerve respectively What is the normal ratio between the blood pressure at the ankle divided by that of an uninjured arm? - 0.9, if below, means potential injury exist. When testing sensation, what area of the body corresponds to C5? Which nerve is this? - The lateral aspect of the upper arm, the axillary nerve When testing sensation, what area of the body corresponds to C6? Which nerve is this? - Palmar aspect of the thum and index finger, median nerve When testing sensation, what area of the body corresponds to C7? - Palmar aspect of the long finger When testing sensation, what area of the body corresponds to C8? Which nerve? - Palmar aspect of the little finger, the ulnar nerve When testing sensation, what area of the body corresponds to T1? - Medial aspect of the forearm When testing sensation, what area of the body corresponds to L3? - Medial aspect of the thigh When testing sensation, what area of the body corresponds to L4? - Medial aspect of the lower leg, especially over the medial malleolus