The most severe complication of a spinal cord injury is:

You respond to an 18 year old man who has been assaulted with a baseball bat. He was hit in the chest. He is unresponsive, apneic, and pulseless. This condition is most likely related to:

A. commotio cordis B. cardiac tamponade C. pneumonthorax D. traumatic asphyxia

A patient has had chronic ventilatory failure for several years. What is the primary factor that determines her breathing pattern?

a. Muscle efficiency b. Ventilatory efficiency c. Heart function d. Work efficiency