TNCC Clinical Pearls Exam Questions with Accurate Answers

KE - ANSWER-Speed increases energy by the square of the velocity and can influence the extent of injury. However, the action of stopping must also be considered. Speed increases the risk of injury, but energy transfer occurs during the "stop," when energy is exerted and applied to the tissues upon impact. (pp. 12) Blunt Trauma - ANSWER-Because blunt trauma may often appear less obvious, with minimal to no outward signs of injury as compared to other mechanisms or types of injuries, it's severity may be dismissed initially, resulting with in delayed treatment and increased complications. (pp. 13) Rollover Collisions w/ Ejection - ANSWER-Ejection from the vehicle significantly increases the probability of fatal injury (pp. 16) Velocity and KE are positively correlated with destruction - ANSWER-KE increases with velocity. Therefore, although velocity is relative, it is the projectile's KE that causes damage by transferring energy to the tissue (pp.18) Cavitation - ANSWER-Cavitation can also be seen when an unrestrained driver hits a steering wheel. As the chest pushes inward from the resistance of the steering wheel, a temporary cavity is created (pp.19) Explosion - ANSWER-The explosion that occurs in an enclosed space has an increase in pressure relative to the explosion that occurs in an open environment. The increased pressure compounds the blast effects, and potentially increases internal and external injury severity. (pp. 21) AVPU - ANSWER-A: alert and oriented V: responds to verbal stimuli P: responds only to painful stimuli U: unresponsive