TNCC Practice Exam with Rationales

When obtaining a history for an injured patient, understanding the kinematic concepts associated with the mechanism of injury and energy transfer can initially assist the trauma provider in: - ANSWER-evaluating and anticipating the types of injuries that may be present rationale: mechanism of injury and energy transfer can assist the provider in evaluating and anticipating damage the major preventable cause of death in the trauma patient is: - ANSWER-uncontrolled hemorrhage rationale: uncontrolled hemorrhage is the major cause of preventable death after injury, so assessment to identify uncontrolled hemorrhage is key to the initial assessment process the across-the-room observation step in the initial assessment provides the opportunity to - ANSWER-reprioritize circulation before airway or breathing rationale: the across-the-room observation is done at the beginning of the primary survey to rapidly assess the need to reprioritize circulation before airway or breathing. This is done if uncontrolled external hemorrhage is identified. Which of the following accurately describes ventilation prinicples associated with a bag-mask device? - ANSWER-ventilate at a rate of 10-12 breaths/minute rationale: if ventilation is ineffective, assist ventilation at 10-12 breaths/minute or one every 5-6 seconds Which of the following is the best measure of the adequacy of cellular perfusion and helps to predict the outcome of resuscitation? - ANSWER-base deficit rationale: base deficit serves as an endpoint measurement of the adequacy of cellular perfusion and when used in conjunction with serum lactate helps predict the success of resuciation