A frostbitten extremity is usually:

A 13-year-old child is on a home ventilator. The parents called because the ventilator is malfunctioning and the child has increasing respiratory distress. You should:

Although the alveoli become enlarged, elderly people have difficulty expelling used air from the lungs because of:

Which of the following most accurately describes the position of the cerebellum within the skull?

A 38-year-old female sustained a high-velocity injury to her pelvis. Your assessment reveals severe pain and crepitation upon palpation of the iliac crests. Her blood pressure is 84/54 mm Hg, pulse is 120 and weak, and respirations are 26 breaths/min and unlabored. In addition to administering 100% oxygen, the most appropriate management should include:

When percussing the chest of a patient who experienced blunt chest trauma, you note hyperresonance on the left side of his chest. This suggests:

Shortly after returning to the surface of the water, a scuba diver experiences an acute onset of pleuritic chest pain and difficulty breathing. He is tachycardic, and his pulse is irregular. You should suspect:

What is the compression to ventilation ration for single rescuer adult CPR?

Spina bifida is most accurately defined as:

Approximately 2 weeks following a total hip replacement, a 70-year-old female complains of a sudden onset of dyspnea and pleuritic chest pain. Your assessment reveals perioral cyanosis, blood-tinged sputum, and wheezing to the base of her right lung. As your partner applies high-flow oxygen, the patient states that she has a history of hypertension. You should be most suspicious of: