The patient's lung has an air leak Correct Answer: You are called to the emergency department to help care for a patient who was in a vehicle accident and has chest injuries including broken ribs. Crepitations are felt while palpitating the patient's neck. What is most likely the cause of this? Reversible airway obstruction Correct Answer: A forced expiratory measurement obtained after the administration of a bronchodilator shows an increase in FEV1 from 60% to 80% of predicted. This indicates a: complete airway obstruction Correct Answer: During capnography monitoring of a mechanically ventilated patient, you note that the end-tidal PCO2 (PetCO2) has dropped to 0 mm Hg. This finding may indicate: inserting an esophageal-tracheal combitube Correct Answer: An unconscious apneic patient with a full stomach cannot be orally intubated in the emergency room. Which of the following would your recommend be? patients size and clinical condition Correct Answer: While establishing initial ventilatory support settings for a new patient, the most important consideration is the: Fever (hyperthermia) Correct Answer: A male patient has a lower than normal mixed venous O2 content. Which of the following is the most likely cause of this condition? apply 5-10 cm H20 pressure support Correct Answer: You are trying to wean an alert intubated patient off full ventilatory support using the CPAP protocol with 40% O2. Early in the initial effort her respiratory rate increases from 24 to 30/min and you start to observe some use of her accessory muscles while breathing. Which of the following would be your first action at this time? 70 minutes Correct Answer: What is the approximate duration of flow of an oxygen E-cylinder at 1000 psi running at 4 L/min?