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A series of questions and correct answers related to airway management and respiratory physiology for EMTs. It covers topics such as factors affecting carbon dioxide levels, signs of hypoxia, mechanics of inhalation and exhalation, use of supplemental oxygen, ventilation/perfusion mismatch, and passive ventilation during cardiac arrest.
Typology: Exams
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Which of the following would cause an increase in the amount of exhaled carbon dioxide? - Correct answer Increased cardiac output All of the following are signs of hypoxia except - Correct answer dehydration Inhalation occurs when the - Correct answer diaphragm and intercostal muscles contract and cause a decrease in intrathoracic pressure. Based on current guidelines in which of the following situations should supplemental oxygen be administered - Correct answer Exposure to carbon monoxide and an oxygen saturation of 95% A ventilation/perfusion mismatch occurs when. - Correct answer A disruption in blood flow inhibits the exchange of oxygen and carbon dioxide in the lungs even though the alveoli are filled with fresh oxygen Your protocols state that during the first few minutes of working on a cardiac arrest patient, you should provide passive ventilation. This means that you will: - Correct answer allow recoil of the chest between compressions to draw air into the lungs Which of the following factors will cause a decreased minute volume in an adult - Correct answer shallow breathing The main advantage of the Venturi mask is: - Correct answer the use of its fine adjustment capabilities in the long-term management of physiologically stable patients. Which of the following is a late sign of hypoxia - Correct answer cyanosis Central chemoreceptors located in the medulla provide feedback to increase the rate and depth of breathing when they sense: - Correct answer slight increases in carbon dioxide or a decrease in the pH of the cerebrospinal fluid.
While eating dinner, your partner suddenly grabs his throat and has a panicked look on his face. He has a weak cough, faint inspiratory stridor, and cyanosis around the lips. You should: - Correct answer stand behind him and administer abdominal thrusts. The partial pressure of oxygen in the alveoli is___ mm Hg while the partial pressure of carbon dioxide in the alveoli is ___ mm Hg - Correct answer 104, 40 The process of exchanging oxygen and carbon dioxide between the alveoli and blood of the capillaries is called - Correct answer external respiration Which of the following statements regarding oxygenation and ventilation is correct - Correct answer In mines or confined places, where oxygen levels are low, ventilation may continue despite adequate oxygenation. Which of the following oxygen flow meters is not affected by gravity and could be used in any position when attached to an oxygen cylinder - Correct answer Bourdon-gauge flowmeter The most significant complication associated with oropharnygeal suctioning is - Correct answer Hypoxia due to prolonged suction attempts The primary waste products of aerobic metabolism is - Correct answer Carbon dioxide Which of the following statements regarding the one person bag valve mask technique is correct - Correct answer Adequate tidal volume is often difficult to achieve when one EMT is operating the bag-valve mask. While providing CPAP to a patient in severe respiratory distress you note that his heart rate has increased by 20 breaths/minute. He is conscious but no longer following verbal commands. You should - Correct answer Remove the CPAP device and ventilate him with a BVM Complications associated with using a manually triggered ventilation device include - Correct answer lung tissue injury and gastric distention.
Suctioning the oral cavity of an adult should be accomplished within: - Correct answer 15 seconds Structures of the lower airway include all of the following, EXCEPT the: - Correct answer epiglottis A nasopharyngeal airway is inserted - Correct answer with the bevel facing the septum if inserted into the right nare Prior to applying a nonrebreathing mask to a patient you must ensure that the - Correct answer reservoir bag is fully inflated. The hypoxia drive is influenced by - Correct answer Low blood oxygen levels The proper technique for sizing an oropharyngeal airway before insertion is to measure the device from - Correct answer corner of the mouth to the earlobe. There diaphragm is innervated by the ___ nerve which allows it to contract
has decreased significantly from previous readings. You elevate the patient's legs, but this action has no effect. You should: - Correct answer Reduce the rate or volume of the ventilations you are delivering At a flow rate of 6 L/min a nasal cannula can deliver approximately __ oxygen concentration - Correct answer 44% An unconscious patient found in a prone position must be placed in a supine position in case he or she: - Correct answer requires CPR A 23-year-old male experienced severe head trauma after his motorcycle collided with an oncoming truck. He is unconscious, has rapid and shallow breathing, and has copious bloody secretions in his mouth. How should you manage his airway? - Correct answer Alternate 15 seconds of oral suctioning with 2 minutes of assisted ventilation. In contrast to inhalation, exhalation: - Correct answer is a passive process caused by increased intrathoracic pressure. You and your partner are caring for a critically injured patient. Your partner is controlling severe bleeding from the patient's lower extremities as you attempt ventilations with a bag-mask device. After repositioning the mask several times, you are unable to effectively ventilate the patient. You should: - Correct answer begin ventilations using the mouth-to-mask technique As the single EMT managing an apneic patient's airway, the preferred initial method of providing ventilations is the: - Correct answer mouth-to-mask technique with a one-way valve. Gas exchange in the lungs is facilitated by: - Correct answer adequate amounts of surfactant. The pressure of gas in a full cylinder of oxygen is approximately ___ psi - Correct answer 2000