WITH ANSWERS GRADED A+
✔✔The partial pressure of oxygen in the alveoli is _______ mm Hg, while the partial
pressure of carbon dioxide in the alveoli is _______ mm Hg.
70, 28
88, 30
90, 50
104, 40 - ✔✔104, 40
✔✔The main advantage of the Venturi mask is:
the ability to adjust the percentage of inspired oxygen when caring for a critically ill or
injured patient.
the use of its fine adjustment capabilities in the long-term management of
physiologically stable patients.
that it does not contain an oxygen reservoir, so the same percentage of oxygen can
consistently be administered.
the ability to adjust the amount of oxygen administered to the patient by increasing the
flow rate on the regulator. - ✔✔the use of its fine adjustment capabilities in the long-
term management of physiologically stable patients.
✔✔Tidal volume is defined as the volume of air that:
is moved through the lungs in a single minute.
moves into or out of the lungs in a single breath.
remains in the lungs following a complete exhalation.
is forced into the lungs as a result of positive pressure. - ✔✔moves into or out of the
lungs in a single breath.
✔✔Central chemoreceptors located in the medulla provide feedback to increase the
rate and depth of breathing when they sense:
slight increases in carbon dioxide or a decrease in the pH of the cerebrospinal fluid.
slight decreases in carbon dioxide and an increase in the pH of the cerebrospinal fluid.
,decreased levels of oxygen in the blood and an increase in the pH of the cerebrospinal
fluid.
increased levels of oxygen in the blood and a decrease in the pH of the cerebrospinal
fluid. - ✔✔slight increases in carbon dioxide or a decrease in the pH of the
cerebrospinal fluid.
✔✔You have inserted an oral airway and are ventilating an apneic woman with a bag-
valve mask. She suddenly begins regurgitating large amounts of vomit. You should:
perform a finger sweep of her mouth.
insert a nasal airway and then suction her mouth.
roll her onto her side and remove the oral airway.
remove the oral airway and suction her oropharynx. - ✔✔roll her onto her side and
remove the oral airway.
✔✔While providing CPAP to a patient in severe respiratory distress, you note that his
heart rate has increased by 20 beats/min. He is conscious, but is no longer following
verbal commands. You should:
decrease the amount of pressure that the CPAP device is delivering.
remove the CPAP device and ventilate him with a bag-valve mask.
increase the amount of pressure that the CPAP device is delivering.
remove the CPAP device and apply oxygen by nonrebreathing mask. - ✔✔remove the
CPAP device and ventilate him with a bag-valve mask.
✔✔Which of the following statements regarding breathing adequacy is correct?
Patients with a grossly irregular breathing pattern usually do not require assisted
ventilation.
The single most reliable sign of breathing adequacy in the adult is his or her respiratory
rate.
Patients breathing shallowly may require assisted ventilation despite a normal
respiratory rate.
, A patient with slow respirations and adequate depth will experience an increase in
minute volume. - ✔✔Patients breathing shallowly may require assisted ventilation
despite a normal respiratory rate.
✔✔You are ventilating an apneic woman with a bag-valve mask. She has dentures,
which are tight fitting. Adequate chest rise is present with each ventilation, and the
patient's oxygen saturation reads 96%. When you reassess the patency of her airway,
you note that her dentures are now loose, although your ventilations are still producing
adequate chest rise. You should:
remove her dentures, resume ventilations, and assess for adequate chest rise.
attempt to replace her dentures so that they fit tightly and resume ventilations.
leave her dentures in place, but carefully monitor her for an airway obstruction.
remove her dentures at once and increase the rate and volume of your ventilations. -
✔✔remove her dentures, resume ventilations, and assess for adequate chest rise.
✔✔How does CPAP improve oxygenation and ventilation in patients with certain
respiratory problems?
It forces the alveoli open and pushes oxygen across the alveolar membrane.
It pushes thick, infected pulmonary secretions into isolated areas of the lung.
It decreases intrathoracic pressure, which allows more room for lung expansion.
It prevents alveolar collapse by pushing air into the lungs during inhalation. - ✔✔It
forces the alveoli open and pushes oxygen across the alveolar membrane.
✔✔The primary waste product of aerobic metabolism is:
lactic acid.
pyruvic acid.
carbon dioxide.
adenosine triphosphate. - ✔✔carbon dioxide.
✔✔As the single EMT managing an apneic patient's airway, the preferred initial method
of providing ventilations is the:
mouth-to-mouth technique.