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RESPIRATORY CARE EXAM REVIEWED QUESTIONS WITH ANSWERS.
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RESPIRATORY CARE EXAM REVIEWEDQUESTIONS WITH ANSWERS.
A patient is receiving oxygen from an "E" cylinder at 4 L/min through a nasal cannula. The cylinder
pressure is 1900 psig. How long will the cylinder run until it is empty? ANS -2.2 hours
After setting up a partial rebreathing mask on a patient at a flow of 8 L/min, the reservoir bag collapses
before the patient finishes inspiring. The respiratory care practitioner should do which of the following?
-Change to a 6 L/min NC
-Decrease flow
-Change to a NRB
-Increase the flow ANS -Increase the flow
The following blood has levels have been obtained from a patient using a 60% aerosol mask; pH 7.47,
PaCO2 31, PaO2 58. What should the respiratory care practitioner recommend at this time? ANS -Place
the patient on CPAP
Given the following data, what is the patient's total arterial O2 content?
pH 7.41, PaCo2 37, PaO2 88, HCO 26, SaO2 95%, Hb 14 ANS -18 g/dL
A patient is using a 30% Venturi mask at an O2 flow of 5 L/min. The total flow delivered by this device is
which of the following?
-36 L/min
-45 L/min
-54 L/min
-60 L/min ANS -45 L/min
Name 3 examples of low-flow O2 delivery devices ANS -Simple mask, NC, NRB
,List 5 conditions that affect accuracy of pulse ox? ANS -Ambient light, nail polish, severe hypoxemia, skin
pigment, and temperature
List the 3 ventilator criteria that should be met by patients receiving O2 from low-flow devices ANS -
Consistent vent pattern, VT 300-700 mL, and RR < 25/min
The physician orders O2 therapy for a patient with a VT of 400 mL and Ti of 0.5 s. What flow must the
mask deliver to meet the patient's inspiratory demand? ANS -48 L/min
How does water in the aerosol tubing of a mask affect delivered FiO2? ANS -Increases FiO2
What does hydrostatic testing of cyclinders determine? ANS -wall stress, cylinder expansion, and leaks
What is the working pressure of cylinders? ANS -50 psi
Name 3 ways to determine if a flowmeter is pressure compensated? ANS -Labeling, needle located distal
to float (proximal to patient), and float jumps when plugged into wall (turned off)
List 3 indications for O2 therapy ANS -Hypoxemia, increased WOB, and increased myocardial work
Name 5 causes of hypoxemia ANS -inadequate FiO2, alveolar hypoventilation, V/Q mismatch, diffusion
defect, and anatomical shunt (right to left)
Secretions tend to become thicker if the inspired gas has what characteristics? ANS -Water content is
less than 44 mg/L at body temperature
After connecting a NC to the humidifier outlet, you kink the tubing and hear a whistling noise coming
from the humidifier. What has most likely caused this? ANS -The pop off valve has opened due to
excessive pressure and no leaks are present
, You notice that the patient's secretions have become thicker and more difficult to suction since
replacing the ventilator humidifier with a heat moisture exchanger. The respiratory therapist should
recommend; ANS -Replace the HME with a conventional heated humidifier
Which of the following are indications for bland aerosol therapy?
-Cough induction/sputum induction
-Improved mobilization of secretions
-Treatment of postextubation inflammation of the upper airway ANS --Cough induction/sputum
induction
-Improved mobilization of secretions
-Treatment of postextubation inflammation of the upper airway
You notice that very little mist is being produced by a nebulizer attached to an aerosol mask. Which of
the following could be responsible for this?
-Liter flow is too high
-Nebulizer jet is clogged with soap residue
-Capillary tube filter is obstructed ANS --Nebulizer jet is clogged with soap residue
-Capillary tube filter is obstructed
List 5 hazards of aerosol therapy; ANS -Bronchospasm, overhydration, overheating, tubing condensation,
contaminated water
How much of a humidity deficit exists when a patient inspires air holding 30 mg H20/L? ANS -14 mg/L
A clogged filter or capillary tube on a jet nebulizer has what effect on the operation of the device? ANS -
Decreased water output
List 5 clinical indications for aerosol therapy ANS -Improved secretion mobilization, increased delivery of
aerosolized medication, prevent dehydration, induce cough, relieve upper airway inflammation, and
hydrate airways
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