CRT Practice Exam 2 Questions & Answers 2024/2025
1. All of the following are true statements regarding the use of an oropharyngeal airway EXCEPT:
a. An oropharyngeal airway that is too large may obstruct the airway
b. An oropharyngeal airway is contraindicated for use in unconscious patient...
1. All of the following are true statements regarding the use of an oropharyngeal airway EXCEPT:
a. An oropharyngeal airway that is too large may obstruct the airway
b. An oropharyngeal airway is contraindicated for use in unconscious patients
c. An oropharyngeal airway may induce gagging and vomiting
d. An oropharyngeal airway that is too small may obstruct the airway - ANSWERSANS: B.
EX: An oropharyngeal airway is NOT contraindicated for use in unconscious patients. Airway is not
contraindicated for use in an unconscious patient, only an alert patient. The distal tip of the
oropharyngeal airway may irritate the hypopharyngeal area and induce gagging and vomiting. If an
ororpharyngeal airway is too large the distal tip may obstruct the hypopharyngeal area, resulting in
airway obstruction. If an oropharyngeal airway is too small the distal tip may push the tongue the back of
the throat, resulting in airway obstruction.
2 Which of the following would the respiratory therapist normally observe if a conscious patient were
breathing in the assist/control mode of ventilator support?
1. A slight drop in pressure before each patient triggered breath
2. A fixed or constant length of expiration
3. a variable time interval between breaths
A. 2 only
B. 2 and 3 only
C. 1, 2, and 3
D. 1 and 3 only - ANSWERSANS: D
EX: 1. True - patient initiated breaths are normally observed by a slight dip in inspiratory pressure just
prior to the start of mechanical breath. 2. False - the length of expiration is variable. 3. True - with patient
initiated breaths mixed with timed breaths, the time interval would be variable between breaths, not
constant.
,3 An intubated mechanically ventilated asthmatic patient is struggling to initiate inspiration while in the
assist/control mode. Which of the following ventilator settings should the respiratory therapist first
check to determine the cause of this problem?
a. The pressure limit
b. The PEEP control
c. The tidal volume
d. The sensitivity - ANSWERSANS: D
EX: In this situation, the inspiratory threshold is set too low, adjustment of the sensitivity setting should
be done.
4 Which of the following would be an appropriate recommendation for an intubated mechanically
ventilated patient receiving an FIO2 of 0.80 and PEEP of 10cm H2O whose clinical condition begins to
improve as evidenced by chest x-ray , physical examination, and arterial blood gas values?
a. Lower the inspiratory flow rate
b. Decrease the ventilatory rate
c. Decrease the FIO2
d. Remove PEEP - ANSWERSANS: C
EX: In this situation an FIO2 of. 80 is unwarranted and should be lowered before adjusting any other
ventilatory parameter.
5 Which of the following breathing patterns help to optimize aerosol drug deposition of the deeper
recesses of the lungs?
1. Mouth breathing
2. Rapid, deep inspirations
3. Inspiratory pause
4. Pursed-lip breathing
A. 2 and 3 only
B. 1 and 2 only
C. 1, 3, and 4 only
D. 1, 2 ,3 and 4 - ANSWERSANS: C
,To optimize aerosol drug deposition to the deeper recesses of the lungs, a patient should be instructed
to take slow, deep inspirations through the mouth, pause at peak inspiration then slowly exhale trough
pursed lips.
6 Which of the following patients should the respiratory therapist recommend immediate intubation?
A. a patient experiencing an acute episode of bronchospasm
B. patient with thickened, retained secretions
C. patient with epiglottis
D. patient with post-extubation stridor - ANSWERSANS: C
EX: of the patient conditions listed, only epiglottitis, because of its life-threatening natured, requires
immediate intubation.
7 Which of the following factors will cause the FIO2 of the high-flow oxygen delivery device to decrease?
1. A shallow tidal volume
2. A decreased minute ventilation
3. A rapid respiratory rate
4. A malfunctioning air-entrainment port
a. 2 and 3 only
b. 1 and 4 only
c. 4 only
d. 1, 2, 3, and 4 - ANSWERSANS: C
EX: A shallow tidal volume, decreased minute ventilation, and a rapid respiratory rate will not affect the
oxygen delivery from a high-flow oxygen deliver y device while a malfunctioning air-entrainment port
can cause alterations in the oxygen delivery.
8 Digital clubbing is a common complication of all of the following diseases EXCEPT:
a. Cystic fibrosis
b. Bronchogenic carcinoma
c. Bronchiectasis
d. Chronic bronchitis - ANSWERSANS: D
, EX: Lung diseases which exhibit digital clubbing include: 1. Bronchogenic carcinoma, 2. Cystic fibrosis, 3.
Bronchiectasis, and 4. Lung abscess
9 Restrictive lung disorders include all of the following EXCEPT:
A. Pulmonary fibrosis
B. Sarcoidosis
C. Kyphoscoliosis
D. Cystic fibrosis - ANSWERSANS: D
EX: Sarcoidosis, Kyphoscoliosis, and pulmonary fibrosis are all restrictive type disorders while cystic
fibrosis is an obstructive disorder.
10 The following measurements were obtained from a 59-year-old patient:
Lung compliance: 0.2 L/cmH2O
Chest wall compliance: 0.2 L/cmH2O
Based on the above information, the Total Compliance would be which of the following?
A. 10 L/cmH2O
B. 20 L/cmH2O
C. 0.2 L/cmH2O
D. 0.1 L/cmH2O - ANSWERSANS: D
EX: The formula for calculating Total Compliance is:
Compliance is made up of lung compliance and chest compliance
--> 1/Ct = 1/Cl + 1/Ccw
* i.e. Summation of elastance (=1/compliance)
Thus, 1/Ct = 1/200 + 1/200
--> Ct = 100 mLs/cmH2O
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