TMC EXAM 2 EXAM 2024 AND PRACTICE
QUESTIONS |ACCURATE ANSWERS|
VERIFIED FOR GUARANTEED PASS
|GRADED A |NEW VERSION 100+
QUESTIONS
A patient with cystic fibrosis is receiving routine postural drainage and percussion. Which of the
following may be used to determine the effectiveness of therapy?
A. Sputum analysis
B. DLCO measurements
C. Chest radiograph
D. Arterial blood gas analysis
- ANSWER The correct answer is : C
Explanation : A chest radiograph, or x-ray, would be most helpful at determining the effectiveness of
the postural drainage and percussion therapy. Arterial blood gas assessment and sputum analysis are
too indirect to assess effectiveness. DLCO measurement is not related and not helpful.
While administering aerosolized bronchodilator with IPPB, the therapist notices the pressure
manometer has a significant negative deflection with each breath. The patient appears to be showing
signs of fatigue. The respiratory therapist should
A. decrease pressure
B. increase pressure
C. increase inspiratory flow rate
D. increase sensitivity
- ANSWER The correct answer is : D
,Explanation : When delivering an IPPB treatment, the respiratory therapist should monitor the
pressure manometer to see how much effort the patient must produce to trigger the machine to cycle
into inhalation. If a significant negative deflection of the needle is observed, the machine is not as
sensitive as it needs to be. Increasing sensitivity is appropriate.
Which of the following would be most helpful in evaluating partial paralysis of the vocal cords?
A. flow volume loop
B. forced vital capacity
C. infrared end-tidal CO2 detector
D. ventilatory response to CO2
- ANSWER The correct answer is : A
Explanation : Vocal cord paralysis and other fixed upper airway obstructions are best diagnosed by
doing a flow-volume loop pulmonary function test. If present, the flow-volume loop will be described
as "round" in shape. This is because a fixed obstruction causes an equal amount of resistance on both
inhalation and exhalation.
Over the last 2 hours, the respiratory therapist notices the peak pressure of a patient receiving volume
controlled mechanical ventilatory support has risen from 22 to 31 cm H2O. Plateau pressures have
remained steady at 14 cmH2O. Which of the following is the most likely explanation for these
changes?
A. reticulogranular changes on the chest radiograph
B. ARDS
C. pulmonary fibrosis
D. secretions in the airway
- ANSWER The correct answer is : D
Explanation : When peak pressures increase while plateau pressures remain virtually unchanged, the
most likely cause is a temporary condition such as secretions in the airway, bronchoconstriction,
occlusion of the endotracheal tube, etc. Pulmonary fibrosis and ARDS would cause a decrease in
pulmonary compliance manifested by an increase in plateau pressures.
,A patient has a balloon-tipped, flow-directed catheter in place in the pulmonary artery. Which
pressure can the respiratory therapist expect to obtain from the distal lumen?
A. CVP
B. PAP
C. MAP
D. SVR
- ANSWER The correct answer is : B
Explanation : Because the distal lumen of a pulmonary artery catheter is in the pulmonary artery, the
pressure monitored through that lumen is called the pulmonary artery pressure or PAP.
Which of the following do NOT contribute to total airway resistance for a mechanically ventilated
patient with an endotracheal tube?
A. bronchoconstriction
B. upper half of the trachea
C. endotracheal tube
D. main bronchi
- ANSWER The correct answer is : B
Explanation : Because the upper half the trachea is not communicating with the airway when an
endotracheal tube is in place, it does not contribute to total airway resistance. The endotracheal tube
cuff is inflated in the lower half of the trachea.
Which of the following data is needed to calculate minute alveolar ventilation?
A. IBW, VD/VT
B. PECO2, VT
, C. RSBI, VD/VT
D. RR, VT, weight in lbs
- ANSWER The correct answer is : D
Explanation : To calculate minute alveolar ventilation, three values must be known: the patient's
weight in pounds, tidal volume, and respiratory rate. Respiratory rate multiplied by tidal volume is
equal to minute ventilation. However, this question asks about minute ALVEOLAR ventilation. To
determine alveolar ventilation one must first take tidal volume and subtract the dead space portion of
each breath. That portion is estimated to be 1 mL per pound of ideal body weight. Once the dead
space is removed from the tidal volume the remaining value may be multiplied by the rate to get the
minute alveolar ventilation.
A febrile patient has the following blood gas results:
(results are not corrected for temperature)
pH 7.35
PaCO2 44 mmHg
PaO2 28 mmHg
HCO3- 24 mEq/L
BE 0 mEq/LO2
Sat 90%
Which of the following requires attention?
A. Severinghaus electrode
B. Sanz electrode
C. spectrophotometer
D. Clark electrode
- ANSWER The correct answer is : D
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