Venous blood gas results are pH 7.39, PvCO2 43 torr, PvO2 37torr, and SvO2 66%.
Calculate the patient's C(a-v)O2.
ANS 5% volume
4. What value for the apnea-hypopnea index (AHI) is consistent with mild
obstructive sleep apnea?
ANS 5 to 15
5. The respiratory therapist is asked to evaluate the presence of Auto-PEEP on a patient
receiving mechanical ventilation. In order to do this, what should theRT do?
ANS Initiate an expiratory hold just prior to the next ventilator-delivered breath
6. What do bronchial breath sounds heard over the lung periphery indicate?-
ANS lung consolidation (pneumonia)
Rationale
should be vesicular in periphery
7. A 60 kg (132 lb) patient is mechanically ventilated at the following settings
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VC, A/C; VT 500 mL, respiratory rate 12/min, FIO2 1.00 and 10 cm H2O PEEP.The
patient's peak airway pressure is 60 cm H2O and his SpO2 is 85%. A current chest x-ray
shows diffuse bilateral infiltrates. Which of the following is the most appropriate action
in order to reduce peak airway pressure?
A. Increase the frequency.
B. Change to airway pressure release ventilation.
C. Decrease the inspiratory time.
D. Increase PEEP to 15 cm H2O.
ANS B. Change to airway pressure release ventilation.
8. A 19-year-old patient is brought to the Emergency Department after takinga handful of
pills. The patient is obtunded but is making regular, sonorous respiratory efforts.
Auscultation reveals coarse rhonchi bilaterally. Which of
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the following should be done FIRST to assess this patient?
A. Obtain a sputum specimen.
B. Obtain an ABG.
C. Measure peak expiratory flow.
D. Determine the Glasgow Coma Score.
ANS B. Obtain an ABG.
9. A young healthy adult with complaints of intermittent wheezing is seen inthe
pulmonary clinic. A pre/post bronchodilator spirometry reveals a normalstudy with no
reversibility. Which of the following should the respiratory therapist recommend?
A. Helium dilution study
B. DLCO
C. Plethysmography
D. Bronchial provocation
ANS D. Bronchial provocation
10. Following abdominal surgery, a 70 year-old patient receives mechanical ventilation in
the ICU at the following settings
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