A patient who is 72 hours postoperative repair of ...

Adult CCRN/PCCN Certification Practice Test

Question Number 7

A patient who is 72 hours postoperative repair of a bowel obstruction suddenly demonstrates shortness of breath and his respiratory rate increases from 22 to 45/min. His SpO2 went from 95% to 88% acutely. An arterial blood gas sample obtained while the patient is receiving oxygen via a nasal cannula at 6L/min reveals the following results:pH 7.40pCO2 27pO2 50A chest x-ray is obtained and a "ground-glass-like appearance" is reported. Auscultation of the lungs reveals diffuse crackles that were not present previously.Your patient is currently on a ventilator with the following settings: AC, FiO2 100%, Rate of 12, Tidal Volume 450, PEEP of 5. His arterial blood gas results are the following: pH 7.36, PaCO2 43, PaO2 56, HCO3 28. Which ventilator parameter do you anticipate changing?

A. Decrease the FiO2

B. Increase the tidal volume

C. Increase the PEEP

D. Increase the rate

✔ Correct Answer:

C. Increase the PEEP

Adult CCRN/PCCN Certification Practice Test

Question Number 7

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