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9. A male patient (83-kg IBW) is intubated and ventilated with PC-CMV, f = 12/min, set PIP = 28 cm H2O, resulting in a VT of 430 mL. The ABG results on this setting are: pH 7.35, PaCO2 45 mm Hg, and HCO3− 23 mEq/L. Forty-eight hours later on the same settings, the ABG results are: pH 7.54, PaCO2 27 mm Hg, and HCO3 − 21 mEq/L with an exhaled VT of 800 mL. The most appropriate action at this time is which of the following? a. Decrease PIP to 25 cm H2O. b. Decrease PIP to 19 cm H2O. c. Decrease f to 10/min. d. Decrease f to 8/min.

9. A male patient (83-kg IBW) is intubated and ventilated with PC-CMV, f = 12/min, set PIP = 28 cm H2O, resulting in a VT of 430 mL. The ABG results on this setting are: pH 7.35, PaCO2 45 mm Hg, and HCO3− 23 mEq/L. Forty-eight hours later on the same settings, the ABG results are: pH 7.54, PaCO2 27 mm Hg, and HCO3 − 21 mEq/L with an exhaled VT of 800 mL. The most appropriate action at this time is which of the following? a. Decrease PIP to 25 cm H2O. b. Decrease PIP to 19 cm H2O. c. Decrease f to 10/min. d. Decrease f to 8/min.

Basic Clinical Lab Competencies for Respiratory Care: An Integrated Approach
Basic Clinical Lab Competencies for Respiratory Care: An Integrated Approach
5th Edition
ISBN:9781285244662
Author:White
Publisher:White
Chapter9: Hemodynamic Monitoring
Section: Chapter Questions
Problem 8SEPT
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9. A male patient (83-kg IBW) is intubated and ventilated with PC-CMV, f = 12/min, set PIP = 28 cm H2O, resulting in a VT of 430 mL. The ABG results on this setting are: pH 7.35, PaCO2 45 mm Hg, and HCO3− 23 mEq/L. Forty-eight hours later on the same settings, the ABG results are: pH 7.54, PaCO2 27 mm Hg, and HCO3 − 21 mEq/L with an exhaled VT of 800 mL. The most appropriate action at this time is which of the following?
a. Decrease PIP to 25 cm H2O.
b. Decrease PIP to 19 cm H2O.
c. Decrease f to 10/min.
d. Decrease f to 8/min.

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