A critical care nurse is caring for a patient with a pulmonary artery catheter in place. What does this catheter measure that is particularly important in critically ill patients?
A) Pulmonary artery systolic pressure
B) Right ventricular afterload
C) Pulmonary artery pressure
D) Left ventricular preload
Ans: D
Feedback: Monitoring of the pulmonary artery diastolic and pulmonary artery wedge pressures is particularly important in critically ill patients because it is used to evaluate left ventricular filling pressures (ie, left ventricular preload). Options A, B, and C are not measurements of particular importance in critically ill patients; therefore, they are incorrect.
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