What is wedge pressure?
A measurement that reflects the pressure in the superior vena cava
A measurement that reflects the pressure in both the aortas
A measurement that reflects the pressure in the right atrium
A measurement that reflects left ventricular end-diastolic pressure
The Correct Answer is D
A. Superior vena cava pressure reflects right atrial pressure, not wedge pressure.
B. The aorta has its own pressures, unrelated to wedge pressure.
C. Right atrial pressure is measured separately, not via wedge pressure.
D. Pulmonary artery wedge pressure (PAWP) reflects the pressure in the left atrium and indirectly estimates left ventricular end-diastolic pressure, indicating left heart preload.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Pulmonary artery diastolic pressure (PADP) reflects left ventricular end-diastolic pressure and can be used as an indicator of left heart function and fluid status.
B. Not applicable as a standalone choice.
C. Both PADP and pulmonary artery wedge pressure (PAWP) are sensitive and commonly used hemodynamic measurements to assess cardiac function and intravascular volume.
D. Pulmonary artery wedge pressure (PAWP) is a direct reflection of left atrial pressure and is considered a sensitive indicator of left ventricular preload and fluid volume status.
Correct Answer is C
Explanation
A. The superior vena cava is a common site for central venous catheters but not where the Swan-Ganz catheter tip rests.
B. The aorta is part of the arterial system, and the Swan-Ganz catheter is not placed here.
C. The Swan-Ganz catheter is advanced through the right heart chambers and positioned in the pulmonary artery to measure pulmonary artery pressures and cardiac output.
D. The left ventricle is not accessible via venous catheterization and is not the placement site for a Swan-Ganz catheter.
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