A nurse is assessing a client's pulmonary artery wedge pressure (PAWP). The nurse should recognize that an elevated PAWP indicates which of the following complications?
Hypotension
Hypovolemia
Cardiogenic shock
Left ventricular failure
The Correct Answer is D
Rationale:
A. Hypotension: Hypotension is typically associated with decreased preload and low PAWP rather than elevated values. An elevated PAWP reflects increased pressure in the left heart, which does not occur with simple hypotension alone.
B. Hypovolemia: Hypovolemia leads to decreased circulating blood volume, reducing preload and PAWP. It is typically marked by low filling pressures, not elevated wedge pressures.
C. Cardiogenic shock: Although cardiogenic shock can be associated with elevated PAWP due to poor cardiac output and fluid backup, it is not as specific a marker as left ventricular failure, which directly affects PAWP.
D. Left ventricular failure: Elevated PAWP reflects increased pressure in the left atrium and pulmonary circulation, which is a hallmark of left-sided heart failure. This elevation occurs because the failing left ventricle cannot efficiently pump blood forward.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Rationale:
A. "Apply the ointment to the skin every 4 hr.": Nitroglycerin topical ointment is applied every 6 to 8 hours, depending on the provider's instructions. Applying it every 4 hours may increase the risk of side effects such as hypotension or tolerance due to excessive dosing frequency.
B. "Spread the ointment in a thin, even layer.": The medication should be applied in a thin, consistent layer to allow for proper absorption through the skin. The dose is usually measured and spread using applicator paper, avoiding rubbing or massaging it in.
C. "Apply the ointment to the forearm.": The preferred application sites are hairless areas of the chest, back, or upper arms. The forearm is not typically used due to variability in absorption and the presence of thinner skin and more movement.
D. "Massage the ointment into the skin.": Nitroglycerin ointment should never be massaged into the skin. Massaging can lead to unpredictable absorption rates and an increased risk of hypotension or headache due to rapid systemic absorption.
Correct Answer is B
Explanation
Rationale:
A. "Remove a plug from the socket by pulling the cord": Yanking the cord can damage the cord, loosen wiring, and increase the risk of sparks or electrical fire. The correct method is to grasp the plug firmly and pull it straight out to avoid strain on the wire connections.
B. "Use three-pronged grounded plugs": Three-pronged plugs provide a grounding mechanism that reduces the risk of electric shock and fire. Grounded outlets redirect excess electricity safely into the ground if a fault occurs, making them a key part of electrical safety.
C. "Check for a tingling sensation around the cord": A tingling sensation can indicate an electrical short or exposed wiring, which is a serious safety hazard. While it’s important to report and stop using such cords, the focus should be on prevention before such issues arise.
D. "Cover extension cords with a rug": Covering cords with rugs can trap heat, cause insulation to wear down, and increase fire risk. Cords should be left uncovered and positioned to avoid foot traffic while maintaining ventilation to prevent overheating.
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