The nurse is providing care to a client who has survived cardiac arrest Which of the following manifestations should alert the nurse to the development of PCAS?
Decreased circulation to the kidneys
Increased mental capacity
Improving respiratory function
Improvement in heart rate and blood pressure
The Correct Answer is A
A. Decreased circulation to the kidneys: Post-cardiac arrest syndrome (PCAS) is a constellation of systemic ischemia/reperfusion injury responses that occur after return of spontaneous circulation (ROSC) following cardiac arrest. One of the manifestations of PCAS is decreased circulation to the kidneys due to the systemic hypoperfusion that occurs during cardiac arrest and the subsequent reperfusion injury that follows ROSC. This can lead to acute kidney injury (AKI) in some cases.
B. Increased mental capacity: While it is crucial to monitor neurological status after cardiac arrest, an immediate increase in mental capacity is not typically indicative of PCAS. Rather, neurological assessment may involve evaluating for signs of brain injury or dysfunction, which can include altered mental status, confusion, or neurological deficits.
C. Improving respiratory function: Improvement in respiratory function after cardiac arrest is a positive sign but may not necessarily indicate the development of PCAS. PCAS primarily involves systemic responses to the ischemia/reperfusion injury that occurs during and after cardiac arrest, rather than isolated respiratory changes.
D. Improvement in heart rate and blood pressure: Improvement in heart rate and blood pressure after cardiac arrest is generally expected with successful resuscitation efforts. However, these improvements alone may not necessarily indicate the development of PCAS. PCAS involves a broader range of systemic responses beyond just cardiac and hemodynamic changes.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. The heart's electrical transmission through the atrioventricular (AV) node is unusually slow: This statement does not align with the manifestations of dizziness and palpitations in atrial fibrillation. A slow conduction through the AV node would typically manifest as bradycardia or heart block rather than rapid and irregular palpitations.
B. The heart's electrical signals are rapid, chaotic, and irregular: This is the correct answer. Atrial fibrillation is characterized by rapid, chaotic, and irregular electrical signals in the atria, leading to ineffective atrial contractions and an irregular ventricular response. The irregularity and rapidity of the heart rate can lead to symptoms such as palpitations and dizziness.
C. An early electrical signal occurs before the expected sinoatrial (SA) node signal: This statement does not accurately describe the mechanism of atrial fibrillation. Atrial fibrillation involves disorganized electrical activity in the atria, rather than a single early electrical signal.
D. The SA node sends an electrical signal greater than 100/min: While a heart rate greater than 100/min (tachycardia) is commonly associated with atrial fibrillation, this statement does not fully explain the manifestations of dizziness and palpitations. These symptoms are more directly related to the irregularity and chaotic nature of the heart's electrical signals in atrial fibrillation.
Correct Answer is C
Explanation
A. An abdominal aortic aneurysm is commonly found in the suprarenal aorta: This statement is incorrect. Abdominal aortic aneurysms (AAAs) are most commonly found infrarenally, below the level of the renal arteries, rather than in the suprarenal region.
B. An abdominal aortic aneurysm occurs as a result of a thickened wall of the abdominal artery: This statement is incorrect. An abdominal aortic aneurysm typically occurs due to weakening of the arterial wall, rather than thickening. The weakened wall allows the arterial wall to bulge or balloon out, forming an aneurysm.
C. An abdominal aortic aneurysm is a dilation of the abdominal aorta greater than 30 mm in diameter: This statement is correct. An abdominal aortic aneurysm is defined as a localized dilation of the abdominal aorta that exceeds 50% of the normal vessel diameter, typically greater than 30 mm in diameter. This dilation occurs due to weakening of the arterial wall, which can result from various factors such as atherosclerosis, hypertension, and genetic predisposition.
D. Abdominal aortic aneurysms might rupture if blood pressure is too low: This statement is incorrect. Abdominal aortic aneurysms are more likely to rupture when blood pressure is too high, rather than too low. Hypertension increases the pressure within the weakened arterial wall, potentially leading to rupture. Therefore, controlling blood pressure is crucial in managing abdominal aortic aneurysms to reduce the risk of rupture.
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