A nurse is explaining the pathophysiology of systemic inflammatory response syndrome (SIRS) to a group of newly licensed nurses. Which of the following statements by the nurse is accurate?
"A deregulated cytokine storm causes an inflammatory response."
"The major organ prone to injury during SIRS is the heart."
"Spleen dysfunction causes blood clotting issues."
"Activation of the inflammatory cascade causes increased perfusion."
The Correct Answer is A
A. "A deregulated cytokine storm causes an inflammatory response": Systemic inflammatory response syndrome (SIRS) is characterized by a dysregulated inflammatory response triggered by various insults such as infection, trauma, burns, or ischemia. In SIRS, the immune system responds excessively, leading to the release of pro-inflammatory cytokines (cytokine storm), including tumor necrosis factor-alpha (TNF-α), interleukin-1 (IL-1), and interleukin-6 (IL-6). This cytokine cascade results in widespread inflammation and systemic manifestations, such as fever, tachycardia, tachypnea, and leukocytosis.
B. "The major organ prone to injury during SIRS is the heart": While SIRS can lead to multi-organ dysfunction, including cardiac dysfunction, it does not primarily target the heart. SIRS affects multiple organs, including the lungs, kidneys, liver, and gastrointestinal tract. Cardiac dysfunction in SIRS may result from the inflammatory response, hypoperfusion, or direct myocardial injury.
C. "Spleen dysfunction causes blood clotting issues": SIRS can lead to coagulation abnormalities, but spleen dysfunction is not the primary cause. Coagulation abnormalities in SIRS are often attributed to endothelial dysfunction, activation of the coagulation cascade, and consumption of clotting factors, rather than spleen dysfunction.
D. "Activation of the inflammatory cascade causes increased perfusion": Activation of the inflammatory cascade in SIRS does not typically lead to increased perfusion. Instead, SIRS can lead to alterations in perfusion, including tissue hypoperfusion and microvascular dysfunction. In severe cases, SIRS can progress to septic shock, characterized by profound hypotension and inadequate tissue perfusion.
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Related Questions
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.
Correct Answer is B
Explanation
A. Synchronized electrical cardioversion: Synchronized electrical cardioversion is a procedure used to restore normal sinus rhythm in patients with certain types of arrhythmias, such as atrial fibrillation or atrial flutter. However, it is not typically indicated for all patients with worsening heart failure and arrhythmias.
B. Cardiac resynchronization therapy (CRT): CRT, also known as biventricular pacing, involves the placement of a specialized pacemaker device to improve the coordination of contractions between the heart's chambers. It is often used in patients with heart failure and arrhythmias to help regulate the rhythm and improve cardiac function.
C. Heart catheterization with percutaneous intervention: Heart catheterization with percutaneous intervention, such as angioplasty or stent placement, is used to treat coronary artery disease by opening narrowed or blocked blood vessels. While coronary artery disease may contribute to heart failure, this procedure specifically targets the coronary arteries rather than arrhythmias.
D. Echocardiogram : An echocardiogram is a diagnostic test that uses sound waves to create images of the heart's structure and function. While an echocardiogram may provide valuable information about the heart's condition in a patient with heart failure and arrhythmias, it is not a procedure used to regulate the rhythm directly.
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