What are known triggers for vaso-occlusive crises, such as Sickle Cell Disease?
Alkalosis and insomnia
Reduced stress and warm environmental temperature
Acidosis and dehydration
High fat diet and hyperoxia
The Correct Answer is C
A. Alkalosis and insomnia:
Alkalosis does not trigger sickling; acidosis (low pH) is more harmful. Insomnia alone is not a direct trigger.
B. Reduced stress and warm environmental temperature:
Reduced stress and warmth help prevent crises rather than cause them.
C. Acidosis and dehydration:
Acidosis promotes sickling of RBCs, and dehydration increases blood viscosity, both triggering vaso-occlusive crises.
D. High fat diet and hyperoxia:
A high-fat diet is linked to cardiovascular disease, and hyperoxia (excess oxygen) is not a trigger for sickling.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A ruptured or expanding abdominal aortic aneurysm causes sudden back and abdominal pain and is more common in people with hypertension.
B. Embolus:
An embolus would cause acute blockage, usually leading to ischemia downstream, but not arterial dilation.
C. Phlebitis:
Phlebitis is inflammation of a vein, not an artery, and does not cause sudden severe back pain.
D. Thrombus:
A thrombus is a clot, and while it can block vessels, it does not cause local dilation of arteries.
Correct Answer is B
Explanation
A. Lymphedema:
Lymphedema is localized fluid accumulation due to lymphatic obstruction, usually unilateral and not associated with dyspnea or heart failure signs.
B. Congestive heart failure (CHF):
CHF leads to fluid buildup (causing JVD, edema) and respiratory symptoms (cough, dyspnea) due to impaired heart pumping.
C. Endocarditis:
Endocarditis is an infection of the heart valves, presenting more with fever, murmurs, and embolic signs, not classic CHF symptoms.
D. Atrial fibrillation:
AFib causes irregular heart rhythm, and may contribute to CHF, but on its own, AFib doesn’t cause pitting edema and JVD without underlying CHF.
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