A person who is lethargic with dry mucous membranes reports having watery diarrhea and feeling lightheaded and will most likely have which additional manifestation of dehydration?
Bradycardia
Eupnea
Orthostatic hypotension
Elevated blood pressure
The Correct Answer is C
Choice A reason: Bradycardia, or slow heart rate, is not typically associated with dehydration. Dehydration reduces blood volume, triggering compensatory tachycardia to maintain cardiac output. Bradycardia may occur in severe cases with electrolyte imbalances, but it is not a primary manifestation, making this choice incorrect for dehydration.
Choice B reason: Eupnea refers to normal breathing. Dehydration does not directly alter respiratory rate unless severe metabolic acidosis occurs, prompting compensatory hyperventilation. The described symptoms suggest hypovolemia, not respiratory changes, so eupnea is not an additional manifestation of dehydration, making this choice incorrect.
Choice C reason: Orthostatic hypotension, a drop in blood pressure upon standing, occurs in dehydration due to reduced blood volume from fluid loss (e.g., diarrhea). This hypovolemia impairs the body’s ability to maintain blood pressure during positional changes, leading to lightheadedness, making this the correct additional manifestation.
Choice D reason: Elevated blood pressure is not associated with dehydration. Hypovolemia from fluid loss causes low blood pressure due to decreased cardiac output. The body’s compensatory mechanisms, like vasoconstriction, aim to maintain pressure but do not elevate it above normal, making this choice incorrect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Unilateral leg swelling suggests deep vein thrombosis, a precursor to pulmonary embolism, not a direct manifestation. Pulmonary embolism affects the lungs, causing respiratory symptoms, making this choice incorrect.
Choice B reason: Sudden facial numbness is associated with stroke, not pulmonary embolism. Pulmonary embolism causes pulmonary and systemic symptoms like chest pain, not neurological deficits, making this choice incorrect.
Choice C reason: Blood in the urine (hematuria) is unrelated to pulmonary embolism, which affects pulmonary arteries. It may occur in renal conditions, not pulmonary vascular obstruction, making this choice incorrect.
Choice D reason: Chest pain is a hallmark of pulmonary embolism, caused by pleural irritation or ischemia from blocked pulmonary arteries. It is often sharp and worsens with breathing, making this the correct choice.
Correct Answer is ["A","B","D","E"]
Explanation
Choice A reason: Fluid excess causes weight gain due to increased water retention in tissues and vascular spaces. This is common in conditions like heart failure or renal dysfunction, where fluid accumulates, increasing body mass, making this a correct manifestation.
Choice B reason: Edema, swelling from fluid accumulation in interstitial spaces, is a hallmark of fluid excess. It occurs when hydrostatic or oncotic pressures are imbalanced, as in heart or kidney failure, making this a correct manifestation.
Choice C reason: Fluid excess typically increases blood pressure due to expanded blood volume, as seen in heart failure. Decreased blood pressure is not a direct result of fluid overload, making this choice incorrect for fluid excess.
Choice D reason: Crackles in the lungs occur in fluid excess, as fluid leaks into alveoli (pulmonary edema) due to increased hydrostatic pressure, often in heart failure. This impairs gas exchange, making this a correct manifestation.
Choice E reason: Jugular vein distension results from fluid excess increasing venous pressure, often in right heart failure. Expanded blood volume distends neck veins, a visible sign of fluid overload, making this a correct manifestation.
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