A client is hospitalized for observation after suffering heat exhaustion during a marathon race. He complains of dizziness when he stands up, and the RN determines that he has postural hypotension. Based on the information, which of the following electrolyte imbalances could cause the client's symptoms?
Hypernatremia
Hyponatremia
Hyperkalemia
Hypokalemia
The Correct Answer is B
Choice A reason: Hypernatremia is a condition of high sodium levels in the blood. It can cause symptoms such as thirst, dry mouth, confusion, agitation, and seizures. It is not likely to cause postural hypotension, which is a drop in blood pressure when changing positions.
Choice B reason: Hyponatremia is a condition of low sodium levels in the blood. It can cause symptoms such as headache, nausea, vomiting, muscle weakness, fatigue, and confusion. It can also cause postural hypotension, as sodium helps regulate fluid balance and blood pressure.
Choice C reason: Hyperkalemia is a condition of high potassium levels in the blood. It can cause symptoms such as muscle weakness, paralysis, irregular heartbeat, and cardiac arrest. It is not likely to cause postural hypotension, which is more related to fluid and sodium levels.
Choice D reason: Hypokalemia is a condition of low potassium levels in the blood. It can cause symptoms such as muscle cramps, weakness, fatigue, constipation, and arrhythmias. It is not likely to cause postural hypotension, which is more related to fluid and sodium levels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Identification is a defense mechanism where the person adopts the characteristics or behaviors of someone else, usually someone more powerful or successful, to cope with feelings of inadequacy or insecurity.
Choice B reason: Denial is a defense mechanism where the person refuses to accept or acknowledge the reality of a situation or a problem, to avoid dealing with the negative emotions or consequences.
Choice C reason: Displacement is a defense mechanism where the person transfers their feelings or impulses from the original source to a less threatening or more acceptable one, to reduce the anxiety or guilt.
Choice D reason: Rationalization is a defense mechanism where the person uses logical or plausible explanations to justify or excuse their actions or behaviors, to avoid facing the true motives or reasons.
Correct Answer is A
Explanation
Choice A reason: Gradual loss of peripheral vision is a characteristic symptom of open-angle glaucoma, which is the most common type of glaucoma. It occurs when the drainage angle of the eye becomes blocked, causing increased intraocular pressure and damage to the optic nerve.
Choice B reason: Gradual loss of central vision is more typical of age-related macular degeneration, which is a condition that affects the macula, the central part of the retina. It is not a symptom of open-angle glaucoma.
Choice C reason: Sudden headache and nausea are signs of acute angle-closure glaucoma, which is a medical emergency that requires immediate treatment. It occurs when the drainage angle of the eye suddenly closes, causing a rapid rise in intraocular pressure and severe pain.
Choice D reason: Cloudy blurred vision is a symptom of cataract, which is a condition that causes the lens of the eye to become cloudy and opaque. It is not a symptom of open-angle glaucoma.
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