A client is admitted to the emergency department with a magnesium level of 1.2 mg/dL. The nurse is aware that a likely cause of the value is which of the following:
Alcoholism.
Dehydration.
Kidney failure.
Excessive magnesium intake.
The Correct Answer is A
Choice A rationale
Alcoholism is a common cause of hypomagnesemia due to poor dietary intake, increased renal excretion, and gastrointestinal losses. Chronic alcohol consumption leads to malnutrition and loss of magnesium through the urine, contributing to low magnesium levels.
Choice B rationale
Dehydration typically leads to hemoconcentration, which can elevate, rather than decrease, magnesium levels. Thus, it is not usually associated with low magnesium levels.
Choice C rationale
Kidney failure generally causes hypermagnesemia, not hypomagnesemia, because the kidneys cannot efficiently excrete magnesium, leading to its accumulation in the blood.
Choice D rationale
Excessive magnesium intake would result in hypermagnesemia, not hypomagnesemia, as the body accumulates more magnesium than it can excrete.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Fluticasone is a corticosteroid used to manage asthma and COPD symptoms and does not typically require clarification.
Choice B rationale
Furosemide is a diuretic used to manage fluid overload in heart failure and does not require clarification.
Choice C rationale
Carvedilol is a non-selective beta-blocker that can exacerbate asthma symptoms and bronchospasm. It should be avoided in clients with a history of asthma.
Choice D rationale
Isosorbide dinitrate is a nitrate used to manage angina and heart failure and does not require clarification.
Correct Answer is A
Explanation
Choice A rationale
The oral mucosa is the most reliable indicator of central cyanosis because it reflects the oxygenation of central tissues. When there is a lack of oxygen in the bloodstream, the lips and mucous membranes, such as the oral mucosa, appear blue or cyanotic. This is a clear sign that the central tissues are not receiving adequate oxygenation.
Choice B rationale
The sclera of the eye is not a reliable indicator of central cyanosis. The sclera is white and does not change color due to oxygen levels. Instead, it may become yellow in jaundice or red in inflammation but does not reflect central cyanosis.
Choice C rationale
The ear lobes are peripheral areas and do not reliably indicate central cyanosis. Peripheral cyanosis can occur due to local blood flow issues, and ear lobes can appear blue in cold conditions even when central oxygenation is normal.
Choice D rationale
The soles of the feet, similar to the ear lobes, are peripheral areas and not reliable indicators of central cyanosis. Cyanosis in the feet can result from poor peripheral circulation rather than central hypoxia.
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