What is the significance of elevated serum levels of troponin?
This intracellular substance can leak into the blood with cardiac cellular injury or death.
Elevated serum levels of troponin occur because of sustained glycogenolysis.
This substance is elevated when a patient has acute tubular necrosis.
Serum elevation of this acute phase reactant occurs because of tissue injury.
The Correct Answer is A
Choice A rationale
Elevated serum levels of troponin indicate cardiac cellular injury or death. Troponin is a protein released into the bloodstream when heart muscle cells are damaged, such as during a myocardial infarction.
Choice B rationale
Sustained glycogenolysis does not cause elevated troponin levels. Glycogenolysis is the breakdown of glycogen to glucose, primarily occurring in the liver and muscles, not related to troponin release.
Choice C rationale
Acute tubular necrosis does not elevate troponin levels. This condition affects the renal tubules and is typically indicated by elevated creatinine and BUN levels.
Choice D rationale
Troponin is not an acute phase reactant. Acute phase reactants are proteins whose levels change in response to inflammation, such as C-reactive protein (CRP), not troponin.
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Correct Answer is C
Explanation
Choice A rationale
Administering diuretic medication as prescribed is an important intervention for managing fluid overload in heart failure. Diuretics help reduce fluid accumulation by increasing urine output, which can alleviate symptoms such as swelling and shortness of breath. However, before administering any medication, it is crucial to assess the client’s current respiratory status and oxygen saturation to determine the severity of their condition and ensure that the intervention is appropriate and safe.
Choice B rationale
Elevating the client’s legs can help reduce swelling in the lower extremities by promoting venous return and decreasing fluid accumulation. While this intervention can provide some relief, it does not address the immediate concern of the client’s respiratory status. Assessing the client’s respiratory status and oxygen saturation is a priority to ensure that they are receiving adequate oxygenation and to identify any potential respiratory distress that may require urgent intervention.
Choice C rationale
Assessing the client’s respiratory status and oxygen saturation is the first priority in this scenario. Heart failure can lead to pulmonary congestion and impaired gas exchange, resulting in shortness of breath and decreased oxygen levels. By assessing the client’s respiratory status and oxygen saturation, the nurse can determine the severity of the client’s condition, identify any immediate respiratory needs, and implement appropriate interventions to improve oxygenation and respiratory function.
Choice D rationale
Restricting fluid intake is a common intervention for managing fluid overload in heart failure. By limiting fluid intake, the nurse can help prevent further fluid accumulation and reduce the risk of worsening symptoms. However, this intervention does not address the immediate concern of the client’s respiratory status. Assessing the client’s respiratory status and oxygen saturation is a priority to ensure that they are receiving adequate oxygenation and to identify any potential respiratory distress that may require urgent intervention.
Correct Answer is A
Explanation
Choice A rationale
Elevated serum levels of troponin indicate cardiac cellular injury or death. Troponin is a protein released into the bloodstream when heart muscle cells are damaged, such as during a myocardial infarction.
Choice B rationale
Sustained glycogenolysis does not cause elevated troponin levels. Glycogenolysis is the breakdown of glycogen to glucose, primarily occurring in the liver and muscles, not related to troponin release.
Choice C rationale
Acute tubular necrosis does not elevate troponin levels. This condition affects the renal tubules and is typically indicated by elevated creatinine and BUN levels.
Choice D rationale
Troponin is not an acute phase reactant. Acute phase reactants are proteins whose levels change in response to inflammation, such as C-reactive protein (CRP), not troponin.