An elderly patient has been having copious vomiting for several days and has become lethargic and weak. His mucous membranes are dry. He has poor skin turgor. Lab work shows: sodium of 145, ABGs: pH 7.58, PCO2 38, HCO3 38, PO2 95, SO2 98. Which response best explains the patient’s lethargy and weakness?
The hypokalemia brought on severe muscle spasms, causing exhaustion.
Due to his low potassium, his cells rely on glycolysis.
Due to the hypokalemia, his cells are hyperpolarized.
The hypernatremia caused cellular dehydration, leading to lethargy.
The Correct Answer is D
Choice A rationale
Hypokalemia can cause muscle weakness and cramps, but it does not typically lead to severe muscle spasms causing exhaustion. The patient’s symptoms of lethargy and weakness are more likely related to electrolyte imbalances and dehydration rather than muscle spasms.
Choice B rationale
While low potassium levels can affect cellular metabolism, the primary issue here is not glycolysis. The patient’s symptoms are more consistent with dehydration and electrolyte imbalances rather than a metabolic shift to glycolysis.
Choice C rationale
Hypokalemia can cause cells to become hyperpolarized, leading to muscle weakness and decreased reflexes. However, the patient’s symptoms of lethargy and weakness are more likely due to dehydration and electrolyte imbalances rather than cellular hyperpolarization.
Choice D rationale
Hypernatremia, or high sodium levels, can cause cellular dehydration, leading to symptoms such as lethargy and weakness. The patient’s lab results and clinical presentation are consistent with hypernatremia-induced cellular dehydration, which explains his symptoms.
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Correct Answer is C
Explanation
Choice A rationale
A respiratory rate of 22 breaths per minute is slightly elevated but not necessarily concerning for a client with COPD. COPD patients often have higher respiratory rates due to their chronic lung condition.
Choice B rationale
A temperature of 38°C (100.4°F) indicates a fever, which could be a sign of infection. However, it is not the most concerning finding in a COPD patient.
Choice C rationale
A pulse oximetry reading of 88% is concerning because it indicates hypoxemia. COPD patients often have lower oxygen levels, but a reading below 90% is worrisome and may require supplemental oxygen or other interventions.
Choice D rationale
A blood pressure of 140/90 mmHg is elevated but not immediately concerning in the context of COPD. It is important to monitor, but it is not the most critical finding.
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.