Polystyrene sulfonate (Kayexalate) is used in renal failure to:
Reduce serum phosphate levels.
Prevent constipation from sorbitol use.
acts by pulling potassium into the bowels and exchanging it for sodium
acts by adding potassium into the bowels and exchanging it for sodium bicarbonate
The Correct Answer is C
Choice A rationale: Kayexalate is not primarily used for phosphate reduction.
Choice B rationale: Kayexalate can have sorbitol in its formulation, which might cause diarrhea rather than constipation.
Choice C rationale: Kayexalate works as a cation-exchange resin that promotes potassium excretion in the bowels.
Choice D rationale: Kayexalate does not add potassium; it exchanges sodium for potassium in the bowels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale: Performing active range of motion exercises may not be safe or appropriate immediately following a hemorrhagic stroke.
Choice B rationale: Maintaining the head of bed flat or at a 30-degree position might be used for ischemic strokes but not necessarily for hemorrhagic strokes.
Choice C rationale: Teaching measures to avoid the Valsalva maneuver (straining during activities like defecation) helps prevent sudden increases in intracranial pressure, which can be detrimental after a hemorrhagic stroke.
Choice D rationale: Monitoring for Battle's sign (bruising behind the ears associated with basilar skull fracture) is not relevant in the care of a hemorrhagic stroke.
Correct Answer is C
Explanation
Choice A rationale: Assessing the UOP is important, but not as urgent as correcting the potassium imbalance.
Choice B rationale: Obtaining a 12-lead ECG can help monitor the cardiac status, but it does not address the cause of the problem.
Choice C rationale: The PMHCP can order potassium replacement to prevent cardiac arrhythmias and other adverse effects of low potassium levels.
Choice D rationale: Stopping the regular insulin infusion can worsen the DKA and increase the risk of cerebral edema and coma.
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