The nurse is preparing to administer sodium polystyrene sulfonate (Kayexalate) rectally to a patient with an irregular pulse and weakness of the lower extremities.
What laboratory finding does the nurse determine is the reason for this treatment?

Choice A rationale

Using the inhaler before engaging in physical activity helps to prevent exercise-induced bronchospasm, which is common in patients with COPD.

Choice B rationale

Skipping doses if symptoms improve is not recommended as it can lead to suboptimal control of COPD and potential exacerbations.

Choice C rationale

Using the inhaler only when experiencing severe symptoms is not effective in managing COPD. Regular use as prescribed helps maintain lung function and prevent exacerbations.

Choice D rationale

Doubling the dose if symptoms do not improve immediately is not safe and can lead to adverse effects. Patients should follow the prescribed dosage and consult their healthcare provider if symptoms persist.

Choice A rationale

Blood glucose levels are important but are not the immediate priority for assessing the cause of severe vomiting and diarrhea with lightheadedness. Electrolyte imbalances are more likely to be the cause.

Choice B rationale

Serum potassium levels should be prioritized as vomiting and diarrhea can lead to significant potassium loss, which can result in dangerous cardiac and neuromuscular symptoms. Assessing potassium levels is crucial in this scenario.

Choice C rationale

Lipid profile is not relevant in the acute assessment of severe vomiting, diarrhea, and lightheadedness. This test is more useful for long-term cardiovascular risk assessment.

Choice D rationale

Thyroid function tests are not immediately relevant to the acute symptoms of vomiting and diarrhea with lightheadedness. Electrolyte imbalances are a more immediate concern.