A nurse is teaching a client who has a new prescription for phenytoin to treat a seizure disorder. Which of the following adverse effects should the nurse instruct the client to report immediately to the provider?

Choice A rationale:
The combination of widened QRS, frequent premature ventricular contractions (PVCs), and bradycardia (heart rate of 55/min) on telemetry monitoring suggests hyperkalemia. Elevated potassium levels in the blood can cause delayed repolarization of cardiac cells, leading to widened QRS complexes and PVCs. Bradycardia is another common manifestation of hyperkalemia.
Choice B rationale:
Hypocalcemia, characterized by low calcium levels in the blood, can lead to cardiac arrhythmias, but it typically presents with a prolonged QT interval rather than widened QRS complexes and PVCs.
Choice C rationale:
Hyperglycemia, which is high blood glucose levels, does not directly affect the electrocardiogram (ECG) parameters like QRS width or heart rate. It may have systemic effects, but it is not responsible for the ECG changes described in the scenario.
Choice D rationale:
Hypophosphatemia, or low levels of phosphate in the blood, can cause muscle weakness and may have systemic effects, but it is not associated with the specific ECG changes seen in hyperkalemia, such as widened QRS complexes and PVCs.

Choice A rationale:
The nurse should not include the statement, "If your breath smells fruity, decrease your oral intake.”. in the discharge teaching for diabetic ketoacidosis. Fruity breath odor is a sign of diabetic ketoacidosis (DKA) due to ketone production. Decreasing oral intake would not address the underlying problem, and the client should be encouraged to seek medical attention promptly if experiencing this symptom.
Choice B rationale:
This is the correct choice. The nurse should instruct the client to check their urine for ketones if their blood sugar is greater than 300 milligrams per deciliter. High blood sugar levels can lead to ketone production, and monitoring ketones in the urine can help assess the severity of DKA and guide appropriate interventions.
Choice C rationale:
The statement, "Drink one liter of fluids daily.”. is not appropriate for a client with diabetic ketoacidosis. Clients with DKA often have fluid imbalances, and their fluid needs should be assessed and managed by healthcare professionals based on individual factors and laboratory values.
Choice D rationale:
The statement, "When nausea is present, drink chilled water.”. is not specific to diabetic ketoacidosis and may not be appropriate for all clients. Nausea can be caused by various factors, and addressing the underlying cause is important. Drinking chilled water may not necessarily alleviate nausea.