Correct Answer: A

Rationale: The correct answer is A: Flattened T waves. In hypokalemia, there is a decrease in serum potassium levels, which can lead to various ECG changes. One of the classic ECG findings associated with hypokalemia is the presence of flattened T waves. These T wave abnormalities are typically seen in multiple leads. Choice B, elevated ST segments, is not a typical ECG finding in hypokalemia. Choice C, widened QRS complexes, is more commonly associated with hyperkalemia rather than hypokalemia. Choice D is redundant and not a standard way of describing ECG findings.

Correct Answer: B

Rationale: For a patient with ventricular tachycardia and a pulse, the appropriate action is synchronized cardioversion. Defibrillation is used for pulseless ventricular tachycardia or ventricular fibrillation. Pacing is typically used for bradycardias. Medication administration may be considered in stable ventricular tachycardia cases but electrical intervention is preferred for immediate correction in this scenario.

Correct Answer: A

Rationale: The correct teaching to provide to a patient following cataract surgery is to avoid NSAIDs. NSAIDs should be avoided post-cataract surgery to reduce the risk of bleeding. Choice B, wearing dark glasses outdoors, is important to protect the eyes from bright light but is not directly related to medication use. Choice C, stating that creamy white drainage is normal, is incorrect as drainage should be monitored for excessive redness, swelling, or pain. Choice D, avoiding alcohol, is not a direct post-cataract surgery teaching point related to medication use.

Correct Answer: A

Rationale: The correct recommendation for a patient with pre-dialysis end-stage kidney disease is to reduce phosphorus intake to 700 mg/day. Excessive phosphorus can be harmful to individuals with kidney disease as the kidneys may not be able to effectively remove it from the body. Choices B, C, and D are incorrect. Increasing sodium intake is generally not recommended for patients with kidney disease as it can lead to fluid retention and high blood pressure. Restricting protein intake is important in later stages of kidney disease, but for pre-dialysis end-stage kidney disease, protein intake should be individualized based on the patient's condition. Limiting potassium-rich foods is more relevant for patients with advanced kidney disease or those on dialysis, as impaired kidney function can lead to high potassium levels in the blood.

Correct Answer: A

Rationale: Patients with pre-dialysis end-stage kidney disease should limit phosphorus intake to manage their condition. Excessive phosphorus can lead to mineral and bone disorders in patients with kidney disease. Choices B, C, and D are incorrect. Increasing protein intake is not recommended as it can burden the kidneys. Increasing sodium intake is usually discouraged due to its association with hypertension and fluid retention in kidney disease. Avoiding potassium-rich foods is more relevant in advanced kidney disease stages when potassium levels are high, not in pre-dialysis end-stage kidney disease.