Correct Answer: A

Rationale: Flattened T waves are an early sign of hypokalemia on an ECG. Hypokalemia primarily manifests as flattened T waves on an ECG. While prominent U waves can be seen in hypokalemia, they are not as specific as flattened T waves. ST elevation is more commonly associated with conditions like myocardial infarction rather than hypokalemia. Wide QRS complexes are typically not a feature of hypokalemia on an ECG.

Correct Answer: A

Rationale: Patients with GERD should avoid mint and spicy foods as they can trigger reflux. Choice B ('Increase water intake during meals') is not recommended for GERD patients as it can worsen symptoms by distending the stomach. Choice C ('Eat frequent small meals') is beneficial for GERD patients to prevent excessive stomach distension. Choice D ('Consume more spicy foods') is incorrect as spicy foods can exacerbate GERD symptoms.

Correct Answer: A

Rationale: Corrected Answer: Muscle weakness is a common sign of hypokalemia. The nurse should monitor for muscle weakness as potassium plays a crucial role in muscle function. Choices B, C, and D are incorrect because although hypokalemia can lead to cardiac dysrhythmias, bradycardia, and even seizures in severe cases, muscle weakness is a more common and specific sign directly related to potassium levels.

Correct Answer: A

Rationale: When caring for a patient with an air leak in the chest tube system, the nurse should tighten the connections of the chest tube system. This action can help resolve the air leak by ensuring there are no loose connections or leaks in the system. Continuing to monitor the patient (Choice B) is important, but addressing the air leak is a priority. Replacing the chest tube system (Choice C) may not be necessary if tightening the connections resolves the issue. Clamping the chest tube (Choice D) is not appropriate as it can lead to tension pneumothorax.

Correct Answer: A

Rationale: The correct recommendation for a patient with GERD is to avoid mint and spicy foods. These types of foods can trigger acid reflux and worsen GERD symptoms. Choice B is incorrect as eating large meals before bed can increase the likelihood of acid reflux due to increased pressure on the lower esophageal sphincter. Choice C is also incorrect as consuming liquids with meals can cause distension in the stomach, potentially leading to reflux. Choice D is not directly related to GERD, as foods high in potassium are generally healthy and not specifically problematic for GERD patients.