What are the early signs of hypokalemia on an ECG?

Correct Answer: A

Rationale: Flattened T waves are an early sign of hypokalemia on an ECG. In hypokalemia, the T waves may flatten and eventually invert. Elevated ST segments are not typically associated with hypokalemia. Prominent U waves are seen in conditions like hypokalemia, but they are not considered an early sign. A widened QRS complex is more commonly associated with hyperkalemia rather than hypokalemia.

Correct Answer: A

Rationale: When continuous bubbling is observed in the chest tube water seal chamber, the appropriate action is to tighten the connections of the chest tube system. This may resolve an air leak that is causing the continuous bubbling. Option B, replacing the chest tube system, is not the initial step to take and is considered more invasive. Clamping the chest tube (option C) can lead to complications and should not be done unless instructed by a healthcare provider. Continuing to monitor the chest tube (option D) without taking any corrective action may delay necessary interventions.

Correct Answer: A

Rationale: The correct answer is A: Restlessness, irritability, and confusion are early signs of increased intracranial pressure (IICP). These signs indicate that the brain is starting to experience pressure, often due to conditions such as trauma, tumors, or hemorrhage. Sudden onset of seizures (choice B) is not typically an early sign of IICP but can occur later as the pressure increases. Decreased heart rate and pupillary response (choice C) are more indicative of late-stage IICP as the brainstem becomes compromised. Loss of consciousness (choice D) is a late sign of IICP when the pressure has significantly increased and is causing significant brain dysfunction.

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: A thrombotic stroke typically presents with a gradual loss of function on one side of the body. This gradual onset distinguishes it from a hemorrhagic stroke, which often manifests with sudden and severe symptoms like loss of consciousness (choice B), severe headache and confusion (choice C), or loss of sensation in the affected limb (choice D). Therefore, choices B, C, and D are not typically associated with thrombotic strokes.