Correct Answer: C

Rationale: In clients receiving digoxin therapy, low potassium levels can increase the risk of digoxin toxicity. Therefore, when the nurse notes a serum potassium level of 3.0 mEq/L, it is crucial to hold the next dose of digoxin. Notifying the healthcare provider is essential to ensure appropriate interventions, such as potassium supplementation, can be implemented. Administering a potassium supplement without healthcare provider guidance may lead to rapid potassium level changes and potential adverse effects. Increasing dietary potassium intake alone may not promptly address the low serum potassium level in this acute situation.

Correct Answer: B

Rationale: The correct answer is B: Keep the skin on the stump clean and dry. This is crucial for preventing infection and promoting healing of the residual limb. Wrapping the stump with an elastic bandage can constrict blood flow and cause issues. Using alcohol to cleanse the stump daily can be too harsh and drying for the skin, leading to irritation. Applying moisturizing lotion daily is not as essential as keeping the skin clean and dry to prevent complications.

Correct Answer: A

Rationale: An allergy to shellfish often indicates an allergy to iodine, which is used in contrast dyes for CT scans. This poses a significant risk of an allergic reaction during the procedure. The nurse must ensure appropriate precautions or alternative imaging are considered. Choices B, C, and D are not directly contraindicated for a CT scan with contrast. Smoking history, metformin use, and controlled hypertension do not typically impact the safety or feasibility of the procedure.

Correct Answer: D

Rationale: A positive Chvostek's sign indicates hypocalcemia, a complication after parathyroid surgery that requires immediate attention. This sign is manifested by facial muscle twitching when the facial nerve in front of the ear is tapped, indicating neuromuscular irritability due to low calcium levels. Afebrile with a normal pulse (Choice A) is a normal finding and does not require immediate notification. No bowel movement since surgery (Choice B) is common postoperatively due to anesthesia effects and pain medications and usually resolves within a few days; it does not require immediate notification unless accompanied by other concerning symptoms. No appetite for breakfast (Choice C) is a common postoperative finding and does not require immediate notification unless it persists and leads to dehydration or malnutrition.

Correct Answer: D

Rationale: Sudden loss of consciousness in a client with a suspected stroke is the most concerning finding as it indicates a more severe neurological event, such as brain stem involvement or hemorrhage, requiring immediate intervention. While unilateral facial droop, slurred speech, and weakness in one arm are all common signs of a stroke, sudden loss of consciousness signifies a critical condition that needs urgent attention and evaluation to prevent further complications.