Correct Answer: A

Rationale: Bradycardia is a common sign of digoxin toxicity. Digoxin, a cardiac glycoside, can lead to toxicity manifesting as bradycardia due to its effect on the heart's electrical conduction system. Tachycardia (choice B) is not typically associated with digoxin toxicity. Hypotension (choice C) and hyperkalemia (choice D) are not direct signs of digoxin toxicity. Therefore, the correct answer is bradycardia.

Correct Answer: A

Rationale: The correct answer is to ensure the client has consistent caregivers. This helps reduce confusion and stress for clients with dementia by providing familiarity and routine. Dimming the lights in the client's room (Choice B) may not directly address the risk of injury. Allowing the client to sleep with the bedrails raised (Choice C) can pose a risk if not properly monitored. Encouraging family members to stay with the client (Choice D) may not always be feasible and may not provide the necessary professional support and consistency that consistent caregivers can offer.

Correct Answer: A

Rationale: To assess a patient for potential deep vein thrombosis (DVT), healthcare professionals should look for unilateral leg swelling. This is a classic sign of DVT. While encouraging early mobilization is generally beneficial for preventing DVT, it is not a method of assessment. Checking for calf tenderness is also relevant but not as specific as unilateral leg swelling. Observing for redness and warmth can be signs of inflammation but are not as specific to DVT as unilateral leg swelling.

Correct Answer: A

Rationale: The correct intervention is to avoid taking blood pressures on the arm with the AV fistula. This is crucial to prevent complications such as damage to the fistula. Checking the fistula site for pallor is not as important as avoiding blood pressures on the affected arm. Placing warm compresses over the fistula site is not recommended as it can increase the risk of infection. Keeping the client's arm elevated on two pillows is not necessary for the care of an AV fistula.

Correct Answer: B

Rationale: The correct answer is to advise the client to avoid caffeinated drinks. Caffeine can temporarily increase blood pressure, so avoiding caffeinated drinks can help manage hypertension. Encouraging a low-sodium diet (Choice A) is essential for hypertension management as excess sodium can raise blood pressure. Increasing high-protein foods (Choice C) is not a primary focus in managing hypertension. While reducing fat intake (Choice D) can be beneficial for overall health, it is not the priority in lifestyle modifications for hypertension.