Correct Answer: A

Rationale: To calculate the correct rate, you first need to convert the weight to micrograms: 4 mcg/kg/min * 80 kg = 320 mcg/min. Then, convert micrograms to milligrams: 320 mcg/min / 1000 = 0.32 mg/min. Next, calculate how many milligrams per hour: 0.32 mg/min * 60 min/hr = 19.2 mg/hr. Finally, determine the mL/hr rate by using the concentration provided: 19.2 mg/hr / 800 mg in 250 mL = 6 mL/hr. Therefore, the correct answer is 6 mL/hr. Choice B, 8 mL/hr, is incorrect as it does not reflect the accurate calculation based on the weight and drug concentration. Choices C and D, 12 mL/hr and 16 mL/hr, are also incorrect as they do not align with the correct calculation of the infusion rate for dopamine hydrochloride based on the client's weight and the medication concentration.

Correct Answer: B

Rationale: The correct answer is B: Vision changes. Vision changes are a classic sign of digoxin toxicity and should be reported immediately to the provider for further evaluation and management. A heart rate of 78/min, a respiratory rate of 16/min, and a blood pressure of 120/80 mm Hg are within normal ranges and are not typically associated with digoxin toxicity. Therefore, they would not be the priority findings to report in this situation.

Correct Answer: C

Rationale: The correct answer is C. The charge nurse should include information that the proxy can make treatment decisions if the client is under anesthesia. This is a key function of a durable power of attorney for health care. Choices A, B, and D are incorrect because a health care proxy's role is specifically related to making health care decisions, not financial decisions, legal issues, or decisions made under anesthesia.

Correct Answer: D

Rationale: The correct statement is D: 'An RN evaluates the client's needs to determine which tasks are appropriate to delegate to assistive personnel.' This is an essential step in the delegation process to ensure that tasks are assigned appropriately based on the client's condition and the competencies of the assistive personnel. Option A is incorrect because while the nurse retains accountability for delegation decisions, the AP is responsible for their actions. Option B is incorrect as tasks should be within the AP's scope of practice regardless of training. Option C is incorrect as delegation typically involves assigning tasks from the RN to the AP, not between APs.

Correct Answer: B

Rationale: Verifying the client's blood type and Rh factor is crucial before administering blood products to ensure compatibility and prevent adverse reactions. Option A is incorrect because PRBCs are typically infused over a specific time frame based on hospital policy and client condition, not necessarily over 8 hours. Option C is incorrect as PRBCs are usually administered through a larger gauge catheter to prevent hemolysis. Option D is incorrect because PRBCs are typically administered with normal saline and not lactated Ringer's solution.