Correct Answer: A

Rationale: The correct answer is to check the client's potassium levels. Potassium levels are crucial to assess before hemodialysis in a client with renal failure because hyperkalemia (high potassium) is a common complication in these patients. Hemodialysis aims to remove excess potassium from the blood, making it essential to monitor potassium levels to determine the need for appropriate interventions. Reviewing the client's medication list (Choice B) is important for overall care but is not as directly relevant to the immediate concerns before hemodialysis. Assessing peripheral pulses (Choice C) and monitoring urine output (Choice D) are important aspects of nursing assessment but are not as directly related to the specific preparation needed before hemodialysis in a client with renal failure.

Correct Answer: C

Rationale: The correct teaching for a client with COPD prescribed home oxygen therapy is to educate them on how to clean and replace the oxygen tubing. This is crucial to prevent infections and ensure the effectiveness of the oxygen delivery system. Option A is not necessary as oxygen therapy is usually prescribed as needed, not continuously at night. While smoking cessation and avoiding smoke exposure are important in COPD management, it is not directly related to home oxygen therapy. Increasing fluid intake is beneficial for some conditions but is not specifically related to home oxygen therapy for COPD.

Correct Answer: C

Rationale: Irrigating and redressing a leg wound is a common task within the PN's scope of practice, making this assignment appropriate. Tasks like testing stool specimens for occult blood and assisting with ambulation of a client with a chest tube may require a higher level of training and assessment, typically performed by RNs. Admitting a client from the emergency room involves a comprehensive assessment and decision-making process, which is usually within the RN's responsibility.

Correct Answer: B

Rationale: To administer 35 mg of celtazidime from a 100 mg/ml solution, the nurse should give 0.4 ml of the reconstituted celtazidime solution. The calculation is 35 mg / 100 mg/ml = 0.35 ml, but since the vial is 500 mg, the answer is 0.35 ml * (500 mg / 100 mg) = 0.4 ml. Therefore, choices A, C, and D are incorrect as they do not reflect the correct calculation based on the provided information.

Correct Answer: D

Rationale: The correct answer is D. In acute pancreatitis, abdominal pain typically worsens after eating due to the stimulation of the pancreas to release enzymes that irritate the inflamed tissues. Pain relief when lying supine is uncommon and usually exacerbates discomfort. While nausea and vomiting are common symptoms, they are not as indicative of changes in pain intensity. Pain radiating to the back is characteristic but does not specifically relate to exacerbation post-eating.