Correct Answer: C

Rationale: The correct first action for the nurse to take when a patient has difficulty ambulating after surgery is to call for assistance with ambulation. This is essential to ensure the safety of the patient and prevent any potential falls or injuries. Encouraging deep breathing exercises (Choice A) may be beneficial but should not be the first priority when the patient is having difficulty walking. Assisting the patient in ambulating a short distance (Choice B) may put both the patient and the nurse at risk if the patient is struggling. Assessing the patient's pain level before ambulation (Choice D) is important but should come after ensuring that the patient can safely ambulate with assistance.

Correct Answer: C

Rationale: The correct answer is C: Nonmaleficence. Nonmaleficence is the ethical principle that focuses on avoiding harm to the patient. In this scenario, by considering a bone marrow transplant for the client with leukemia, healthcare professionals are practicing nonmaleficence by aiming to minimize harm. Choice A, Justice, pertains to fairness in the distribution of resources and decisions, which is not the primary focus in this situation. Choice B, Beneficence, involves promoting the patient's well-being, which is related but not directly addressing the act of minimizing harm. Choice D, Autonomy, refers to respecting the patient's right to make decisions about their own care, which is not the key principle at play when minimizing harm in this context.

Correct Answer: D

Rationale: In a postoperative patient, an oxygen saturation level of 88% on room air indicates a significant drop below the normal range, suggesting potential respiratory distress. This finding requires immediate intervention by the nurse to ensure the patient receives adequate oxygenation. A heart rate of 88 beats per minute is within the normal range, making it a less concerning finding. A blood pressure of 130/80 mmHg falls within the normal range for blood pressure and does not require immediate intervention. Crackles heard in the lung bases may indicate fluid accumulation but may not always require immediate intervention unless accompanied by other concerning signs or symptoms.

Correct Answer: C

Rationale: The correct first action for the nurse to take when a patient has difficulty ambulating after surgery is to call for assistance with ambulation. This is essential to ensure the safety of the patient and prevent any potential falls or injuries. Encouraging deep breathing exercises (Choice A) may be beneficial but should not be the first priority when the patient is having difficulty walking. Assisting the patient in ambulating a short distance (Choice B) may put both the patient and the nurse at risk if the patient is struggling. Assessing the patient's pain level before ambulation (Choice D) is important but should come after ensuring that the patient can safely ambulate with assistance.

Correct Answer: B

Rationale: Confirming the patient's allergies before administering medications is crucial for patient safety as it helps prevent adverse reactions. Checking the patient's wristband is important for identification but may not directly impact medication safety. Documenting medications after administration is necessary but does not primarily promote safety during administration. Preparing medications at the medication cart, rather than the nurse's station, is preferred to ensure accuracy and proper medication handling, but it is not directly related to confirming allergies for safety.