Correct Answer: A

Rationale: The correct answer is to encourage early ambulation and leg exercises. By promoting early ambulation and leg exercises, blood flow is enhanced, reducing the risk of venous thromboembolism (VTE) in postoperative patients. Choice B, applying compression stockings, helps prevent VTE but is not as effective as early ambulation and exercises. Choice C, administering anticoagulants, is important in VTE prevention but does not directly address improving circulation through physical activity. Choice D, elevating the patient's legs, may be beneficial for circulation in specific cases but is not as effective in preventing VTE as early ambulation and leg exercises.

Correct Answer: B

Rationale: The correct answer is to recheck the blood pressure before calling for help. When caring for a client with unstable blood pressure, the nurse's priority is to ensure an accurate assessment. Rechecking the blood pressure will confirm the instability and guide further actions. Asking the charge nurse for assistance (Choice A) is important but should come after assessing the situation. Monitoring the client's blood pressure closely (Choice C) is essential, but the immediate action should be to recheck and confirm the current status. Administering antihypertensive medication immediately (Choice D) without a confirmed assessment can be dangerous and is not the initial priority.

Correct Answer: D

Rationale: The correct first action for the nurse to take in this situation is to file an incident report immediately. By doing so, the nurse ensures that the unsafe practice is documented for further investigation and corrective action. Speaking to the colleague directly may not address the root cause of the issue and could lead to potential conflicts. Ignoring the situation is not an appropriate response as it compromises patient safety. Reporting the colleague to the nursing manager should be done after filing an incident report to ensure that appropriate actions are taken to prevent future occurrences of non-compliance with hand hygiene protocols.

Correct Answer: B

Rationale: The correct method of safely using a sterile dressing is to discard it after 24 hours of use. This is important to prevent contamination and promote proper wound healing. Choice A is incorrect because reusing a dressing, even if it appears clean, can introduce contaminants. Choice C is incorrect as dressing changes should not be based solely on visible drainage; they should be done within the recommended time frame. Choice D is incorrect because changing a dressing every 4 hours, regardless of its condition, can lead to unnecessary wastage and disturbance to the wound healing process.

Correct Answer: B

Rationale: The correct answer is B: Back. Back injuries are most common during lifting and bending tasks, especially in an orthopedic unit. When lifting or repositioning patients, nurses must prioritize proper body mechanics to prevent strain on the back. Choices A, C, and D are less likely to occur as frequently as back injuries in this scenario because of the nature of the tasks involved in orthopedic patient care.