A nurse is reviewing the BUN result of a client who is taking cyclosporine following a kidney transplant. Which of the following laboratory studies should the nurse recognize as another renal function study that should be monitored?

Choice A reason: Multiple facial lacerations, if not affecting airway or causing severe bleeding, are minor injuries in triage (green tag). These clients can wait for treatment without immediate risk, aligning with disaster triage principles, making this the correct classification.
Choice B reason: A puncture wound to the lung is life-threatening, potentially causing pneumothorax or hemothorax, requiring urgent intervention (red tag). This is not a minor injury, so it does not qualify for a green tag, making it incorrect.
Choice C reason: Full-thickness burns over the lower extremities are severe, requiring immediate fluid resuscitation and specialized care (red or yellow tag). These are not minor injuries, so this client does not fit green tag criteria, making it incorrect.
Choice D reason: An open compound fracture of the humerus is a significant injury with risks of infection and bleeding, requiring prompt surgical intervention (yellow or red tag). It is not minor, so it does not qualify for a green tag, making it incorrect.

Choice A reason: Checking patency every 8 hours is inadequate for closed wound drainage systems, which require more frequent monitoring (e.g., every 4 hours) to detect blockages. Delayed checks risk fluid buildup, increasing infection or seroma risk, critical in postoperative wound management.
Choice B reason: Emptying the drainage system every 24 hours may be insufficient, as frequency depends on volume. Systems like Jackson-Pratt drains need emptying when half-full to maintain suction, preventing complications like infection, requiring flexible, volume-based schedules rather than fixed intervals.
Choice C reason: Securing the drainage system to the gown prevents dislodgement, maintaining suction and reducing infection risk. It supports mobility while stabilizing the system, preventing wound tension. This is critical for effective drainage and healing in postoperative clients with closed systems.
Choice D reason: Replacing the drainage system every 3 days is unnecessary unless infection or malfunction occurs. Routine replacement risks introducing pathogens or disrupting healing. Systems remain until drainage decreases, guided by clinical assessment, not a fixed schedule, to ensure safety.