Correct Answer: D

Rationale: Central venous pressure (CVP) monitoring is the most effective method to assess fluid status and the cardiovascular system in a client with severe burns. Severe burns can lead to significant fluid shifts and hemodynamic changes, making central venous pressure monitoring crucial for guiding fluid resuscitation and managing cardiovascular stability in these patients.

Correct Answer: C

Rationale: To collect a wound culture, the nurse should first clean the wound to remove skin flora and then insert a sterile swab from a culturette tube into the wound secretions.

Correct Answer: B

Rationale: If a sterile field becomes wet or damp during a procedure, it is considered contaminated as moisture can allow organisms to wick from the surface and compromise the sterility of the field. It is essential to maintain the integrity of the sterile field to prevent infections and ensure patient safety.

Correct Answer: A

Rationale: Monitoring urine output is the most direct way to assess kidney function as it provides crucial information about the kidneys' ability to filter waste and produce urine. Changes in urine output can indicate potential issues with kidney function, such as decreased filtration or impaired excretion of waste products.

Correct Answer: B

Rationale: Theophylline should be administered on a regular around-the-clock schedule to provide the best bronchodilating effect and reduce the potential for adverse effects. The correct dosing schedule of 8 a.m., 4 p.m., and midnight ensures that the client receives consistent dosing throughout the day. Other options do not provide the necessary around-the-clock coverage. It's important to note that food may affect the absorption of the medication, which is why the dosing schedule should not be tied to meal times.