NCLEX Practice Quiz: Preparing for Negative-Pressure Wound Therapy NCLEX Practice Quiz: Preparing for Negative-Pressure Wound Therapy The nurse provides care for a client prescribed negative-pressure wound therapy for a wound on the left lower extremity. Which is the most important action for the nurse to take prior to initiation of the therapy? 1. Check serum protein levels. 2. Check serum calcium level. 3. Assess capillary refill of the upper extremities. 4. Check white blood cell count. Δ