A 72-year-old man with complete spinal cord injury at T4 has been bedbound for 8 months in a nursing home. On examination, a large sacral ulcer is noted with the structure marked **A** (exposed bone) visible at the base of the wound. Which of the following is the most critical next step in management to prevent further tissue destruction and systemic complications?

Explanation

## Why option B is right A Stage IV pressure injury with exposed bone (structure **A**) carries high risk of osteomyelitis, particularly in sacral ulcers where infection can spread to the pelvis. The presence of exposed bone mandates workup for underlying bone infection (MRI ± bone biopsy for culture). Critically, without aggressive pressure offloading (repositioning q2h supine, pressure-redistribution surfaces) and nutritional optimization (protein 1.25–1.5 g/kg/day, vitamin C, zinc), the wound will NOT heal regardless of local wound care. Systemic complications—cellulitis, osteomyelitis, and sepsis—are prevented by addressing the root cause (sustained pressure on bony prominence) and the patient's nutritional status. This integrates the NPIAP staging definition of Stage IV (exposed bone/tendon) with the evidence-based prevention and treatment hierarchy from Harrison 21e Ch 466. ## Why each distractor is wrong - **Option A**: While sharp debridement of slough/eschar is appropriate for Stage 3–4 ulcers, immediate surgical flap closure without first ruling out osteomyelitis, optimizing nutrition, and establishing pressure relief is premature and will fail. Flap closure is reserved for selected patients after infection is excluded and offloading is assured. - **Option C**: Topical ointment and hydrocolloid dressing alone are insufficient for Stage IV disease with exposed bone. This approach ignores the critical need for osteomyelitis workup, nutritional support, and pressure offloading—the true drivers of healing. - **Option D**: Empiric systemic antibiotics without evidence of active infection (cellulitis/sepsis) promote resistance and do not address the mechanical cause (pressure). Bed rest without repositioning perpetuates pressure injury; offloading requires active repositioning q2h and pressure-redistribution surfaces. **High-Yield:** Stage IV pressure injury with exposed bone requires osteomyelitis workup (MRI ± bone biopsy), nutritional optimization (protein 1.25–1.5 g/kg/day), and relentless pressure offloading (q2h repositioning)—healing is impossible without all three. [cite: Harrison 21e Ch 466]