A 60-year-old man is evaluated in the hospital for a pressure injury. The pressure injury developed during a prolonged hospitalization after a motor vehicle accident that resulted in a closed head injury and pelvic and spinal fractures. Medications are heparin, oxycodone, and ibuprofen or acetaminophen as needed. On physical examination, vital signs are normal. A painful 4-cm sacral ulcer with full-thickness loss of skin and adipose tissue is present (stage III). The ulcer has no purulence or surrounding induration. Which of the following is the most appropriate treatment?
A. Hydrocolloid dressing
B. Platelet-derived growth factor dressing
C. Standard gauze dressing
D. Zinc-infused dressing