<prompt> Negative pressure dressing is used forRemoval of escharChronic non-healing diabetic ulcerUnexplored fistulasUntreated osteomyelitis  <response>: Answer- B. Chronic non-healing diabetic ulcerNegative-pressure wound therapy NPWT is a therapeutic technique using a vacuum dressing to promote healing in acute or chronic wounds and enhance healing ofsecond and third degree burns.Use in the treatment of diabetes-associated chronic leg wounds. 