The process of V.A.C. therapy involves placing sterile foam in the wound and applying an airtight dressing. Then the V.A.C. device applies continuous, controlled, vacuum pressure. The suction removes problematic fluids and deposits them in a disposable container.
Removing chronic swelling in this way increases productive localized blood flow. The negative pressure also accelerates the growth of wound healing tissue.
For some patients, a mini-VAC may be available. This is a portable unit that can be worn while walking.