Image Source: Science Direct


Negative pressure wound therapy, NPWT, systems are FDA class II devices that are indicated for the application of suction via negative pressure to promote wound healing. NPWT may be indicated for use on diabetic ulcers, pressure ulcers, chronic, acute, and traumatic wounds.

The wound treatment via the NPWT system includes a foam dressing that is placed directly on the wound and sealed with an adhesive film.

A drainage tube leads from under the adhesive film and connects to a portable vacuum pump. The pump provides suction to drain fluids such as wound exudate or bodily fluids from the wound to allow the edges of the wound to heal with less swelling.

In order to maintain effective wound management, the wound dressing should be changed every 24 to 72 hours and the canister should be changed once a week, or if it is two-thirds full of drainage.