What is the purpose of negative pressure wound therapy (NPWT)?

• A. To increase exudate and edema
• B. To heat the wound
• C. To deliver topical medications
• D. Remove exudate, decrease edema, and promote wound healing through controlled suction

Answer: (D)

Negative pressure wound therapy uses controlled suction to manage the wound environment. By applying suction through a sealed dressing, it actively removes excess fluid (exudate) from the wound and reduces surrounding tissue edema. This drainage lowers tissue pressure, enhances blood flow to the area, and mechanically stimulates the formation of granulation tissue, all of which support faster and more effective healing. The sealed, moist environment also helps protect the wound and can reduce bacterial burden. This combination of fluid removal, edema reduction, and stimulation of healing processes is why the purpose is described as removing exudate, decreasing edema, and promoting wound healing through controlled suction. It’s not about heating the wound or delivering medications.