Negative Pressure Wound Therapy

The 5 W’s of Negative Wound Pressure Therapy

By Maria Eilers

Aeroflow Healthcare is a Negative Pressure Wound Therapy (NPWT) home-use provider. Patients can get the equipment they need for home use, and our staff will help train the patient on use and assist with any billing through insurance. We find that many of our patient’s aren’t sure what Negative Pressure Wound therapy does or if they’ll be a good candidate. So here we answer the 5 W’s (and an H) about NPWT.

What Is Negative Pressure Wound Therapy?

A therapeutic technique using a vacuum dressing to promote healing in acute or chronic wounds. Therapy is performed by applying controlled sub-atmospheric pressure to the local wound environment, using a sealed wound dressing connected to a vacuum pump.

Who Is A Candidate For Negative Pressure Wound Therapy?

Candidates for negative pressure wound therapy include individuals suffering from:

  • Chronic ulcers caused by unrelieved pressure (bedsores), diabetes mellitus, venous insufficiency or arterial insufficiency
  • Wounds with copious drainage
  • Chronic wounds that have not responded to other treatments
  • Acute or surgical wounds at high risk for infection

Where Can I Get A Negative Pressure Wound Therapy Machine For Home Use?

Aeroflow Healthcare can provide a NPWT machine, as well as foam and gauze wound dressing kits, combined with multiple drain options. Aeroflow Healthcare offers the Invia Liberty by Medela and the Avance by Medela therapy options. Patients looking for more information about NPWT home treatment should complete the qualify form on our website, or doctors can visit and click on Physician & Hospital Resources for more information.

When Is Negative Pressure Wound Therapy No Longer Necessary?

The best sign of treatment completion is when there are no clinical signs of active infection at the wound site. Your doctor will work with you to determine the most successful treatment plan. Any questions about discontinuing Negative Pressure Wound Therapy treatment should be discussed with your physician.

How Does A Negative Wound Pressure Therapy Machine Work?

Foam dressings applies mechanical forces to the wound to create an environment that promotes wound healing. These forces are known as macrostrain and microstrain.

Macrostrain is the visible stretch that occurs when negative pressure contracts the foam. It draws wound edges together, provides direct and complete wound bed contact, evenly distributes negative pressure, and removes infectious substances.

Microstrain is the microdeformation at the cellular level, which leads to cell stretch. It reduces edema, promotes perfusion, and promotes granulation tissue formation by facilitating cell migration and proliferation.

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