Abstract:

Traditional negative pressure wound therapy (NPWT) has revolutionized the treatment of complex wounds for nearly 20 years. A decade ago, a modification of the original system added intermittent automated installation of topical wound irrigation solutions to traditional negative pressure wound therapy. This combined therapy, termed negative pressure wound therapy with instillation (NPWTi), has been shown to be effective in the treatment of a variety of complex wounds. Negative pressure wound therapy with instillation has been shown to reduce bioburden and biofilms present in wounds helping heal clinically infected wounds. It has also been used with success to jump-start stalled wounds, in relieving wound pain and treating infected foreign bodies including infected orthopedic hardware and some types of exposed abdominal wall mesh. The system includes a foam dressing placed in the wound covered by a semi-occlusive drape. A tubing placed over a hole cut in the drape connects the foam dressing to a pump run by a computerized micro-processor that delivers negative pressure to the dressing and wound. A preset volume of instillation fluid is automatically delivered via the instillation tubing to the wound. The fluid is held in the foam to bath the wound for a predetermined time period. Negative pressure is then re-started draining the irrigation fluid and any wound exudate into a collection canister. The entire sequence is automated and consists of three phases: (1) fluid instillation; (2) holding the fluid for a period of time in the wound which is fully expanded since the negative pressure is off during this phase; and then (3) a cycle of continuous negative pressure. The entire sequence repeats itself automatically. Typically the dressing is changed three times a week. The variables involved in treating patients with negative pressure wound therapy with instillation include: the indicated wound types; the system settings; the choice of the irrigation solution and the duration of therapy. This article will serve as a reference to help the clinician navigate through treating patients with NWTi from patient selection, system settings to the completion of therapy.

Authors:

Tom A. Wolvos MSc, MD, FACS , Chairman of the Division of General Surgery, Scottsdale Healthcare Osborn Medical Center , Scottsdale, Arizona USA

PMID:  24574014

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