Negative Pressure Wound Therapy (NPWT) is a treatment widely used to promote the healing of various types of skin injuries, like diabetic foot ulcers, pressure ulcers, and acute or chronic wounds. This therapy method is especially beneficial for wounds that aren’t healing properly or quickly, including those with high levels of exudate or dead tissue.
NPWT is often recommended to complement the treatment of large wounds, wounds associated with diabetes, and those that happen after split-thickness skin grafts. NPWT systems may also be used to effectively manage wounds with exposed bone or tendon, and those with a high risk of infection.
How do negative pressure wound treatment methods accelerate healing?
Vacuum-assisted closure is a technique used in NPWT that utilizes a suction pump, tubing, and specialized dressings to efficiently remove excess exudate and facilitate the healing process. But while NPWT is a widely accepted wound care method, the exact mechanisms that make it effective are only partially understood.
We do know that NPWT accelerates wound healing by creating a sub-atmospheric environment around the wound, which optimizes the conditions necessary for tissue repair. That controlled application of negative pressure reduces edema and promotes angiogenesis—in turn, enhancing local blood flow. The increase in blood flow continually delivers oxygen and essential nutrients to the wound bed, feeding granulation tissue formation. Then, as new tissue grows, NPWT helps to consistently contract the wound edges, decreasing the wound size for a more successful closure.
The small amount of mechanical stress negative pressure wound treatment places on the wound also gently stretches the tissue, which promotes matrix molecule synthesis and cell proliferation. Plus, NPWT removes wound fluids that interrupt healing, which helps to maintain a controlled healing environment.
Regardless of the wound type, size, or location, these factors work together to minimize the risk of infection, support the body’s natural recovery mechanisms, and help the wound heal.
Dakin’s Solution gives NPWT an extra boost in healing acute and chronic wounds
NPWT works most effectively when the wound is adequately prepared by cleaning and debriding any necrotic tissue or debris before starting VAC-assisted therapy. This pre-step helps to minimize the risk of infectious material getting trapped in the wound, leading to tunnel wounds or undermining wounds that trigger more serious complications.
Dakin’s Solution plays a pivotal role in NPWT by significantly reducing the bacterial load in and around the wound, creating a more sterile environment that’s conducive to healing. As a debriding agent, Dakin’s wound cleansers rinse away exudate, necrotic tissue, and debris, so the wound bed is prepared for negative pressure therapy.
In a pilot research study published in the International Wound Journal, researchers studied 15 adult patients with open, infected wounds to test the efficacy of vacuum-assisted closure therapy paired with intermittent wound cleansing using a topical wound solution. Compared to the control group that only received wet-to-moist dressing changes, the patients that received NPWT plus routine wound cleansing required fewer hospital days of wound treatment and were discharged sooner. They also experienced fewer days of infection and faster wound closure with a shorter duration of treatment.
Using Dakin’s Solution for instillation with negative pressure wound therapy
Some medical professionals use Dakin’s Solution as a wound cleansing agent before or during NPWT, but it has also been shown to be effective as an instillation agent, delivering fluid directly to the wound bed through the NPWT system. This method can be performed in various settings, including a wound clinic, where specialized wound management care is available.
In one NPWT study, five patients with venous stasis ulcers were treated with Dakin’s Solution as an irrigant, which led to favorable healing results.
In another study involving 16 chronic lower leg and foot wounds, patients were divided into two groups: one treated with negative pressure wound therapy alone (called the NPWT group) and the other with NPWT combined with the instillation of a quarter-strength bleach solution (called the NPWTi group). The NPWTi group showed a statistically significant reduction in bacterial bioburden, while the NPWT group experienced a mean increase in bacterial load. These results highlight how NPWT is more effective in treating complex wounds when paired with an instillation agent like Dakin’s Solution.
Promote complete wound healing with Dakin’s
Dakin’s Solution, with its stable shelf life, overall cost effectiveness, and proven efficacy in reducing bacterial load, is an invaluable companion to negative pressure therapy.
Whether used in the initial debridement phase, as a soak for wet-to-moist wound dressing systems, or as an instillation agent during NPWT, Dakin’s helps create an optimal healing environment where even the most challenging wounds are given a fighting chance.
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