Surg Technol Int. 2014 Nov;25:45-52
Increased bacterial burden and formation of biofilm has been
recognized as one of the key factors contributing to delayed wound healing.
There is a toolbox of topical antimicrobial wound dressings that incorporate
silver, iodine, polyhexamethylene biguanide, methylene blue/gentian violet, and
honey. This article reviews a diverse range of evidence to discuss the
advantages and disadvantage of topical antimicrobial dressings. Discussion will
provide guidance on when and how to use topical antimicrobial dressings to
achieve optimal outcomes and cost-effective wound care. Chronic wounds do not
follow a predictable and expected healing trajectory, and they may persist for
months or years due to underlying disease processes, recurrent injury, and
comorbidities.1 With an aging population and increased prevalence of chronic
diseases, the majority of wounds are refractory to healing, placing a
significant burden on the health system and individual patients. Bacterial
burden and biofilm have been recognized as key factors contributing to
persistent inflammation, tissue destruction, delayed wound healing, and other
serious complications (especially in individuals who are frail and
immune-compromised).2 It has been demonstrated that when bacterial growth
reaches a critical threshold of 105 bacteria per gram of tissue, bacterial
toxins can cause tissue damage in the superficial wound compartment, delaying
healing.2 In the literature, this phenomenon is referred to as critical
colonization, increased bacterial burden, superficial infection, or localized
infection. According to a recent review, over 50% of chronic wounds exhibit
signs and symptoms that are consistent with localized infection.3.
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