Effects of the Lunwell® Nanotechnology-Based Silver Dressing on Infected Diabetic Foot Wounds: A Prospective Controlled Study

Diabetic foot ulcers are the complication of diabetes most frequently requiring hospitalization and carry very high treatment costs. Ulcers that fail to heal may lead to amputation of the foot or leg, causing permanent disability and major loss of working capacity. Neuropathy, vasculopathy and infection are the principal drivers of ulcer formation, and the bacteria encountered in these ulcers frequently show high antibiotic resistance. Locally acting wound care products are therefore of considerable importance.

Silver has been used in wound treatment since antiquity. Silver nanoparticles have broad antibacterial, antifungal and antiviral properties: they can penetrate bacterial cell walls, alter membrane structure, increase membrane permeability, generate reactive oxygen species and release silver ions that inhibit deoxyribonucleic acid replication, and may result in cell death. Nanotechnologically produced silver products are thought to achieve greater tissue penetration and anti-infective activity, which is also relevant to the biofilm layer formed by bacteria, a recognised barrier to healing that is highly resistant to conventional antimicrobial therapy.

This study evaluates the effects of a nanotechnologically produced, Turkish-manufactured silver-coated wound care dressing in diabetic foot ulcers, compared with conventional dressing using sterile saline-moistened gauze. Participants with a PEDIS grade 2 or grade 3 diabetic foot ulcer are allocated to the investigational dressing or to the conventional dressing. All participants receive routine diabetic foot care in addition to the assigned dressing. Wounds are assessed on days 0, 3, 7 and 21 by wound measurement, deep tissue culture and histopathological examination of tissue obtained at debridement.