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The Effects of Negative Pressure Wound Therapy on Vegf and Angiogenesis in Deep Dermal Burn Injury: An Experimental Study.
Annals of Burns and Fire Disasters 2023 September
Burn injuries are the fourth most common type of trauma worldwide, after traffic injuries, falls and interpersonal violence. Vascular endothelial growth factor (VEGF) is one of the most critical proangiogenic factors. Failure in angiogenesis is often associated with chronic, non-healing wounds. This study aimed to compare the effect of sterile gauze with normal saline (NaCl) 0.9%, intermittent negative pressure wound therapy (NPWT), continuous NPWT, and silver sulfadiazine dressing on increasing VEGF and angiogenesis in deep dermal burn injury. This experimental laboratory study involved six Yorkshire pigs. Twenty burns were made on each pig's flank and dorsum areas, which were divided into four treatment groups: sterile gauze with NaCl 0.9%, intermittent NPWT, continuous NPWT, and silver sulfadiazine dressing. Skin biopsies were done on days 1, 3, 7, 14 and 21 to evaluate VEGF histoscore and mean microvascular density (MVD). We used immunohistochemical staining of VEGF-165 as VEGF's protein marker and hematoxylin-eosin (HE) to count the MVD. There was a significant difference in mean VEGF histoscore on evaluation day 14, in which continuous NPWT had the highest score compared to sterile gauze with NaCl 0.9%, intermittent NPWT, and silver sulfadiazine. The elevated VEGF histoscore could significantly increase the MVD.
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