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Low intensity ultrasound therapy induces angiogenesis and persistent inflammation in the chronic phase of the healing process of third degree burn wounds experimentally induced in diabetic and non-diab…

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Title
Low intensity ultrasound therapy induces angiogenesis and persistent inflammation in the chronic phase of the healing process of third degree burn wounds experimentally induced in diabetic and non-diabetic rats1
Published in
Acta Cirúrgica Brasileira, July 2016
DOI 10.1590/s0102-865020160070000006
Pubmed ID
Authors

Marcelo Silva Fantinati, Diego Eterno Oliveira Mendonça, Adriana Márcia Monteiro Fantinati, Bruno Flamarion dos Santos, Juliana Cristina Oliveira Reis, Cristina Lopes Afonso, Marina Clare Vinaud, Ruy de Souza Lino

Abstract

To evaluate the effects of low intensity ultrasound on the healing process of third degree burn wounds in experimentally induced diabetic Wistar rats. One hundred rats were divided into: control group; non-diabetic treated group; diabetic control group; diabetic treated group. The therapy was performed with a 3MHz ultrasound application, pulsed emission at 100Hz frequency, modulated at 20% with a dosage of 0.5W/cm2 during three minutes throughout 30 days. The surgical debridement of the wound was performed once at day 2. The wounds were morphometrically, macroscopically and microscopically evaluated at 3, 7, 14, 21 and 30 days. The wound contraction and collagen quantification were higher in all treated groups. Macroscopically, necrosis was higher in the diabetic control group. Granulation tissue was higher in treated groups during the proliferative and remodeling phase. Microscopically, there were greater mononuclear inflammatory infiltration, angiogenesis and fibroblast quantification in treated groups during the proliferative and remodeling phases. therapeutic ultrasound is beneficial in the inflammatory and proliferative phases of the healing process because it controlled the necrotic tissue, increased the granulation tissue and wound contraction. However in the remodeling phase it is not beneficial because of the continued angiogenesis and a mononuclear inflammatory infiltration.

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Geographical breakdown

Country Count As %
Spain 1 2%
Unknown 43 98%

Demographic breakdown

Readers by professional status Count As %
Student > Master 7 16%
Student > Ph. D. Student 4 9%
Student > Bachelor 3 7%
Unspecified 2 5%
Student > Doctoral Student 2 5%
Other 8 18%
Unknown 18 41%
Readers by discipline Count As %
Biochemistry, Genetics and Molecular Biology 3 7%
Physics and Astronomy 3 7%
Medicine and Dentistry 3 7%
Unspecified 2 5%
Immunology and Microbiology 2 5%
Other 9 20%
Unknown 22 50%