Effect of skin graft thickness on scar development in a porcine burn model

In this study, scar development and maturation were assessed in a porcine full-thickness burn model with immediate excision and split-thickness autograft coverage. Red Duroc pigs were treated with split-thickness autografts of varying thickness: 0.026in. (“thin”) or 0.058in. (“thick”). Additionally, the thin skin grafts were meshed and expanded at 1:1.5 or 1:4 to evaluate the role of skin expansion in scar formation. Overall, the burn-excise-autograft model resulted in thick, raised scars. Treatment with thick split-thickness skin grafts resulted in less contraction and reduced scarring as well as improved biomechanics. Thin skin autograft expansion at a 1:4 ratio tended to result in scars that contracted more with increased scar height compared to the 1:1.5 expansion ratio. All treatment groups showed Matrix Metalloproteinase 2 (MMP2) and Transforming Growth Factor β1 (TGF-β1) expression that increased over time and peaked 4 weeks after grafting. Burns treated with thick split-thickness grafts showed decreased expression of pro-inflammatory genes 1 week after grafting, including insulin-like growth factor 1 (IGF-1) and TGF-β1, compared to wounds treated with thin split-thickness grafts. Overall, the burn-excise-autograft model using split-thickness autograft meshed and expanded to 1:1.5 or 1:4, resulted in thick, raised scars similar in appearance and structure to human hypertrophic scars. This model can be used in future studies to stu...
Source: Burns - Category: Dermatology Source Type: research

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Authors: Germain L, Larouche D, Nedelec B, Perreault I, Duranceau L, Bortoluzzi P, Beaudoin Cloutier C, Genest H, Caouette-Laberge L, Dumas A, Bussière A, Boghossian E, Kanevsky J, Leclerc Y, Lee J, Nguyen MT, Bernier V, Knoppers BM, Moulin VJ, Auger FA Abstract Split-thickness skin autografts (AGs) are the standard surgical treatment for severe burn injuries. However, the treatment of patients with substantial skin loss is limited by the availability of donor sites for skin harvesting. As an alternative to skin autografts, our research group developed autologous self-assembled skin substitutes (SASSs), allo...
Source: European Cells and Materials - Category: Cytology Tags: Eur Cell Mater Source Type: research
[Image from unsplash.com]From Esaote launching its new ultrasound device to Nipro’s Infraredx launching in Japan, here are seven medtech stories we missed this week but thought were still worth mentioning. 1. Esaote launches new ultrasound devices Esaote announced in an Aug. 2 press release that it has launched its new MyLab X7, MyLab X6 and MyLab X5 ultrasound systems. The MyLab X7 offers faster and more reliable ultrasounds with intuitive usability and ergonomics. MyLab X5 has zero-click automatic that speeds up assessments and enhances image quality. 2. Bonesupport inks deal with MTF Biologics Bonesuppor...
Source: Mass Device - Category: Medical Devices Authors: Tags: 510(k) Catheters Diagnostics Food & Drug Administration (FDA) Hospital Care Imaging Regulatory/Compliance Software / IT Ultrasound Bonesupport Esaote InfraReDx Inc. ivwatch MedTech Mindshare Medical Modulated Imaging MTF Bi Source Type: news
In this study, scar development and maturation were assessed in a porcine full-thickness burn model with immediate excision and split-thickness autograft coverage. Red Duroc pigs were treated with split-thickness autografts of varying thickness: 0.026 in. (“thin”) or 0.058 in. (“thick”). Additionally, the thin skin grafts were meshed and expanded at 1:1.5 or 1:4 to evaluate the role of skin expansion in scar formation. Overall, the burn-excise-autograft model resulted in thick, raised scars. Treatment with thick split-thickness skin grafts resulted in less contraction and reduced scarring ...
Source: Burns - Category: Dermatology Source Type: research
ConclusionThis is the first report investigating the long-term outcome of a newly developed BCSG. BCSGs demonstrated comparable results with patients’ autografts, functional outcomes on self-reported questionnaires and excellent psychological states. Precaution given the extensive unexpected hyperpigmentation must be taken and a randomized controlled study is underway.
Source: Burns - Category: Dermatology Source Type: research
Publication date: August 2018Source: Burns, Volume 44, Issue 5Author(s): Alvin Wen Choong Chua, Yik Cheong Khoo, Thi Thu Ha Truong, Evan Woo, Bien Keem Tan, Si Jack ChongAbstractA 12-year retrospective review of severe burn patients who received cultured epithelial autografts (CEA) at the Singapore General Hospital Burns Centre from January 2005 to December 2016 was carried out. During this period, two different surgical modalities were employed to manage these burn injuries. In the earlier period, following early excision of the burn wounds, exposed surfaces were covered with a combination of split thickness skin autograf...
Source: Burns - Category: Dermatology Source Type: research
ConclusionThis is the first report investigating the long-term outcome of a newly developed BCSG. BCSGs demonstrated comparable results with patients’ autografts, functional outcomes on self-reported questionnaires and excellent psychological states. Precaution given the extensive unexpected hyperpigmentation must be taken and a randomized controlled study is underway.
Source: Burns - Category: Dermatology Source Type: research
Publication date: August 2018Source: Burns, Volume 44, Issue 5Author(s): Alvin Wen Choong Chua, Yik Cheong Khoo, Thi Thu Ha Truong, Evan Woo, Bien Keem Tan, Si Jack ChongAbstractA 12-year retrospective review of severe burn patients who received cultured epithelial autografts (CEA) at the Singapore General Hospital Burns Centre from January 2005 to December 2016 was carried out. During this period, two different surgical modalities were employed to manage these burn injuries. In the earlier period, following early excision of the burn wounds, exposed surfaces were covered with a combination of split thickness skin autograf...
Source: Burns - Category: Dermatology Source Type: research
In this study, scar development and maturation were assessed in a porcine full-thickness burn model with immediate excision and split-thickness autograft coverage. Red Duroc pigs were treated with split-thickness autografts of varying thickness: 0.026 in. (“thin”) or 0.058 in. (“thick”). Additionally, the thin skin grafts were meshed and expanded at 1:1.5 or 1:4 to evaluate the role of skin expansion in scar formation. Overall, the burn-excise-autograft model resulted in thick, raised scars. Treatment with thick split-thickness skin grafts resulted in less contraction and reduced scarring ...
Source: Burns - Category: Dermatology Source Type: research
Publication date: August 2018 Source:Burns, Volume 44, Issue 5 Author(s): Alvin Wen Choong Chua, Yik Cheong Khoo, Thi Thu Ha Truong, Evan Woo, Bien Keem Tan, Si Jack Chong A 12-year retrospective review of severe burn patients who received cultured epithelial autografts (CEA) at the Singapore General Hospital Burns Centre from January 2005 to December 2016 was carried out. During this period, two different surgical modalities were employed to manage these burn injuries. In the earlier period, following early excision of the burn wounds, exposed surfaces were covered with a combination of split thickness skin autografts (S...
Source: Burns - Category: Dermatology Source Type: research
Publication date: Available online 27 March 2018 Source:Burns Author(s): Takayuki Yamamoto, Hayato Iwase, Timothy W. King, Hidetaka Hara, David K.C. Cooper Half a million patients in the USA alone require treatment for burns annually. Following an extensive burn, it may not be possible to provide sufficient autografts in a single setting. Pig skin xenografts may provide temporary coverage. However, preformed xenoreactive antibodies in the human recipient activate complement, and thus result in rapid rejection of the graft. Because burn patients usually have some degree of immune dysfunction and are therefore at increased ...
Source: Burns - Category: Dermatology Source Type: research
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