Creation of rapid and reproducible burn in animal model with a newly developed burn device. Issue 5 (August 2020)

• Record Type: Journal Article
• Authors: Shukla, Sandeep Kumar; Sharma, Ajay Kumar; Shaw, Priyanka; Kalonia, Aman; Yashavarddhan, M.H.; Singh, Sukhvir
• Is Part Of: Burns. Volume 46:Issue 5(2020)
• Page Start: 1142
• Page End: 1149
• Publication Date: 2020-08
• Subjects: Burn -- Animal model -- Histology -- Vascular perfusion -- Burn wound; Burns and scalds -- Periodicals; 617.11
• DOI: 10.1016/j.burns.2019.12.005
• Languages: English
• ISSNs: 0305-4179

Abstract

Graphical abstract: Schematic representation of burn wound generation on animal model with Instaburn device. Highlights: A new device is developed for generation of uniform and reproducible burn wound in animal model. This device allows creation of burn wounds of different sizes with precise partial thickness due to its custom made interchangeable heating rods. Burn wound is generated in the animals at different temperature of 60 °C, 80 °C and 100 °C to determine burn injury characteristics and validation of device. Histology of skin biopsy samples and blood vessels pattern clearly demonstrated the temperature dependent changes. Device successfully demonstrates burn wound generation in animal models. Abstract: Background: The currently available practices for creation of burns in the animals are mostly manual which may lead to lack of uniform wound. There is a need to develop a suitable device that could reproduce and uniformly create burn wound in animal models without the procedural variations and human variability. Present study deals with development of a burn device which has been designed for creation of animal models for burn injury. Methods: The designed burn device comprises of two main components a heating metal stylus and the thermal sensor. Metal stylus consists of two parts with top part acts as handle and bottom part contains the aluminum probe which quickly heats and cool. The temperature monitoring sensor is attached adjacent to the tip of the probe. The temperature and timer are digitally displayed and can be adjusted as per the requirement. This device is tested for creation of uniform burn in the mice model. Animals were divided into different groups and thermal burn was generated for 60 °C, 80 °C & 100 °C respectively. Burn wound was generated dorsally on shaved skin with contact time of 40 s. Skin biopsies of burn wound were collected after 24 h for histopathology analysis to determine the burn characteristics. Blood vessels damage in the skin was detected by transillumination and digital segmentation using VesSeg tool. Results: The device is able to deliver the different temperature to the animal skin. After reaching the 60 °C, 80 °C & 100 °C for 40 s respectively electronic relays shut down the device. The different groups of the animals showed significant difference in burn morphology in temperature dependent manner. Non significant variation in the burn area of different experimental groups animals was observed. All three zones vis-a-vis coagulation, stasis and hyperaemia were observed at 100 °C whereas found indistinct in 80 °C and 60 °C treated groups. Histopathological studies clearly demonstrated the differences in damage induction in stratum corneum, epidermis, dermis, collagen and hair follicle at selected thermal points. Severe blood vessels damage was observed only at 100 °C. The vascular perfusion was recorded 14% and 57% higher in 60 °C and 80 °C treated animals respectively when compared to control animals. However, at 100 °C due to highest vessel damage the perfusion was reduced to 53% compared to control. Conclusion: Present study demonstrates that the device is able to generate precise and uniform burn wound in mice model. The device may be useful for burn related studies and validation of burn wound care products.