Heightened levels of microvesicle particles resulting from combination of ethanol and thermal burn injury

Abstract Objective Burn wound progression is an inflammation driven process where an initial partial-thickness thermal burn wound can evolve over time to a full-thickness injury. We have developed an oil-in-water nanoemulsion formulation (NB-201) containing benzalkonium chloride for use in burn wounds that is antimicrobial and potentially inhibits burn wound progression. We used a porcine burn injury model to evaluate the effect of topical nanoemulsion treatment on burn wound conversion and healing. Methods Anesthetized swine received thermal burn wounds using a 25cm 2 surface area copper bar heated to 80 oC. Three different concentrations of NB-201 (10%, 20%, or 40% nanoemulsion), silver sulfadiazine cream or saline were applied to burned skin immediately after injury and on days 1, 2, 4, 7, 10, 14, and 18 post-injury. Digital images and skin biopsies were taken at each dressing change. Skin biopsy samples were stained for histological evaluation and graded. Skin tissue samples were also assayed for mediators of inflammation. Results Dermal treatment with NB-201 diminished thermal burn wound conversion to a full-thickness injury as determined by both histological and visual evaluation. Comparison of epithelial restoration on day 21 showed that 77.8% of the nanoemulsion treated wounds had an epidermal injury score of 0 compared to 16.7% of the silver sulfadiazine treated burns (p=0.01). Silver sulfadiazine cream and saline treated wounds (controls) converted to full-thickness burns by day 4. Histological evaluation revealed reduced inflammation and evidence of skin injury in NB-201 treated sites compared to control wounds. The nanoemulsion treated wounds often healed with complete regrowth of epithelium and no loss of hair follicles (NB-201: 4.8±2.1, saline: 0±0, silver sulfadiazine: 0±0 hair follicles per 4mm biopsy section, p<0.05). Production of inflammatory mediators and sequestration of neutrophils were also inhibited by NB-201. Conclusions Topically applied NB-201 prevented the progression of a partial-thickness burn wound to full-thickness injury and was associated with a concurrent decrease in dermal inflammation.

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Burns and Electrical Injuries

Mayo Clinic Critical and Neurocritical Care Board Review ◽

10.1093/med/9780190862923.003.0065 ◽

2019 ◽

pp. 409-414

Author(s):

Brandon T. Nokes ◽

Ayan Sen

Keyword(s):

Critical Care ◽

Surface Area ◽

Body Surface ◽

Burn Injury ◽

Total Body Surface Area ◽

Burn Injuries ◽

Burn Severity ◽

Thermal Burn ◽

Total Body ◽

Electrical Injuries

Burn injuries may cause morbidity and death, and patients may have widely variable presentations and outcomes. This chapter focuses on the critical care aspects of burn injury and management issues of burn and electrical injuries. Burns are classified according to the amount of total body surface area (TBSA) affected, the depth of burn, and the type of exposure associated with the burn. More specifically, burns can be chemical, electrical, or thermal. Burn severity is determined by the depth of involvement.

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The Cutaneous Inflammatory Response to Thermal Burn Injury in a Murine Model

International Journal of Molecular Sciences ◽

10.3390/ijms20030538 ◽

2019 ◽

Vol 20 (3) ◽

pp. 538 ◽

Cited By ~ 13

Author(s):

Zabeen Lateef ◽

Gabriella Stuart ◽

Nicola Jones ◽

Andrew Mercer ◽

Stephen Fleming ◽

...

Keyword(s):

Inflammatory Response ◽

Murine Model ◽

Burn Injury ◽

Thermal Burn ◽

Dermal Thickness ◽

Collagen Iii ◽

M1 Phenotype ◽

Macrophage Populations ◽

Inflammatory Response To Injury ◽

Heated Metal

Many burn interventions aim to target the inflammatory response as a means of enhancing healing or limiting hypertrophic scarring. Murine models of human burns have been developed, but the inflammatory response to injury in these models has not been well defined. The aim of this study was to profile inflammatory cell populations and gene expression relative to healing and scarring in a murine model of thermal burns. Cutaneous injuries were created on the dorsal region of C57Bl/6 mice using a heated metal rod. Animals were euthanized at selected time points over ten weeks, with the lesions evaluated using macroscopic measurements, histology, immunofluorescent histochemistry and quantitative PCR. The burn method generated a reproducible, partial-thickness injury that healed within two weeks through both contraction and re-epithelialization, in a manner similar to human burns. The injury caused an immediate increase in pro-inflammatory cytokine and chemokine expression, coinciding with an influx of neutrophils, and the disappearance of Langerhans cells and mast cells. This preceded an influx of dendritic cells and macrophages, a quarter of which displayed an inflammatory (M1) phenotype, with both populations peaking at closure. As with human burns, the residual scar increased in size, epidermal and dermal thickness, and mast cell numbers over 10 weeks, but abnormal collagen I-collagen III ratios, fibre organization and macrophage populations resolved 3–4 weeks after closure. Characterisation of the inflammatory response in this promising murine burn model will assist future studies of burn complications and aid in the preclinical testing of new anti-inflammatory and anti-scarring therapies.

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Myoglobinemia after burn injury: relationship to creatine kinase activity in serum.

Clinical Chemistry ◽

10.1093/clinchem/32.5.857 ◽

1986 ◽

Vol 32 (5) ◽

pp. 857-859 ◽

Cited By ~ 5

Author(s):

J Guechot ◽

N Lioret ◽

L Cynober ◽

C Letort ◽

R Saizy ◽

...

Keyword(s):

Creatine Kinase ◽

Muscle Damage ◽

Biological Markers ◽

Kinase Activity ◽

Burn Injury ◽

Creatine Kinase Activity ◽

Burn Patients ◽

Thermal Burn ◽

Burn Depth

Abstract Myoglobin is released into the blood after burn injury. We measured it and other analytes in blood collected from 22 burn patients two to seven times during their recovery. There was a significant correlation between myoglobinemia and creatine kinase (CK) activity in serum (r = 0.764; p less than 0.001). In a group of 14 thermal-burn subjects a correlation was found between burn depth (clinically expressed as Unit Burn Surface) and both myoglobinemia (r = 0.825; p less than 0.01) and CK activity (r = 0.686; p less than 0.01). In eight thermal-burn patients who were recovering satisfactorily, myoglobin and CK activity measured on days 2, 4, 7, 10, and 13 after injury were significantly increased (p less than 0.05) on days 2, 4, and 7. Evidently myoglobinemia and CK activity are good biological markers of burn depth, and reflect muscle damage equally well.

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664 Risk Factors for the Development of Transaminitis in Pediatric Burn Patients Treated with Oxandrolone

Journal of Burn Care & Research ◽

10.1093/jbcr/iraa024.280 ◽

2020 ◽

Vol 41 (Supplement_1) ◽

pp. S177-S177

Author(s):

Kate Pape ◽

Sarah Zavala ◽

Rita Gayed ◽

Melissa Reger ◽

Kendrea Jones ◽

...

Keyword(s):

Risk Factors ◽

Length Of Stay ◽

Pediatric Patients ◽

Burn Injury ◽

Total Body Surface Area ◽

Future Research ◽

Burn Patients ◽

Thermal Burn ◽

Increased Risk ◽

Significant Difference

Abstract Introduction Oxandrolone is an anabolic steroid that is the standard of care for burn patients experiencing hypermetabolism. Previous studies have demonstrated the benefits of oxandrolone, including increased body mass and improved wound healing. One of the common side effects of oxandrolone is transaminitis, occurring in 5–15% of patients, but little is known about associated risk factors with the development of transaminitis. A recent multicenter study in adults found that younger age and those receiving concurrent intravenous vasopressors or amiodarone were more likely to develop transaminitis while on oxandrolone. The purpose of this study was to determine the incidence and identify risk factors for the development of transaminitis in pediatric burn patients receiving oxandrolone therapy. Methods This was a multicenter, retrospective risk factor analysis that included pediatric patients with thermal burn injury (total body surface area [TBSA] > 10%) who received oxandrolone over a 5-year time period. The primary outcome of the study was the development of transaminitis while on oxandrolone therapy, which was defined as aspartate aminotransferase (AST) or alanine aminotransferase (ALT) >100 mg/dL. Secondary outcomes included mortality, length of stay, and change from baseline ALT/AST. Results A total of 55 pediatric patients from 5 burn centers met inclusion criteria. Of those, 13 (23.6%) developed transaminitis, and the mean time to development of transaminitis was 17 days. Patients who developed transaminitis were older (12 vs 6.4 years, p = 0.01) and had a larger mean %TBSA (45.9 vs 34.1, p = 0.03). The odds of developing transaminitis increased by 23% for each 1 year increase in age (OR 1.23, CI 1.06–1.44). The use of other concurrent medications was not associated with an increased risk of developing transaminitis. Renal function and hepatic function was not associated with the development of transaminitis. There was no significant difference in length of stay and mortality. Conclusions Transaminitis occurred in 23.6% of our study population and was associated with patients who were older and had a larger mean %TBSA burn. Older pediatric patients with larger burns who are receiving oxandrolone should be closely monitored for the development of transaminitis. Applicability of Research to Practice Future research is needed to identify appropriate monitoring and management of transaminitis in oxandrolone-treated pediatric burn patients.

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Iatrogenic thermal burn after hot water immersion for weever fish sting treatment: a case report

Scars Burns & Healing ◽

10.1177/2059513120944045 ◽

2020 ◽

Vol 6 ◽

pp. 205951312094404

Author(s):

Khairun Izlinda Abdul Jalil ◽

Muhammad Tayyab Qayyum

Keyword(s):

Severe Pain ◽

Burn Injury ◽

Water Immersion ◽

Hot Water ◽

Wound Irrigation ◽

Thermal Burn ◽

Main Symptom ◽

Upper Limit ◽

Saltwater Fish ◽

Hot Water Immersion

Introduction: Lesser weever fish are saltwater fish that are found on the Mediterranean and European coasts, over sandy and muddy seabed areas, typically around the summer season. These bottom dwellers have envenoming dorsal spines that sting when stepped on. Severe pain is the main symptom. Initial treatment involves wound irrigation, removal of spines if they are visible and immediate hot water immersion (HWI). Tetanus prophylaxis, leg elevation and analgesia are recommended after pain subsides. HWI treatment is described as immersion of the affected area in hot, but not scalding, water to tolerance (upper limit 45 °C) for 30–90 min or until there is significant pain relief. While HWI is an effective therapy for the pain control of marine envenomation, it presents a potential risk of thermal burn injury in the untrained or unsupervised. Here, we present a case of an iatrogenic thermal burn after HWI for the treatment of a weever fish sting. Case report: A 16-year-old girl was referred to our outpatient department with a superficial dermal thickness burn to her big toe 12 days after accidental stepping on a lesser weever fish. She reported receiving HWI treatment at the scene of the injury. She was treated with dressing, oral antibiotics and leg elevation. This healed with no sequalae at nine-month follow-up. Conclusion: Thermal burn injury can occur after HWI treatment. Providers should be aware and diligent while the patient needs to be educated in the potential risks. Lay Abstract 5, e, s Stings from lesser weever fish occur mostly in the summer months. These bottom dweller saltwater fish are found in the Mediterranean and European coasts, over sandy and muddy seabed areas; it releases venom from its dorsal spine when stepped on. Severe pain is the main symptom. Recommended first aid includes wound irrigation, removal of spines if they are visible and immediate hot water immersion (HWI) treatment. HWI means immersion of the affected part into hot, but not scalding, water (upper limit 45 °C) for 30–90 min or until pain is alleviated. In an ideal situation, the water temperature should be checked with a thermometer. However, in practice, where no thermometer is available, the water must be tested before immersion. It is advised to ensure that the water should be no hotter than the first aider can stand or the highest temperature tolerable by the patient. However, HWI treatment has a potential risk of burn injury. Here we describe a case of a 16-year-old patient who sustained burn injury after HWI therapy received after a sting by a weever fish. The patient was treated with dressings and the wound healed without requiring surgical intervention. Here, we like to highlight that although HWI is effective in treating stings from marine animals, both the provider and the patient need to be aware of potential burn injury associated with this treatment.

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