Infection in acute burn wounds following the Bali bombings: a comparative prospective audit

Multidrug-Resistant Pathogens in Burn Wound, Prevention, Diagnosis, and Therapeutic Approaches (Conventional Antimicrobials and Nanoparticles)

Multidrug-resistant pathogens are one of the common causes of death in burn patients and have a high risk of nosocomial infections, especially pneumonia, urinary tract infections, and cellulitis. The role of prolonged hospitalization and empirical antibiotics administration in developing multidrug-resistant pathogens is undeniable. In the early days of admitting burn patients, Gram-positive bacteria were the dominant isolates with a more sensitive antibiotic pattern. However, the emergence of Gram-negative bacteria that are more resistant later occurs. Trustworthy guideline administration in burn wards is one of the strategies to prevent multidrug-resistant pathogens. Also, a multidisciplinary therapeutic approach is an effective way to avoid antibiotic resistance that involves infectious disease specialists, pharmacists, and burn surgeons. However, the emerging resistance to conventional antimicrobial approaches (such as systemic antibiotic exposure, traditional wound dressing, and topical antibiotic ointments) among burn patients has challenged the treatment of multidrug-resistant infections, and using nanoparticles is a suitable alternative. In this review article, we will discuss different aspects of multidrug-resistant pathogens in burn wounds, emphasizing the full role of these pathogens in burn wounds and discussing the application of nanotechnology in dealing with them. Also, some advances in various types of nanomaterials, including metallic nanoparticles, liposomes, hydrogels, carbon quantum dots, and solid lipid nanoparticles in burn wound healing, will be explained.

RSTNCOVID Burns: A multi-centre service evaluation and stakeholder survey of the impact of COVID-19 on burns care in England, Wales and Northern Ireland

As the UK entered the first wave of the COVID-19 pandemic, the National Health Service published consensus guidance to the UK burns services advising changes to the acute management of burns to allow the continuation of safe care while protecting limited hospital resources. We aimed to describe the demographics of burns service users, changes to clinical pathways and experiences of the burns team during the first wave of the COVID-19 pandemic. All burns services in the UK were invited to participate in a national collaborative, trainee-led study supported by the Reconstructive Surgery Trials Network. The study consisted of (1) a service evaluation of patients receiving burns treatment during the COVID-19 pandemic; (2) a multidisciplinary team survey. Analyses were descriptive and narrative depending on data types. Collaborators from 18 sites contributed data from burns MDT surveys and 512 patients. Patient demographics were consistent with typical burns patterns in the UK. The delayed presentation occurred in 20% of cases, with 24 patients developing complications. MDT surveys indicated substantial adaptations and challenges as a result of the pandemic. Access to theatres and critical care were limited, yet a comprehensive acute burns service was maintained. Telemedicine was utilised heavily to reduce patient footfall. Adaptations in the provision of burns care, including greater outpatient care and telemedicine, have emerged out of necessity with reported success. The impact of reduced scar therapy and psychological interventions for burns patients during the pandemic requires longer-term follow-up. Lessons from the UK experience can be used to strategise for future pandemics.

The impact and lessons learnt from the COVID-19 pandemic on a UK Burns Centre

The COVID-19 pandemic has dramatically impacted healthcare provision in the UK and burns services have had to adapt to ensure the continuity of a safe care. As we return to “normality” we reflect on lessons learnt from our response to this pandemic.

A service evaluation was performed from patient notes between March 23rd and May 8th 2020 and an anonymous survey given to patients attending outpatient appointments.

258 patients were referred to our burns service and 148 patients completed the survey. Eleven burns were caused by treatment or prevention of COVID-19. Patients delayed seeking medical attention due to concern of catching COVID-19 (36% adults, 8% children). There was a delay in referral of 17 patients despite them fulfilling the referral criteria. Infection rates were higher following delayed presentation (21% vs 6%). The majority of burns were managed conservatively (237/258). Dressing changes were performed at home by 32% of patients. The outreach team treated 22 patients.

During the pandemic telemedicine has improved the efficiency of outpatient burn care and outreach nurses have enabled treatment of vulnerable patients. More must be done to raise public awareness of preventable causes of burn injury and to reassure them to seek help when burns occur.

A Descriptive Study of the Temporal Patterns of Volume and Contents Change in Human Acute Burn Edema: Application in Evidence-Based Intervention and Research Design

Edema after burn contributes significantly to burn wound depth conversion. In humans after burn injury, there is a lack of detailed understanding of the contents and temporal changes in volume of acute tissue edema. The novel findings of these studies relate to the collection of edema fluid after partial-thickness burn injury. Edema volume peaks on day 1 after burn without formal fluid resuscitation. The studies indicated that the peak was on day 2 for a resuscitated burn. In contrast, animal studies suggest that the peak of edema occurs by or before day 1 after injury. The findings confirm the pitfalls of evidence derived from animal models and assuming direct transference to humans. Postburn edema was demonstrated to be a high-protein fluid (ie, ≥10 g/L) for the duration of the inflammatory period. The presence of high-protein edema presents greater challenges to clinicians developing novel treatment options. The rate of volume change over time tapered to insignificant levels after day 4 following burn. Greater than 98% of the edema contents was fluid. However, the size of particulate matter did not preclude it passing through patent lymphatic collectors. The results indicate a necessity for urgent postburn intervention, which should incorporate the active stimulation of the lymphatic system to improve efficacy of edema removal.

Gram negative wound infection in hospitalised adult burn patients--systematic review and metanalysis-

BACKGROUND

Gram negative infection is a major determinant of morbidity and survival. Traditional teaching suggests that burn wound infections in different centres are caused by differing sets of causative organisms. This study established whether Gram-negative burn wound isolates associated to clinical wound infection differ between burn centres.

METHODS

Studies investigating adult hospitalised patients (2000-2010) were critically appraised and qualified to a levels of evidence hierarchy. The contribution of bacterial pathogen type, and burn centre to the variance in standardised incidence of Gram-negative burn wound infection was analysed using two-way analysis of variance.

PRIMARY FINDINGS

Pseudomonas aeruginosa, Klebsiella pneumoniae, Acinetobacter baumanni, Enterobacter spp., Proteus spp. and Escherichia coli emerged as the commonest Gram-negative burn wound pathogens. Individual pathogens' incidence did not differ significantly between burn centres (F (4, 20) = 1.1, p = 0.3797; r2 = 9.84).

INTERPRETATION

Gram-negative infections predominate in burn surgery. This study is the first to establish that burn wound infections do not differ significantly between burn centres. It is the first study to report the pathogens responsible for the majority of Gram-negative infections in these patients. Whilst burn wound infection is not exclusive to these bacteria, it is hoped that reporting the presence of this group of common Gram-negative "target organisms" facilitate clinical practice and target research towards a defined clinical demand.

Does the type of skin replacement surgery influence the rate of infection in acute burn injured patients?

INTRODUCTION

Infection is a major cause of morbidity and mortality following burn. Early debridement and wound closure minimize the risk of infection. This study aimed to examine the association of surgical modalities with burn wound infection (BWI) rate, graft loss and length of stay (LOS) outcome.

METHOD

This study is a retrospective analysis of all patients undergoing surgical intervention at the Royal Perth Hospital between 2004 and 2011. Multivariable regression analyses were used to predict the impact of burn and patient factors on the outcomes.

RESULTS

Seven hundred seventy patients were eligible for inclusion with 74.8% males and a mean total body surface area (TBSA) burnt of 7.9% (range 1.0-75). Sixty-seven patients (8.7%) had positive post-operative swabs indicating potential wound infection. Age and TBSA significantly increased the risk of BWI (confirmed by quantitative swab). Positive microbiology was not associated with surgery type. Age, TBSA, diabetes and surgical modalities had significant influence on LOS in hospital. Only TBSA was an independent predictor of graft loss.

CONCLUSION

Age, TBSA and diabetes were associated with poorer outcomes after burn. Surgery type was not associated independently with the risk of infection.

Explosions and human health: the long-term effects of blast injury

The immediate patterns of injury from explosions are well documented, from both military and civil experience. However, few studies have focused on less immediately apparent health consequences and latent effects of explosions in survivors, emergency responders and the surrounding community. This review aimed to analyze the risks to health following an explosion in a civil setting. A comprehensive review of the open literature was conducted, and data on 10 relevant military, civilian and industrial events were collected. Events were selected according to availability of published studies and involvement of large numbers of people injured. In addition, structured interviews with experts in the field were conducted, and existing national guidelines reviewed. The review revealed significant and potentially long-term health implications affecting various body systems and psychological well-being following exposure to an explosion. An awareness of the short- and long-term health effects of explosions is essential in screening for blast injuries, and identifying latent pathologies that could otherwise be overlooked in stressful situations with other visually distracting injuries and, often, mass casualties. Such knowledge would guide responsible medical staff in implementing early appropriate interventions to reduce the burden of long-term sequelae. Effective planning and response strategies would ensure accessibility of appropriate health care resources and evidence-based information in the aftermath of an explosion.

Burn Disasters—An Audit of the Literature

All events that result in disasters are unique, and it is impossible to become fully prepared. However, through thorough planning and preparedness, it is possible to gain a better understanding of the typical injury patterns and problems that arise from a variety of hazards. Such events have the potential to claim many lives and overwhelm local medical resources. Burn disasters vary in scope of injury and procedures required, and are much more labor and resource intensive than non-burn disasters.

This review of the literature should help determine whether, despite each event having its own unique features, there still are common problems disaster responders face in the prehospital and hospital phases, what recommendations were made from these disasters, and whether these recommendations have been implemented into practice and the current disaster planning processes.

The objective of this review was to assess: (1) prehospital and hospital responses used during past burn disasters; (2) problems faced during those disaster responses; (3) recommendations made following those disasters; (4) whether these recommendations were integrated into practice; and (5) the key characteristics of burn disasters and how they differ from other disasters. This review is important to determine why, despite having disaster plans, things still go wrong.

Bacteriology of infected burn wounds in the burn wards of a teaching hospital in Southwest Nigeria

BACKGROUND

Burns are characterized by the loss of varying proportions of the protective layers of the skin, depression of immune responses, and increased wound susceptibility to infection. Wound infection is a major cause of morbidity and mortality in burn cases. This study characterizes those factors that predispose burn wounds to infection and the bacteriology of the microorganisms in our environment.

PATIENTS AND METHODS

Prospective study of burns patients that were admitted and treated at the Lagos State University Teaching Hospital (LASUTH), Ikeja-Lagos, Nigeria between January 1 and May 31, 2010 was carried out. Information about the demographics, aetiology/mechanism of burns, interval between the time of injury and admission, microbial studies, and antibiotic therapy were collected and analyzed.

RESULTS

A total of 74 patients consisting of 43 males and 31 females were seen. The ages range between one week and 95 ± 22.42 years. Wound infections were confirmed in 28 patients (infection rate of 37.84 per 100 patients). Delayed presentation at LASUTH and length of hospital stay were significantly related to the development of wound infection. Pseudomonas aeruginosa and Proteus mirabilis were the most common infective organisms occurring in 53.6 and 10.7 percentages respectively. The isolated organisms were resistant to the beta-lactam antibiotics and mostly sensitive to carbapenem and aztreonam preparations.

CONCLUSION

Factors predisposing to invasive wound infections in our environment were highlighted and suggestions made on methods that could reduce the infections and thus reduce morbidity and mortality in burns.

Measurement of acute edema shifts in human burn survivors--the reliability and sensitivity of bioimpedence spectroscopy as an objective clinical measure

Improvements in treatment for acute burn edema have stalled in comparison with other areas of burn care. Designing acute edema treatment studies in humans is hindered by the lack of objective, sensitive methods of measurement in the burn population. Bioimpedence spectroscopy (BIS) is a noninvasive method of measuring fluid volumes in the body. The aim of this study was to examine the reliability and sensitivity of BIS in the measurement of acute edema shifts in burn survivors, including assessment across different wound conditions. BIS measurements were collected in triplicate from 21 burn patients in total. Phase I (n = 13) examined BIS under three different dressing conditions. Phase II (n = 8) considered only patients with dressings intact. Sensitivity (minimum detectable difference [MDD]) was examined with total body water, extracellular fluid (ECF), and intracellular fluid volume measurements. BIS demonstrated excellent reliability across all dressings conditions, including when open wounds were present (intraclass correlation coefficient = 0.975-1.00, 95% confidence intervals = 0.938-1.00). Clinically useful levels of sensitivity, or MDD, were calculated. BIS MDD for total body water (open wounds) = 360 ml, ECF (open wounds) = < or = 10 ml, ECF (new dressings) = 540 ml, and intracellular fluid (open wounds) = 310 ml. BIS analysis is clinically applicable for real-time, noninvasive monitoring of whole-body fluid shifts in acute burn survivors with < or = 30% TBSA.