The complexities of managing severe burns with associated trauma

The Development of Acute Kidney Injury in Burn Patients Undergoing Computed Tomography With Intravenous Contrast

Acute kidney injury (AKI) is a major complication of significant burn injuries and a significant cause of patient morbidity and mortality. Patients that sustain traumatic burn injuries may require computed tomography (CT) imaging as part of their initial trauma management. This multicenter retrospective chart review of patients admitted to two level I trauma centers with ≥10% TBSA burns between 2014 and 2017 aims to determine if patients with greater than 10% TBSA burns that received CT imaging with intravenous contrast were more likely to develop acute kidney injury during their admission. A total of 439 patients were included in the study. The average age was 45.3 years and average TBSA was 23.2%. Sixty-seven of the 439 patients underwent CT scans with IV contrast on admission. The rate of AKI between patients who did or did not receive CT scans was not statistically significant (9.1 vs 6.0%, P = 0.40). Patients who developed an AKI had higher TBSA (45.6 vs 21.1%, P < .01), amount of fluids per TBSA given within the first 24 hours (457.4 vs 321.6, P < .01), and mortality (71.1 vs 6.2%, P < .01) than those who did not develop an AKI. There was no significant difference in the development of acute kidney injury in burn patients who received CT scans with IV contrast on admission. Although there is a risk of contrast induced nephropathy, the risk is not increased in burn patients and this should not prevent a thorough evaluation to rule out additional life-threatening injuries in the burn trauma patient.

Thermo-mechanical combination injuries - A rare but life-threatening entity

Thermo-mechanical-combination-injuries (TMCI) are feared for their demanding preclinical and clinical management and bear the risk of high mortality compared to the single injury of a severe burn or multiple traumata. There remains a significant lack of standardized algorithms for diagnostics, and therapy of this rare entity. The aim of the present study was to profile TMCI aiming at standardized procedures. In this study, TMCI were extracted from our burn database of a level 1 burn and trauma centre. From 2004 to 2017, all patients with TMCI were retrospectively analyzed. Further inclusion criteria were multiple trauma accompanied by burn with ≥10% TBSA. Patient and injury characteristics including ISS and outcome parameter were analyzed. A total of 45 patients matched the selective inclusion criteria of TMCI comprising of 4% of all burn injuries during the period. Average age was 38 years (range: 14-86), with a mean TBSA of 43% (range: 10-97%). The mean recorded temperature at admission was 34.8°C (range: 29.6 - 37.1) with 2215 ml volume (range: 500 - 8000) administered preclinically in total. The mean ISS was 16. The overall mortality rate was 22%. TMCI are rare and life-threatening events which require highly qualified management in combined level 1 trauma and burn centres to adress both burn and trauma treatment. The multiple injury pattern is diverse, complicating standardized management in view of burn care specific measures, as normothermia and restrictive volume management. The present study reveals further profiles and underlines the need for addressing TMCI in ABLS®; ATLS® and PHTLS® programs.

Incidence of combined burns and major trauma in England and Wales

Introduction

Within the United Kingdom’s major trauma networks, limited consideration is given to the management of concomitant burns and trauma injuries, prominently highlighted in the arrangement of specialist services for major trauma and burns care. The majority of the literature regarding this topic, based almost exclusively on North American studies, predicts between 5 and 7% of all patients admitted to burns centres will suffer from concomitant (non-thermal) trauma injuries, in addition to their burn injuries. The aim of this study is to understand the epidemiology and outcomes for patients sustaining burns and trauma injuries in England and Wales.

Methods

A retrospective review of patients sustaining concomitant burns and trauma injuries was made over a 71-month period from January 2010 to November 2016, using the national trauma registry for England and Wales, the Trauma Audit and Research Network database, identifying all patients with injury codes for burns and trauma (AIS >3). Data collected comprised patient demographic information, burn injury percentages, details of trauma injuries, details of hospital stay, and patient outcome. Comparison of information was made against the total burns and total trauma cohort to form a base standard for burns and trauma injuries, respectively.

Results

Over the period analysed, 188 patients were found to have concomitant burns and trauma injuries. The patients were stratified according to age and the percentage of total body surface area burned. Hospital length of stay for concomitant burns and trauma patients was found to be higher than that of patients with isolated burns injuries. Mortality rates, although low overall, were found to be relatively higher for patients with concomitant burns and trauma injuries.

Conclusions

This study demonstrated the rarity of this combination of injury pattern, in particular the occurrence of severe burns in the presence of major trauma, in UK. Improvements in burns care and trauma care hopefully contributes to the higher level of survival in concomitantly injured patients against data from previous literature. However, the synergistic effect of burns and trauma injuries appears to impact on the course of such patients, although larger scale analysis is required to determine the true prognostic factors.

Incidence of ventilator associated pneumonia in burn patients with inhalation injury treated with high frequency percussive ventilation versus volume control ventilation: A systematic review

BACKGROUND

Pneumonia increases mortality in burn patients with inhalation injuries. We evaluated whether the use of High Frequency Percussive Ventilation (HFPV) in burn patients with inhalation injuries can decrease rates of Ventilator Associated Pneumonia (VAP) compared to Volume Control Ventilation (VCV).

METHODS

Data were gathered from PubMed, EMBASE, Web of Science, reference lists, and hand search. For unpublished data we searched ClinicalTrials.gov and RePORTER. We included observational and Randomized Controlled Trials (RCTs) that compared rates of VAP with the use of HFPV and VCV in adult burn patients with inhalation injury. Two reviewers independently extracted data from the retrieved studies and assessed them for eligibility, methodology, and quality.

RESULTS

281 abstracts were reviewed, of which 4 studies (540 patients) were included. Two were observational and two were RCTs. All studies had moderate risk of bias. One study had low external validity while others had moderate external validity. The two observational studies found non-concordant results. One study found a 24% statistically significant reduction in the rates of VAP while the other found no difference. The two RCTs had small sample sizes. There was no significant difference in VAP rates between HFPV and VCV. The VCV arms of the four studies were heterogeneous. Only one study used low tidal volumes, whereas the rest used high tidal volumes in the VCV arm.

CONCLUSION

Evidence about decreased incidence of VAP in burn patients with inhalation injuries who are on HFPV compared to those on VCV is inconclusive. Although enhanced airway clearance by HFPV was thought to play a role in decreasing VAP in this population, high tidal volume in the VCV arms could be a confounding factor that should be eliminated in future studies before a firm conclusion can be reached. More RCTs comparing HFPV to low tidal volume VCV are needed.

Improving the ability to predict mortality among burn patients

BACKGROUND

Early efforts to predict death following severe burns focused on age and burn size; more recent work incorporated inhalation injury and pneumonia. Gender, co-morbid illness, and co-existent trauma have been implicated in burn mortality but have rarely been incorporated into predictive models.

METHODS

The National Burn Repository (NBR) and the National Trauma Data Bank (NTDB) provided data on 68,661 (54,219 and 14,442, respectively) burn patients that was used to develop and validate, respectively, a predictive model of burn mortality. Logistic regression was used to model the odds of mortality with respect to age, gender, % body surface area burned (BSAB), co-existent trauma, inhalation injury, pneumonia, and co-morbid illness. Performance of the predictive model was assessed using a deviance statistic, receiver operating characteristic (ROC) curves, and the Hosmer-Lemeshow (HL) statistic.

RESULTS

The predictive model that demonstrated optimal performance included the variables age, percent total BSAB, inhalation injury, co-existent trauma, and pneumonia. The area under the ROC curve for this model was 0.94 and the HL statistic was 16.0. The inclusion of additional variables, i.e., gender, co-morbid illness, did not improve the performance of the model despite reduction in the model deviance. When the predictive model was applied to the validation data source, the area under the ROC curve was 0.87 and the HL statistic was 10.0, indicating good discrimination and calibration.

CONCLUSION

The results of this study suggest that a comprehensive predictive model of burn mortality incorporating certain variables not previously considered in other models provides superior predictive ability.

The Impact of Combined Trauma and Burns on Patient Mortality

BACKGROUND

Combined trauma and burn injuries are uncommon and seldom studied. There is a presumption that these patients fare worse than their trauma- and burn-only counterparts, but the mortality risk has not been quantified.

METHODS

This was a retrospective cohort study using the 1994 to 2002 National Trauma Data Bank. Trauma- and burn-only patients were categorized according to Injury Severity Score (ISS) and burn severity (percentage body surface area burned [BSAB]), respectively, and combined trauma-burn patients were similarly categorized. Risk ratios (RRs) and 95% confidence intervals (CIs) were calculated comparing combined trauma-burn mortality to trauma-only and burn-only patients by corresponding trauma or burn severity. RRs were adjusted for age, gender, and ISS or burn severity.

RESULTS

Compared with minor trauma-only patients (ISS of 1-15), patients with minor trauma, when combined with burn injury, had significantly increased mortality (RR, 4.04; 95% CI, 3.51-4.66). Similarly, relative to minor burn-only patients (BSAB of 1-25%), combined trauma-burn patients with minor burns (RR, 5.00; 95% CI, 3.54-7.06) had significantly increased mortality. For combined trauma-burn patients with more severe burns or trauma, small but significant increased mortality risks were seen relative to major trauma-only patients (ISS of 26+; RR, 1.26; 95% CI, 1.05-1.51) and major burn-only patients (BSAB of 76+; RR, 1.45; 95% CI, 1.15-1.82).

CONCLUSION

The large increased risk of death for those with combined minor injuries is of clinical interest because the majority of combined patients fall into this category. Future research should characterize specific causes and types of injury of increased mortality in the patient with combined injuries.

[Primary treatment of burn patients]

Burn injuries can be caused by thermal, electrical, chemical, or mechanical trauma or radiation and are relatively rare, as they represent only about 1% of all emergencies. They are caused by accidents at home, during recreational activities, or in the occupational environment. Minor burn traumas are much more common than severe burn injuries with their systemic and potentially life-threatening effects. Altogether, these circumstances may result in a lack of routine for treating such injuries properly by physicians and their colleagues in the emergency room or intensive care unit. A clearly outlined concept for preclinical and clinical treatment can be the keystone of successful further clinical progress. The following article summarizes the current guidelines for first medical aid at the injury scene, burn stabilization and assessment in the emergency room, and the interdisciplinary approach for further clinical care. The treatment of dermatologic emergencies (acute epidermolytic syndromes) or caustic injuries by chemical agents is similar to the treatment of burn victims in many aspects but must be adapted in selected cases.

Ten Year Experience of Burn, Trauma, and Combined Burn/Trauma Injuries Comparing Outcomes

BACKGROUND

Percent total body surface area (TBSA) burn, inhalation injury (INH), and age all have been shown to be independent predictors of mortality in burn victims. Little is known regarding patients sustaining combined thermal and mechanical injuries in relation to either injury sustained in isolation or with regard to these variables. This descriptive study profiles the 10-year experience of a single American Burn Association/American College of Surgeons verified Level I trauma and burn center and the treatment of this patient population.

METHODS

A retrospective review of all burn and trauma patients admitted between 1990 and 2000. Patients were divided into three groups; Burn only (B), Trauma only (T), and combined Burn/Trauma (B/T). Groups were compared with respect to age, TBSA burn, length of stay (LOS), Injury Severity Score (ISS), INH and mortality. These groups were then compared with B, T and B/T patients from the National Burn Repository (NBR) and National Trauma Data Bank (NTDB). Student's t test and chi tests were performed, as well as multiple logistic regression to identify independent predictors of mortality. p <0.05 was considered significant.

RESULTS

Through our trauma registry, 24,093 patients were identified (T=22,284, B=1717 and B/T=92). When comparing B and T, there was no difference in age, LOS, ISS, or mortality to those patients in the NBR or NTDB. B/T patients showed significantly increased percentage with INH (B/T=44.5% versus 11%), increased LOS (B/T=18 days versus 13.7 B and 5.3 T) and increased mortality (B/T=28.3% versus 9.8% B and 4.3% T). B/T were also significantly older (B/T=40.1 years versus 31.0 B and 35.1 T). When these variables are compared with the NBR and the NTDB benchmarks, mortality (28.3% versus 11.6% NBR and 7.0% NTDB) and ISS (23 versus 11.7 NTDB) were significantly higher with no difference in age (40.1 versus 33.4 NTDB, 35.9 NBR), LOS (18 days versus 23.3 NBR) or TBSA (20.8% versus 19.5% NBR). Multiple logistic regression comparing TBSA, age, ISS and INH of survivors versus non-survivors identified only ISS as an independent predictor of mortality.

CONCLUSION

B combined with T presents a rare injury pattern that has a synergistic effect on mortality. Physicians and caregivers should be aware of a 2-3 fold increase in the incidence of INH in this population, and increased mortality despite similar TBSA burned when compared with patients with B as the sole mechanism; ISS appears to be an independent predictor of mortality in this combined injury pattern.

Damage limitation in burn surgery

Burn injury differs from other types of trauma in the apparent lack of urgency for treatment. We argue that in order to limit physiological damage and the development of multi-organ failure, management of the burn wound must be immediate and aggressive. Supportive fluid treatment should be judicious in order to prevent excessive oedema causing wound extension. Some potential strategies utilising oral fluid resuscitation are discussed, and potential pharmacological interventions. When associated with other trauma, major burn injury has a detrimental effect on morbidity and mortality, and surgical management of both aspects of a patient's injuries are altered.

Early tracheostomy does not improve outcome in burn patients

Early tracheostomy (ET) has been claimed to reduce ventilator support or intensive care unit or hospital length of stay in intensive care unit patients. This study was performed to assess the potential benefits of ET in burn patients. From October 1996 to July 2001, we evaluated all intubated and acutely burned adults using a formula to predict the probability of prolonged ventilator dependence. We randomized each patient with a probability of prolonged ventilator dependence more than 0.5 to ET, performed on the next operative day, or to conventional therapy (CON), which consisted of continued endotracheal intubation as needed, with tracheostomy (TRACH) performed on postburn day (PBD) 14 if necessary. During this period, 44 patients were randomized, 23 to CON and 21 to ET. Groups did not differ in age, total burn size, or inhalation injury, although ET patients had larger full-thickness burns. ET patients underwent TRACH at a mean of PBD 4 vs PBD 14.8 for CON patients (P <.01). ET patients had a significant improvement in PaO2 /FiO2 ratios within 24 hours following TRACH (139 +/- 15 vs 190 +/- 12; P <.01). There were no differences in ventilator support, length of stay, incidence of pneumonia, or survival. However, six CON patients (26%) were successfully extubated by PBD 14 compared with one ET patient (P <.01). Although tracheostomy offers some advantages in terms of patient comfort and security, routine performance of ET in burn patients does not improve outcomes, nor does it result in earlier extubation. This may be partly caused by the comfort and convenience of tracheostomy.

Management of the burned trauma patient: balancing conflicting priorities

PURPOSE

Approximately 5% of multiple trauma patients sustain concomitant burns. Complicated management issues arise in these patients as burn and trauma care often conflict. This study reviews 53 consecutive burned multiple trauma patients in order to examine common management conflicts and recommend appropriate compromises in caring for these difficult patients.

PROCEDURE

A retrospective review of 53 consecutive burn patients with coincident trauma admitted to The Massachusetts General Hospital (MGH) from 1993-2001 was performed.

FINDINGS

In the study period, 53 patients were admitted to the Massachusetts General Hospital with concomitant burns and trauma. Of this group, 42 (79%) were male. Average age was 31.5 +/- 15.0. Mechanisms included 11 motor vehicle collisions (MVC), 10 explosions, 10 electrocutions with subsequent falls, nine house fires, four motorcycle collisions (MCC), three pedestrian versus car accidents, two falls into fires, two plane crashes, and one each of a lawnmower accident and a patient drawn into a machine. Average burn size was 25.4% +/- 22.4. The most common traumatic injury was fracture (52). Management of fractures in burn patients and resuscitation in head injured burn patient represented the most common conflicts in patient care. There were five deaths (9.4%) in this series.

CONCLUSIONS

Burns are a rare but significant complication in the trauma patient. Outcomes are dependent on rapid trauma evaluation as well as effective resuscitation and wound management. Given the complexities of their problems, these patients necessitate a balanced multidisciplinary approach to maximize their potential for full recovery. Thoughtful compromise between trauma and burn priorities is frequently necessary.

A pilot study comparing percutaneous decompression with decompressive laparotomy for acute abdominal compartment syndrome in thermal injury

Abdominal Compartment Syndrome (ACS) has multiple causes, and decompressive laparotomy has been the most frequent modality to prevent worsening cardiovascular, respiratory, and renal function. This pilot study evaluated the utility of percutaneous drainage (PD) of peritoneal fluid compared with decompressive laparotomy in burn patients. A 26-month review was conducted. Nine of 13 (69%) study patients developed intra-abdominal hypertension (IAH) that progressed to abdominal compartment syndrome in 4 (31%). All were treated with PD using a diagnostic peritoneal lavage catheter. Peritoneal fluid analysis revealed a sterile plasma ultrafiltrate with electrolyte and other chemistries reflecting patient serum levels. Five patients underwent PD successfully, and their IAH did not progress to ACS. Four patients with greater than 80% TBSA and severe inhalation injury did not respond to PD and required decompressive laparotomy. There was no evidence of bowel edema, ischemia, or necrosis. All patients requiring decompressive laparotomies died either from sepsis or respiratory failure. Percutaneous decompression is a safe and effective method of decreasing IAH and preventing ACS in patients with less than 80% TBSA thermal injury.

Evolution of the Emergency Management of Severe Burns (EMSB) course in the UK

The principle of the 'golden hour' is now well established and forms the basis of a growing number of instructional courses teaching a systematic approach to the management of major trauma. In April 1997, the EMSB course, developed by the Australian and New Zealand Burn Association, was adopted by the British Burn Association to meet the needs of health professionals dealing with major burn injuries in this country. The experience of the first 13 courses following the introduction of EMSB is discussed and the course is recommended as a requirement for the training of UK plastic surgeons and plastic surgery nurses.

Burns during pregnancy: a gloomy outcome

The effect of burns on fetal and maternal survival is known to be detrimental. This prospective study describes the performance of pregnant burned patients who were managed and followed up for fetal and maternal outcomes at Ain Shams University's burn unit and Maternity Hospital during the period from October 1995 to September 1996. During the 12-month period, 27 pregnant burned patients were managed. Fetal and maternal mortality correlated with the total body surface area (TBSA) burned, the mortality rate being 63 per cent for both mothers and fetuses in the 25-50 per cent TBSA group. A fetal loss of 56 per cent with no maternal loss were recorded in the 15-25 per cent TBSA group. Experience in dealing with pregnant burned patients proves that early surgical excision and skin grafting, with timely termination of pregnancy are the best lines of treatment. Prevention or minimizing the effects of the burns may be achieved by proper education and guidance of the pregnant woman.