Inhalation burn injury in children

An eighteen-year review of intensive care requirements for paediatric burns in a regional burns service

INTRODUCTION

Advances in burns management have reduced mortality. Consequently, efficient resource management plays an increasingly important role in improving paediatric burns care. This study aims to assess the support requirements and outcomes of paediatric burns patients admitted to a burns centre intensive care unit in comparison to established benchmarks in burns care.

METHOD

A retrospective review of burns patients under the age of 16 years old, admitted to a regional burns service intensive care unit between March 1998 and March 2016 was conducted.

RESULTS

Our analysis included 234 patients, with the percentage of TBSA affected by burn injury ranging from 1.5% to 95.0%. The median (IQR) %TBSA was 20.0% (11.0-30.0), and the observed mortality rate was 2.6% (6/234). The median (IQR) length of stay was 0.7 days/%TBSA burn (0.4-1.2), 17.9% (41/229) required circulatory support and 2.6% (6/234) required renal replacement. Mortality correlated with smoke inhalation injury (P < 0.001), %TBSA burn (P = 0.049) and complications (P = 0.004) including infections (P = 0.013).

CONCLUSIONS

Among children with burn injuries who require intensive care, the presence of inhalational injury and the diagnosis of infection are positively correlated with mortality. Understanding the requirements for organ support can facilitate a more effective allocation of resources within a burns service.

Pharmacologic Management of Pediatric Burns

Many pediatric patients with burn injuries may be initially treated in a hospital where pediatric specialized care, including resources and trained personnel may be limited. This includes resuscitation in adult emergency departments and inpatient care in mixed adult-pediatric burn units. The intent of this review is to provide a compilation of topics for the adult trained pharmacist or another healthcare practitioner on the management of pediatric patients with burn injuries. This article focuses on several key areas of pharmacologic burn management in the pediatric patient that may differ from the adult patient, including pain and sedation, fluid resuscitation, nutrition support, antimicrobial selection, anticoagulation, and inhalation injury. It is important that all clinicians have resources to help optimize the management of burn injuries in the pediatric population as, in addition to burn injury itself, pediatric patients have different pharmacokinetics and pharmacodynamics affecting which medications are used and how they are dosed. This article highlights several key differences between pediatric and adult patients, providing an additional resource to assist adult-trained pharmacists or other healthcare practitioners with making clinical decisions in the pediatric burn population.

Delayed Presentation of Thermal Epiglottitis in a Toddler: A Case Report

A minor insult to the pediatric airway can have a devastating result. Unfortunately, the signs and symptoms of obstruction might not be present immediately and take some time to develop. Therefore, physicians should have a higher index of suspicion for airway obstruction in children that present with a history of ingestion of scalding liquid. Signs and symptoms of infectious vs noninfectious epiglottis do overlap and the key to differentiate is by careful history and physical exam, especially in nonverbal children. A secondary bacterial infection might complicate thermal epiglottis and make the picture a bit confusing. Therefore, a coordinated approach through a multidisciplinary team is indicated from the start and these cases should be managed and referred to a higher center.

Pediatric tracheal trauma

Tracheal trauma is an uncommon but potentially serious cause of airway injury in children. Presentation may be acute in cases of blunt or penetrating trauma, or delayed in cases of chronic irritation or indwelling endotracheal tubes. Symptoms include dyspnea, progressive respiratory distress, neck and chest swelling and ecchymosis, and dysphonia. Workup is pursued as allowed by the patient's clinical status and may include plain radiography, computed tomography, and endoscopy. Accuracy and efficiency of diagnosis is paramount for those at risk of rapid decompensation. Treatment may include observation, elective and strategic intubation, or primary surgical repair.

Esophageal Stricture as a Complication After Scald Injury in Children

Burn injuries are distressful and shocking events, which can lead to noteworthy sequelae on metabolic markers and organs. Such traumatic accidents do occur every so often in both adult and pediatric populations, requiring prompt and adequate treatments. Notably, scald injuries occur due to direct contact with hot liquids and these are the most common cause of burns in early childhood. Herein, we report on an 18-month-old boy admitted to our pediatric surgery unit for an extensive scald injury, who has experienced an unusual esophageal stricture following the traumatic event.

Early resuscitation and management of severe pediatric burns

Pediatric burns are a leading cause of injury and mortality in children in the United States. Prompt resuscitation and management is vital to survival in severe pediatric burns. Although management principles are similar to their adult counterparts, children have unique pathophysiologic responses to burn injury thus an understanding of the differences in fluid resuscitation requirements, airway management, burn and wound care is essential to optimize their outcomes.

Infant burns: A single institution retrospective review

Thermal injuries amongst infants are common and a cause of significant mortality and morbidity in South Africa. This has been attributed to the lack of an enabling environment (poverty-related lack of safe living conditions) and the cognitive and physical developmental immaturity of infants, who depend on their surroundings and adults to keep them safe. This is a retrospective observational study of 548 infant admissions over 48 months. Infant was defined as children below 13 months of age. The 548 infants constituted 23% of all paediatric burn admissions of ages 0-12 years. Three hundred and fourteen were males (57%) and 234 (42.7%) females. The infants were divided in a pre-ambulatory group of 143 (26%) infants of 0-6 months and an ambulatory group of 7 months to 12 months consisting of 457 (83.3%). The total body surface area (TBSA) ranged from 2-65%. Seventy-six percent (417 infants) occurred in the home environment. Scalds accounted for 86% (471 infants) and 6% (33 infants) were as a result of flame burns. Non-accidental injuries accounted for 1.2%. The anatomical distributions varied between the pre-ambulatory and ambulatory groups. Conservative management was done in 397 (72.4%) and 101(18.4%) infants underwent surgery. Infection was suspected in 76 (13.5%) infants with positive blood cultures in 15(20%) of the 76. ICU care was received in 46 (8.3%) infants and 15 (32.6%) of these had inhalation injuries. Of the inhalation injuries 11(23.9%) infants underwent mechanical ventilation of an average of 4.4 days. Ventilator associated pneumonia was diagnosed in 8(17%) of the ventilated children. The mortality rate was 0.36%. The surgically treated patients acquired more complications than the conservatively treated group. Special treatment considerations should be considered in this paediatric sub-group.

Pediatric Burn Care: Unique Considerations in Management

Severe pediatric burns require a multidisciplinary team approach at a specialized pediatric burn center. Special attention must be paid to estimations of total body surface area, fluid resuscitation and metabolic demands, and adequate analgesia and sedation. Long-term effects involve scar management and psychosocial support to the child and their family. Compassionate comprehensive burn care is accomplished by a multidisciplinary team offering healing in the acute setting and preparing the child and family for long-term treatment and care.

Pediatric inhalation injury

Smoke inhalation injury can cause severe physiologic perturbations. In pediatric patients, these perturbations cause profound changes in cardiac and pulmonary physiology. In this review, we examine the pathology, early management options, ventilator strategy, and long-term outcomes in pediatric patients who have suffered a smoke inhalation injury.

Management and outcomes of children with severe burns in New South Wales: 1995-2013

BACKGROUND

As a result of improvements in injury prevention, severe burns appear increasingly uncommon in Australian children. Such injuries continue to have devastating impacts, with major consequences for the patient, their family, treating clinicians and the caring institution.

METHODS

A retrospective review was undertaken of Australian children who presented to our institution between 1995 and 2013 with burn injuries ≥30% total body surface area (TBSA).

RESULTS

Ninety children were identified. Their median age was 3.9 years and 57% (n = 52) were male. Most injuries occurred at home (n = 63) due to fires (n = 49). The majority received inadequate first aid (n = 56) and 40 became hypothermic during initial resuscitation. A total of 79% were transferred from other institutions. The median TBSA burnt was 40% and the majority of burns were full thickness (n = 51). All but nine were managed in the Paediatric Intensive Care Unit with a mean initial hospital admission of 43.5 days. Two thirds of children were intubated, over half of those prior to transfer, with 26 having an inhalational injury and 33 escharotomies. Compared with estimated fluid requirements, most children were over-resuscitated by a median of 26.9 mL/kg. There were seven mortalities. Wound infections were common (n = 65) and 36 suffered sepsis. The median number of dressing changes was 13 (range 0-100), operations were six and packed cells transfused was 95.7 mL/kg. Overall, 54 developed hypertrophic scarring and 45 scar contractures that have required subsequent reconstructive surgery.

CONCLUSION

Severe burn injuries in children have significant morbidity and mortality. They would appear expensive to manage and impact substantially on health care resources.

Airway compromise in children with anterior neck burns: Beware the scalded child

AIM

The aim of the study was to describe characteristics of children with anterior neck burns admitted to our Paediatric Intensive Care Unit (PICU) and to highlight potential airway complications associated with these injuries, especially in children with scalds.

METHODS

Retrospective review of children with anterior neck burns requiring admission to PICU January 2004-December 2013.

RESULTS

Fifty-two children with anterior neck burns were admitted; average age 6.6 years. Thirty sustained flame/explosion injuries; 22 scalds. Seventy-nine per cent were male. Mean total body surface area (TBSA) burn 21%. Forty-seven were intubated. Some primary reasons for intubation included unconsciousness, inhalational/ingestion/direct airway injury and large TBSA. Majority, however, required intubation for airway complications secondary to subcutaneous/soft tissue anterior neck oedema not associated with airway injury/ingestion/inhalational burns. The scalds subgroup mean age was 2.3 years. Eighty-two per cent were male. Mean TBSA 18%. There were no inhalational/ingestion/airway injuries. Nineteen children were intubated; average 9.3 h post-injury. Majority (63%) were intubated post-arrival in the Burn Unit, compared with flame/explosion group (32%). Primary reasons for intubation included large burns, although majority (74%) required intubation for airway complications secondary to subcutaneous and soft tissue anterior neck oedema. For the flame/explosion group this was the case in only 46%, with other primary reasons such as unconsciousness or inhalational injury being the immediate precedent.

CONCLUSION

These results demonstrate that subcutaneous and soft tissue oedema secondary to anterior neck burns may contribute to airway narrowing and compromise requiring intubation. When assessing children's airways, evolving oedema should be recognised and higher observation or early intubation considered regardless of the mechanism of injury.

[Burns and scalds in children]

BACKGROUND

Since pediatric emergencies and burn injuries are rare in prehospital emergency medicine, emergency teams can hardly develop routine in emergency care.

OBJECTIVES

How to effectively treat burn injuries and avoid common errors?

MATERIALS AND METHODS

A simple and severity-based therapy concept based on the current literature using the example of a case report is presented.

RESULTS

About 80% of burns and scalds in children are not severe cases-in these patients an effective analgesia by intranasal administration is important and further invasive treatments are generally not necessary. The emergency care of children with severe burn injuries should start with intranasally administered analgesia and/or sedation. After an intravenous or intraosseous access is gained, moderate fluid therapy is started, which should be complemented by a fluid bolus only if signs of a shock are present. Additional administration of analgesia and/or sedation may be necessary. Estimation of the burned body surface area is best determined with the palm rule; the severity of the burn appears after a latency period. Induction of anesthesia and intubation are not required in the majority of cases.

CONCLUSIONS

By applying a modified ABCDE scheme, all emergency teams can provide effective emergency care in children with burn injuries.

Perioperative anesthesia management of the burn patient

Burn patients provide numerous challenges to the anesthesiologist. It is important to understand the multiple physiologic disruptions that follow a burn injury as well as the alterations in pharmacokinetics and pharmacodynamics of commonly used anesthetics. Thought must be given to surgery during initial fluid resuscitation and the airway challenges many of these patients present. Finally, the central role of pain management through all phases of care is a constant concern.

Severe burn injury, burn shock, and smoke inhalation injury in small animals. Part 1: burn classification and pathophysiology

OBJECTIVE

To review the literature related to severe burn injury (SBI), burn shock, and smoke inhalation injury in domestic animals. Current animal- and human-based research and literature were evaluated to provide an overview of thermal burn classification and the pathophysiology of burn shock and smoke inhalation injury.

ETIOLOGY

Severe burn injury, burn shock, and smoke inhalation injury may be encountered as a result of thermal injury, radiation injury, chemical injury, or electrical injury.

DIAGNOSIS

Burns can be subdivided based on the amount of total body surface area (TBSA) involved and the depth of the burn. Local burn injuries involve <20% of the TBSA whereas SBI involves >20-30% of the TBSA. The modern burn classification system classifies burns by increasing depth: superficial, superficial partial-thickness, deep partial-thickness, and full-thickness.

SUMMARY

Local burn injury rarely leads to systemic illness whereas SBI leads to significant metabolic derangements that require immediate and intensive management. SBI results in a unique derangement of cardiovascular dysfunction known as "burn shock." The physiologic changes that occur with SBI can be divided into 2 distinct phases; the resuscitation phase and the hyperdynamic hypermetabolic phase. The resuscitation phase occurs immediately following SBI and lasts for approximately 24-72 hours. This period of hemodynamic instability is characterized by the release of inflammatory mediators, increased vascular permeability, reduced cardiac output, and edema formation. The hyperdynamic hypermetabolic phase begins approximately 3-5 days after injury. This phase is characterized by hyperdynamic circulation and an increased metabolic rate that can persist up to 24 months post burn injury in people.

Severe burn injury, burn shock, and smoke inhalation injury in small animals. Part 2: diagnosis, therapy, complications, and prognosis

OBJECTIVE

To review the evaluation and treatment of patients suffering from severe burn injury (SBI), burn shock, and smoke inhalation injury. Potential complications and prognosis associated with SBI are also discussed.

DIAGNOSIS

Diagnosis of burn injury and burn shock is based on patient history and clinical presentation. Superficial burn wounds may not be readily apparent for the first 48 h whereas more severe wounds will be evident at presentation. Patients are diagnosed with local or SBI by estimating total body surface area involved using the 'Rule of Nines' or the Lund-Browder chart adapted from the human literature.

THERAPY

Patients suffering from SBI require immediate and aggressive fluid therapy. Burn wounds require prompt cooling to prevent progressive tissue damage. Due to significant pain associated with burn wounds and therapeutic procedures, multimodal analgesia is recommended. Daily wound management including hydrotherapy, topical medications, and early wound excision and grafting is necessary with SBI.

COMPLICATIONS

There are numerous complications associated with SBI. The most common complications include infections, hypothermia, intra-abdominal hypertension, and abdominal compartment syndrome.

PROGNOSIS

The prognosis of SBI in domestic animals is unknown. Based on information derived from human literature, patients with SBI and concomitant smoke inhalation likely have a worse prognosis than those with SBI or smoke inhalation alone.

Pediatric burn injuries

Pediatric burns comprise a major mechanism of injury, affecting millions of children worldwide, with causes including scald injury, fire injury, and child abuse. Burn injuries tend to be classified based on the total body surface area involved and the depth of injury. Large burn injuries have multisystemic manifestations, including injuries to all major organ systems, requiring close supportive and therapeutic measures. Management of burn injuries requires intensive medical therapy for multi-organ dysfunction/failure, and aggressive surgical therapy to prevent sepsis and secondary complications. In addition, pain management throughout this period is vital. Specialized burn centers, which care for these patients with multidisciplinary teams, may be the best places to treat children with major thermal injuries. This review highlights the major components of burn care, stressing the pathophysiologic consequences of burn injury, circulatory and respiratory care, surgical management, and pain management of these often critically ill patients.

Airway obstruction due to bronchial vascular injury after sulfur mustard analog inhalation

RATIONALE

Sulfur mustard (SM) is a frequently used chemical warfare agent, even in modern history. SM inhalation causes significant respiratory tract injury, with early complications due to airway obstructive bronchial casts, akin to those seen after smoke inhalation and in single-ventricle physiology. This process with SM is poorly understood because animal models are unavailable.

OBJECTIVES

To develop a rat inhalation model for airway obstruction with the SM analog 2-chloroethyl ethyl sulfide (CEES), and to investigate the pathogenesis of bronchial cast formation.

METHODS

Adult rats were exposed to 0, 5, or 7.5% CEES in ethanol via nose-only aerosol inhalation (15 min). Airway microdissection and confocal microscopy were used to assess cast formation (4 and 18 h after exposure). Bronchoalveolar lavage fluid (BALF) retrieval and intravascular dye injection were done to evaluate vascular permeability.

MEASUREMENTS AND MAIN RESULTS

Bronchial casts, composed of abundant fibrin and lacking mucus, occluded dependent lobar bronchi within 18 hours of CEES exposure. BALF contained elevated concentrations of IgM, protein, and fibrin. Accumulation of fibrin-rich fluid in peribronchovascular regions (4 h) preceded cast formation. Monastral blue dye leakage identified bronchial vessels as the site of leakage.

CONCLUSIONS

After CEES inhalation, increased permeability from damaged bronchial vessels underlying damaged airway epithelium leads to the appearance of plasma proteins in both peribronchovascular regions and BALF. The subsequent formation of fibrin-rich casts within the airways then leads to airways obstruction, causing significant morbidity and mortality acutely after exposure.

Extracorporeal membrane oxygenation as a lifesaving modality in the treatment of pediatric patients with burns and respiratory failure

PURPOSE

Several case series have described successful utilization of extracorporeal membrane oxygenation (ECMO) for the treatment of pediatric burn patients with respiratory failure. This study examines the Extracorporeal Life Support Organization registry experience in the treatment of these patients.

METHODS

The Extracorporeal Life Support Organization registry was queried from 1999 to 2008 for all patients not older than 18 years who suffered a burn-related injury.

RESULTS

Thirty-six patients met inclusion criteria. The mean age was 4.45 years, with an average weight of 20.9 kg. Survivors vs nonsurvivors had a shorter average time to ECMO (97 vs 126 hours, P = .890) and shorter average ECMO run times (193 vs 210 hours, P = .745). Seventeen patients underwent venovenous ECMO and 19 patients underwent venoarterial ECMO, with survival of 59% (n = 10) and 47% (n = 9), respectively (P = .493; odds ratio, 1.587; 95% confidence interval, 0.424-5.945). Overall survival was 53% (n = 19). Complications occurred in 28 patients (33 mechanical, 101 medical). The venoarterial group had 21 mechanical (n = 8) and 61 medical complications (n = 17), compared with the venovenous group with 12 mechanical (n = 8) and 40 medical complications (n = 11).

CONCLUSIONS

Extracorporeal membrane oxygenation can be a lifesaving modality for pediatric burn patients with respiratory failure. Survival is comparable to the reported survival of non-burn-related pulmonary failure pediatric patients requiring ECMO.