Burns are defined as injuries to the skin or other tissues (sometimes extending below the skin) caused by heat, chemicals, electricity, friction, or radiation. The severity and depth of tissue injury depend on temperature and duration of exposure. Burn shock is a life-threatening condition that occurs after a severe burn injury. It involves a significant loss of fluids and electrolytes, leading to decreased blood volume and potential organ failure. This guide provides clear, practical information for recognising burn shock and managing burn injuries effectively—especially in major burn cases involving extensive burn trauma.
Learn how to assess burn size, understand burn pathophysiology, and provide critical care response to burn injury, such as airway management, fluid resuscitation, and burn wound treatment. This knowledge is essential for any burn patient, carer, or first responder.
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Key Takeaways
- Burn shock is a life-threatening complication of severe burns, requiring immediate recognition and fluid resuscitation.
- Accurate assessment of burn size (TBSA) and burn depth is critical for determining the severity and treatment of burn injuries.
- Immediate burn care includes cooling with running water, protecting the burn wound, and calling emergency services for major burns.
- Children and elderly burn patients are at higher risk of burn shock, even with burns greater than 10% TBSA.
- Airway management is a priority for inhalation injuries and burns involving the face or neck.
- Fluid resuscitation in burn patients follows the Parkland Formula and is critical within the first 24 hours of a thermal injury.
- Specialist treatment, including burn surgery and wound management, is provided in designated burn units or burn centres.
- Electrical burns, chemical burns, and deep burns often require advanced care and long-term care management.
- Early burn wound excision, pain control, and infection prevention are key parts of burn treatment and recovery.
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What Are Burn Injuries? Understanding Their Pathophysiology
Burn or thermal injuries cause damage to the skin and underlying tissues. The pathophysiology of burn injuries involves complex responses, including massive fluid and protein loss, severe inflammatory reactions, and a risk of burn shock, often requiring prompt fluid resuscitation.
Major Pathophysiological Responses
Massive Fluid Loss:
Severe burn injuries rapidly increase vascular permeability, resulting in leakage of plasma (fluid/proteins/electrolytes) into the interstitial space and unburned tissue. This leads to pronounced edema (massive swelling) and hypovolemic shock, requiring aggressive fluid resuscitation, especially in major burns.Inflammatory Reactions:
Burns trigger a robust inflammatory response. This includes local and systemic activation of immune cells, release of cytokines (e.g., TNF-α, IL-6), and other mediators that drive vasodilation, increased vascular permeability, and tissue injury or necrosis. Severe burns can precipitate systemic inflammatory response syndrome (SIRS) and immune dysfunction.Burn Shock:
Burn shock is a combination of hypovolemic and distributive shock, resulting from fluid loss and widespread inflammation. It typically occurs after burns involving >20% total body surface area in adults (lower threshold in children/elderly). Fluid resuscitation is critical to restore and maintain organ perfusion (blood flow) and prevent organ failure.
Burns may be classified by type of burn and burn depth:
Type of Burn | Cause | Example Scenario |
Thermal burns | Flames, hot liquids, surfaces | Scald from boiling water |
Electrical burn | Electric current or lightning | Shock from faulty appliance |
Chemical burn | Acid, alkali or solvents | Industrial chemical splash |
Inhalation injuries | Smoke, steam, or toxic fumes | Breathing in smoke from house fire |
Burns are also classified by burn depth:
Burn Depth | Description | Example |
Superficial | Red, dry skin, no blisters | Sunburn |
Partial-thickness burn | Blisters, swelling, very painful | Scald injury |
Full-thickness burns | White or charred skin, little/no pain | Deep flame injury, electrical burn |
Recognising Severe Burn Injuries and Burn Shock
Burn shock usually develops in patients with severe burns, especially those with burns involving more than 15–20% of total body surface area (TBSA) in adults or more than 10% TBSA in children and the elderly. As mentioned above, it is a hypovolemic shock caused by plasma leakage into surrounding tissues.
Burn Injury in Children and the Elderly
Please remember: pediatric burn patients and older adult patients with burn injury are particularly vulnerable to burn shock, even with smaller burn areas. Children with burns greater than 10% TBSA need urgent transfer to a burn unit.
Initial Management of the Burn Patient
Burn First Aid Steps
Immediate, correct initial treatment of burn victims can limit complications:
Step | Action |
Stop the burning process | Remove from heat source; extinguish flames |
Cool the burn | Cool running water for 20 minutes (not ice!) |
Cover the burn | Use non-stick sterile dressing or clean cloth |
Keep the patient warm | Prevent hypothermia |
Seek medical help | Call 000 for large burns or signs of burn shock |
Burn Size Assessment and TBSA Burn Calculation
Accurate estimation of burn size is critical for burn resuscitation and referral decisions.
Rule of Nines – Adult TBSA Burn Estimation
Body Area | % TBSA |
Head and neck | 9% |
Each arm | 9% |
Each leg | 18% |
Front torso | 18% |
Back torso | 18% |
Perineum (genital to anul area) | 1% |
Fluid Resuscitation in Burn Management
Large thermal burns cause significant fluid loss. The American Burn Association recommends the Parkland Formula to calculate fluid needs:
4 mL x Body Weight (kg) x %TBSA Burn
Half given in first 8 hours; remainder over next 16 hours.
Australian Practice: Usage of Parkland/Modified Parkland Formula
In Australia, the Parkland Formula (or its slight variation, the “Modified Parkland Formula”) is also the principal method for estimating initial fluid resuscitation in major burns, with clinical guidelines commonly recommending:
3–4 mL/kg/%TBSA over the first 24 hours (most state guidelines—including Victoria, NSW, and Queensland—specify 3 mL/kg/%TBSA as standard, with 4 mL/kg/%TBSA reserved for inhalation, electrical injuries, or severe trauma).
Half of the volume in the first 8 hours post-injury, starting from the time of burn, and the remaining half over the next 16 hours.
Close monitoring is required to titrate fluids according to patient response (especially urine output), and the formula should be adjusted for pre-hospital fluids and clinical signs.
Clinical Goals and Specialist Care
Goals of fluid resuscitation: Prevent renal failure, support tissue perfusion, maintain circulation, and minimise burn shock risk.
Care setting: Major burns are ideally managed in specialist burn centres with access to burn surgery, intensive care, and experienced multidisciplinary teams.
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Key Elements of Fluid Resuscitation Practice
| Feature | Australia (Usual Practice) | US/ABA (Parkland Formula) |
|---|---|---|
| Formula | 3–4 mL/kg/%TBSA | 4 mL/kg/%TBSA |
| Fluid Type | Hartmann’s solution or Normal Saline | Lactated Ringer’s |
| Timing | ½ in first 8 hrs; ½ in next 16 hrs | Same |
| Additional Considerations | Adjust for inhalation/electrical burns | Same |
| Setting | Specialist burn centres | Burn centres |
| Monitoring | Urine output, vitals, perfusion goals | Same |
Airway Management and Inhalation Injuries
Inhalation injuries are common in burns involving confined spaces. When burn injuries affect the face or neck, airway management is a priority.
Airway Management May Include:
- Oxygen therapy
- Early intubation (to prevent swelling-induced obstruction)
- Nebulised bronchodilators
- Monitoring respiratory rate and oxygen saturation
Patients with facial burns, soot in the mouth or nose, or difficulty breathing should be sent to a burn unit immediately.
Burn Wound Management and Burn Surgery
Surgical Management of Burn Wounds
In deep burn cases, early burn wound excision and skin grafting reduce infection and improve outcomes. This is standard practice for patients with large burns or extensive burns.
Burns to functional areas like the face, hands, genitals, or joints often require surgical management at a specialised burn centre.
Care Management and Long-Term Support
The management of the burn patient doesn’t stop after wound healing. Ongoing care management may include:
Quick Quiz: Burn First Aid and Shock Response
Test your knowledge of burn management and emergency response
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References
- Australian & New Zealand Burn Association (ANZBA) – Burn Management Guidelines
- American Burn Association – Burn Shock Resuscitation Recommendations
- Queensland Health – Burns and Scalds Treatment Protocol
- International Society for Burn Injuries – Innovative Solutions in Burn Rehabilitation from Around the World
- Royal Children’s Hospital Melbourne: Nursing management of burn injuries
- Health Direct: Burns and Scalds
Frequently Asked Questions
What is burn shock?
Burn shock is a life-threatening condition that occurs after a severe burn injury. It involves a significant loss of fluids and electrolytes, leading to decreased blood volume and potential organ failure.
How can I recognise the signs of burn shock?
Signs of burn shock include rapid heart rate, low blood pressure, confusion, decreased urine output, and cool, clammy skin. Immediate medical attention is necessary if these symptoms are observed.
What initial steps should be taken to manage burn shock?
Initial management of burn shock includes calling emergency services, keeping the patient calm, elevating the legs if possible, and administering fluids if trained to do so. Avoid giving the patient anything to eat or drink.
How can burn complications be prevented?
Preventing burn complications involves prompt and appropriate first aid treatment of the burn, maintaining proper hydration, monitoring vital signs, and seeking medical evaluation for severe burns.
When should I seek medical help for a burn?
Seek medical help for burns that cover a large area, are deep, involve the face, hands, feet, or genitals, or show signs of infection such as increased redness, swelling, or discharge.
