In a wilderness situation, professional medical help is hours or days away. The decisions you make in the first few minutes after an injury are often the difference between a survivable accident and a fatality. The principles of wilderness first aid differ from urban first aid primarily in one respect: you must be prepared to manage a situation for extended time before evacuation is possible.
The ABCDE Assessment
Before treating any injury, assess the whole situation using the ABCDE framework. Airway — is the casualty's airway clear? Breathing — are they breathing adequately? Circulation — is there life-threatening bleeding? Disability — are they conscious and oriented? Exposure — have you identified all injuries? This systematic approach ensures you don't miss a life-threatening condition while treating a less critical wound.
In a wilderness context, environmental factors complicate assessment. Hypothermia masks pulse and consciousness signs. Altitude affects breathing rate. Dehydration affects blood pressure. Adjust your assessment accordingly, and always err on the side of caution — if you're not sure whether someone's breathing adequately, manage them as if they're not.
Bleeding Control
Life-threatening bleeding is the first priority. Direct pressure is the primary technique — apply firm, constant pressure to the wound with whatever material is available. In order of preference: sterile gauze, clean cloth, or even your bare hand. Maintain pressure for at least 10 minutes without peeking — premature removal disrupts clot formation. If bleeding soaks through, add more material on top rather than removing soaked layers.
For catastrophic bleeding that won't stop with direct pressure, consider a tourniquet. Place it 5-7cm above the wound (not on a joint), tighten until bleeding stops, note the time of application, and do not remove it. Modern tourniquet guidelines (modified elastic bandage, windlass, or commercial device) have evolved significantly from historical tourniquet use. A properly applied tourniquet on a limb rarely causes the tissue damage previously associated with tourniquet use.
Shock Management
Shock — inadequate blood perfusion to vital organs — accompanies severe injury. Signs include: rapid, weak pulse; cold, clammy skin; altered mental state; falling blood pressure; nausea; and pallor. Shock requires immediate treatment: control bleeding, lay the person flat, elevate the legs (unless there's a head/neck/spine injury or difficulty breathing), insulate from the ground, and keep them calm. Do not give oral fluids to an unconscious or potentially surgical patient.
Hypovolemic shock from blood loss is the most common shock type in trauma. The treatment is bleeding control plus the measures above. Cardiogenic shock (heart failure), anaphylactic shock (severe allergic reaction), and septic shock (infection) all present differently and require different treatments — but the initial response of keeping the patient flat, warm, and calm applies to all.
Wound Care
Once life threats are managed, address other wounds. The principles: clean the wound by removing visible debris, irrigate with clean water (ideally disinfected), apply antibiotic ointment if available, and dress with a sterile bandage. Leave puncture wounds open to drain — closing them traps bacteria inside. Close gaping wounds with butterfly closures or tape, but leave a drain point if infection seems likely.
The most important wound care decision in wilderness medicine is whether to evacuate. Deep wounds, wounds with persistent redness or swelling, animal bites, and wounds that aren't responding to initial treatment all require professional care. A wound that looks minor but develops expanding redness, increasing pain, red streaking, or fever within 24-48 hours needs evacuation.
Related Articles
- First Aid Severity Score — Assess injury urgency
- Trauma First Aid — Serious injury management
- Hypothermia & Cold Survival — Cold injury first aid