Field Improvised First Aid

Most first-aid training assumes you have a kit. A pair of gloves. A bandage. A tourniquet in the pouch on your belt. But emergencies do not always happen in environments where kits are accessible. A car accident on a remote road. A building collapse. A mass casualty event where supplies run out in the first minutes. A wilderness emergency three days from the nearest trailhead. In all of these scenarios, your ability to improvise using what is around you — clothing, sticks, water, belts, plastic bags — determines whether people survive until help arrives.

This guide covers the most important field improvisation techniques. None of them are perfect substitutes for proper equipment. All of them are better than doing nothing.

The Core Principle: STOP and THINK

Before acting in an improvised first-aid scenario, take 10–15 seconds to survey what you have available and what you actually need to do. Impulsive improvisation wastes resources. Brief assessment saves time overall.

Ask:

1. What are the life threats? (Airway, Breathing, Circulation)
2. What do I have available?
3. What is the simplest solution that addresses the most immediate threat?

Improvised Tourniquets

A commercial tourniquet is always preferable. If you do not have one, improvise — but understand the limitations:

What to Use

• Belts — loop twice around the limb; tighten with the buckle; thread a stick or pen through the looped material and windlass tight
• Ties or strips of fabric — minimum 5 cm wide; narrower materials (cord, rope, wire, zip ties) cause severe nerve and vessel damage without effective occlusion of deep vessels
• Clothing — tear a long strip from a t-shirt; fold lengthwise to achieve adequate width

What Not to Use

• Rope, cord, or wire — too narrow; cuts through tissue before occluding deep vessels
• Single thin fabric loops — insufficient width

Application

1. Position 5–7 cm above the wound toward the torso
2. Loop twice and tie a half-knot
3. Place a rod (stick, pen, fork, anything rigid) on the half-knot and tie another half-knot over it
4. Twist the rod to tighten until bleeding stops
5. Secure the rod with additional knots, adhesive tape, or by tucking it under the loop
6. Note the time on the person's skin with pen, blood, or mud

Limitation Note

Improvised tourniquets are significantly less reliable, less controllable, and more damaging than commercial ones. Use them when life is at immediate risk and nothing better is available. One CAT tourniquet costs approximately $30 — carry one.

Improvised Wound Dressings and Pressure

For bleeding control when no dressings are available:

• Clean clothing — the cleanest fabric available (inner layers of shirts, unused socks); fold into a pad and press firmly
• Plastic bags — for occlusive dressings on chest wounds (see below)
• Duct tape — to hold improvised dressings in place; can be used to create an improvised pressure dressing by layering fabric and taping firmly over a limb wound

Sucking Chest Wounds

If air is entering the chest through a wound with each breath (you can hear it), this needs to be sealed to prevent tension pneumothorax. An improvised chest seal:

1. Use a plastic bag, plastic packaging, or the wrapper from a medical product
2. Tape three sides of the plastic over the wound — leave one side unsealed to create a one-way valve (air escapes on exhale but cannot be sucked in on inhale)
3. If the casualty deteriorates despite this, remove the seal entirely to allow trapped air to escape

Wound Irrigation

Wound irrigation is the most effective method of reducing infection risk in field settings. The technique is more important than the fluid.

The Pressure Irrigation Technique

Simple rinsing is not enough. Effective wound irrigation requires pressure to physically dislodge bacteria and debris.

Improvised syringe:

• A plastic bag with a small hole poked in the corner
• A water bottle with a small hole in the cap
• A syringe from any first-aid kit
• Cup your hands and pour rapidly from height onto the wound

Aim for a steady, moderately pressured stream (not a trickle; not so strong it damages tissue further) directly into the wound. Irrigate for at least 2–5 minutes — longer for contaminated wounds.

What to Use for Irrigation

Available Fluid	Suitability
Clean drinking water	Good — effective and generally safe
Boiled water (cooled)	Preferred when time allows
Potable water tablets dissolved	Acceptable; slightly better than untreated
Saline (salt water — 9g salt per litre)	Equivalent to commercial saline
Slightly dirty water	Better than no irrigation for contaminated wounds
Urine (fresh, from healthy person)	Last resort — mostly sterile; inferior to water
Alcohol (spirits)	Antiseptic for skin; damaging to open wounds — do not irrigate with it

After irrigation, cover the wound with the cleanest available material and bandage in place.

Improvised Splints

The principle: immobilise the fracture by splinting the joint above and the joint below the break.

Rigid Components

• Straight branches or sticks (must be straight, strong, and padded)
• Trekking poles or ski poles
• Folded cardboard (stacked multiple layers)
• Tent poles
• Rolled magazines or newspapers (excellent for forearm/wrist)
• A straight piece of wood from packaging

Padding

• Clothing, socks, or anything soft between the rigid material and the skin
• Focus padding at bony prominences (ankle, wrist, knee)

Securing

• Strips of clothing tied at multiple points
• Belts
• Duct tape

Arm Sling Improvisation

• A shirt worn backwards with the arm inside the torso section provides a sling effect
• A triangular shape cut from any large fabric (jacket, sheet) creates a full sling
• Pin or tie the sling around the neck

Lower Limb Improvised Immobilisation

• Buddy taping: For ankle or foot injuries where no splint material is available, the injured leg can be loosely bandaged alongside the uninjured leg — the good leg serves as the splint. Pad between the limbs.

Improvised Stretchers

Moving an injured person on an improvised stretcher reduces further injury and allows safe transport over terrain.

Jacket Stretcher (Two Poles or Branches)

1. Zip or button two jackets facing each other
2. Thread two sturdy poles through both jackets — one through each sleeve pair
3. Leave enough pole extending beyond both ends for carries to grip
4. Test the stretcher with a team member before loading a patient

Blanket Roll Stretcher (No Poles)

1. Fold one-third of a blanket lengthwise
2. Lay the casualty on the blanket
3. Roll the remaining third up tightly against their body on each side
4. Carries grip the tightly rolled sides — the rolled edges create handles

Load distribution: At minimum, four people carrying a stretcher (one at each corner) reduces fatigue and provides more stable movement. Six is ideal on rough terrain.

Spinal injury: Do not improvise stretcher movement for suspected spinal injury unless the situation is life-threatening. Log roll technique (multiple people, one maintaining head alignment) is required.

Triage — Prioritising Multiple Casualties

If you have multiple injured people and limited resources, triage determines who receives care first:

Simple Triage (START Method)

1. Immediate (Red): Life-threatening injuries that are treatable now — severe bleeding, compromised airway, unconscious but breathing
2. Delayed (Yellow): Serious but stable — fractures, moderate bleeding controlled, conscious
3. Minor (Green): Walking wounded — minor injuries; can wait or self-treat
4. Expectant (Black): Injuries so severe that survival is unlikely even with full medical care, or already dead

Focus your limited resources on Red (Immediate) casualties first. Do not spend all your resources on one person when multiple others could be saved.

Reassess Frequently

Triage categories can change. A Yellow can become a Red if they deteriorate. Reassess every few minutes.

Signalling for Help

When you need rescue in a remote location:

Method	Technique
Mirror or reflective surface	Reflect sunlight toward aircraft or distant observers; a systematic flash pattern covers 360 degrees
Signal fire	Three fires in a triangle is an internationally recognised distress signal; use green vegetation on hot fire for smoke
Ground-to-air signals	Large letters in a clearing: "X" = need medical assistance; "V" = need help; "N" = no; "Y" = yes
Whistle	Three blasts, pause, three blasts — international distress signal
Mobile phone	Even with no service, most phones can call emergency services; place in aeroplane mode to conserve battery and check periodically

Quick Reference

Need	Improvise With
Tourniquet	Belt or 5 cm+ fabric strip + rod (windlass)
Wound dressing	Cleanest available cloth; tape in place
Chest wound seal	Plastic bag, 3 sides taped
Wound irrigation	Clean water under pressure — squeeze bottle or bag
Rigid splint	Branches, trekking poles, cardboard, magazines
Arm sling	Reversed shirt; fabric triangle
Stretcher	Two poles through buttoned jackets; rolled blanket
Triage	START — Red/Yellow/Green/Black
Distress signal	3 whistle blasts; 3 fires; reflective mirror; X on ground

This guide provides improvised first-aid techniques for situations where proper equipment is unavailable. Commercial first-aid equipment is always preferable. Improvised techniques carry higher risk of complication. All improvised interventions should be replaced with proper care as soon as medical resources become available.