Trauma Basics: First Aid and Hemorrhage Control Guide

Accidents do not wait for a hospital. A road accident victim, a child who cut an artery on glass, or a bleeding extraction patient all need help within minutes, long before an ambulance arrives. Basic trauma first aid is simple actions that keep a person alive until help arrives.

The most important skill is controlling bleeding. A person can bleed to death from a major artery in minutes, while help takes much longer. Direct pressure, applied at once without peeking, stops most bleeding — everything else builds around this.

Key Concepts

• Primary survey (ABCDE): Airway, Breathing, Circulation (bleeding), Disability (consciousness), Exposure (hidden injuries) — always in this order.
• Arterial bleeding: bright red blood spurting with the heartbeat; the most dangerous and fastest.
• Venous bleeding: dark red blood flowing steadily; serious but slower.
• Capillary bleeding: slow oozing from scrapes; usually stops on its own.
• Shock: the body failing from blood loss — pale, cold, sweaty skin, fast weak pulse, rapid breathing, confusion. About 20 percent blood loss brings early shock signs.
• Tourniquet: a tight band above a limb wound stopping all blood flow; used when direct pressure fails.

How It Works

Bleeding control follows an escalation ladder. Step one: press hard directly on the wound with a clean cloth and do not lift it to check — lifting breaks the forming clot. Step two: if blood soaks through, add more cloth on top; never remove the first layer. Step three: raise a limb wound above heart level while pressing. Step four: if severe limb bleeding continues, apply a tourniquet 5 to 7 cm above the wound (never over a joint), tighten until bleeding stops, note the time, and never loosen it — only medical staff do that. Keep the person lying down, warm and still, and call for help at once.

Never remove an object stuck in a wound (it may be plugging a torn vessel — pad around it), and never give food or water (surgery may be needed).

Worked Example

A 60 kg adult cuts his forearm badly. How much blood can he lose before shock begins?

1. Adult blood volume ≈ 70 mL per kg. 60 × 70 = 4200 mL, about 4.2 litres.
2. Early shock after roughly 20 percent loss: 0.20 × 4200 = 840 mL.
3. That is less than two blood-donation bags (about 450 mL each) — lost faster than most people expect.
4. The bystander presses a folded cloth hard on the wound, adds a second cloth when the first soaks, raises the arm, and calls emergency services. Bleeding slows within minutes as the clot forms.

So pressure must start in seconds, not after hunting for a first-aid kit.

Common Misconceptions

• "Tourniquets always cost the limb." A tourniquet under two hours rarely causes lasting harm, while uncontrolled bleeding kills in minutes. Fear must never delay it when pressure fails.
• "Pull the knife out so the wound can be cleaned." Never — it may be plugging a torn vessel. Surgeons remove it in the operating room.
• "Stopped bleeding means the danger is over." Internal bleeding can continue invisibly. Pale, cold, confused behaviour after injury still needs urgent hospital care.

Real-World Applications

• After extractions, firm gauze bitten down 30 to 45 minutes lets the socket clot form.
• Accident first responders control catastrophic bleeding before anything else, including before moving the patient.
• Workplaces with machinery keep tourniquets and pressure bandages for arterial industrial cuts.

Trauma first aid is simple: press hard, don't peek, add more cloth, raise the limb, tourniquet if pressure fails, get help fast. Started in the first minute, they separate a scary story from a tragedy.