Tutorial

First Aid

Essential medical knowledge for emergencies: life-saving skills everyone should have.

Tutorial·Difficulty: Beginner·10 chapters·Updated Apr 19, 2026

Chapters

About this tutorial

Essential medical knowledge for emergencies: life-saving skills everyone should have.

Why First Aid Matters

In emergencies, professional help may be minutes away, but seconds count. Knowing what to do can:

  • Save lives
  • Prevent injuries from worsening
  • Reduce recovery time
  • Provide comfort to victims
  • Keep you calm in crisis

Disclaimer: This guide is educational. Take a certified course for hands-on training. Always call emergency services for serious situations.

Contents

ChapterTopic
01-emergency-responseScene assessment, calling for help, triage
02-cpr-aedCardiac arrest, CPR, defibrillator use
03-bleeding-woundsControlling bleeding, wound care, tourniquets
04-chokingAirway obstruction in adults and children
05-shockRecognizing and treating shock
06-fractures-sprainsBone and joint injuries
07-burnsThermal, chemical, and electrical burns
08-medical-emergenciesHeart attack, stroke, seizures, diabetic emergencies
09-environmentalHeat, cold, drowning, bites, stings
10-first-aid-kitBuilding and maintaining supplies

The Universal Response

For any emergency, remember DR. ABC:

StepActionWhat to Do
DDangerIs the scene safe for you?
RResponseIs the person conscious?
AAirwayIs the airway clear?
BBreathingAre they breathing normally?
CCirculationIs there severe bleeding?

Quick Reference: Common Emergencies

Unconscious, Not Breathing

  1. Call 911 (or have someone call)
  2. Start CPR immediately
  3. Use AED if available
  4. Continue until help arrives

Severe Bleeding

  1. Apply direct pressure with cloth
  2. Maintain pressure, don't remove cloth
  3. If blood soaks through, add more cloth on top
  4. Use tourniquet only if pressure fails and bleeding is life-threatening
  5. Keep victim warm, call 911

Choking (Adult)

  1. Ask "Are you choking?"
  2. Give 5 back blows between shoulder blades
  3. Give 5 abdominal thrusts (Heimlich)
  4. Alternate until object expelled or person becomes unconscious
  5. If unconscious, begin CPR

Heart Attack Signs

  • Chest pain/pressure (may radiate to arm, jaw, back)
  • Shortness of breath
  • Cold sweat
  • Nausea
  • Lightheadedness

Action: Call 911, have person rest, give aspirin if not allergic

Stroke Signs (FAST)

  • Face drooping
  • Arm weakness
  • Speech difficulty
  • Time to call 911

Action: Call 911 immediately. Note time symptoms started.

The Chain of Survival

For cardiac arrest:

1. Early Recognition → 2. Early CPR → 3. Early Defibrillation → 4. Advanced Care

Each link matters. Bystander action before EMS arrival dramatically improves survival.

In most jurisdictions, Good Samaritan laws protect rescuers who:

  • Act in good faith
  • Provide care within their training
  • Don't accept compensation
  • Don't act with gross negligence

Key principle: Reasonable care, not perfect care, is the standard.

Always:

  • Get consent if person is conscious
  • Identify yourself and ask "May I help you?"
  • Implied consent exists for unconscious victims

First Aid Mindset

Stay Calm

  • Take a breath
  • Assess before acting
  • Your calm helps the victim

Do No Harm

  • Don't move unless necessary
  • Don't remove embedded objects
  • Don't give food/water to unconscious

Get Help

  • Call 911 for serious situations
  • Don't be a hero alone
  • Delegate tasks to bystanders

Document

  • Note time of incident
  • Note time of interventions
  • Note changes in condition
  • This helps medical professionals

Training Recommendations

Get certified:

  • American Red Cross first aid/CPR
  • American Heart Association BLS
  • Stop the Bleed course
  • Wilderness First Aid (if remote activities)

Refresh skills:

  • Certifications typically valid 2 years
  • Practice skills periodically
  • Review changes in guidelines
  • American Red Cross First Aid app (free)
  • American Heart Association resources
  • Stop the Bleed (stopthebleed.org)
  • Your local fire department (often offers free training)