Revision sheet: Emergency First Aid for Critical Conditions

Emergency First Aid and Life-Threatening Conditions - Revision Sheet

1. 📌 Essentials

• Life-threatening bleeding often presents as spurting blood, indicating arterial injury.
• Apply direct pressure immediately; use a tourniquet only if pressure fails- Call emergency services (9-1-1) before starting treatment.
• Secondary assessment (SAM): Signs & Symptoms, Allergies, Medications.
• Cool burns with cold water remove dry agents carefully.
• Head/spinal injuries may show visible trauma, loss of sensation, confusion, or pain.
• Fractures, sprains, dislocations require immobilization; avoid unnecessary movement.
• Nosebleeds: pinch nostrils, sit forward, do not tilt head back.
• Heat stroke: core temperature >104°F; life-threatening, requires rapid cooling.
• Hypothermia: core temperature <95°F; common outdoors, needs gentle rewarming.
• Poisoning signs include abnormal heart rate, vomiting, breathing difficulty.
• Lightning safety: wait 30 minutes after last strike before resuming outdoor activity.
• Heart attack: chest pain, radiating pain, pale skin, sweating.
• Diabetic emergency: confusion, weakness, rapid heartbeat.
• Seizures: loss of consciousness, convulsions.
• Stroke: facial droop, arm weakness, speech difficulty.
• Shock: rapid weak pulse, pale skin, thirst, irritability; caused by bleeding, allergies, dehydration.

2. 🧩 Key Structures & Components

• Arteries — carry oxygen-rich blood; spurting blood indicates arterial bleeding.
• Tourniquet — device to control severe limb bleeding when direct pressure fails.
• Burn Types — heat, chemical, radiation, electrical.
• Head/Spinal Injuries — may involve skull fractures, vertebral damage.
• Bones & Joints — include long bones, joints, dislocations, fractures.
• Nasal Blood Vessels — fragile, prone to bleeding.
• Thermoregulatory System — manages body temperature; affected in heat/cold illnesses.
• Poisoning Agents — chemicals, toxins, medications.
• Lightning Pathways — electrical discharge through the body.
• Cardiovascular System — heart, blood vessels; involved in heart attack, shock.
• Nervous System — brain, spinal cord; affected in head/spinal injuries, seizures, stroke.

3. 🔬 Functions, Mechanisms & Relationships

• Arterial bleeding causes spurting blood due to high pressure; immediate pressure or tourniquet needed.
• Secondary assessment (SAM) gathers critical info for tailored treatment.
• Burns damage skin and underlying tissues; cooling halts tissue damage.
• Head/spinal injuries disrupt neural pathways; immobilization prevents further injury.
• Fractures/dislocations destabilize skeletal structure; immobilization stabilizes.
• Nosebleeds result from fragile vessels; sitting forward prevents swallowing blood.
• Heat stroke impairs thermoregulation; rapid cooling restores temperature.
• Hypothermia slows metabolic processes; rewarming restores function.
• Poisoning affects vital signs; removal of source and medical intervention are crucial.
• Lightning strikes cause electrical injury; shelter prevents further harm.
• Heart attack results from blocked coronary arteries; oxygen delivery is compromised.
• Diabetic emergencies stem from blood sugar imbalance; glucose or insulin needed.
• Seizures involve abnormal electrical activity; protect from injury.
• Stroke results from ischemia or hemorrhage; prompt treatment minimizes damage.
• Shock reduces tissue perfusion; treatment involves stopping bleeding, rewarming, and elevating legs.

4. 📊 Comparative Table

Item	Key Features	Notes / Differences
Arterial Bleeding	Spurting, bright red blood; rapid blood loss	Requires immediate action; tourniquet if needed
Venous Bleeding	Steady, dark red blood; slower flow	Controlled with direct pressure
Burn Types	Heat, chemical, radiation, electrical	Different mechanisms; cooling effective
Head Injury Signs	Visible trauma, confusion, loss of sensation/movement	Immediate immobilization necessary
Fracture vs. Dislocation	Fracture: broken bone; Dislocation: joint out of place	Both require immobilization
Heat Stroke vs. Exhaustion	Stroke: temp >104°F; Exhaustion: dehydration, fatigue	Heat stroke is life-threatening
Hypothermia vs. Frostbite	Hypothermia: whole body temp drops; Frostbite: localized skin freezing	Both caused by cold exposure

5. 🗂️ Hierarchical Diagram

Emergency Response
 ├─ Primary Assessment
 │    ├─ Airway
 │    ├─ Breathing
 │    ├─ Circulation
 │    └─ Disability (AVPU)
 └─ Secondary Assessment (SAM)
      ├─ Signs & Symptoms
      ├─ Allergies
      └─ Medications

6. ⚠️ High-Yield Pitfalls & Confusions

• Confusing arterial (spurting) vs. venous (steady) bleeding.
• Using a tourniquet for minor bleeding — avoid.
• Tilted head back in nosebleeds — incorrect; sit forward.
• Assuming all burns are thermal — chemical, electrical, radiation also common.
• Overlooking signs of head/spinal injury; do not move victim unnecessarily.
• Misinterpreting symptoms: confusion in stroke vs. diabetic emergency.
• Applying cold water to chemical burns — check specific agent protocols.
• Ignoring signs of hypothermia outdoors; rewarming must be gentle.
• Delaying lightning safety; wait 30 minutes after last strike.

7. ✅ Final Exam Checklist

• Recognize arterial vs. venous bleeding.
• Apply direct pressure immediately; use tourniquet only if necessary.
• Call emergency services before starting treatment.
• Use SAM for secondary assessment.
• Cool burns with cold water; remove dry agents carefully.
• Identify signs of head/spinal injury; immobilize if suspected.
• Immobilize fractures, dislocations; avoid movement.
• Pinch nostrils, sit forward for nosebleeds.
• Recognize heat stroke: temp >104°F; cool rapidly.
• Identify hypothermia: temp <95°F; rewarm gently.
• Detect poisoning signs: abnormal HR, vomiting, breathing issues.
• Wait 30 minutes after lightning strike before resuming outdoor activity.
• Identify signs of heart attack: chest pain, radiating pain, pale skin, sweating.
• Recognize diabetic emergency: confusion, weakness, rapid heartbeat.
• Detect seizure: loss of consciousness, convulsions.
• Spot stroke: facial droop, arm weakness, speech difficulty.
• Treat shock: control bleeding, elevate legs, keep warm, monitor vital signs.

End of Revision Sheet