What is Shock?

Shock is a life-threatening medical emergency where the body's circulatory system fails to deliver oxygen to vital organs. Rapid recognition and first aid treatment are critical for survival.

Short answer

Shock is a state of severe circulatory failure causing inadequate oxygen delivery to tissues. The three main types are hypovolemic (blood loss), cardiogenic (heart failure), and distributive (sepsis, allergic reaction).

Shock Progression and Treatment

1
Recognition
Pale skin, rapid pulse, weak breathing, confusion, cold limbs
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2
Immediate Action
Call emergency, lay person flat, elevate legs, keep warm
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3
Monitor
Watch pulse, breathing, skin color; speak reassuringly
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4
Prevent Fluid Loss
Treat bleeding, nothing by mouth; oxygen if available

Step-by-step worked examples

A person has lost 2 litres of blood in an accident. What type of shock?

Blood loss → volume drop → circulatory failure
Type: Hypovolemic shock (not enough circulating fluid)

A patient's heart stops pumping properly. Which shock type?

Heart failure → reduced cardiac output → no blood to organs
Type: Cardiogenic shock (pump failure)

Someone in shock is pale and confused. First aid steps?

1. Call emergency
2. Lay flat, raise legs (unless spinal injury)
3. Cover with blanket (warmth)
4. Stay calm, reassure, monitor breathing

Flashcards

Quick quiz

Q1.Shock is caused by:

Correct answer: B. Shock is specifically inadequate oxygen delivery due to circulation failure, not pain or emotions.

Q2.Hypovolemic shock is due to:

Correct answer: B. Hypovolemic shock results from decreased blood volume, typically from hemorrhage.

Q3.Why lay a shocked person flat with legs raised?

Correct answer: C. Elevating legs improves blood flow to the brain and heart, sustaining critical functions.

Q4.Which is NOT a sign of shock?

Correct answer: B. Shock causes pale, cold, clammy skin — warm flushed skin indicates something else, like fever or heat stroke.

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Common mistakes

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Shock is just emotional distress. — Correct: Medical shock is life-threatening circulatory failure with inadequate oxygen delivery.

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Raising the head helps a shocked person. — Correct: Raise the legs (unless spinal injury) to push blood toward the brain and heart.

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Remove blankets to cool a shocked person. — Correct: Keep them warm with blankets; heat loss worsens shock.

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Give fluids by mouth to someone in shock. — Correct: Nothing by mouth — risk of aspiration; IV fluids are for hospital only.

FAQ

What is shock and why is it dangerous?

Shock is circulatory failure preventing oxygen delivery to organs. Without fast treatment, it causes organ damage and death within minutes.

How do you recognize shock?

Pale cold clammy skin, rapid weak pulse, fast shallow breathing, confusion, weakness, nausea.

What are the three types of shock?

Hypovolemic (blood loss), cardiogenic (heart stops pumping), distributive (infection/allergy widens blood vessels).

What is the first aid for shock?

Call emergency, lay flat with legs raised (unless spinal injury suspected), keep warm, reassure, monitor breathing.