👤 By the CinnaEMS Content Team🕐 Updated 2026-09-24🏷️ Clinical Judgment🔖 Free to read, print, and share
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Use this quick-reference guide to recognise, treat and hand over Shock Categories on the NREMT and on the call. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
📌 Cool Skin
Flat necks → hypovolemic
Distended necks → obstructive or cardiogenic
📌 Warm Skin
Flushed, often febrile → distributive
📌 Then
Treat the mechanism where you can reach it
Target perfusion, not a number
📚 Shock Categories — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what changes the plan, and what to hand over.
Every shock is inadequate perfusion, but the four categories fail in different places and the prehospital response differs. Skin and neck veins together sort them faster than any single sign.
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Key points
Understand these first
Hypovolemic — the tank is empty: cool, clamped, flat neck veins.
Distributive — the tank has widened: warm, flushed, often febrile.
Cardiogenic — the pump has failed: cool, often with crackles.
Obstructive — something blocks flow: distended necks, a mechanical sign.
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Nursing priorities
What to do, in order
Sort with skin plus neck veins before reaching for a cause.
In uncontrolled bleeding, target perfusion rather than a normal pressure.
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Red flags — report now
Escalate immediately
Distended necks with hypotension
Warm, flushed skin with fever and hypotension
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Patient teaching
What patients must know
Cool and clamped is the default; warm shock is the one that surprises people.
❓ Shock Categories: NREMT FAQs
What are the priority actions for Shock Categories in the field?
Sort with skin plus neck veins before reaching for a cause. In uncontrolled bleeding, target perfusion rather than a normal pressure.
What findings in Shock Categories change your plan or your transport decision?
Distended necks with hypotension. Warm, flushed skin with fever and hypotension.
What do I need to know about Shock Categories for the NREMT?
Hypovolemic — the tank is empty: cool, clamped, flat neck veins. Distributive — the tank has widened: warm, flushed, often febrile. Cardiogenic — the pump has failed: cool, often with crackles. Obstructive — something blocks flow: distended necks, a mechanical sign.
What should the crew communicate or document for Shock Categories?
Cool and clamped is the default; warm shock is the one that surprises people.
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Quick Tip
Hypovolemic — the tank is empty: cool, clamped, flat neck veins.