
09/11/2025
🚑 Volume Shock Made Simple
What is Shock = When the circulatory system has an inadequate perfusion pressure. In other words- there is not enough pressure to push oxygen into cells
What it’s NOT: Shock isn’t fainting at the sight of blood or from pain — that’s a nervous system response.
🛠️ Think of your circulatory system as:
�❤️ Pump = the heart�
🔧 Pipes = the blood vessels�
💧 Fluid = the blood
1️⃣ Normal System:�The pump pushes fluid through the pipes → steady pressure keeps oxygen flowing everywhere.
2️⃣ Fluid Loss (Volume Shock):�Bleeding, dehydration, vomiting, or diarrhoea = less fluid in the system → pressure drops.
3️⃣ Our bodies compensate for the loss of pressure by: Heart pumps faster → raise pressure and gets oxygen to the important organs ✔️ Breathing quickens → because the pump needs more oxygen to work harder�👉 Mental status stays normal… but only for so long.
4️⃣ Decompensation: We start to loose pressure to the brain - the core organs are more important! - This is when we will see that change in AVPU
⚡Shock is about circulation, pressure, and oxygen delivery.
Recognising the early signs matters most.