Shock Index Calculator

Original Shock Index:
Modified Shock Index:

Index :

Modified index:

Shock Index

The Shock Index makes it possible to assess the seriousness of a patient in a state of shock, in particular in polytraumatized patients. An index ≥ 0.9 is correlated with high mortality. On a haemorrhage, a high index or modified index can help establish the indication for transfusion.

How to calculate the shock index?


Index = Heart Rate ÷ Systolic Blood Pressure.

Modified Index = Heart Rate ÷ Mean Blood Pressure.