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Shock Index Calculator
Assess hemodynamic instability using heart rate and systolic blood pressure
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Educational Use Only: This tool is for educational purposes only. It does not replace clinical judgment or medical advice.
Enter Vital Signs
bpm
mmHg
Shock Index Formula:
Shock Index (SI) = Heart Rate ÷ Systolic Blood Pressure
Normal Range: 0.5 - 0.7
Clinical Significance: Early indicator of hemodynamic compromise
Shock Index Categories:
• <0.5: Low SI - Possible bradycardia or hypertension
• 0.5-0.7: Normal SI - Stable hemodynamics
• 0.7-1.0: Elevated SI - Early shock, consider volume depletion
• 1.0-1.3: High SI - Significant instability, urgent intervention
• >1.3: Very high SI - Severe shock, emergency care
Clinical Applications:
The shock index is a simple, rapid assessment tool for detecting early hemodynamic compromise before blood pressure drops significantly.
Advantages: Early detection of shock, useful in trauma, sepsis, and hemorrhage. Can identify patients who need urgent intervention.
Limitations: Not specific for cause of shock. Consider clinical context, other vital signs, and patient symptoms for complete assessment.
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