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Clinical Notice:OpiCalc is not a substitute for professional clinical judgment. Always verify dosages and guidelines.

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Recent Journal Updates

Cancer MedicineJun 8, 2026
Retrospective Analysis of HER2 Testing, Treatment Patterns, and Clinical Outcomes in Patients With Locally Advanced or Metastatic NSCLC With HER2 Mutations in France

Clinical Context

We think this has broad domain relevance to Shock Index (SI).

Emerging Infectious DiseasesJun 5, 2026
Clinical Predictors of Fatal Outcomes from Human Leptospirosis, Thailand, 2015–2024

Clinical Context

We think this has broad domain relevance to Shock Index (SI).

JAMAJun 2, 2026
Can Multicancer Detection Blood Tests Save Lives?

Clinical Context

We think this has broad domain relevance to Shock Index (SI).

Shock Index

Shock Index: A simple ratio (HR/SBP) to detect occult shock when vital signs appear deceptively normal.

Guidelines & Evidence

Verified

Last Review: 2026

When to Use

Last Comprehensive Review: 2026

Guidelines & Evidence

Verified

Last Review: 2026

When to Use

The Shock Index (SI) is a simple, bedside ratio of heart rate to systolic blood pressure. It is used to identify "occult shock"—patients who maintain a normal blood pressure through compensatory mechanisms but are at high risk for clinical deterioration and massive hemorrhage.
Normal SI is 0.5 - 0.7. An SI ≥ 0.9 is a common clinical threshold for increased mortality risk and the need for aggressive intervention.

Related Scores in Practice

In clinical practice, this assessment is frequently evaluated alongside other validated measures. Depending on the patient's presentation and specific diagnostic requirements, you may also need to utilize the Shock Index, Abc Massive Transfusion Score, TASH Score or the MAP Calculator to formulate a comprehensive care plan.

Last Comprehensive Review: 2026

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