ho_trauma_index: HO Index (Haemostasis and Oxygenation) for Trauma

In cliot: Clinical Indices and Outcomes Tools

HO Index (Haemostasis and Oxygenation) for Trauma

Description

Calculates the HO Index, a simple prognostic tool for predicting mortality in trauma patients with acute hemorrhage. It combines a marker of coagulopathy (INR) with a marker of shock/tissue hypoperfusion (Lactate).

Usage

ho_trauma_index(inr, lactate_mmol_l)

Arguments

inr	Numeric. International Normalized Ratio (Admission).
lactate_mmol_l	Numeric. Arterial or venous lactate in mmol/L (Admission).

Value

A list containing:

HO_Score	The calculated index value (Formula: INR + Lactate/2).
Risk_Category	Risk stratification for in-hospital mortality (Low < 1.5, Intermediate 1.5-3.0, High >= 3.0).

References

Wafaisade A, Lefering R, Maegele M, et al. The HO-score: a simple tool to predict mortality in trauma patients with acute hemorrhage. Crit Care. 2016;20(1):193. doi:10.1186/s13054-016-1375-0

Examples

# Example 1: High Risk
# INR 2.0, Lactate 6.0
# Score = 2.0 + (6.0 / 2) = 5.0
ho_trauma_index(2.0, 6.0)

# Example 2: Low Risk
# INR 1.0, Lactate 0.8
# Score = 1.0 + (0.8 / 2) = 1.4
ho_trauma_index(1.0, 0.8)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.