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. 2018 Apr 27;18:115. doi: 10.1186/s12884-018-1737-x

Table 1.

Thresholds that trigger the CRADLE VSA Early Warning System

Hypertension Thresholds
Light and Arrow Results Category Blood Pressure (mmHg)
RED LIGHT & UP ARROW Severe hypertension ≥ 160 and / or ≥ 110
YELLOW LIGHT & UP ARROW Hypertension ≥ 140 & ≤ 159 and / or ≥ 90 & ≤ 109
GREEN LIGHT Normal <  140 and < 90
Shock Index (SI) Thresholds
Light and Arrow Results Category Shock Index (HR / sBP)
RED LIGHT & DOWN ARROW Severe shock ≥ 1.7
YELLOW LIGHT & DOWN ARROW Shock ≥ 0.9 and < 1.7
GREEN LIGHT Normal <  0.9