Critical Care · Pulmonology

HACOR Score calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Heart rate at 1 hour of NIV (beats/min)

Use the HACOR score 1 hour after starting noninvasive ventilation (NIV) in adults with hypoxemic respiratory failure, as in the original derivation and validation cohorts.

Arterial pH

Glasgow Coma Scale at 1 hour of NIV

PaO₂/FiO₂ ratio at 1 hour of NIV (mm Hg)

Respiratory rate at 1 hour of NIV (breaths/min)

Result

Complete all required inputs to calculate the score.

Formula inputs

Heart rate at 1 hour of NIV (beats/min)
Arterial pH
Glasgow Coma Scale at 1 hour of NIV
PaO₂/FiO₂ ratio at 1 hour of NIV (mm Hg)
Respiratory rate at 1 hour of NIV (breaths/min)

Primary source

Duan J et al. Assessment of heart rate, acidosis, consciousness, oxygenation, and respiratory rate to predict NIV failure. Intensive Care Med. DOI: 10.1007/s00134-016-4601-3. PMID: 27812731 (2017)

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