MDCalc

Hack’s Impairment Index (HII)

Provides a quantitative and standardized assessment of the degree of alcohol-induced impairment in emergency department patients.

Use this score to objectively track and monitor symptoms of impairment in patients who present to the Emergency Department with alcohol-induced impairment.

Speech quality and mentation

Response content

Gross motor skills

Stability on sitting, standing, and walking

Eye movement

Accuracy of tracking a moving finger with eyes and nystagmus

Coordination with target pursuit

Touching their finger to examiner’s finger

Fine motor skills

Ability to trace a curve between two printed lines on a piece of paper

Result:

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Advice

Total score should decrease in a predictable manner with each assessment. The score cannot be calculated if more than one assessment is refused by the patient.