Physiotherapy
Range of Motion (ROM) Deficit & Joint Impairment Calculator (AMA Guides)
Calculates active joint range-of-motion deficits and percentage impairment against AMA reference standards.
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Parameters
Range of Motion (ROM) Deficit & Joint Impairment Calculator (AMA Guides) Result
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Formula
ROM Deficit % = ([Normal Total Arc - Measured Total Arc] / Normal Total Arc) × 100
Reference normative arcs derived from AMA Guides to the Evaluation of Permanent Impairment.Clinical Pearls
Standard objective clinical outcome measurement tracking progress across orthopedic rehabilitation, post-fracture recovery, and workers' compensation impairment ratings.
Limitations
Universal goniometer placement error is typically ± 5°; always compare against the contralateral uninvolved limb as a baseline.