Estimating Impairment Due to Skin Disorder

Robinson reported a computation chart in 1973 for calculating the percent impairment to the individual with a significant skin disorder.

Anatomic Division	Percent of Total
entire head and neck	30%
trunk	5%
left upper extremity, from shoulder to hand	20%
right upper extremity, from shoulder to hand	20%
left lower extremity, from buttock to food	12.5%
right lower extremity, from buttock to food	12.5%
total	100%

from left Example, page 208

Subdivisions of Head and Neck	Percent of Subtotal
center of face	60%
left side of head, including ear	5%
right side of head, including ear	5%
scalp and back of head	10%
chin	10%
neck	10%
total	100%

from left Example, page 208

Subdivisions of Upper Extremity	Percent of Subtotal
arm	10%
forearm	10%
hand	80%
total	100%

from left Example page 208

not part of left Example, page 208 (my addition)

Subdivisions of Lower Extremity	Percent of Subtotal
hip and thigh	5%
leg	15%
foot	80%
total	100%

from left Example, page 208

total percent impairment =

= SUM((percent of body region) * (percent of subtotal) * (percent whole body))

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Purpose: To estimate the impairment to the patient caused by a skin disorder by the distribution of significant lesions.