Injury to the fingers results in impairment of both the hand and upper extremity. Injury may be in the form of amputation, or in terms of percent function loss.
percent of total impairment to hand =
= (percent hand impairment due to thumb injury) + (percent hand impairment due to index finger injury) + (percent hand impairment due to middle finger injury) + (percent hand impairment due to ring finger injury) + (percent hand impairment due to little finger injury)
The percent of total impairment to upper extremity due to a hand injury is looked up in correlation table (below).
Percent impairment of finger and hand based on level of amputation involving fingers of hand (after Figure 3, page 3/18, AMA 1995)
finger |
loss of distal IP |
hand impair |
loss of proximal IP |
hand impair |
loss at phalang-metacarp |
hand impair |
---|---|---|---|---|---|---|
thumb |
50% |
20% |
|
|
100% |
40% |
index |
45% |
9% |
80% |
16% |
100% |
20% |
middle |
45% |
9% |
80% |
16% |
100% |
20% |
ring |
45% |
5% |
80% |
8% |
100% |
10% |
little |
45% |
5% |
80% |
8% |
100% |
10% |
Percent impairment of the hand, related to percent impairment of the fingers (Table 1, page 3/18, AMA 1995).
impairment thumb |
impair hand |
index/middle |
impair hand |
ring/little |
impair hand |
---|---|---|---|---|---|
0-1 |
0 |
0-2 |
0 |
0-4 |
0 |
2-3 |
1 |
3-7 |
1 |
5-14 |
1 |
4-6 |
2 |
8-12 |
2 |
15-24 |
2 |
7-8 |
3 |
13-17 |
3 |
25-34 |
3 |
9-11 |
4 |
18-22 |
4 |
35-44 |
4 |
12-13 |
5 |
23-27 |
5 |
45-54 |
5 |
14-16 |
6 |
28-32 |
6 |
55-64 |
6 |
17-18 |
7 |
33-37 |
7 |
65-74 |
7 |
19-21 |
8 |
38-42 |
8 |
75-84 |
8 |
22-23 |
9 |
43-47 |
9 |
85-94 |
9 |
24-26 |
10 |
48-52 |
10 |
95-100 |
10 |
27-28 |
11 |
53-57 |
11 |
|
|
29-31 |
12 |
58-62 |
12 |
|
|
32-33 |
13 |
63-67 |
13 |
|
|
34-36 |
14 |
68-72 |
14 |
|
|
37-38 |
15 |
73-77 |
15 |
|
|
39-41 |
16 |
78-82 |
16 |
|
|
42-43 |
17 |
83-87 |
17 |
|
|
44-46 |
18 |
88-92 |
18 |
|
|
47-48 |
19 |
93-97 |
19 |
|
|
49-51 |
20 |
98-100 |
20 |
|
|
52-53 |
21 |
|
|
|
|
54-56 |
22 |
|
|
|
|
57-58 |
23 |
|
|
|
|
59-61 |
24 |
|
|
|
|
62-63 |
25 |
|
|
|
|
64-66 |
26 |
|
|
|
|
67-68 |
27 |
|
|
|
|
69-71 |
28 |
|
|
|
|
72-73 |
29 |
|
|
|
|
74-76 |
30 |
|
|
|
|
77-78 |
31 |
|
|
|
|
79-81 |
32 |
|
|
|
|
82-83 |
33 |
|
|
|
|
84-86 |
34 |
|
|
|
|
87-88 |
35 |
|
|
|
|
89-91 |
36 |
|
|
|
|
92-93 |
37 |
|
|
|
|
94-96 |
38 |
|
|
|
|
97-98 |
39 |
|
|
|
|
99-100 |
40 |
|
|
|
|
Percent impairment of the upper extremity, related to percent impairment of the hand (Table 2, page 3/19, AMA 1995).
hand |
upper extrem |
hand |
upper extrem |
hand |
upper extrem |
hand |
upper extrem |
---|---|---|---|---|---|---|---|
0 |
0 |
26 |
23 |
51 |
46 |
76 |
68 |
1 |
1 |
27 |
24 |
52 |
47 |
77 |
69 |
2 |
2 |
28 |
25 |
53 |
48 |
78 |
70 |
3 |
3 |
29 |
26 |
54 |
49 |
79 |
71 |
4 |
4 |
30 |
27 |
55 |
50 |
80 |
72 |
5 |
5 |
31 |
28 |
56 |
50 |
81 |
73 |
6 |
5 |
32 |
29 |
57 |
51 |
82 |
74 |
7 |
6 |
33 |
30 |
58 |
52 |
83 |
75 |
8 |
7 |
34 |
31 |
59 |
53 |
84 |
76 |
9 |
8 |
35 |
32 |
60 |
54 |
85 |
77 |
10 |
9 |
36 |
32 |
61 |
55 |
86 |
77 |
11 |
10 |
37 |
33 |
62 |
56 |
87 |
78 |
12 |
11 |
38 |
34 |
63 |
57 |
88 |
79 |
13 |
12 |
39 |
35 |
64 |
58 |
89 |
80 |
14 |
13 |
40 |
36 |
65 |
59 |
90 |
81 |
15 |
14 |
41 |
37 |
66 |
59 |
91 |
82 |
16 |
14 |
42 |
38 |
67 |
60 |
92 |
83 |
17 |
15 |
43 |
39 |
68 |
61 |
93 |
84 |
18 |
16 |
44 |
40 |
69 |
62 |
94 |
85 |
19 |
17 |
45 |
41 |
70 |
63 |
95 |
86 |
20 |
18 |
46 |
41 |
71 |
64 |
96 |
86 |
21 |
19 |
47 |
42 |
72 |
65 |
97 |
87 |
22 |
20 |
48 |
43 |
73 |
66 |
98 |
88 |
23 |
21 |
49 |
44 |
74 |
67 |
99 |
89 |
24 |
22 |
50 |
45 |
75 |
68 |
100 |
90 |
25 |
23 |
|
|
|
|
|
|
Specialty: Sports Medicine & Rehabilitation