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Table 1 Femoral medullary canal diameter

From: Development and mechanical testing of a short intramedullary nail for fixation of femoral rotational osteotomy in cerebral palsy patients

Patient Region 1 Region 2 Region 3 Region 4 Region 5
1 12.17 9.57 9.57 8.70 9.57
2 11.74 10.43 10.43 9.57 10.00
3 15.22 13.91 13.04 11.74 11.74
4 13.04 11.30 10.87 10.00 10.00
5 13.04 11.30 10.43 10.00 10.43
6 13.04 10.43 8.70 8.26 8.26
7 12.17 10.43 10.00 9.57 9.57
8 15.22 13.91 12.61 12.17 11.74
9 12.61 11.74 11.30 9.57 10.00
10 14.78 12.61 11.74 11.30 10.87
11 16.09 12.61 11.74 10.00 10.00
12 15.65 14.35 12.61 12.61 12.61
13 11.74 10.43 9.57 8.26 8.26
14 16.52 14.35 12.61 10.87 11.74
15 13.04 10.87 10.43 9.57 9.57
16 11.30 9.57 8.26 8.26 9.57
17 13.04 10.43 9.57 8.70 8.26
18 10.43 9.57 8.26 8.26 8.26
19 13.04 10.87 10.43 10.00 9.57
20 10.43 8.70 8.26 8.26 9.57
21 13.91 13.04 11.30 9.57 9.57
22 12.17 10.43 9.57 9.57 10.00
23 12.17 11.30 10.87 10.00 10.43
24 12.17 10.87 10.43 9.57 9.57
25 12.61 10.43 10.00 9.13 9.13
mean 13.09 11.34 10.50 9.74 9.93
median 13.04 10.87 10.43 9.57 9.57
standard deviation 1.65 1.59 1.39 1.22 1.14
minimum 10.43 8.70 8.26 8.26 8.26
maximum 16.52 14.35 13.04 12.61 12.61
  1. Region 1: 3 cm distal to the lesser trochanter; Region 2: 5 cm distal to the lesser trochanter; Region 3: 6 cm distal to the lesser trochanter; Region 4: 8 cm distal to the lesser trochanter; Region 5: 10 cm distal to the lesser trochanter
  2. Diameter (mm) of the medullary canal at five levels related to the lesser trochanter measured on radiographs of the uninvolved femur of patients with Legg-Calvé-Perthes disease at the age of 10 years.