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

Table 1 Femoral medullary canal diameter

*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

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
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.

ISSN: 1475-925X