Mizumoto Y, Mizuta H, Nakamura E, Takagi K
Department of Orthopaedic Surgery, Kumamoto University School of Medicine, Japan.
Acta Orthop Scand. 1995 Jun;66(3):275-7. doi: 10.3109/17453679508995541.
We evaluated in 20 Japanese white rabbits the effects of tibial lengthening on tibial nerve conduction and intraneural blood flow at the end of lengthening. Both tibiae were distracted 1 mm per day. The distraction frequency was in 2 steps (0.5 mm/12 h) on the right side and in 120 steps (0.0083 mm/12 min) on the left. The rabbits were separated into 4 subgroups based on the percentage of lengthening: 0 (control), 10, 20, and 30 percent. In the 2-step group, nerve conduction was delayed at 20 and 30 percent lengthening, compared to the control group, while in the 120-step group, it was delayed only at 30 percent lengthening. Intraneural blood flow in the 2-step group was decreased at 10, 20, and 30 percent lengthenings, while in the 120-step group it was reduced at 30 percent lengthening. Our findings indicate that an increase in the frequency of distraction reduces the impairment of nerve function during bone lengthening.
我们在20只日本白兔身上评估了延长结束时胫骨延长对胫神经传导和神经内血流的影响。双侧胫骨均以每天1毫米的速度进行牵引。右侧的牵引频率分2步（0.5毫米/12小时），左侧分120步（0.0083毫米/12分钟）。根据延长百分比将兔子分为4个亚组：0（对照组）、10%、20%和30%。在2步组中，与对照组相比，延长20%和30%时神经传导延迟，而在120步组中，仅在延长30%时神经传导延迟。2步组在延长10%、20%和30%时神经内血流减少，而120步组在延长30%时神经内血流减少。我们的研究结果表明，增加牵引频率可减少骨延长过程中神经功能的损害。
