Mercy Medical Center, Institute for Foot and Ankle Reconstruction, 301 St. Paul Place, Baltimore, MD 21202, USA.
Foot Ankle Int. 2011 Sep;32(9):896-9. doi: 10.3113/FAI.2011.0896.
The purpose of this study was to compare the brake reaction time of patients with successful right ankle fusion to normal volunteers without an ankle fusion.
Ten patients who underwent successful right ankle arthrodesis were evaluated using a driving simulator as well as an in-shoe pedobarographic measuring system. Brake reaction time, braking force, peak pressure, contact area, and the center of force between the foot and the brake pedal were recorded. SF-12 scores were obtained from all study patients. A control group of ten age-matched individuals without ankle fusion was included for comparison.
Mean brake reaction time for the ankle fusion group (0.42+/-0.14 seconds) was significantly slower than for the control group (0.33+/-0.06 seconds) (p=0.03). The center of force was consistently isolated to the forefoot in the ankle fusion group compared to controls who distributed the center of force over both the forefoot and midfoot. There was no significant difference between the ankle fusion and control groups with respect to braking force, peak pressure, or contact area.
The mean brake reaction time following successful right ankle arthrodesis was significantly slower than that of normal controls. However, the fusion group time was still below the threshold for what is defined as a safe brake reaction time by the United States Federal Highway Administration.
本研究的目的是比较成功行右踝关节融合术的患者与无踝关节融合的正常志愿者的制动反应时间。
使用驾驶模拟器和鞋内足底压力测量系统评估 10 例成功行右踝关节融合术的患者。记录制动反应时间、制动力量、峰值压力、接触面积和足部与制动踏板之间的力中心。所有研究患者均获得 SF-12 评分。纳入 10 名年龄匹配无踝关节融合的对照组进行比较。
融合组的平均制动反应时间（0.42+/-0.14 秒）明显慢于对照组（0.33+/-0.06 秒）（p=0.03）。与对照组相比，融合组的力中心始终局限于前足部，而对照组的力中心分布在前足部和中足部。融合组与对照组在制动力量、峰值压力或接触面积方面无显著差异。
成功行右踝关节融合术后的平均制动反应时间明显慢于正常对照组。然而，融合组的时间仍低于美国联邦公路管理局定义的安全制动反应时间阈值。
