X线联合超声对肢体延长术的监测价值

目的：比较普通X光片和B超检查在肢体延长中的作用，讨论两种检查方法在肢体延长术中的应用价值。方法：制作日本大耳白兔胫骨干截骨延长模型，术后7天开始延长，速率为1mm/d，延长到30%后停止延长矿化5周。利用普通X光片、多普勒超声观察肢体延长过程中延长区域骨痂及血运生长情况。结果：X线片：延长到第10天之前，延长区域看不到新生的骨痂，延长到30%，骨痂量明显增加，在截骨端开始出现骨皮质。矿化3周时开始出现髓腔。超声观察，延长初期延长区增生的血管及血流速度都有增加，以后逐渐较少，在延长1周左右开始有骨痂生成。延长到30%时，超声波已经很少能透过延长区域。结论：肢体延长过程中，普通X光片和超声检查各有优缺点，但是都必不可少，将两者联合应用，将是肢体延长术成功的必须条件。

Value of plain radiography combine with ultrasonography in monitoring limb lengthening

Objective:To discuss the application value of X-ray and ultrasound in the evaluation of limb lengthening.Methods:An osteotomy was done on the tibia in 10 rabbits.After a 7-day latency period,distraction was commenced at a rate of 1mm daily.Lengthening was continued to a 30% increase over initial bone length and then left to consolidate for 5 weeks.At the osteotomy site the new callus formation and the blood circulation was monitored by X-ray and ultrasound.Results:X-ray:When the the limb was lengthened to 1...