摘要
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。
Abstract
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 10%, there was obvious distraction occurred without any evidence of new bone formation within the distraction sites. When lengthened to 30%, much more callus at the lengthening area and the cortical bone appeared at both ends. Mineralized 3 weeks later, medullary cavity appeared. Ultrasound: In the early stage, the amount of the micrangium and blood flow increased and then decreased gradually. After 1 week, some speckled echogenic at the distraction site could be seen. When the limb lengthened to 30%, ultrasound can rarely penetrate the distraction gap. Conclusion: Traditional plain radiography and ultrasonography have their respective advantage and disadvantage. Evaluation of the newly formed bone with combination of the two methods is the cornerstone for terminating the limb lengthening successfully.
关键词
骨延长术 /
放射摄影术 /
超声检查 /
多普勒 /
彩色
Key words
Bone lengthening /
Radiography /
Ultrasonography /
Doppler /
color
袁 宇;舒衡生;师红立.
X线联合超声对肢体延长术的监测价值[J]. 中国临床医学影像杂志. 2011, 22(1): 27-30
YUAN Yu;SHU Heng-sheng;SHI Hong-li.
Value of plain radiography combine with ultrasonography in monitoring limb lengthening[J]. Journal of China Clinic Medical Imaging. 2011, 22(1): 27-30
中图分类号：
Ｒ687.3
Ｒ814.41
R445.1
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