Daniel B L, Waanders N A, Zhang Y, Moskalik A, Fowlkes J B, Rubin J M, Goulet J A, Adler R S
Department of Radiology, University of Michigan Hospitals, Ann Arbor 48109.
Invest Radiol. 1994 Oct;29(10):933-9. doi: 10.1097/00004424-199410000-00012.
Management of distraction during Ilizarov limb lengthening remains primarily clinical and empirical. Estimates of tissue acoustic attenuation were evaluated for their ability to quantify bone formation within the distraction gap.
Five dogs had tibias lengthened by the method of Ilizarov. Mean acoustic attenuation measurements at multiple positions across the distraction gap were compared with corresponding x-ray computed tomography attenuation measurements.
Computed tomography and ultrasound attenuation displayed similar quantitative behavior across the gap. Linear correlation between them ranged from R2 = .878 to R2 = .131. Fibrous interzone width estimates based on computed tomography and ultrasound attenuation measurements were correlated, based on our preliminary data with R2 = .519. These estimates are independent of the width of distraction.
Ultrasound parallels computed tomography as a measure of bone formation within the distraction gap. Future studies are needed to improve acoustic attenuation data acquisition techniques and to evaluate their potential as a tool for optimizing early distraction rates in patients at risk for rate-related complications.
Ilizarov肢体延长术中牵张的管理仍主要基于临床经验。评估组织声衰减估计值量化牵张间隙内骨形成的能力。
五只犬采用Ilizarov方法进行胫骨延长。将牵张间隙多个位置的平均声衰减测量值与相应的X线计算机断层扫描衰减测量值进行比较。
计算机断层扫描和声衰减在整个间隙显示出相似的定量行为。它们之间的线性相关系数范围为R2 = 0.878至R2 = 0.131。基于计算机断层扫描和声衰减测量的纤维中间区宽度估计值相关，根据我们的初步数据，R2 = 0.519。这些估计值与牵张宽度无关。
超声与计算机断层扫描一样，可作为牵张间隙内骨形成的一种测量方法。未来需要开展研究以改进声衰减数据采集技术，并评估其作为优化有速率相关并发症风险患者早期牵张速率工具的潜力。
