Triggs K J, Ballock R T, Byrne T, Garfin S R
Department of Orthopaedics and Rehabilitation, University of California, San Diego 92103.
J Spinal Disord. 1993 Feb;6(1):34-7.
This study was designed to observe the length dependence of a well-molded fiberglass body cast attached to a halo on motion restriction in an unstable cadaveric cervical spine. Also, by using this technique, comparison between the immobilization provided by a body cast and that provided by a standard premolded polyethylene halo vest could be made. Extreme cervical instability was created on adult cadavers. A halo ring was applied and then attached to a fiberglass body cast or to a polyethylene halo vest. Sequential lateral cervical radiographs were obtained during maximum flexion as the body cast was shortened from the level of the iliac crests to the level of the xiphoid process. Radiographic motion was also assessed within the polyethylene halo vest. Results revealed minimal motion difference as the fiberglass body cast was sequentially shortened. In contrast, motions within the polyethylene halo vest were variable. These results suggest that cervical immobilization may be relatively independent of support structure length and that immobilization can be maintained by a well-fitting halo vest extending to the level of the xiphoid process.
本研究旨在观察附着于头环的成型良好的玻璃纤维身体支具在不稳定尸体颈椎中对运动限制的长度依赖性。此外，通过使用该技术，可以对头环身体支具与标准预成型聚乙烯头环背心提供的固定效果进行比较。在成年尸体上制造极端颈椎不稳定。应用头环，然后将其连接到玻璃纤维身体支具或聚乙烯头环背心上。当身体支具从髂嵴水平缩短至剑突水平时，在最大屈曲过程中依次获取颈椎侧位X线片。还对聚乙烯头环背心内的影像学运动进行了评估。结果显示，随着玻璃纤维身体支具依次缩短，运动差异最小。相比之下，聚乙烯头环背心内的运动则各不相同。这些结果表明，颈椎固定可能相对独立于支撑结构的长度，并且通过延伸至剑突水平的合身头环背心可以维持固定效果。
