Goobar J E, Pate D, Resnick D, Sartoris D J
Department of Rheumatology, Hospital for Rheumatic Disease, Ostersund, Sweden.
Can Assoc Radiol J. 1987 Dec;38(4):271-4.
A prospective evaluation of dynamic lateral lumbar spine radiographs in the erect position in 52 symptomatic patients over the age of 50 years revealed vacuum phenomena in intervertebral discs in 46%. Their frequency was greatest at the L5-S1 spinal level and decreased progressively at higher lumbar levels. Analysis of the dependency of discal vacuum phenomena on spinal position during radiography revealed that hyperextension detected all such phenomena; radiography in the neutral position detected 73% of vacuum phenomena, whereas that obtained with the spine flexed revealed 20% of vacuum phenomena. Our results indicate that lateral radiographs of the hyperextended lumbar spine are useful in the differential diagnosis of intervertebral osteochondrosis (degenerative disease of the nucleus pulposus) and infection.
对52名50岁以上有症状患者的腰椎动态侧位X线片进行前瞻性评估，结果显示46%的患者椎间盘出现真空现象。其发生率在L5-S1椎间隙最高，在更高的腰椎节段逐渐降低。对椎间盘真空现象与放射检查时脊柱位置关系的分析表明，过伸位X线片能检测到所有此类现象；中立位X线片能检测到73%的真空现象，而脊柱屈曲位X线片仅能检测到20%的真空现象。我们的结果表明，腰椎过伸位侧位X线片有助于椎间盘骨软骨病（髓核退行性疾病）和感染的鉴别诊断。
