Saternus K S, Koebke J, von Tamaska L
Forensic Sci Int. 1986 Jul 14;31(3):167-74. doi: 10.1016/0379-0738(86)90184-2.
The intradural sagittal diameter at the second cervical vertebra (SD/C2) of 62 SIDS cases was measured myelographically. This SD/C2 proved to be dependent on body size, body weight, and age. A clear, age-dependent difference is to be found in the primarily narrow spinal canal. This parameter (SD/C2), which is more precisely defined in adults on the basis of clinical, radiological, and autopsical findings is assumed to have the value of 0.5 cm in the first 2 months, 0.6 cm in the third month, and 0.65 cm in the fourth month. The resulting potential danger to infants is dependent upon their position. The SD/C2, was significantly decreased in extension as compared to a neutral posture. With consideration of the primarily narrow spinal canal in the infant, there is, according to our measurements, a potential hazard for the infant in any further, significant shortening of the SD/C2. This is independent of the width of the spinal canal under maximal extension. We found individual cases in which the SD/C2 was decreased by almost 50% from the normal value in neutral position. No correlation was found between the primary width of the spinal canal and the degree of luminal reduction upon extension.
对62例婴儿猝死综合征（SIDS）病例的第二颈椎硬膜内矢状径（SD/C2）进行了脊髓造影测量。结果表明，该SD/C2取决于身体大小、体重和年龄。在原本狭窄的椎管中可发现明显的、与年龄相关的差异。根据临床、放射学和尸检结果，在成人中更精确界定的这个参数（SD/C2），在出生后的前2个月被认为值为0.5厘米，第3个月为0.6厘米，第4个月为0.65厘米。由此对婴儿产生的潜在危险取决于他们的姿势。与中立姿势相比，SD/C2在伸展时显著减小。考虑到婴儿原本狭窄的椎管，根据我们的测量，SD/C2的任何进一步显著缩短都对婴儿存在潜在危险。这与最大伸展时椎管的宽度无关。我们发现个别病例中，SD/C2从中立位置的正常值下降了近50%。未发现椎管的初始宽度与伸展时管腔缩小程度之间存在相关性。
