Computed tomographic myelography of the cranial cervical spine in Warmblood horses with no spinal pathology-Inter- and intravertebral ratios and distribution of contrast columns in neutral and flexed cervical spine.

IF 2.4 2区 农林科学 Q1 VETERINARY SCIENCES
Maren Hellige, Caroline Schröder, Frauke Seehusen, Jessika-M Cavalleri, Karl Rohn, Peter Stadler, Florian Geburek
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Abstract

Background: Computed tomographic myelography (CTM) and radiographic myelography (RxM) are diagnostic for extradural spinal cord compression, but knowledge about the contrast distribution in flexion and normal position of nonaffected horses is lacking.

Objectives: (1) To determine the inter- and intravertebral ratios at C3-C4 of CTM in neutral and flexed positions in Warmbloods. (2) To compare the diameters of the spinal cord and the contrast columns at C3-C4 between neutral and flexed positions in CTM and RxM. (3) To evaluate the variability of measurements.

Study design: Terminal in vivo method-comparison study with histological confirmation of absence of spinal pathology.

Methods: RxM and CTM were performed in 13 neurologically normal Warmbloods in neutral and flexed cervical spine positions. Inter- and intravertebral ratios, the sagittal diameters of the spinal cord, the dorsal (dcc) and ventral contrast column (vcc) were calculated (in mm) and compared between the cervical spine positions.

Results: The flexion angle was 24° in both modalities. Flexion of the cervical spine led to a significant reduction of the diameter of the spinal cord in CTM (sc_inter2: 9.2 ± 1.1 (mean ± standard deviation) and 8.0 ± 1.4, p = 0.02; sc inter 3: 9.2 ± 1.3 and 7.7 ± 1.7, p = 0.007) and of the heights of the contrast columns in both modalities (dcc inter2: RxM: 10.2 ± 1.9 and 8.5 ± 2.1, p = 0.005; CTM: 8.8 ± 1.4 and 7.2 ± 2.0, p = 0.004; vcc inter3: RxM: 2.7 ± 1.3 and 0.9 ± 0.7, p < 0.001; CTM: 2.2 ± 1.2 and 0.0 ± 0.1, p < 0.001) at intervertebral locations.

Main limitations: Small group size, no calibration of radiographs.

Conclusions: Flexion of the cervical spine decreased the diameter of the spinal cord and the dorsal and ventral myelographic contrast columns in Warmbloods with no spinal pathology.

无脊柱病理的温血马颅颈椎的计算机断层脊髓造影-中性和屈曲颈椎的椎间和椎内比值和对比柱分布。
背景:计算机断层脊髓造影(CTM)和放射脊髓造影(RxM)可诊断硬膜外脊髓压迫,但对未受影响的马在屈曲和正常位置的造影剂分布缺乏了解。目的:(1)测定温血动物中位和屈曲位CTM的C3-C4椎间和椎内比值。(2)比较CTM和RxM中性位和屈曲位的脊髓直径和C3-C4对比柱。(3)评价测量结果的可变性。研究设计:终末体内法-与组织学证实无脊柱病理的比较研究。方法:对13例神经功能正常的温血患者在颈椎中屈位进行RxM和CTM检查。计算椎间比和椎内比,脊髓矢状直径,背侧(dcc)和腹侧对比柱(vcc)(以mm为单位),并比较颈椎位置之间的差异。结果:两种方式的屈曲角度均为24°。颈椎屈曲导致CTM脊髓直径显著减小(sc_inter2: 9.2±1.1(平均值±标准差)和8.0±1.4,p = 0.02;两者对比柱高度的差异(dcc inter2: RxM: 10.2±1.9和8.5±2.1,p = 0.005;CTM: 8.8±1.4和7.2±2.0,p = 0.004;vcc inter3: RxM: 2.7±1.3和0.9±0.7,p主要限制:小组规模小,无x线片校准。结论:温血动物无脊柱病变时,颈椎屈曲可使脊髓直径及脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型脊髓型对比柱直径减小。
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来源期刊
Equine Veterinary Journal
Equine Veterinary Journal 农林科学-兽医学
CiteScore
5.10
自引率
13.60%
发文量
161
审稿时长
6-16 weeks
期刊介绍: Equine Veterinary Journal publishes evidence to improve clinical practice or expand scientific knowledge underpinning equine veterinary medicine. This unrivalled international scientific journal is published 6 times per year, containing peer-reviewed articles with original and potentially important findings. Contributions are received from sources worldwide.
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