Étude anatomique et radio-anatomique des plexus veineux intra-rachidiens lombo-sacrés

Computed tomography permits reliable demonstration of the spinal canal and its contents. Measurements of the sagittal diameter of the bony canal do not take into consideration size, shape and state of intraspinal soft tissue structures, i.e. the thecal sac and its own contents, epidural fat and blood circulation pattern. Three particularly illustrative cases were selected in which obvious epidural venous engorgement was visualized in association with spinal stenosis. The authors think that epidural venous stasis occurring in segmental spinal stenosis is a CT sign of clinically significant narrowing of the neural canal. Accurate recognition of the type of lumbar stenosis together with epidural blood flow alterations permits a better understanding of the existing lesions. Thus, a more precise and specific surgical approach is possible.

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Technique for injection of the lumbar vertebral venous plexuses employed in anatomic, computed tomography and magnetic resonance imaging studies

Plaisant¹,

Sarrazin

Gillot

et al. 1998

Surg Radiol Anat

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The aim of this study was to develop a technique for injection of the vertebral venous plexuses allowing anatomic, computed tomography (CT) and magnetic resonance imaging (MRI) studies of the same anatomic specimen. It proved in practice that only a correctly adjusted mixture of different agents allowed attainment of this objective. This mixture, composed of gelatin, gadolinium and minium, enabled us to attain this end. The description of the technique of injecting the vertebral venous plexuses, the difficulties encountered and the results of the different imaging techniques are analysed in this study without entering into details of the anatomic description. The core of the study consists of 11 unembalmed subjects. Three were injected with gelatin mixed with gadolinium, one with latex mixed with minium, one with latex mixed with gadolinium, and 6 with gelatin mixed with both gadolinium and minium. Only the mixture of gelatin-gadolinium-minium allowed study of the same anatomic specimen in terms of anatomy, CT and MRI. Two different MRI sequences are described, evidence of the different properties of the injection mixture (gelatin, gadolinium). The latex-minium mixture gave good CT density but was unsuitable for MRI studies. Numerous artifacts caused interference with the radiologic images, calling for perfect injection technique. The use of several radiologic techniques for a single cadaveric injection allows better correlation of the images, and comparison and verification of results between the techniques.

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Étude anatomique et radio-anatomique des plexus veineux intra-rachidiens lombo-sacrés

Cited by 4 publications

References 2 publications

Principales voies de drainage du système veineux cranio-spinal

Principales voies de drainage du système veineux cranio-spinal

Epidural venous stasis in spinal stenosis

Technique for injection of the lumbar vertebral venous plexuses employed in anatomic, computed tomography and magnetic resonance imaging studies

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