Röntgenmorphometrie und Myelographie der kaninen Lendenwirbelsäule im Hinblick auf die Darstellbarkeit definierter ventrolateraler epiduraler Raumforderungen

Radiographic morphometry and myelography of the canine lumbar spine with regard to the diagnosis of defined ventrolateral epidural space occupying lesions. Neurologic disorders with suspicion of space occupying lesions in the vertebral canal are not always visible in myelographic standard projections (VD and Si-DeL). For these indications it might be helpful to include 45°-oblique myelograms in the radiologic procedure for a precise localisation of the involved segment or side, as verified by own results and references. For the investigation 20 euthanized small-breed (group 1), 20 middle-size-breed (group 2) and 21 large-breed dogs (group 3) were needed. The 1069 simulated ventrolateral epidural space occupying lesions in three different balloonvolume-sizes (l.) were not visible in 23% (246 of 1069 l.) of the routine VD and Si-DeL views, but in the 45°-oblique projections. In group 1 22.6% (l.= 119) of the small lesions, in group 2 58% (l.= 118) of the small and 14.4% (l.= 118) of the middle-size-lesions and in group 3 66.4% (l.= 119) of the small, 32% (l.= 119) of the middle-size-, and 10% (l.= 119) of the large lesions became diagnosed only in 45°-oblique myelograms. In comparison to the 45°-oblique myelograms in which the lesions were visible in 100% (l.= 1069), they became depicted in 68% (l.= 1069) in the VD and only in 36% (l. = 1069) in the Si-DeL view. The possibility to evaluate ventrolateral masses in 45°-oblique views and in no other projections increases significantly with the weight and body length. The most important factors are the diameter of the dural sac, the medulla spinalis and the epidural space.In all three groups of dogs measurements were made on: the vertebral canal hight and width, spinal cord hight and width, dural sac hight and width and the epidural space hight and width. Not expected morphometric differences were seen especially in group 2. In these, the ratio between the vertebral canal to the dural sac decreased from L4 to S1 faster than in the other two groups. This leads to absolutely smaller dural sacs caudal L7. The dural sacs in group 2 also end earlier in comparison to the other groups. By the examination of different breeds a significant variability of the measured diameters was observed. In conclusion the diameter of the dural sac and epidural space depends not only on the size of the dog, but also on the breed (eg. Dobermann pinsher, Foxhound, Staffordshire- and Pitbull-Terrier and Dachshound).Signifikant correlations between the end of the dural sac and the crown-rump length, the breed or the age of the dogs could not be proved.

Level thesis:degree_level

thesis.doctoral

Grantor dc:publisher

Ludwig-Maximilians-Universität

Year

2003

Author dc:creator

• Goth, Ursula

Repository record source_url

https://edoc.ub.uni-muenchen.de/1081/

OAI identifier oai:identifier

oai:edoc.ub.uni-muenchen.de:1081