Estudo comparativo da localização do seio venoso sagital dorsal no crânio de cães braquicefálicos e mesaticefálicos para craniotomia transfrontal / Comparative evaluation of the dorsal sagittal sinus localization on braquicephaly and mesaticephaly skulls to transfrontal craniotomy

AUTOR(ES)

Thaís Fernanda da Silva Machado

DATA DE PUBLICAÇÃO

2006

RESUMO

The surgical approaches for craniotomy are describe since the fifties. However, this realization is limited, many times for the absence conclusive diagnosis. The non invasive methods like computed tomography, the lesion locatization and type are easily made. The most important surgical approach is transfrontal craniotomy which promoves brain access. The principal landmarks to the surgery are the dura mater venous sinus. The objetive of this study was to analise the surgical access relation to the dorsal sagittal sinus and to compare with the different skull type: mesaticephalic and braquicephalic. Sixteen skulls from 8 Boxer dogs, 5 Mongrel dogs, 1 Rottweiler, 1 Labrador and 1 Pinscher. The sinus path was studied by solution of bario and látex whith coloured pigment injection. The dorsal sagittal sinus relation was studied by CT image analysis. The braquicephalic skulls showed cephalic index = 91,24 and cranio facial index = 2,89, and the mesaticephalic skulls presents 79,77 and 1,92 for cephalic and crânio facial index. The dorsal sagittal sinus path was delimited, and the medium of the zigomatic arc is this begging and the occipital bone the final, in both skull types. The venous sinus mensurations interface to the skull are: area = 7,35+/-2,51; D1 = 6,65+-2,27; D2 = 16,17+-4,08; D3 = 15,75-+5,09; D4 = 18,33+-5,25 e D5 = 18,04+-5,87 in mesaticephalic dogs and the medium mensurations da area = 10,18+-4,69; D1 = 11,84+-2,35; D2 = 19,57+-2,61; D3 = 17,88+-2,31; D4 = 25,32+-5,68 e D5 = 24,84=-4,40 in braquicephalic group. The área, D4 and D5 mensurations presents statistic difference (P<0,05), which show the skull form difference betwen the two groups, and the edge for the surgical approach to the brain.

ASSUNTO(S)

cérebro venous sinus braquicefálico craniotomy brain craniotomia braquicephalic seio venoso

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