Resumo

TOCO-OLIVARES, I G et al. Morphometric study of the asterional point and its relationship with the dural venous sinuses. Cuad. - Hosp. Clín. [online]. 2019, vol.60, n.2, pp.16-21. ISSN 1562-6776.

Abstract INTRODUCTION: The importance of knowing the different anatomical repairs that involve the bony part of the posterior fossa with neurovascular structures, decreases the incidence of complications related to its access within the neurosurgical procedure. MATERIALS AND METHODS: Descriptive study based on the evaluation of 90 dry hemicranial, from the Anatomy Museum of the Universidad Mayor de San Andrés. RESULTS: The prevalence of asterion type I was 28.9%, while that of type II was 71.1%. The prevalence ofthe number of emissary veins was: One vein 54.4%, Two veins 42.2% and Three veins 3.3%. The averages for morphometric characteristics are as follows: from Asterion to external occipital protuberance 68.8 mm, from Asterion to suprameatal crest 50.1 mm, from Asterion to emissary vein 54.1 mm, from Asterion to Vertex from the mastoid process 54.1 mm and from asterion to horizontal plane of Frankfurt 14.6 mm. The location of asterion in the transverse sinus was the following: at the same level of the sinus 47.8% of the cases, in the elbow in 13.3%, superior to the sinus 31.1% and inferior to this in the 7.8%. CONCLUSIONS: There is a difference in some morphometric results of the asterion with respect to other authors, which could determine a different cranial configuration for our population. This should be considered to avoid complications during the transoperative period in a posterior fossa surgery. These results reflect the need to carry out a study with a larger population, in order to have real results, thus establishing cutting parameters that will allow us to have our own bibliography on how to proceed in our surgical activity.

Palavras-chave : Asterion; craniometry; venous sinuses.

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