The anatomic analysis of the vidian canal and the surrounding structures concerning vidian neurectomy using computed tomography scans.

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The anatomic analysis of the vidian canal and the surrounding structures concerning vidian neurectomy using computed tomography scans.

Braz J Otorhinolaryngol. 2017 Dec 26;:

Authors: Açar G, Çiçekcibaşı AE, Çukurova İ, Özen KE, Şeker M, Güler İ

Abstract
INTRODUCTION: The type of endoscopic approach chosen for vidian neurectomy can be specified by evaluating the vidian canal and the surrounding sphenoid sinus structures.
OBJECTIVE: The variations and morphometry of the vidian canal were investigated, focusing on the functional correlations between them which are crucial anatomical landmarks for preoperative planning.
METHODS: This study was performed using paranasal multidetector computed tomography images that were obtained with a section thickening of 0.625mm of 250 adults.
RESULTS: The distributions of 500 vidian canal variants were categorized as follows; Type 1, within the sphenoid corpus (55.6%); Type 2, partially protruding into the sphenoid sinus (34.8%); Type 3, within the sphenoid sinus (9.6%). The pneumatization of the pterygoid process is mostly seen in vidian canal Type 2 (72.4%) and Type 3 (95.8%) (p<0.001). The mean distances from the vidian canal to the foramen rotundum and the palatovaginal canal were greater in the vidian canal Type 2 and 3 with the pterygoid process pneumatization (p<0.001). The prevalence of the intrasphenoid septum between the vidian canal and the vomerine crest and lateral attachment which ending on carotid prominence were much higher in vidian canal Type 3 than other types (p<0.001). The mean angle between the posterior end of the middle turbinate and the lateral margin of the anterior opening of the vidian canal was measured as 33.05±7.71°.
CONCLUSIONS: Preoperative radiologic analysis of the vidian canal and the surrounding structures will allow surgeons to choose an appropriate endoscopic approach to ensure predictable postoperative outcomes.

PMID: 29337014 [PubMed - as supplied by publisher]

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