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Erschienen in: Acta Neurochirurgica 2/2014

01.02.2014 | Experimental Research - Neurosurgical Techniques

Anterior video-assisted approach to the craniovertebral junction: transnasal or transoral? A cadaver study

verfasst von: Massimiliano Visocchi, Giuseppe La Rocca, Giuseppe Maria Della Pepa, Egidio Stigliano, Alessandro Costantini, Francesco Di Nardo, Giulio Maira

Erschienen in: Acta Neurochirurgica | Ausgabe 2/2014

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Abstract

Background

Endoscopy represents both an alternative and useful complement to the standard microsurgical approach to the anterior craniovertebral junction (CVJ). Nevertheless, few studies provide an experimental comparison between transnasal and transoral endoscopic control on CVJ. We compared the surgical exposition angle and the working channel volume of both the transnasal and transoral approaches in the cadaver.

Methods

Eleven fresh non-perfused cadavers were studied. Transnasal and transoral linear and angled exposure of the CVJ were evaluated by means of X-ray and CT scan both in sagittal and lateral planes.

Results

The transoral endoscopic surgical exposition was wider compared with the transnasal in anterior and lateral projections:(1)in the sagittal plane, both in vertical exposition (transnasal inferior to transoral from 5.89 % to 76.48 %, average 35.89 %) and in vertical surgical angle (from 22 % to 77.42 %, average 56.53 %); (2)in the coronal plane, both in coronal exposition (transnasal inferior to transoral from 50.77 % to 83.88 %, average 70.34 %) and in coronal surgical angle (from 65.58 % to 86.71 %, average 76.70 %). The sagittal surgical domain was found to spanning from the inferior third of the clivus to C3 with the transoral and from the middle third of the clivus to the nasopalatal line (NPL) with the transnasal approach. The overlapping surgical domain area was found to be the inferior third of the clivus.

Conclusions

The endoscope assisted transoral approach allows a better surgical control of the CVJ. It provides a better CVJ exposure, in sagittal and transverse planes, providing a larger working channel and an easier manoeuvrability. The transnasal approach is limited in caudal direction down to the NPL, otherwise the transoral approach is limited in the rostral direction with a maximum to the foramen magnum in normal specimen. In every individual case, pros and cons of the appropriate approach have to be taken into account as well as the choice of a combined transnasal and transoral approaches strategy.
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Metadaten
Titel
Anterior video-assisted approach to the craniovertebral junction: transnasal or transoral? A cadaver study
verfasst von
Massimiliano Visocchi
Giuseppe La Rocca
Giuseppe Maria Della Pepa
Egidio Stigliano
Alessandro Costantini
Francesco Di Nardo
Giulio Maira
Publikationsdatum
01.02.2014
Verlag
Springer Vienna
Erschienen in
Acta Neurochirurgica / Ausgabe 2/2014
Print ISSN: 0001-6268
Elektronische ISSN: 0942-0940
DOI
https://doi.org/10.1007/s00701-013-1910-y

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