OcrV1, Main, Exploration, bibRecord, 000568

Endoscopic transsphenoidal optic nerve decompression: an anatomical study

Identifieur interne : 000568 ( Main/Exploration ); précédent : 000567; suivant : 000569

Endoscopic transsphenoidal optic nerve decompression: an anatomical study

Auteurs : Marco Locatelli [Italie] ; Manuela Caroli [Italie] ; Mauro Pluderi [Italie] ; Federica Motta [Italie] ; Sergio Maria Gaini [Italie] ; Manfred Tschabitscher [Autriche] ; Pietro Scarone [Italie]

Source :

Surgical and radiologic anatomy : (Print) [ 0930-1038 ] ; 2011.

RBID : Pascal:11-0186713

Descripteurs français

Pascal (Inist)
- Endoscopie, Voie transsphénoïdale, Nerf optique, Chirurgie, Décompression, Endoscope, Base crâne, Médecine, Traitement.
Wicri :
- topic : Chirurgie, Médecine.

English descriptors

KwdEn :
- Base of the skull, Endoscope, Endoscopy, Medicine, Optic nerve, Pressure relief, Surgery, Transsphenoidal route, Treatment.

Abstract

Purpose The endoscopic trans-nasal, transsphenoidal approach is considered by many a valid option to reach the sellar region and, in selected case, to decompress the optic nerve. However, few data are available from the literature about the real effectiveness of the procedure and the extent of nerve decompression needed to obtain a clinical result. The aim of this anatomical study was to describe the most important landmarks of the endoscopic transsphenoidal approach to the optic nerve. Methods Six silicone-injected cadaver heads were dissected via the endoscopic trans-nasal approach, performing a bilateral optic nerve decompression. The lateral optocarotid recess (OCR) and optic canal were identified in each case. Moreover, the relationship between the ophthalmic artery at its origin and the optic nerve was examined. Results 12 decompressions of the optic nerve were performed, obtaining the following measurements: intercarotid distance 12 mm ± 1.5, median length of OCR 5 mm ± 1, average length of optic nerve decompression 15 mm ± 2. The ophthalmic artery was observed emerging from the internal carotid artery (ICA) medially in six cases, ventrally in four cases and laterally in two cases. Conclusion A wide optic nerve decompression may be obtained with transsphenoidal approach. However, the risk of ophthalmic artery injury seems to be more relevant than with supratentorial approaches, due to the intimate relationship between artery and nerve on its inferior surface. Knowledge of anatomical landmarks, such as lateral OCR and the position of the ophthalmic artery, is useful to prevent this injury.

Affiliations:

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Base of the skull</term>
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<front><div type="abstract" xml:lang="en">Purpose The endoscopic trans-nasal, transsphenoidal approach is considered by many a valid option to reach the sellar region and, in selected case, to decompress the optic nerve. However, few data are available from the literature about the real effectiveness of the procedure and the extent of nerve decompression needed to obtain a clinical result. The aim of this anatomical study was to describe the most important landmarks of the endoscopic transsphenoidal approach to the optic nerve. Methods Six silicone-injected cadaver heads were dissected via the endoscopic trans-nasal approach, performing a bilateral optic nerve decompression. The lateral optocarotid recess (OCR) and optic canal were identified in each case. Moreover, the relationship between the ophthalmic artery at its origin and the optic nerve was examined. Results 12 decompressions of the optic nerve were performed, obtaining the following measurements: intercarotid distance 12 mm ± 1.5, median length of OCR 5 mm ± 1, average length of optic nerve decompression 15 mm ± 2. The ophthalmic artery was observed emerging from the internal carotid artery (ICA) medially in six cases, ventrally in four cases and laterally in two cases. Conclusion A wide optic nerve decompression may be obtained with transsphenoidal approach. However, the risk of ophthalmic artery injury seems to be more relevant than with supratentorial approaches, due to the intimate relationship between artery and nerve on its inferior surface. Knowledge of anatomical landmarks, such as lateral OCR and the position of the ophthalmic artery, is useful to prevent this injury.</div>
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Endoscopic transsphenoidal optic nerve decompression: an anatomical study

Endoscopic transsphenoidal optic nerve decompression: an anatomical study

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri