open access

Vol 61, No 4 (2002)
ORIGINAL ARTICLES
Published online: 2002-08-29
Submitted: 2012-02-06
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Analysis of operating field area in transpyramidal retrolabyrinthine approach to posterior cranial fossa

Stanisław Nitek, Jarosław Wysocki, Eliza Brożek
Folia Morphol 2002;61(4):305-308.

open access

Vol 61, No 4 (2002)
ORIGINAL ARTICLES
Published online: 2002-08-29
Submitted: 2012-02-06

Abstract

Retrolabyrinthine surgical access to the posterior and middle cranial fossa has a long history of use during the procedures aiming at the removal of small neoplasmatic changes located in the area of the internal auditory tube. A precise knowledge of the anatomical alterations of the temporal bone in the aspect of the retrolabyrinthine access to the posterior cranial fossa determines a successful otoneurosurgical endoscopy, which involves a relatively narrow area. Fortyfour cadaver temporal bones of both sexes were measured to obtain the dimensions of the surgical area limited by the sigmoid sinus, superior petrosal sinus and posterior labyrinth. The techniques of computer picture analysis were applied in the research. The mean value of the surface area of the figure limited by the sigmoid sinus, superior petrosal sinus and posterior semicircular canal was 175.9 mm² with no significant differences between sexes and sides. The maximal measured value was 356 mm², and the minimal was 84.3 mm². The size of the surgical area is characterised by large deviation range but was always sufficient to insert the endoscopic device and standard otosurgical instruments.

Abstract

Retrolabyrinthine surgical access to the posterior and middle cranial fossa has a long history of use during the procedures aiming at the removal of small neoplasmatic changes located in the area of the internal auditory tube. A precise knowledge of the anatomical alterations of the temporal bone in the aspect of the retrolabyrinthine access to the posterior cranial fossa determines a successful otoneurosurgical endoscopy, which involves a relatively narrow area. Fortyfour cadaver temporal bones of both sexes were measured to obtain the dimensions of the surgical area limited by the sigmoid sinus, superior petrosal sinus and posterior labyrinth. The techniques of computer picture analysis were applied in the research. The mean value of the surface area of the figure limited by the sigmoid sinus, superior petrosal sinus and posterior semicircular canal was 175.9 mm² with no significant differences between sexes and sides. The maximal measured value was 356 mm², and the minimal was 84.3 mm². The size of the surgical area is characterised by large deviation range but was always sufficient to insert the endoscopic device and standard otosurgical instruments.
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Keywords

otosurgery; retrolabyrinthine approach; sigmoid sinus; labyrinth; superior petrosal sinus; temporal bone

About this article
Title

Analysis of operating field area in transpyramidal retrolabyrinthine approach to posterior cranial fossa

Journal

Folia Morphologica

Issue

Vol 61, No 4 (2002)

Pages

305-308

Published online

2002-08-29

Bibliographic record

Folia Morphol 2002;61(4):305-308.

Keywords

otosurgery
retrolabyrinthine approach
sigmoid sinus
labyrinth
superior petrosal sinus
temporal bone

Authors

Stanisław Nitek
Jarosław Wysocki
Eliza Brożek

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