Retrolabyrinthine approach

Beek-King, Jessica Van; McKinnon, Brian J.

doi:10.1016/j.otot.2013.06.010

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…5 6 The exposure of the posterior cranial fossa via a presigmoid retrolabyrinthine approach depends on the positional relationship of the SS and of the PSCC in an anteroposterior plane and of the Superior Petrosal Sinus (SPS) and of the JB in a superoinferior plane. 5 6 9 The more forward placed the SS is, the more constricted the exposure via this corridor gets. This leads to twofold consequences.…”

Section: Discussionmentioning

confidence: 99%

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Study of Sigmoid Sinus Variations in the Temporal Bone by Micro Dissection and its Classification – A Cadaveric Study

Singh

Irugu

Sikka

et al. 2019

Int Arch Otorhinolaryngol

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Introduction Sigmoid sinus (SS) variations have been classified variously in the literature. These classifications suffer from some form of shortcoming from a clinical point of view for their application. Objective We propose a clinically relevant classification of the SS in relation to the posterior semicircular canal (PSCC) and to the exposure of the presigmoid dural plate. The positioning of the SS was analyzed with reference to the volume of the mastoid and to the level of mastoid pneumatization. Methods A total of 94 formalin-preserved human cadaveric temporal bones were microdissected to carry out a complete mastoidectomy. The SS, the presigmoid dural plate, and the PSCC were exposed, and the position of the former was analyzed in relation to the latter two in order to classify the position of the SS into three grades. Results Grade I had the best exposure of the presigmoid dura and of the PSCC, while grade III had the poorest exposure of the presigmoid dura and of the PSCC. Grade I SS was associated with good pneumatization and higher mastoid volumes compared with grades II and III. Conclusions The SS exhibits considerable anatomic variability. A favorable positioning of the SS is associated with a large mastoid volume and pneumatization. A careful preoperative study of the imaging may help in understanding the positioning of the SS and the safety of various transmastoid approaches.

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Section: Discussionmentioning

confidence: 99%

“…Even if the access to the area of concern is obtained, venturing into it via this constrained corridor may hamper maneuvering in the target region and may result in difficulty in achieving complete disease removal, adequate dural closure, and sealing of the cerebrospinal fluid (CSF) leak with the attendant adverse outcomes. 5 6 9…”

Section: Discussionmentioning

confidence: 99%