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The inferior cochlear vein: surgical aspects in cochlear implantation
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Otolaryngology and Head and Neck Surgery.
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2016 (English)In: European Archives of Oto-Rhino-Laryngology, ISSN 0937-4477, E-ISSN 1434-4726, Vol. 273, no 2, 355-361 p.Article in journal (Refereed) Published
Abstract [en]

The patency of the inferior cochlear vein (ICV) may be challenged in cochlear implantation (CI) due to its location near the round window (RW). This may be essential to consider during selection of different trajectories for electrode insertion aiming at preserving residual hearing. Venous blood from the human cochlea is drained through the ICV. The vein also drains blood from the modiolus containing the spiral ganglion neurons. Surgical interference with this vein could cause neural damage influencing CI outcome. We analyzed the topographical relationship between the RW and ICV bony channel and cochlear aqueduct (CA) from a surgical standpoint. Archival human temporal bones were further microdissected to visualize the CA and its accessory canals (AC1 and AC2). This was combined with examinations of plastic and silicone molds of the human labyrinth. Metric analyses were made using photo stereomicroscopy documenting the proximal portion of the AC1, the internal aperture of the CA and the RW. The mean distance between the AC1 and the anterior rim of the RW was 0.81 mm in bone specimens and 0.67 mm assessed in corrosion casts. The AC1 runs from the floor of the scala tympani through the otic capsule passing parallel to the CA to the posterior cranial fossa. The mean distance between the CA and AC1 canal was 0.31 and 0.25 mm, respectively.

Place, publisher, year, edition, pages
2016. Vol. 273, no 2, 355-361 p.
Keyword [en]
Cochlea; Human; Inferior cochlear vein; Cochlear implants
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URN: urn:nbn:se:uu:diva-265774DOI: 10.1007/s00405-015-3549-1ISI: 000368990700013PubMedID: 25700831OAI: oai:DiVA.org:uu-265774DiVA: diva2:866539
Swedish Research Council, A0290401Swedish Research Council, A0290402EU, FP7, Seventh Framework Programme, 281056
Available from: 2015-11-03 Created: 2015-11-03 Last updated: 2016-03-02Bibliographically approved

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Zhang, HongLeiLiu, WeiRask-Andersen, Helge
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