Canal wall down mastoidectomy
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A canal-wall-down mastoidectomy comprises of a group of mastoidectomies which is more open and extensive than a canal-wall-up mastoidectomy. In addition to traditional forms various modified form are now performed (see modified canal wall down mastoidectomy).
They initially comprise the similar steps as in canal-wall-up mastoidectomy, but in addition the posterior wall of the external auditory canal is resected to increase exposure to middle ear contents and the Koerner's septum is removed. The eustachian tube is obliterated to completely isolate the middle ear 3.
-<p>A <strong>canal-wall-down mastoidectomy</strong> comprises of a group of <a title="Mastoidectomies" href="/articles/mastoidectomy">mastoidectomies</a> which is more open and extensive than a canal-wall-up mastoidectomy. In addition to traditional forms various modified form are now performed (see <a title="modified canal wall down mastoidectomy" href="/articles/modified-canal-wall-down-mastoidectomy">modified canal wall down mastoidectomy</a>).</p><p>They initially comprise the similar steps as in canal-wall-up mastoidectomy, but in addition the posterior wall of the external auditory canal is resected to increase exposure to middle ear contents and the <a href="/articles/koerner-septum-1">Koerner's septum</a> is removed.</p>- +<p>A <strong>canal-wall-down mastoidectomy</strong> comprises of a group of <a href="/articles/mastoidectomy">mastoidectomies</a> which is more open and extensive than a canal-wall-up mastoidectomy. In addition to traditional forms various modified form are now performed (see <a href="/articles/modified-canal-wall-down-mastoidectomy">modified canal wall down mastoidectomy</a>).</p><p>They initially comprise the similar steps as in canal-wall-up mastoidectomy, but in addition the posterior wall of the external auditory canal is resected to increase exposure to middle ear contents and the <a href="/articles/koerner-septum-1">Koerner's septum</a> is removed. The eustachian tube is obliterated to completely isolate the middle ear <sup>3</sup>.</p>
References changed:
- 1. Juliano A, Ginat D, Moonis G. Imaging Review of the Temporal Bone: Part II. Traumatic, Postoperative, and Noninflammatory Nonneoplastic Conditions. Radiology. 2015;276(3):655-72. <a href="https://doi.org/10.1148/radiol.2015140800">doi:10.1148/radiol.2015140800</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/26302389">Pubmed</a>
- 2. Kim B, Kim H, Lee S, Lee E, Lee S, Lee J. Outcomes of Modified Canal Wall Down Mastoidectomy and Mastoid Obliteration Using Autologous Materials. Clin Exp Otorhinolaryngol. 2019;12(4):360-6. <a href="https://doi.org/10.21053/ceo.2018.01333">doi:10.21053/ceo.2018.01333</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/30700087">Pubmed</a>
- 3. Mendlovic M, Monroy Llaguno D, Schobert Capetillo I, Cisneros Lesser J. Mastoid Obliteration and Reconstruction Techniques: A Review of the Literature. J Otol. 2021;16(3):178-84. <a href="https://doi.org/10.1016/j.joto.2021.01.002">doi:10.1016/j.joto.2021.01.002</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/34220986">Pubmed</a>
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