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- Giese, Dina, et al.
(författare)
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Carotid Artery Compression Caused by the Cochlea
- 2015
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Ingår i: Otology and Neurotology. - 1531-7129 .- 1537-4505. ; 36:7, s. 1275-1278
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Tidskriftsartikel (refereegranskat)abstract
- Hypothesis We investigated the possible interference between the human internal carotid artery and the cochlea. Background The cochlea and the internal carotid artery (ICA) are anatomically closely related in the human temporal bone. The intimacy may even result in functional interferences. Methods Here, we analyzed 324 human plastic inner ear corrosion casts including the ICA canal and jugular bulb. Results Results showed that in 23% (14 cases), the cochlea caused physical impression in the carotid canal (CA) with luminal restriction. In one case, there was no separation between the CC and the basal turn of the cochlea. The distance between the CC and the cochlea varied between 0 and 1 mm among these 14 specimens. The lumen restriction of the CC in the pyramid-axial projection varied between 39% and 79%. Conclusion We speculate that the reduction in ICA canal lumen size caused by the cochlea may form a predilection site for intratemporal ICA plaque formation and therefore be clinically relevant.
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| 2. |
- Li, Hao, 1984-, et al.
(författare)
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Aeration of the Human Prussak's Space : A 3D Synchrotron Imaging Study
- 2021
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Ingår i: Otology and Neurotology. - : Lippincott Williams & Wilkins. - 1531-7129 .- 1537-4505. ; 42:7, s. E894-E904
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: Prussak's space (PS) is an intricate middle ear region which may play an essential role in the development of middle ear disease. The three-dimensional (3D) anatomy of the human PS and its drainage routes remain relatively unknown. Earlier studies have histologically analyzed PS, by micro-dissection and endoscopy. Here, we used synchrotron-radiation phase-contrast imaging (SR-PCI), 3D reconstructions, and modeling to study the framework of the human PS, including aeration pathways. It may lead to increased understanding of development of middle ear pathology.Design: Nine human temporal bone specimens underwent in-line SR-PCI at the Canadian Light Source in Saskatoon, Saskatchewan, Canada. Data were processed with volume-rendering software to create 3D reconstructions using scalar opacity mapping and segmentations to visualize its walls in fixed, undecalcified human temporal bones.Results: The PS was found to be an irregular, variably shaped chamber with different aeration systems. Three different drainage pathways were found: 1) via the posterior malleolar pouch of von Troltsch in seven of nine ears; 2) directly posterior-inferior into the mesotympanum medial to the posterior malleolar pouch in one ear; and 3) anteriorly in another. The posterior-inferior communications depended on the anatomy of the posterior malleolar fold. In one bilateral case, the aeration differed between the ears. Earlier descriptions of upper ventilation routes between the PS and the epitympanic spaces could not be substantiated.Conclusions: The 3D anatomy of the membrane folds organizing the PS in humans was demonstrated for the first time using in-line SR-PCI. The PS was always aerated into the mesotympanum, suggesting its relative independence of attic ventilation. The impact of its various drainage routes on middle ear ventilation and disease were discussed.
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