Petrous carotid canal dehiscence: an anatomic and radiographic study

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology
Matthew J HearstRavi N Samy

Abstract

Development of the osseous petrous carotid canal is frequently incomplete. Although dehiscence of the carotid canal has been observed in previous studies, the frequency and extent of bony dehiscence have not been quantified. Inadvertent internal carotid artery injury occurs in 3 to 5% of skull base procedures, with an additional 1.9% of patients having carotid artery vasospasm. Documentation of the incidence of petrous apex carotid canal dehiscence is therefore warranted. Ninety-nine cadaveric skulls were evaluated physically and by computed tomographic scan. Incidence of dorsal (endocranial) dehiscence of the petrous carotid canal was identified in 82.83% of the left side and 88.89% of the right side. Average dimensions for left dorsal dehiscence measured 10.81 mm longitudinally by 4.10 mm transversely. Dimensions for the right averaged 11.59 mm longitudinally by 4.29 mm transversely. Incidence of ventral (exocranial) dehiscence was less frequent: 37.37% on the left and 34.34% on the right. Ventral dehiscence was classified into major (absence of bone) and minor (fissure) types. Major dehiscence was observed in 8.08% and 6.06% of specimens for left and right sides, respectively; minor ventral dehiscence was present in 29.29% a...Continue Reading

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Citations

Dec 7, 2018·The Journal of Craniofacial Surgery·Satheesha B Nayak
Mar 30, 2016·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Jae-Jin SongKyogu Lee
Sep 20, 2018·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·E C TollJ W Rainsbury
Jul 12, 2019·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·George S LiuYona Vaisbuch

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