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. 2020 May 30:opaa168. doi: 10.1093/ons/opaa168

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Copyright © 2020 by the Congress of Neurological Surgeons

This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)

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FIGURE 5. — The trocar can accommodate instrumentation ideally longer than 15 cm, as shown with a high-speed drill A and an endoscopic forcep B. The trocar is placed in the left nostril for the passage of instrumentation. The right nostril has rubber tubing taken from a Lukens tube, which will be used to pass the endoscope and ensure an adequate seal C. Placement of endoscope in the right nostril and high-speed drill through the trocar in left nostril D.