• Yoji Tanaka, Daisu Abe, Motoki Inaji, Shoko Hara, Ryosuke Sakai, and Taketoshi Maehara.
• Department of Neurosurgery, Tokyo Medical and Dental University, Tokyo, Japan. Electronic address: tanaka.nsrg@tmd.ac.jp.
• World Neurosurg. 2024 Oct 1; 190: e348e354e348-e354.

ObjectiveTo evaluate the effectiveness of a "telestration" system in which the mentor annotates the view of the surgical field, for endoscopic transsphenoidal surgery (ETS).MethodsThe use of telestration was evaluated for sellar floor-opening during ETS and for a task performed using ETS simulation training. During ETS, the mentor outlined the opening area of the sella turcica on the monitor and then the trainee surgeon opened the sella, either with the telestration displayed (telestration (+) group, n = 8) or without (telestration (-) group, n = 7). In the task using an ETS training model, 18 subjects were asked to touch the indicated targets with the forceps, once with the instructions given via telestration and once with verbal instructions only.ResultsDuring ETS, the telestration (+) group had a significantly higher concordance rate between the planned bone window and actual bone window than the telestration (-) group (92.97 ± 4.16% vs. 77.57 ± 10.51%, P = 0.014). In the ETS model, the time required to finish the task was significantly less with telestration than with verbal instructions alone (P = 0.002). None of the subjects had errors when telestration was used, while subjects made an average of 0.33 ± 0.59 errors and had to re-listen to the instructions 0.27 ± 0.46 times when only verbal instructions were given.ConclusionsThe use of the telestration system during ETS facilitated the communication of the mentor's intentions to the trainee surgeon and contributed to safer, more accurate surgery. The system was also thought to be useful in reducing operative time.Copyright © 2024 Elsevier Inc. All rights reserved.

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