Objective: To study the impact on the surgical time of the multi-unit recordings (MURs) of deep brain activity in 20 years of movement disrorder neurosurgeries.

Background: The big impact on the surgical time of the single-unit recordings (SUR) for movement disorder neurosurgery targeting is currently broadly discussed and it also is the cause of having to explore simultaneously several electrode tracks, not all always indispensable finally. Even some have already preferred to not continue using of this functional guide, in spite of the well-known limitations of the current pre-surgical image guide. But the Prof. Chihiro Ohye’s MURs are almost already unknown internationally.

Methods: A retrospective descriptive statistical analysis of MUR length was made on 4,296 tracks in 952 surgeries during 20 years. The MUR length of each one of these explored tracks had been measured objetive and automatically by the used automated equipment for MUR. The exclusion criteria were: tracks with fewer than 5 recorded signals, tracks that had a signal length different from the habitual 2 s, or these being unusual situations not related to the MUR, as well as the first 20 surgeries of each surgical target (the learning process). It yielded a total of 3,448 tracks in 805 surgeries for this analysis.

Results: The mean and its confidence interval (p=0.05) of time per MUR track were 5.49+/-0.16 min. in subthalamic nucleus surgery, 8.82+/-0.24 min. in the internal globus pallidus and 18.51+/-1.31 min. in the ventral intermediate nucleus of the thalamus.

Conclusions: Contrary to SUR ,the impact of MUR on surgical time is completely acceptable for the use of this objective, functional and trans-surgical guide for targeting, without also having to use necessarily several simultaneous electrode tracks (not all always indispensable with previously explored track information). Consequently, there is less risk for the patient.

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MDS Abstracts - https://www.mdsabstracts.org/abstract/deep-brain-recording-and-surgical-time-in-stereotactic-and-functional-neurosurgery-for-movement-disorders/