Direct brainstem recording of auditory evoked potentials during vestibular schwannoma resection: nuclear BAEP recording. Technical note and preliminary results

Journal of Neurosurgery
Cordula Matthies, Madjid Samii

Abstract

The usefulness of intraoperative monitoring in cerebellopontine angle surgery should be improved by obtaining faster and stronger brainstem auditory evoked potential (BAEP) responses. A new technique of direct recording at the brainstem has been developed, which is applicable to all tumor sizes. By placing a retractor with electrodes attached to its tip at the cerebellomedullary junction, the authors have recorded BAEP amplitudes that are 10 times greater than those recorded using the conventional technique. Only small sampling numbers (64-256 recordings) are required and are obtained in 5 to 15 seconds. The technique has been applied successfully in 34 patients who underwent vestibular schwannoma resections. It has also been tested in patients with intrameatal-extrameatal meningiomas and in those with vascular compressive disorders; there have been no false results. The advantages of this new technique are: 1) identification of BAEP components is easier and faster; 2) reliable BAEP responses are obtained in some cases in which conventional BAEP responses are lost or severely deformed; and 3) BAEP response deterioration and improvement are recognized earlier than would occur using the conventional technique. This last advantage...Continue Reading

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Citations

Oct 25, 2014·Journal of Neurosurgery·Hirofumi NakatomiNobuhito Saito
Feb 26, 2004·Muscle & Nerve·C Michel Harper
Jul 4, 2007·The Laryngoscope·Ingo Ulrik TeudtClaus-Peter Richter
Feb 14, 2007·Neurosurgery·Alireza GharabaghiMadjid Samii
Aug 22, 2008·Neurosurgery·Madjid Samii, Venelin M Gerganov
Aug 3, 2011·Acta neurochirurgica·Marcus André AciolyMarcos Tatagiba
Aug 2, 2014·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Stefan RamppJulian Prell
Apr 19, 2000·Arquivos de neuro-psiquiatria·F LeitãoF Leitão Filho

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