The brainstem auditory evoked response (BAER) is sensitive to pontomesencephalic integrity, transtentorial brain herniation, and at times increased intracranial pressure (ICP). The authors report their experience utilizing a recently described rapid rate, binaural, click and 1,000-Hz tone-burst modification of the BAER (MBAER) in 22 symptomatic non-trauma patients with non-brainstem compressive space-taking cerebral lesions. The majority presented with mild to moderate clinical signs suggestive of increased ICP, and focal neurological deficits. The cerebral lesions, mostly tumors (17), averaged 4-5 cm in diameter, with radiological signs of mass effect such as flattening of the sulci, midline shift, and narrowing of the basal cisterns. A number of significant changes in Wave V and V n latency and less so amplitude were found in patients compared with age-matched normal volunteers, as well as those again studied after surgical decompression. Similar MBAER changes had been noted in normal volunteers placed in a dependent head position. Possible mechanisms to explain these findings are discussed. The methodology shows promise and if combined with automated peak recognition could make Neuro ICU monitoring practical. © 2012 Springer-Verlag/Wien.
CITATION STYLE
Stone, J. L., Fino, J., Vannemreddy, P., & Charbel, F. (2012). Modified brainstem auditory evoked responses in patients with non-brainstem compressive cerebral lesions. In Acta Neurochirurgica, Supplementum (Vol. 114, pp. 81–85). Springer-Verlag Wien. https://doi.org/10.1007/978-3-7091-0956-4_14
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