Real-Time Intraoperative Monitoring during Neurosurgical and Neuroradiological Procedures

  • R. J. Chabot
  • E. R. John
  • L. S. Prichep
Conference paper


As neurosurgical and neuroradiological techniques and equipment have advanced, the ability to preserve the functional integrity of neurologically compromised central nervous system structures has become more of a reality. Neurophysiological monitoring systems have been shown to be quite useful in this regard. Brainstem auditory and somatosensory evoked potentials (BAEP’s and BSEP’s) have been utilized to monitor lateral and medial brainstem function (1, 2, 3) during posterior fossa procedures. Subcortical and cortical somatosensory evoked potentials have been monitored during surgical and radiological procedures for aneurysms, AVM’s, and tumors (4, 5, 6, 7). Visual evoked potentials (VEP’s) have been monitored during procedures where visual system structures are deemed to be at risk (AVM’s, pituitary and sella turcica tumors) (8, 9, 10). Finally, 7th and 8th cranial nerve function has been monitored with brainstem auditory and facial evoked potentials (11, 12). In fact, a recent review of the literature uncovered over 200 monitoring papers published over the past 10 years.


Posterior Fossa Digital Filter Wave Shape Acoustic Neuroma Spinal Cord Tumor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    Hashimoto, I.; Ishiyama, Y.; Totsuka, G.; Mizutani, H.: Monitoring brainstem function during posterior fossa surgery with brainstem auditory evoked potentials. In: C. Barber (ed.): Evoked Potentials. Baltimore, University Park Press, 1980; 377–390.Google Scholar
  2. 2.
    Raudzens, P.A.; Shetter, A.G.: Intraoperative monitoring of brainstem auditory evoked potentials. Neurosurg., 1982; 57: 341–348.CrossRefGoogle Scholar
  3. 3.
    Piatt, J.H.; Radtke, R.A.; Erwin, C.W.: Limitations of brainstem auditory evoked potentials for in traoperative monitoring during a posterior fossa operation: Case report and technical note. Neurosurg., 1985; 16: 818–821.CrossRefGoogle Scholar
  4. 4.
    Carter, L.P.; Raudzens, P.A.; Ginaes, C.; Crowell, R.M.: Somatosensory evoked potentials and cortical blood flow during craniotomy for vascular disease. Neurosurg., 1984; 15: 22–28.CrossRefGoogle Scholar
  5. 5.
    Tamaki, T.; Takano, H.; Takakuwa, K.: Spinal cord monitoring: Basic principles and experimental aspects. Central Nervous System Trauma, 1985; 2: 137–149.PubMedGoogle Scholar
  6. 6.
    Nuwer, M.R.; Dawson, E.: Intraoperative evoked potential monitoring of the spinal cord: Enhanced stability of cortical recordings. Electroenceph. Clin. Neurophysiol., 1984; 59: 318–327.PubMedCrossRefGoogle Scholar
  7. 7.
    Berenstein, A.; Young, W.; Ransohoff, J.; Benjamin, V.; Merkin, H.: Somatosensory evoked potentials during spinal angiography and therapeutic transvascular embolization. J. Neurosurg., 1984; 60: 777–785.PubMedCrossRefGoogle Scholar
  8. 8.
    Feinsod, M.; Selhorst, J.B.; Hoyt, W.F.; Wilson, C.B.: Monitoring optic nerve function during craniotomy. J. Neurosurg., 1976; 44: 29–31.PubMedCrossRefGoogle Scholar
  9. 9.
    Albright, A.L.; Sclabassi, R.J.: Cavitron ultrasonic surgical aspirator and visual evoked potential monitoring for chiasmal gliomas in children. J. Neurosurg., 1985; 63:138–140.PubMedCrossRefGoogle Scholar
  10. 10.
    Costa, E.; Silva, I.; Wang, A.D.; Symon, L.: The application of flash visual evoked potentials during operations on the anterior visual pathways. Neurol. Res., 1985; 7: 11–16.Google Scholar
  11. 11.
    Prichep, L.S.; John, E.R.; Ransohoff, J.; Cohen, N.; Benjamin, V.; Ahn, H.: Real-time intraoperative monitoring of cranial nerves VII and VIII during posterior fossa surgery. In: C. Morocutti; P.A. Rizzo (eds.): Evoked Potentials: Neurophysiological And Clinical Aspects. Elsevier Science Publishers, 1985; 193–202.Google Scholar
  12. 12.
    Ojemann, R.G.; Levine, R.A.; Montgomery, W.M.; McGaffigan, P.: Use of intraoperative auditory evoked potentials to preserve hearing in unilateral acoustic neuroma removal. J. Neurosurg., 1984; 61: 938–948.PubMedCrossRefGoogle Scholar
  13. 13.
    Fridman, J.; John, E.R.; Bergelson, M.; Kaiser, J.B.; Baird, H.W.: Application of digital filtering and automatic peak detection to brainstem auditory evoked potentials. Electroenceph. Clin. Neurophysiol., 1982; 53: 405–416.PubMedCrossRefGoogle Scholar
  14. 14.
    John, E.R.; Baird, H.; Fridman, J.; Bergelson, M.: Normative values for brainstem auditory evoked potentials obtained by digital filtering and automatic peak detection. Electroenceph. Clin. Neurophysiol., 1983; 54:153–160.Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1988

Authors and Affiliations

  • R. J. Chabot
    • 1
  • E. R. John
  • L. S. Prichep
  1. 1.Psychiatry Department, Brain Research LaboratoryNYU Medical CenterNew YorkUSA

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