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Related Experiment Videos

Optic nerve evoked potentials elicited by electrical stimulation.

Yasuhiro Kikuchi1, Tatsuya Sasaki, Masato Matsumoto

  • 1Department of Neurosurgery, Fukushima Medical University.

Neurologia Medico-Chirurgica
|July 26, 2005
PubMed
Summary

Optic nerve evoked potentials (ONEP) reliably indicate visual function during surgery. This study shows ONEPs can monitor optic nerve integrity, aiding surgeons in preventing vision loss during neurosurgical procedures.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Surgical Monitoring

Background:

  • Intraoperative monitoring of visual function is crucial during neurosurgery.
  • Current methods may not always provide real-time, reliable feedback on optic nerve status.

Purpose of the Study:

  • To evaluate the optic nerve evoked potential (ONEP) as a reliable intraoperative indicator of visual function.
  • To assess the feasibility of using ONEP for monitoring optic nerve integrity during surgery.

Main Methods:

  • Experimental study in dogs using electrical stimulation of the optic nerve and recording of ONEPs.
  • Clinical study involving 15 patients undergoing craniotomy for parasellar tumors or aneurysms, with intraoperative ONEP recordings.

Main Results:

Related Experiment Videos

  • Stable and reproducible ONEPs were obtained in dogs, correlating amplitude reduction with nerve transection.
  • Reproducible intraoperative ONEPs were recorded in 14 of 15 human patients.
  • A patient with a poor ONEP outcome developed unilateral blindness, highlighting the indicator's potential.

Conclusions:

  • Optic nerve evoked potentials show promise as a reliable intraoperative tool for monitoring visual function.
  • ONEP monitoring can potentially help prevent postoperative visual deficits in patients undergoing optic nerve-related surgeries.