The use of Nd:YAG laser in pituitary surgery and evaluation of visual function by visual evoked potential (VEP)

1992 ◽  
Vol 15 (3) ◽  
pp. 193-197 ◽  
Author(s):  
Hamit Ziya G�kalp ◽  
Nihat Egemen ◽  
Adil �ulcuoglu ◽  
Sait Naderi ◽  
Ahmet Zorlutuna
Keyword(s):  
Nd:Yag Laser ◽  
Visual Function ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Pituitary Surgery ◽  
Visual Evoked

Efficacy of the visual evoked potential monitoring in endoscopic transnasal transsphenoidal surgery as a real-time visual function

2018 ◽  
Vol 66 (4) ◽  
pp. 1075 ◽  
Author(s):  
Daisuke Wajima ◽  
Fumihiko Nishimura ◽  
Young-Soo Park ◽  
Yasushi Motoyama ◽  
Ichiro Nakagawa ◽  
...  
Keyword(s):  
Real Time ◽  
Visual Function ◽  
Transsphenoidal Surgery ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Evoked Potential Monitoring ◽  
Visual Evoked ◽  
Potential Monitoring

Multifocal visual evoked potential evaluation for diagnosis of acute optic neuritis and for prediction of visual outcome and ganglion cell layer thinning following optic neuritis

2020 ◽  
pp. 135245852097573
Author(s):  
Gorm Pihl-Jensen ◽  
Benedikte Wanscher ◽  
Jette Lautrup Frederiksen
Keyword(s):  
Optic Neuritis ◽  
Ganglion Cell ◽  
Visual Function ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Conduction Block ◽  
Visual Outcome ◽  
Multifocal Visual Evoked Potential ◽  
Visual Evoked

Background:: While damage to the optic nerve following optic neuritis (ON) is readily quantifiable, the evaluation of prognosis for visual function and neuroaxonal loss in the acute ON is challenging. Objective:: The objective of this study is to investigate the value of multifocal visual evoked potential (mfVEP) in acute ON, diagnostically for acute ON and prognostically for visual outcome and subsequent ganglion cell/inner plexiform layer thickness (GCLIPLt). Methods:: A prospective cohort study of mfVEP and full-field visual evoked potential (ffVEP) in acute, unilateral ON (onset < 31 days) was conducted. Comparisons with healthy controls ( n = 30) and association analysis with follow-up optical coherence tomography (OCT) measurements (of the GCLIPLt) and visual function (Sloan low-contrast visual acuity (LCVA)) were conducted. Results:: Seventy-nine ON patients were included (mean: 17 days from onset). Excluding measurements with conduction block, ffVEP ( n = 54) and mfVEP ( n = 44) showed sensitivities of 89% and 84% to a specificity of 97%. 65/79 patients were re-examined (mean: 200 days follow-up). mfVEP amplitude and latency inter-eye asymmetry in acute ON correlated with GCLIPLt ( r = 0.587 and Spearman’s ρ = 0.597, for both, p < 0.001). mfVEP amplitude correlated with LCVA inter-eye asymmetry at follow-up ( r = 0.421, p < 0.001), mfVEP latency did not. Conclusion: mfVEP may support the prognostic evaluation of acute ON patients and prove valuable in future neuroprotective and remyelinating trials. In acute ON, the increase in diagnostic value of mfVEP to ffVEP may be limited due to widespread conduction block.

18. Intraoperative estimation of visual function using visual evoked potential

2009 ◽  
Vol 120 (5) ◽  
pp. e151
Author(s):  
Tatsuya Sasaki ◽  
Takeshi Itakura ◽  
Kyouichi Suzuki ◽  
Yuka Matsumoto ◽  
Hitoshi Ando ◽  
...  
Keyword(s):  
Visual Function ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Visual Evoked

Comparison Between Conventional Flash and Off-Response Intraoperative Visual Evoked Potential Monitoring for Endoscopic Endonasal Surgery

2021 ◽  
Author(s):  
Ridzky Firmansyah Hardian ◽  
Toshihiro Ogiwara ◽  
Atsushi Sato ◽  
Yu Fujii ◽  
Yota Suzuki ◽  
...  
Keyword(s):  
Visual Function ◽  
Predictive Value ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Light Stimulus ◽  
Warning Signal ◽  
Endoscopic Endonasal ◽  
Evoked Potential Monitoring ◽  
Flash Stimulation ◽  
Visual Evoked

Abstract BACKGROUND Intraoperative flash stimulation visual evoked potential (VEP) monitoring has been used for endoscopic endonasal approach (EEA). Recently, off-response VEP, which is recorded when the light stimulus is turned off, was introduced to monitor visual function intraoperatively. OBJECTIVE To evaluate off-response VEP monitoring in comparison with the conventional flash stimulation VEP monitoring for EEA. METHODS From March 2015 to March 2020, 70 EEA surgeries with intraoperative VEP monitoring (140 eyes) were performed. Light stimuli were delivered by a pair of goggle electrodes. Recording electrodes were placed on the scalp over the occipital region. The warning signal was prompted by a reduction of the peak-to-peak amplitude of the VEP by more than 50% compared to the initial amplitude. Visual function was assessed pre- and postoperatively. Results of flash and off-response VEP monitoring were compared. RESULTS VEP was recorded in 134 eyes. Warning signal occurred in 23 eyes (transient in 17 eyes and permanent in 6 eyes). Two eyes showed permanent VEP attenuation for flash VEP monitoring, in which one patient had postoperative visual function deterioration. Four eyes showed permanent VEP attenuation for off-response VEP monitoring, where 2 patients had postoperative visual function deterioration. Sensitivity, specificity, positive predictive value, and negative predictive value were 100%, 98.9%, 50%, and 100%, respectively, for flash stimulation VEP, and 100%, 97.8%, 50%, and 100%, respectively, for off-response VEP. CONCLUSION VEP monitoring was useful to monitor visual function in EEA surgery. Off-response VEP monitoring was not inferior to conventional flash stimulation VEP monitoring.

scholarly journals Visual Function with Acupuncture Tested by Visual Evoked Potential

2006 ◽  
Vol 209 (3) ◽  
pp. 235-241 ◽  
Author(s):  
Yoshiko Sagara ◽  
Nobuo Fuse ◽  
Motohiko Seimiya ◽  
Syunji Yokokura ◽  
Kei Watanabe ◽  
...  
Keyword(s):  
Visual Function ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Visual Evoked
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