The Assesment of Acoustical and Electromagnetic Noise On EEG Monitoring During Spinal Surgery Operations

Gokmen N., Oniz A., Bayazit O., Erdogan U., AKKAN T., ÖZKURT A., ...More

JOURNAL OF NEUROLOGICAL SCIENCES-TURKISH, vol.26, no.4, pp.472-483, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 4
  • Publication Date: 2009
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.472-483
  • Keywords: Anesthesia, operation room, electromagnetic noise, acoustical noise, EEG, CAROTID ENDARTERECTOMY, ROOMS, ENVIRONMENT, ANESTHESIA, ISCHEMIA
  • Dokuz Eylül University Affiliated: Yes


In this paper, the effect of acoustical and electromagnetic (EM) noise sources on the electrophysiological recordings related to brain functions have been investigated. As a seperate issue, the effect of EM noise during operation which influence the patient, anesthesia and surgery teams was also targeted. The results indicate (16 operation sessions) the presence of between 49.85-79.94 dB, (mean 63.10 +/- 5.37) ongoing acoustical noise throughout the surgery. Among the different EM noises sources, electrocautery was found to be the highest one that effected the electrophysiological recording (248.0 mGauss). During the operation of this device, the EM effect resulted in some 400 times larger amplitude scale magnitude than the normal range, contaminating the recordings. Vacuum pumps (52.0 mGauss), surgical lamps (0.1 mGauss), monitors (1.0 mGauss) each displayed a different degree of EM noise. The vacuum pump and the movement related artefacts caused large scale slow oscillations. The abovementioned noise sources have been investigated in relation to electrophysiological quality as well as operation room health conditions. By means of assuring a certain quality for the performance of these very sensitive EEG like devices (BIS etc.), it would be possible to assess the functioning of the nervous system through high resolution data recordings. The overall results can serve to highlight the brain functioning and to establish a platform as research model to clinical studies.