Eliminating diathermy-induced artifacts during intraoperative monitoring of somatosensory-evoked potentials: A hardware solution

1991 ◽  
Vol 7 (4) ◽  
pp. 320-324 ◽  
Author(s):  
Cor J. Kalkman ◽  
Kees Romijn ◽  
Wim Denslagen









2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Krishnatej Vedala ◽  
S. M. Amin Motahari ◽  
Mohammed Goryawala ◽  
Mercedes Cabrerizo ◽  
Ilker Yaylali ◽  
...  

We present a study and application of quasi-stationarity of electroencephalogram for intraoperative neurophysiological monitoring (IONM) and an application of Chebyshev time windowing for preconditioning SSEP trials to retain the morphological characteristics of somatosensory evoked potentials (SSEP). This preconditioning was followed by the application of a principal component analysis (PCA)-based algorithm utilizing quasi-stationarity of EEG on 12 preconditioned trials. This method is shown empirically to be more clinically viable than present day approaches. In all twelve cases, the algorithm takes 4 sec to extract an SSEP signal, as compared to conventional methods, which take several minutes. The monitoring process using the algorithm was successful and proved conclusive under the clinical constraints throughout the different surgical procedures with an accuracy of 91.5%. Higher accuracy and faster execution time, observed in the present study, in determining the SSEP signals provide a much improved and effective neurophysiological monitoring process.



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