Clinical Study Of Trigeminal Gasserian Ganglion Evoked Potentials

【Objective】Different methods were used to detect the evoked potentials of the trigeminal nerve,and to explore its evaluation of the trigeminal nerve conduction pathway and its possible significance,so as to further guide the possibility of clinical application.【Methods】In August 2017 to April 2018 in the second people’s hospital of guangdong province neurosurgery were parallel balloon compression treatment of 30 patients with unilateral trigeminal neuralgia,will improve retained patient general condition and imaging data in detail.All patients were treated with the same surgical procedures and procedures,respectively recording the scalp stimulation potential of each patient,the trigeminal nerve evoked potentials of the brain stem and the evoked potentials of the trigeminal nerve.The scalp stimulation potential was determined as a blank control group,and the brain stem trigeminal nerve evoked potential was defined as the control group.An O-shaped arm was used to evaluate the position and depth of the stimulus electrodes.The electrophysiological stimulation electrode was implanted into Meckle’s cavity,and the electrode was placed in the scalp C5/C6,and the reference electrode was extremely Fz,with the stimulation of the square wave,and the stimulation current intensity of 10 m A,with a total of 5Hz,and 100 superpositions.All three patients situation,the incubation period of the waveform and derivation of the wave amplitude,the TGGEP amplitude of each two mark in the record,and the determination of stimulating electrode and a half months after the mark and the fusion image section of the wall distance,the selection of the most closely relationship with nerve mark points.The extraction rate,latent period and amplitude of waveform were analyzed.【Result】Respectively to observation group and the control group and blank control group waveform leads to compare,waveform derivation rate of observation group was obviously higher than that of control group,and blank control group not waveform leads,prove in the trigeminal nerve area can’t draw out the corresponding waveform,and will observe group and control group in waveform which leads to the situation compared with intraoperative average blood pressure and heart rate,no difference.Will observe group and control group which leads to the incubation period of the waveform and amplitude comparison,the observation group rf waveform which leads to the situation and always line of thermosetting contrast,there was an obvious difference,the result and with mark1-2 and mark2-3 of wave incubation period and amplitude comparison no differences,that as long as the electrodes in trigeminal ganglia,can appear credible waveform,and the rf heat coagulation technique for nerve damage will affect the derivation of the waveform.【Conclusion】The trigeminal gasserian ganglion evoked potential is an innovative method,and its yield and waveform are better than TSEP..We think the trigeminal nerve and half day of evoked potential is likely to be of intraoperative monitoring scheme and etiological lesion to study and put forward a new train of thought,may be better for the treatment of certain diseases development way of surgical treatment on the development of functional neurosurgery offer more choice.