The Significance of Recording Electrode Placement in Test-Retest of Electroneuronography / 대한이비인후과학회지

ABSTRACT

ENoG is regarded as a valuable method for quantitatively assessing facial nerve function, however it is occasionally discorrelated with clinical findings. So its utility may be diminished, especially in the serial tests. So, we endeavored to find the suitable position of recording electrode in test-retest variability of ENoG. We performed the test five times individually in 18 healthy adults(all males) volunteers. The recording electrodes were placed at 3 different positions(whole nasolabial fold(A), 2/3 portion of the nasolabial fold(B), 1/2 portion of the nasolabial fold(C)). And then we compared the results between action potentials of 3 different positions. The amplitude was more stable at B or C than A. The mean interside variance(ISV) of individuals was less than 50% except one case at A, and there was no significant difference among them(p>or=0.05) except two persons between A and C(p<0.05). In the test-retest variability, the mean was 20.03%(A20.66+/-10.72%, B23.75+/-12.60%, C15.69+/-10.21%). There was more smaller mean and standard deviation at C than others. So, we recommand the 1/2 of the nasolabial fold as the available position in the serial ENoG recordings.