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目的:探讨眼震电图对先天性眼震患者手术效果的评定及其临床意义。方法:对48例手术前后先天性眼震患者行眼震电图检测,中间位检查方法为令患者头正位注视正前方50cm处与双眼平行的目标光点;代偿位检查时令患者放松以平时视物最佳位为准,在此位患者眼震最小。观察中间位和代偿位眼震的速度、幅度和频率。眼震幅度、频率和速度计算均取最大眼震反应期10s时期内的平均值。结果:眼震电图可以记录到跳动型和钟摆型两种不同的眼震波,跳动型呈锯齿波,钟摆型呈正旋波。手术后中心位和代偿位的眼震与术前相比有明显降低。43例患者的眼震速度在中心位和代偿位有不同程度的下降或消失,占89.5%,48例患者中眼震幅度下降者42例,占83.3%。术后眼震频率在中心位和代偿位也均有下降,但以中心位明显。其中17例患者代偿位眼震的频率,幅度和速度降为零。术前中心位的眼震速度、幅度和频率分别为(29.64±18.22)mm/s,(8.52±3.36)mV,(9.88±1.21)Hz,术后分别下降为(12.87±9.24)mm/s(t=5.68,P<0.01),(3.54±2.12)mV(t=8.74,P<0.01),(2.86±1.83)Hz(t=21.93,P<0.01)。结论:眼震电图检查可以对先天性眼震患者手术效果进行客观有效的评定。
Objective: To investigate the effect of electronystagmography on the surgical outcome of patients with congenital nystagmus and its clinical significance. Methods: 48 cases of congenital nystagmus before and after surgery underwent electronystagmography, medial check method for the patient’s head to sit in front of 50cm at both eyes and eyes parallel to the target spot; compensatory position checks to make patients relax Usually the best subject as the subject, in this patient nystagmus minimum. Observe the median, and compensatory nystagmus speed, amplitude and frequency. The nystagmus amplitude, frequency, and velocity were averaged over the maximal nystagmus response period of 10 s. Results: Electronystagmography can record two different kinds of eye wave, beat type and pendulum type. The beat type shows sawtooth wave, and the pendulum type shows positive wave. Nystagmus of the central and compensatory position after surgery decreased significantly compared with preoperative. The nystagmus velocity of the 43 patients decreased or disappeared to some extent in the center and the compensatory position, accounting for 89.5%. Among the 48 patients, the nystagmus amplitude decreased in 42 cases (83.3%). Nystagmus frequency in the center and the compensatory position also decreased, but obvious to the center. Among them, the frequency, amplitude and velocity of nystagmus in 17 patients were reduced to zero. The nystagmus velocities, amplitudes and frequencies at the preoperative center were (29.64 ± 18.22) mm / s and (8.52 ± 3.36) mV and (9.88 ± 1.21) Hz, respectively, and were decreased to (12.87 ± 9.24) mm / s (t = 5.68, P <0.01), (3.54 ± 2.12) mV (t = 8.74, P <0.01) and (2.86 ± 1.83) Hz (t = 21.93, P <0.01). CONCLUSION: Electronystagmography can objectively and effectively evaluate the surgical effect of congenital nystagmus.