METHODS: Retrospective study over 5 years, with 78 adult patients implanted with MED-EL in a tertiary hospital from the year 2000 to 2015. The variation in impedance, MCL and the relationship between them were analyzed in basal (9-12), medial (5-8) and apical electrodes (1-4), performing an inferential ANOVA analysis of repeated measures with comparisons between consecutive times, corrected with Bonferroni criteria.
RESULTS: 33 men (42.3%) and 45 women (57.7%), with a mean age of 52.7±14.6 years. \"Stability\" was considered the time of follow-up without statistically significant differences between one visit and the next. Changes in impedance in medial electrodes ceased to be statistically significant at 3 months, and in apicals at 6 months, with mean values of 5.84 and 6.43kΩ. MCL stabilized at 2 years in basal and apical electrodes, and at 3 years in medial, with mean values of 24.9, 22.7, and 25.6qu. There was a correlation between MCL and impedance in medium electrodes up to 3 months and in apical ones up to one year.
CONCLUSIONS: Electrical impedance drops significantly in medial and apical electrodes up to 3 and 6 months. MCL increases significantly up to two years. Impedance is related to MCL up to 6 months.
方法:超过5年的回顾性研究,从2000年到2015年,78名成人患者在三级医院植入了MED-EL。阻抗的变化,在基础(9-12)中分析MCL及其之间的关系,内侧(5-8)和心尖电极(1-4),用连续时间之间的比较对重复测量进行推理方差分析,用Bonferroni标准校正。
结果:33名男性(42.3%)和45名女性(57.7%),平均年龄52.7±14.6岁。“稳定性”被认为是随访时间,一次访视与下一次访视之间无统计学差异。中间电极阻抗的变化在3个月时不再具有统计学意义,在六个月的顶点,平均值为5.84和6.43kΩ。MCL在基底和根尖电极中稳定在2年,在3年的中间,平均值分别为24.9、22.7和25.6。在长达3个月的中等电极和长达1年的顶部电极中,MCL与阻抗之间存在相关性。
结论:在3个月和6个月内,内侧和心尖电极的电阻抗显著下降。MCL显著增加长达两年。阻抗与MCL相关长达6个月。