Korsager Leise Elisabeth Hviid, Faber Christian Emil, Schmidt Jesper Hvass, Wanscher Jens Højberg
Department of ENT Head and Neck Surgery, Odense University Hospital , Denmark.
Department of Audiology, Odense University Hospital , Denmark.
Front Neurol. 2017 Mar 14;8:81. doi: 10.3389/fneur.2017.00081. eCollection 2017.
Refixation saccades with normal gain value occur more frequently with increasing age. The phenomenon has also been observed in different vestibular disorders. In this case, we present a young male with normal gain value and refixation saccades tested with the video head impulse test (vHIT) the day after his cochlear implantation. One month after surgery, refixation saccades were no longer present. This suggests that refixation saccades can occur as a result of temporary pathology such as surgery. Refixation saccades with normal gain values might reflect a partial deficit in the vestibulo-ocular reflex. However, this partial deficit is in conflict with the current way of interpreting vHIT results in which the vestibular function is classified as either normal or pathological based only on the gain value. Refixation saccades, which are evident signs of vestibulopathy, are not considered in the evaluation. A new way of interpreting the vHIT based on the saccades must be considered.
随着年龄增长，具有正常增益值的重新注视扫视更为频繁。这种现象在不同的前庭疾病中也有观察到。在本病例中，我们报告一名年轻男性，在其人工耳蜗植入术后第二天，通过视频头脉冲试验（vHIT）检测发现其具有正常增益值和重新注视扫视。术后一个月，重新注视扫视不再出现。这表明重新注视扫视可能是由手术等暂时性病变引起的。具有正常增益值的重新注视扫视可能反映了前庭眼反射的部分缺陷。然而，这种部分缺陷与目前仅根据增益值将前庭功能分类为正常或病理性的vHIT结果解释方式相冲突。重新注视扫视是前庭病变的明显迹象，在评估中未被考虑。必须考虑一种基于扫视来解释vHIT的新方法。
