The analysis of the stria vascularis and the lateral wall of cochlea in the audiometric hearing loss animal model by the Arg-Vasopressin

1.动物模型研究在我们以前的研究中，已经证实了施用精氨酸加压素（AVP）的动物模型的听力受损。对AVP致耳蜗损伤动物模型的耳蜗外侧壁，特别是血管纹进行了形态学观察。Wistar大鼠腹腔注射AVP（0.02单位/g）。电镜观察AVP作用后1小时内血管纹的形态学变化。结果发现血管纹中间细胞内有细胞内水肿。推测AVP引起的听力损伤与中间细胞的形态学改变有关。认为细胞内水肿导致血管纹中的血液循环受损，氧分压降低，离子代谢受损。根据结果，假定听证会受到损害。临床研究。我们检查了是否有 ...更多信息 对梅尼埃病（MD）患者，常规治疗已证明不成功，但饮水对长期控制眩晕和听力活动有效。历史对照的时间序列研究。第1组58例MD患者饮水35 ml/kg/d，持续2年。29例MD患者在1992年至1999年期间在同一医院接受常规饮食和利尿剂治疗超过2年，被纳入第2组的历史对照。在研究的最后6个月，第1组患者的眩晕症状明显缓解，三个频率（0.125、0.25和0.5 kHz）（低PTA）的最差纯音平均听力显著改善。相比之下，第2组的患者在四个（0.5，1，2和4 kHz）频率PTA和低PTA中变得更糟，尽管他们的眩晕确实有所改善。听力改善、无变化和恶化的患者数量在组1和组2中分别为18、37和3例，在组2中分别为11和16例。有意识地调节水的摄入量可能是MD患者最简单和最具成本效益的医疗方法。需要更大规模的研究来证实这些结果。少

1. Animal model study.In our previous study, it was confirmed that the hearing of the animal modes administered Arg-Vasopressin (AVP) was impaired. The lateral wall of cochlea, especially the stria vascularis in the animal model administered AVP was investigated morphologically. Wistar rats were intra-peritoneally injected AVP (0.02 units/g). The morphology in the stria vascularis in one hour after the administering AVP was investigated in electron microscopy. As the results, an intra-cellar edema was found in the intermediate cell of the stria vascularis. It is assumed that the hearing impairment induced by AVP administering is related to the morphological change in the intermediate cells. It is considered that the intra-cellular edema induce that a blood circulation in the stria vascularis is impaired, the oxygen partial pressure is decreased and the ion-metabolism is impaired. As the results, it was assumed that the hearing was impaired.2. Clinical study.We examined whether sufficie … More nt water intake is effective in the long-term control of vertigo and hearing activity in patients with Meniere's disease (MD) for whom conventional therapy has proven unsuccessful. Time-series study with historical control. Fifty-eight patients with MD in Group 1 drank 35 ml/kg/day of water for 2 years. Twenty-nine patients with MD treated with the conventional dietary and diuretic therapy for more than 2 years during 1992-99 at the same Hospital were enrolled in a historical control of Group 2. Patients in Group 1 dramatically relieved vertigo and significantly improved in the hearing of the worst pure-tone average of three frequencies (0.125, 0.25, and 0.5 kHz) (low-PTA) during the last 6 months of the study period. In contrast, patients in Group 2 became worse in both the four (0.5, 1, 2, and 4 kHz) frequency-PTA and the low-PTA, although their vertigo did improve. The number of patients whose hearing were improved, unchanged and worse were 18, 37 and 3 in Group 1 and 2, 11 and 16 in Group 2, respectively. Deliberate modulation of the intake of water may be the simplest and most cost-effective medical treatment for patients with MD.Larger studies will be needed to confirm these results in a larger patient cohort. Less