PDF(Pubmed)
Abstract：
UNASSIGNED: To investigate the potential influence of anatomical variation in the anterior inferior cerebellar artery (AICA) on the occurrence and severity of idiopathic sudden sensorineural hearing loss (ISSNHL).
UNASSIGNED: Ninety ISSNHL patients were enrolled. The anatomical location of the AICA was exhibited using high-resolution magnetic resonance imaging (MRI), and the various AICA types classified by previously reported Chavda and Gorrie methods were analyzed. The severity of hearing loss in the ipsilateral ear among different AICA types was compared.
UNASSIGNED: Approximately 85.6% of subjects had unilateral ISSNHL (uISSNHL), and the others had bilateral ISSNHL (bISSNHL). In the uISSNHL group, the ratios of different AICA types were similar between the ipsilateral and contralateral ears. The ratios of the different AICA types in the bISSNHL group were similar to those in the uISSNHL group. In the uISSNHL group, pure tone audiometry (PTA) thresholds at 2 kHz, 4 kHz and 8 kHz of patients with Chavda type II AICA were higher than those of patients with Chavda type I and type III, with a significant difference at 4 kHz between type I and type II. There was a tendency of the PTA threshold in patients with Chavda type II or Gorrie type C to gradually increase from low to high frequency zones.
UNASSIGNED: When the AICA enters the IAC (Chavda type II) or crosses between the 7th and 8th cranial nerves (Gorrie type C), the severity and frequency of hearing impairment in ISSNHL but not the occurrence of ISSNHL will be affected.
UNASSIGNED: Ninety ISSNHL patients were enrolled. The anatomical location of the AICA was exhibited using high-resolution magnetic resonance imaging (MRI), and the various AICA types classified by previously reported Chavda and Gorrie methods were analyzed. The severity of hearing loss in the ipsilateral ear among different AICA types was compared.
UNASSIGNED: Approximately 85.6% of subjects had unilateral ISSNHL (uISSNHL), and the others had bilateral ISSNHL (bISSNHL). In the uISSNHL group, the ratios of different AICA types were similar between the ipsilateral and contralateral ears. The ratios of the different AICA types in the bISSNHL group were similar to those in the uISSNHL group. In the uISSNHL group, pure tone audiometry (PTA) thresholds at 2 kHz, 4 kHz and 8 kHz of patients with Chavda type II AICA were higher than those of patients with Chavda type I and type III, with a significant difference at 4 kHz between type I and type II. There was a tendency of the PTA threshold in patients with Chavda type II or Gorrie type C to gradually increase from low to high frequency zones.
UNASSIGNED: When the AICA enters the IAC (Chavda type II) or crosses between the 7th and 8th cranial nerves (Gorrie type C), the severity and frequency of hearing impairment in ISSNHL but not the occurrence of ISSNHL will be affected.
摘要：
■研究小脑前下动脉（AICA）解剖变异对特发性突发性感觉神经性听力损失（ISSNHL）的发生和严重程度的潜在影响。
■纳入90例ISSNHL患者。使用高分辨率磁共振成像（MRI）显示AICA的解剖位置，并分析了以前报道的Chavda和Gorrie方法分类的各种AICA类型。比较了不同AICA类型中同侧耳听力损失的严重程度。
■大约85.6％的受试者患有单侧ISSNHL（uISSNHL），其他人有双侧ISSNHL（bISSNHL）。在uISSNHL组中，不同AICA类型的比例在同侧和对侧耳之间相似。bISSNHL组中不同AICA类型的比率与uISSNHL组中的比率相似。在uISSNHL组中，纯音测听（PTA）阈值在2kHz，ChavdaII型AICA患者的4kHz和8kHz高于ChavdaI型和III型患者，在4kHz时，I型和II型之间存在显着差异。ChavdaII型或GorrieC型患者的PTA阈值有从低频区到高频区逐渐增加的趋势。
■当AICA进入IAC（ChavdaII型）或穿过第7和第8颅神经（GorrieC型）时，会影响ISSNHL听力损伤的严重程度和频率,但不会影响ISSNHL的发生.
■纳入90例ISSNHL患者。使用高分辨率磁共振成像（MRI）显示AICA的解剖位置，并分析了以前报道的Chavda和Gorrie方法分类的各种AICA类型。比较了不同AICA类型中同侧耳听力损失的严重程度。
■大约85.6％的受试者患有单侧ISSNHL（uISSNHL），其他人有双侧ISSNHL（bISSNHL）。在uISSNHL组中，不同AICA类型的比例在同侧和对侧耳之间相似。bISSNHL组中不同AICA类型的比率与uISSNHL组中的比率相似。在uISSNHL组中，纯音测听（PTA）阈值在2kHz，ChavdaII型AICA患者的4kHz和8kHz高于ChavdaI型和III型患者，在4kHz时，I型和II型之间存在显着差异。ChavdaII型或GorrieC型患者的PTA阈值有从低频区到高频区逐渐增加的趋势。
■当AICA进入IAC（ChavdaII型）或穿过第7和第8颅神经（GorrieC型）时，会影响ISSNHL听力损伤的严重程度和频率,但不会影响ISSNHL的发生.
