Vernon J A, Press L S
Oregon Hearing Research Center, Oregon Health Sciences University, Portland.
Arch Otolaryngol Head Neck Surg. 1994 May;120(5):547-51. doi: 10.1001/archotol.1994.01880290057010.
To determine if the characteristics of tinnitus produced by head trauma are specific and exclusive when compared with other origins of tinnitus.
Retrospective study using clinic test results and data from the Tinnitus Data Registry compiled from questionnaires, interviews, and testing. Tinnitus produced by head injury was compared with tinnitus of mixed origins, including no known origin.
A tinnitus referral clinic where all patients must see an otologist or an ear, nose, and throat physician prior to attending the clinic.
All patients had severe to moderately severe constant tinnitus and presented with tinnitus as the primary symptom.
No exclusive characteristics were found to describe head injury-induced tinnitus. The tinnitus for the group with head injury was statistically significantly (P = .004) louder and occurred with greater incidence of continuing pain in the ears. The group with head injury also had more episodes of dizziness and a more severe form of tinnitus. However, no marked difference was noted in pitch of tinnitus, complexity (number of sounds) of tinnitus, or the minimum masking level.
This retrospective study found that tinnitus induced by head injury was significantly (P = .004) louder than tinnitus induced from other causes but, interestingly, did not require higher levels of masking. The patients with head injury-induced tinnitus more frequently (P = .0003) displayed residual inhibition although the duration of residual inhibition was not different from that of the comparison group. Other symptoms associated with the tinnitus onset were more frequently mentioned by the group with head trauma-induced tinnitus, except for the condition of pressure sensation in the ears. Using a severity questionnaire, the group with head trauma-induced tinnitus rated their tinnitus as being more severe than did the comparison group. However, such things as pitch of the tinnitus, masking level, acceptance of wearable maskers, general hearing level, and complexity of the tinnitus did not distinguish the two groups.
确定头部外伤所致耳鸣的特征与其他耳鸣病因相比是否具有特异性和独特性。
采用回顾性研究，使用临床测试结果以及从问卷、访谈和测试中汇编的耳鸣数据登记处的数据。将头部损伤所致耳鸣与混合性病因的耳鸣进行比较，包括病因不明的耳鸣。
一家耳鸣转诊诊所，所有患者在就诊前必须先看耳科医生或耳鼻喉科医生。
所有患者均有重度至中度重度持续性耳鸣，并以耳鸣为主要症状。
未发现描述头部损伤所致耳鸣的独特特征。头部损伤组的耳鸣在统计学上显著更响（P = 0.004），且耳部持续疼痛的发生率更高。头部损伤组还出现更多头晕发作且耳鸣形式更严重。然而，在耳鸣音调、耳鸣复杂性（声音数量）或最小掩蔽水平方面未发现明显差异。
这项回顾性研究发现，头部损伤所致耳鸣比其他原因所致耳鸣显著更响（P = 0.004），但有趣的是，其掩蔽水平并不更高。头部损伤所致耳鸣的患者更频繁地表现出残余抑制（P = 0.0003），尽管残余抑制的持续时间与对照组无差异。除耳部压迫感情况外，头部外伤所致耳鸣组更频繁地提及与耳鸣发作相关的其他症状。使用严重程度问卷，头部外伤所致耳鸣组对其耳鸣的评分比对照组更高。然而，耳鸣音调、掩蔽水平、可佩戴掩蔽器的接受程度、一般听力水平和耳鸣复杂性等方面并不能区分两组。
