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作者报道一左侧搏动性耳鸣8个月的病例。既往无外伤史;仰卧时症状加重。检查见双鼓膜下部深染。左乳突后上方近乳突缘处可闻中等响度的机械性杂音。电测听、脑干反应测听、头颅CT、颈内外动脉上段造影和锝~(99)RBC扫描均无异常。压迫颈内静脉或乳突时,耳鸣减轻。这一结果经多普勒超声检查已证实。左乳突导静脉结扎术中所见证实患侧导静脉粗大。术后,患者耳鸣显著减弱。作者观察了50个颅骨的乳突导静脉孔和髁导静脉孔。并为30例正常人做了耳后多普勒超声检查。结果表明:绝大多数颅骨有乳突导静脉。而位于横窦和乙状窦结合部的乙状窦上1/3部的导静脉孔有时孔径相当大,与上述患者情
The authors report a case of pulsatile tinnitus on the left for 8 months. No previous history of trauma; worse symptoms when supine. Check see the double tympanic membrane deep stained. Left mastoid above the mastoid margin can be heard at moderate loudness of mechanical noise. Electrical audiometry, brainstem response audiometry, cranial CT, internal and external carotid artery angiography and 99TcBCT were normal. Tinnitus is reduced when the internal jugular vein or mastoid is pressed. This result has been confirmed by Doppler ultrasound. Left mastoid venous ligation seen in the side of the ipsilateral venous thickening. After surgery, tinnitus patients significantly weakened. The authors looked at the mastoid papillary and condylar ostium holes in 50 skulls. And 30 cases of normal people made after ear Doppler ultrasound. The results show that most skulls have papillary veins. And located in the transverse sinus and sigmoid sinus sigmoid sinus on the 1/3 Department of the guide hole sometimes quite large aperture, and the patient situation