Evaluation Criteria, Diagnostic Criteria, Surgical Indications, and Establishment of Surgical Standards for "Cerebral Tinnitus Syndrome" Caused by Internal Jugular Vein Stenosis.

Inclusion Criteria: 1. Age between 18 and 75 years, with no gender restriction. 2. Presence of one or more symptoms associated with "Cerebral Tinnitus Syndrome," with a duration of at least 3 months. 3. Following a detailed medical history and comprehensive physical examination, other known causes of cerebral tinnitus are preliminarily excluded, with suspected internal jugular vein stenosis (IJVS) as the cause. 4. Imaging studies (e.g., jugular ultrasound, cervical venous CT venography (CTV)) show significant stenosis in the internal jugular vein (stenosis degree ≥50%). 5. The patient has provided informed consent and voluntarily agrees to participate in the study, with a signed informed consent form. Exclusion Criteria: 1. Patients with a history of cranial surgery or diagnosed intracranial space-occupying lesions. 2. Patients with severe cardiac, hepatic, or renal insufficiency, or other systemic diseases. 3. Patients who have undergone any surgical or interventional procedures affecting jugular venous flow within the last 6 months. 4. Patients with a history of psychiatric disorders or cognitive impairment who cannot complete study evaluations. 5. Pregnant or breastfeeding women.