Value Of The Function Examination Of Cochlear And Vestibular In Early Diagnosis Of The Patients With Vertebrobasilia Transient Ischemic Vertigo

Objective: To study the changes of videonystagmography (VNG) and otoacoustic emissions (OAE) in patients with vertebrobasilia transient ischemic vertigo (VBTIV), explore their clinical value in early diagnosis of the patients with VBTIV.Methods: 38 patients who complained vertigo and imbalance with VBTIV diagnosed by neurologist were selected as experimental group for testing of videonystagmography (VNG) and otoacoustic emissions (OAE). The former consisted of spontaneous nystagmus, visual-oculomotor system reaction, positional test, positioning test, cervical torsion test and caloric test. The latter included transient evoked otoacoustic emissions (TEOAE) and distortion products otoacoustic emissions (DPOAE). 20 normal persons were chosen as control group. The result was analyzed.Results: In the experimental group, there was one case that had spontaneous nystagmus and 29 cases (76.3%) with positional nystagmus. The positional nystagmus intension in those patients was 4.08±3.18 /s , which was much higher as compared with the control group ( P<0.01). The incidence was 38.6% for positioning test and 34.2% for cervical torsion test. One or more abnormal findings for visual-oculomotor system examination were shown in 28 patients (73.7%). These abnormal findings included saccade test in 26 cases (68.4%), eye tracking test type III in 13 cases and type IV in 3 cases in all 16 cases (42.1%), optokinetic nystagmus in 17 cases (44.7%). There was none with gaze nystagmus. Caloric test showed canal paresis in 19 cases (50%) and directional preponderance...