ĐÁNH GIÁ CHỨC NĂNG TIỀN ĐÌNH BẰNG NGHIỆM PHÁP NHIỆT TRONG BỆNH U THẦN KINH THÍNH GIÁC

Abstract

Objectives: To evaluate the vestibular function in patients with acoustic neuromas by caloric test. Patients and methods: A cross-sectional study was conducted on 50 patients (19 men and 31 women, aged 16 to 71 years), who were diagnosed with acoustic neuromas (48 patients with unilateral tumors and 2 patients with tumor on both sides), and were assessed their vestibular function by caloric test with warm water (44°C) and cold water (30°C). Results: The response rate of the ears with tumors to warm water was 5.8% (3 of 52 ears), with cold water was 11.5% (6 of 52 ears), lower than that of the ears without tumors were 85.4% (41/48 ears) and 95.8% (46/48 ears), respectively (p <0.001). Unilateral weakness accounted for 88% (44 of 50 patients) in all patients with unilateral tumors. In contrast, the two patients with bilateral tumors did not exhibit unilateral weakness. The proportion of patients with unilateral weakness over 22% was 90% (9 of 10 patients) in the medium tumor group, in the large tumor group was 86.7% (13 of 15 patients), and 88.0% (22 of 25 patients) in giant tumors group (p=0.746). Conclusions: The majority of patients with acoustic neuromas had their vestibular function decreased and lost at a very low frequency, regardless of tumor size.