Department of Otolaryngology-Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
J Vestib Res. 2011;21(5):289-95. doi: 10.3233/VES-2011-0429.
To evaluate vestibular function after unilateral acoustic neuroma surgery via a retrosigmoid approach.
Thirty-eight patients were tested using caloric irrigation, static posturography, and the Dizziness Handicap Inventory (DHI) before, and one week to nine months after surgery.
Twenty-six patients were categorized as a response group and 12 as a no-response group on the basis of preoperative caloric irrigation findings. The posturographic parameters and DHI scores at one week after surgery showed significant deterioration in the response group, but not in the no-response group. However, they recovered to the preoperative baseline at 3 months after surgery. The posturographic parameters and DHI scores for older patients tended to be worse than those for younger patients at 6 and 9 months after surgery.
Patients in whom caloric responses are retained preoperatively show a temporary disturbance of balance after removal of acoustic neuroma. Disequilibrium after surgery ameliorates to the preoperative baseline within three months due to vestibular compensation, regardless of preoperative vestibular function. It is possible that poorer vestibular compensation may facilitate incomplete recovery in older patients after surgery.
通过乙状窦后入路评估单侧听神经瘤手术后的前庭功能。
38 例患者在术前、术后 1 周至 9 个月分别接受冷热激发试验、静态姿势描记术和眩晕障碍量表（DHI）检查。
根据术前冷热激发试验结果，26 例患者被归类为有反应组，12 例为无反应组。术后 1 周，有反应组的平衡姿势描记术参数和 DHI 评分明显恶化，但无反应组无此表现。然而，术后 3 个月，这些参数和评分恢复至术前基线水平。术后 6 个月和 9 个月，老年患者的平衡姿势描记术参数和 DHI 评分比年轻患者更差。
术前保留冷热反应的患者在听神经瘤切除术后会出现短暂的平衡障碍。由于前庭代偿，术后 3 个月内，无论术前前庭功能如何，失衡均会恢复至术前基线水平。术后，较差的前庭代偿可能导致老年患者恢复不完全。
