A Clinical Study Of Facial Nerve Function Reservation And Post-operation Evaluation Acoustic Neuroma

ObjectiveThis essay analyzes influential factors related to facial nerve function reservation byway of resecting AN via suboccipital retrosigmoid craniotomy and provides evidence forthe treatment of AN resection and holistic reservation of facial nerve function accordingly.MethodologyThis essay reviewed previous studies of43patients who underwent resection of ANvia suboccipital retrosigmoid craniotomy. The following factors were taken intoconsideration including tumor size, degree of tumor resection, tumor staging, whethertumor cystic degeneration exists, the age of patients and the monitoring of facial nerve inthe process of operation and so on. All the cases were evaluated based on House-Brackmann facial nerve function classification standard established by American Academyof otolaryngology and head&neck surgery preoperatively and postoperatively in a followup of2weeks,3months, and6months. Kruskal-Wallis rank-sum test of ordinal variableswas conducted on all influential factors except monitoring of facial nerve in the process ofoperation. Statistical differential analysis concerning the influence of tumor size, degree oftumor resection, tumor staging, whether tumor cystic degeneration exists, the age ofpatients was conducted on postoperative facial nerve reservation. Chi-square test wasconducted on two groups of patients according to whether they were monitored or not.ResultOf the43cases,35underwent total surgery,6subtotal surgery and2greater partresection. There were39cases (accounting for90.7%) with reservation of facial nervefunction after surgery. In the evaluation of reservation of facial nerve function based onHouse-Brackmann Scale and using Kruskal-Wallis rank-sum test and Chi-square test, itwas found that the influence of tumor size (P=0.037), degree of tumor resection (P=0.007),whether tumor cystic degeneration exists (P=0.021), the age of patients (P=0.012) and monitoring in the process of operation on recovery of facial nerve function (P=0.023) wasstatistically significant (P<0.05) while the influence of tumor staging on recovery of facialnerve function was statistically insignificant (P=0.365, P>0.05).ConclusionIt is concluded that tumor size, degree of tumor resection, whether tumor cysticdegeneration exists, the age of patients and monitoring in the process of operation havesignificant influence on post-operative reservation and recovery of facial nerve functionwhile tumor staging no significant influence.