Correlation Analysis between Brain Tumors in Infratentorial Area and Brainstem Auditory Evoked Potential Indexes
Objective:To analyze the correlation between different infratentorial tumors and brainstem auditory evoked potential(BAEP)indexes,and to provide reference for clinical identification and preoperative diagnosis and evaluation of infratentorial tumors.Methods:The clinical data of 136 patients with infratentorial brain tumors were retrospectively analyzed.BAEP indexes were detected in patients with brain tumors in the infratentorial area before operation,and related neurophysiological indexes were recorded,including la-tency(PL),interpeak latency(IPL)and interpeak latency difference(ILD).The PL,IPL,ILD,abnormal rate of each wave,abnormal rate of BAEP index of different tumor diameters in different group were compared.Results:77 cases(95.06％)had bilateral BAEP abnormali-ties in VS group.25 cases(75.76％)had abnormal BAEP detection on both sides in meningioma group.18 cases(81.82％)had abnormal bilateral BAEP detection in mixed group.The PL of Ⅰ,Ⅲ and Ⅴ waves in VS group was longer than that in meningioma group,and the PL of Ⅰ,Ⅲ and Ⅴ waves in meningioma group was longer than that in mixed group(P＜0.05).Ⅴ-wave ILD of the affected side in VS group was longer than that in meningioma group,and the Ⅴ-wave ILD of the affected side in meningioma group was longer than that in mixed group(P＜0.05).The abnormal rate of PL of Ⅴ wave in VS group was higher than that in meningioma group,and meningioma group was higher than that of mixed group(P＜0.05).The abnormal rate of IPL of Ⅰ-Ⅴ wave in VS group was higher than that in meningioma group,and mixed group was higher than that of meningioma group(P＜0.05).The ILD of Ⅴ wave in different tumor diameters was statistically different(P＜0.05),and the ILD of Ⅴ wave increased with the increase of tumor diameter(P＜0.05).Conclusion:The Ⅰ wave,Ⅲ wave andⅤ wave PL of BAEP index have certain reference significance for the classification and identifiication of infratentorial tumors,especially the Ⅴ wave ILD value has a certain correlation with tumor diameter and type.
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