脑梗死患者体感及脑干听觉诱发电位的研究

目的 研究脑梗死后患者的体感诱发电位（SEP）及脑干听觉诱发电位（BAEP）变化。方法 对50例此类疾病患者进行SEP检查。其中36例行BAEP检查。结果 SEP异常率为72％,BAEP异常率为47％,患者SEP异常和病灶及体积关系密切,而BASP则与病灶体积有关,SEP及BAEP均随病情发生改变。结论 SEP及BAEP检查可在一定程度上反映脑梗死患者大脑及脑干的功能,并对此类疾病患者病情和预后的判断有一定价值。     

老年人听觉脑干诱发电位和短潜时体感诱发电位...

同时记录了30名健康老年人(60～83岁)的听觉脑干诱发电位(BAEP)和短潜时体感诱发电位(SSEP)发现:BAEP的Ⅰ波峰潜时,Ⅰ～Ⅲ,Ⅲ～Ⅴ峰间传导时间及SSEP的NCV、N_(20)-N_9-W、W值,在部分健康老年人可出现明显延长。Ⅰ～Ⅲ、Ⅲ～Ⅴ峰间传导时间、N_(20)-N_9-W值与W值的延长无同步关系。显示了中枢神经系统老化与实际年龄的不一致性和中枢神经系统各部老化程度的不一致性。     

脑性瘫痪病人的脑干听觉诱发电位及体感诱发电位观察与分析

脑性瘫痪(脑瘫)是小儿神经系统常见的一种疾病.我国发病率为1.8‰～6‰[1].早期发现、及时治疗,对提高康复率有重要意义.本文作者对1995～1997年临床确诊为"脑瘫"的52例患者进行了脑干听觉诱发电位(BAEP),躯体感觉诱发电位(SEP)两项检查的对比研究,现报道如下.     

脑干听觉和体感诱发电位在脑干肿瘤手术监护中的联合应用

脑干听觉诱发电位（BAEP）常用于术中监护听觉和脑干功能，体感诱发电位（SEP）亦可监护神经传导通路，但两者合用对脑干功能监护作用的研究不多。我们对41例脑干肿瘤患者的BAEP、SEP监护资料进行分析，试图阐明两者合用的价值。     

脑干听觉诱发电位及短潜伏期体感诱发电位与影像学检查在老年腔隙性脑梗死脑干功能检测的临床对比分析

腔隙性脑梗死（lacunar infarction,LI）是老年人常见多发疾病,随着年龄的增高,发病率不断上升。脑干听觉诱发电位（brainstem auditory evoked potential,SAEP）和短潜伏期体感诱发电位（short lmeney somatosensory evoked potential,SSEP）常用于神经外科手术监测神经功能状态的评估中。尽管近年来有将BAEP、SSEP应用于脑血管病的脑干及外周神经功能状态的评测,但对于老年人群LI的脑干功能状态的评测鲜为报道。     

脑干听觉诱发电位与体感诱发电位在昏迷患者促醒中的意义

利用有效方式,全面缩短昏迷患者清醒时间意义重大。脑干听觉诱发电位一般被用于评价患者的脑干功能,其在患者脑干出现轻度损伤时即可发生改变。而体感诱发电位则可以体现出患者大脑半球功能、丘脑功能改变情况,经感觉系统实施系列性生理传导,能够积极展现患者受损神经功能情况。对于昏迷患者实施脑干听觉诱发电位联合体感诱发电位检测,不仅能够积极评估患者疾病预后,还有助于指导实施针对性治疗。     

BAEP和SSEP监测重型脑血管病患者脑干功能的研究

目的 研究急性重型脑血管病的脑干听觉诱发电位(BAEP)和短潜伏期体感诱发电位(SSEP) 方法 选择30例急性重型脑血管病患者及60名正常对照组，应用丹麦仪器完成BAEP和SSEP检查，分别在发病后10h．2、5、7、10及30d观察脑干功能，并与临床表现和影像学检查相比较。结果 发病后10h，2、5、7、10及30d时，BAEP和SSEP发现的脑干损害均明显早于临床表现和影像学检查；结论 BAEP和SSEP在检测重型脑血管病病人脑干功能方面具有定量评价作用并与临床表现和影像学检查相比，BAEP和SSEP能更好地反映重型脑血管病病人的脑干功能情况。     

多种诱发电位评估急性昏迷病人的预后

目的 研究诱发电位对急性期昏迷病人预后的价值。方法 180例患者在昏迷后第1、3、7、10天进行脑干反射检查、GCS评分和多种诱发电位检测。结果 在昏迷第1天GCS和脑干反射无预测价值,在第1、3、7、10天GCS和脑干反射的预后准确率均低于90％,各种诱发电位的预后准确率均高于93％。结论 体感和听觉诱发电位结合对昏迷患者预后的准确率高于GCS和脑干反射。     

兔急性颅内高压模型中体感诱发电位与听觉诱发电位的变化

目的 :探索颅内压 (ICP)升高过程中体感诱发电位 (SEPs)与脑干听觉诱发电位 (BAEPs)的变化规律。方法 :采用幕上不同部位放置球囊引起急性ICP增高的动物模型。将新西兰兔 30只分为 3组 :A组动物球囊置入右顶部硬膜下 ;B组动物球囊置入右颞底 ,C组以上部位动物各半 ,球囊内不注水。结果 :(1)A组SEPsP1波幅在ICP升至(1.48± 0 .35 )kPa即发生显著变化 ,而B组中ICP达 (8.10± 1.2 5 )kPa才出现波幅显著压缩。A组BAEPs在ICP升至(9.40± 1.6 0 )kPa时才出现IV ,V ,VII波的PL延长 ,而B组在ICP为 (3.11± 0 .80 )kPa时即见III波PL显著延长。 (2 )随ICP增高 ,P1波幅先随之升高 ,继而转为下降。结论 :SEPs与BAEPs的变化不仅受ICP高低的影响 ,还与病变的部位有关 ;SEPsP1波幅在ICP增高过程中呈先升后降的趋势     

帕金森病患者脑干听觉诱发电位与视觉诱发电位测定

目的:研究帕金森病(PD)患者是否存在脑干听觉传导通路与视觉传导通路的损害.方法:应用意大利产Reporter型-4通道诱发电位仪对PD患者(男20例,女12例)、非帕金森病患者(对照组,男19例,女11例)进行脑干听觉诱发电位(BAEP:Ⅰ、Ⅲ、Ⅴ峰潜伏期(PL)及Ⅰ-Ⅲ、Ⅲ-Ⅴ、Ⅰ-Ⅴ峰间潜伏期(IPL))、视觉诱发电位(VEP:P100 PL)检测.结果:PD患者BAEP异常率为50%,其中Ⅲ PL异常率为22%,Ⅴ PL异常率为19%;Ⅲ PL为(3.87±0.30)ms,Ⅴ PL为(5.79±0.30)ms.Ⅲ-Ⅴ＞Ⅰ-Ⅲ为31%;与对照组比较(Ⅲ PL(3.56±0.22)ms,Ⅴ PL(5.48±0.26)ms)差异有统计学意义(t=5.83,5.85;P＜0.01).PD患者P100 PL为(105.17±12.42)ms,对照组为(98.62±9.46)ms,2者相比差异有统计学意义(t=2.49,P＜0.05).结论:帕金森病患者除存在黑质-纹状体病变外,可能还存在脑干听觉传导通路与视觉传导通路的损害;听觉诱发电位与视觉诱发电位可作为临床评价帕金森病的客观指标.     

急性脑梗塞的CT与BAEP、SEP的对比研究

目的：了解急性脑梗塞的ＣＴ、ＢＡＥＰ和ＳＥＰ的变化。方法：５０例发病７ｄ以内的急性脑梗塞患者和３０例正常健康人进行ＣＴ、ＢＡＥＰ和ＳＥＰ检查。结果：急性脑梗塞患者ＣＴ、ＢＡＥＰ和ＳＥＰ异常率分别为７０％、８２％和８６％。结论：三项检查联合应用,可大大提高急性脑梗塞的诊断率。     

68例椎基底动脉供血不足瞬目反射和脑干听觉诱发电位与经颅多普勒的相关性

目的 探讨椎基动脉供血不足（ＶＢＩ）脑干功能与经颅多普勒（ＴＣＤ）的相关性。方法 对６８例临床诊断ＶＢＩ的患者及３０例非ＶＢＩ患者进行ＢＲ、ＢＡＥＰ和ＴＣＤ检测。结果 ＶＢＩ组脑干功能损害８４．６％，ＴＣＤ异常率为８３．１％，χ＾２检验差异不显著；非ＶＢＩ组脑干功能损害８．３％，ＴＣＤ异率为４６．６％，χ＾２检验差异显著。ＶＢＩ组脑干功能损害及ＴＣＤ异常者为９８／１３６，皆正常者为２４／１３６，两     

围产期缺氧对早产儿脑干功能的影响

目的用最大长度序列(MLS)脑干听觉诱发电位技术检测有围产期缺氧早产儿生后早期的脑干功能,研究不同程度缺氧对脑干功能的影响,并比较MLS脑干听觉诱发电位是否较常规法对异常的检出具有优越性。方法胎龄29~33+6周的早产儿,重度缺氧组51例,轻度缺氧组36例,对照组为相对正常早产儿41例。MLS脑干诱发电位的声刺激速率为91、227和455次/秒,选常规法21次/秒作为对照,观察指标为Ⅰ、Ⅲ、Ⅴ波潜伏期和振幅,Ⅰ-Ⅲ、Ⅲ-Ⅴ、Ⅰ-Ⅴ峰间期。结果随着缺氧程度加重,缺氧组早产儿V波潜伏期、Ⅲ-Ⅴ和Ⅰ-Ⅴ峰间期较正常对照组逐渐延长,V波振幅逐渐降低;通过MLS提高刺激速率后,缺氧早产儿Ⅲ波的潜伏期、Ⅰ-Ⅲ峰间期也表现出明显延长,Ⅲ波振幅也逐渐降低,并且随刺激速率逐渐增高,统计学差异逐渐明显。轻度缺氧组常规21次/秒时各参数与正常早产儿组无明显差异,但在MLS227及455次/秒时,Ⅲ、Ⅴ波潜伏期,各个峰间期也显示出延长[455次/秒时,轻度缺氧组Ⅲ波潜伏期为(6.55±0.53)ms,Ⅴ波潜伏期为(10.13±0.86)ms,Ⅰ-Ⅲ峰间期为(3.60±0.34)ms,Ⅲ-Ⅴ峰间期为(3.58±0.57)ms,Ⅰ-Ⅴ峰间期为(7.18±0.73)ms],同时部分振幅降低;重度缺氧组与轻度缺氧组的差异主要为Ⅴ波潜伏期、Ⅲ-Ⅴ和Ⅰ-Ⅴ峰间期延长及Ⅴ波振幅降低,而与正常早产儿组比较不仅上述差异更加显著,同时Ⅲ波的潜伏期及振幅、Ⅰ-Ⅲ峰间期也都显示出异常[455次/秒时,重度缺氧组Ⅴ波潜伏期为(10.57±0.93)ms,Ⅲ-Ⅴ峰间期为(3.93±0.53)ms,Ⅰ-Ⅴ峰间期为(7.60±0.73)ms,Ⅴ波振幅为(0.02±0.02)μV]。结论围产期缺氧会对早产儿生后早期的脑干功能造成损伤,且随缺氧程度加重诱发电位的变化也更加明显。MLS脑干听觉诱发电位通过提高刺激速率,加大神经元负荷,对脑损伤有更高的诊断价值。     

Combined monitoring of evoked potentials during microsurgery for lesions adjacent to the brainstem and intracranial aneurysms

Background Neurophysiologic monitoring during surgery is to prevent permanent neurological injury resulting from surgical manipulation. To improve the accuracy and sensitivity of intraoperative neuromonitoring, combined monitoring of transcranial electrical stimulation motor evoked potentials (TES-MEPs), somatosensory evoked potentials (SSEPs) and brainstem auditory evoked potentials (BAEPs) was attempted in microsurgery for lesions adjacent to the brainstem and intracranial aneurysms.Methods Monitoring of combined TES-MEPs with SSEPs was attempted in 68 consecutive patients with lesions adjacent to the brainstem as well as intracranial aneurysms. Among them, 31 patients (31 operations, 28 of posterior cranial fossa tumors, 3 of posterior circulation aneurysms) were also subjected to monitoring of BAEPs. The correlation of monitoring results and clinical outcome was studied prospectively.Results Combined monitoring of evoked potentials (EPs) was done in 64 (94.1％) of the 68 patients. MEPs monitoring was impossible for 4 patients (5.9%). No complication was observed during the combined monitoring in all the patients. In 45 (66.2%) of the 68 patients, EPs were stable, and they were neurologically intact. Motor dysfunction was detected by MEPs in 8 patients, SSEPs in 5, and BAEPs in 4, respectively. Conclusions A close relationship exists between postoperative motor function and the results of TES-MEPs monitoring. TES-MEPs are superior to SSEPs and BAEPs in detecting motor dysfunction, but combined EPs serve as a safe, effective and invasive method for intraoperative monitoring of the function of the motor nervous system. Monitoring of combined EPs during microsurgery for lesions adjacent to the brainstem and intracranial aneurysms may detect potentially hazardous maneuvers and improve the safety of subsequent procedures.     

健康人体感诱发电位正常参考值研究

对120例健康人进行体感诱发电位(SEP)检测。按不同性别、年龄分为成年组(30～59岁)及老年组(60～79岁)。结果表明,SEP各波潜伏期(PL)及波峰问期(1PL)的平均值左、右侧比较无统计学差异,但男、女组间,成年组与老年组间却有明显差异。Erb点电位(N_9)及颈髓电位(N_(13))的PL与臂长、身高呈正相关,有非常显著性意义。因此,临床判断病人的SEP值时,应考虑性别、年龄、臂长。身高等因素的影响,并注意选取正常值范围的界限,才能提高其诊断准确率。     

The effect of lead on brainstem auditory evoked potentials in children

Objective To determine whether lead affects brainstem auditory evoked potentials (BAEPs) in low-to-moderate lead exposed children. Methods BAEPs were recorded from 114 asymptomatic children aged 1-6 years. Average values were calculated for peak latency (PL) and amplitude (Amp). Whole blood lead (PbB) levels were assessed by graphite furnace atomic absorption spectroscopy. Based on their PbB levels, subjects were divided into low lead (PbB<100 μg/L) and high lead subgroups (PbB ≥100 μg/L). Results The PbB levels of the 114 subjects ranged from 32.0 to 380.0 μg/L in a positively skewed distribution. The median of PbB levels was 90.0 μg/L while the arithmetic average was 88.0 μg/L. Of the subjects, 43.0% (49/114) had levels equal to or greater than 100 μg/L. Bilateral PLs Ⅰ, Ⅴ, and Ⅲ of the left ear in the high lead subgroup were significantly longer than those in the low lead subgroup (P<0.05). A positive correlation was found between PbB levels and bilateral PLs Ⅰ, Ⅴ and Ⅲ of the left ear (P<0.05), after controlling for age and gender as confounding factors. A significant and positive correlation between PbB levels and PL Ⅰ of the left ear, even when PbB levels were lower than 100 μg/L, in the low subgroup (r=0.295, P=0.019) was also found.Conclusions Lead poisoning in children younger than 6 years old is a very serious problem to which close attention should be paid. The indications that lead prolongs partial PLs may imply that lead, even at PbB levels lower than 100 μg/L, impairs both the peripheral and the central portions of the auditory system. BAEPs may be a sensitive detector of subclinical lead exposure effects on the nervous system in children.