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1.
本文采用德国EMETC—2000S型TCD诊断仪检测了32例椎—基底动脉缺血性眩晕患者与健康人作对照,结果发现椎—基底缺血性眩晕患者TCD异常率达84.3%,主要表现为椎—基底动脉血流速度减慢为主,提示用TCD检测本病可为临床诊断提供较为客观的参考依据。  相似文献   

2.
本文采用配对设计研究方法,对41例椎动脉型颈椎病(CSA)住院患者进行经颅多普勒超声(TCD)检测分析。结果发现CSA组,TCD检测异常率为68.29%,统计学处理,其椎动脉及基底动脉的收缩期峰值血流速度及平均血流速度均较正常对照组显著减慢(P<0.01~0.001)。这证实CSA患者存在椎基底动脉供血不足,亦表明TCD检测能够为CSA的诊断提供血流动力学变化的客观依据。本文还发现,CSA组TCD检测正常者转头状态下TCD频谱显示有椎基底动脉供血不足改变,这表明转头可使其椎动脉的刺激和压迫加重,提示对CSA患者尚需考虑不同头位的TCD检测。部分CSA患者的TCD检测,其椎动脉和基底动脉呈动脉硬化性改变,但统计学处理其血管搏动指数与正常对照组比较无显著性差异(P>0.05),提示TCD检测尚不能代替临床血压,血脂,眼底动脉及心电图等检查指标。  相似文献   

3.
眩晕多系椎-基底动脉缺血所致。为探讨针刺对由于椎-基底动脉缺血引起眩晕的有效穴位,笔者采用颈椎夹脊的针刺治疗方法,并以经颅多普勒(TCD)超声脑血流测定仪观察其对椎-基底动脉血流速度的影响。1资料与方法 本组32例患者符合潘之清主编《实用脊柱病学》中椎动脉型颈椎病的诊断标准[1] 。其中男7例,女25例;年龄50~78岁12例,30~49岁18例,30岁以下2例。病人在针刺前停用复方丹参、西比宁、维脑路通、脑活素等影响脑代谢及脑血流量的药物1周以上。方法:TCD检查:病人在针刺前均使用美国3FTD…  相似文献   

4.
经颅多普勒超声检测分析椎底动脉供血不足(附540例报告)   总被引:1,自引:0,他引:1  
目的观察应用TCD检测椎-基底动脉供血不足病人颅血流动力学变化的意义。方法仪器为美国MedasonicsTCD仪,探头频率2MHz,对540例椎-基底动脉供血不足病人按年龄设置3组进行检测。结果TCD总异常率为78.7%,流速异常率为VA41.2%、BA35.2%、ICA31.9%。其中,高血压、动脉硬化和颈椎病TCD异常率分别为94.0%、89.4%和80。0%。全组频谱形态异常率为47.6%,年龄越大,异常率越高。结论TCD对研究椎-基底动脉供血不足血流动力学变化有较大意义。  相似文献   

5.
本文采用德国EMETC-2000S型TCD诊断仪检测了32例椎-基底动脉血性眩晕患者与健康人作对照,结果发现椎-基底缺血性眩晕患者TCD异常率达84.3%,主要表现为椎-基底动脉血流减慢为主,提示用TCD检测本病可为临床诊断提供较为客观的参考依据。  相似文献   

6.
经颅多普勒超声对椎-基底动脉系统供血的观察   总被引:2,自引:0,他引:2  
本文随机选择720例病人进行TCD检测,以观察椎-基底动脉系统供血的情况。全组TCD总异常率为82.1%,其中高血压、心脏病、颈椎病TCD异常率分别为96.1%、94.8%、87.6%。年龄越大,异常率越高。全组血流速度异常率:VA36.3%、BA36.7%。频谱形态异常率:38.4%。尽管病种不同,但各病种间VA、BA血流速度升高或降低值均相近,无明显统计学差异。TCD检测V-BA系统血流动力学变化是一种灵敏、有效的检查方法。  相似文献   

7.
血液流变学对腔隙性脑梗塞脑血流的影响   总被引:15,自引:0,他引:15  
研究血液流变学对腔隙性脑梗塞脑血流动力学及脑血流量(CBF)的影响;随机选择58例患者同时检查血液流变学、TCD及133Xe吸入法测定CBF;结果血液流变学异常24例,正常24例,异常组脑动脉平均血流速度(Vm)及CBF显著低于正常组,P<0.05~0.01;切变率分别为200s-1、10s-1时全血比粘度及血浆比粘度与大脑中动脉平均血流速度呈负相关,r=-0.87、-0.92、-0.83,P<0,01。相应局部脑血流量(rCBF)与Vm呈良好的一致性。故认为高粘血症使腔隙性脑梗塞患者脑血流速度下降,脑血流量减少。  相似文献   

8.
TCD与~(133)Xe吸入法测定脑梗塞患者脑血流量的对比研究   总被引:4,自引:1,他引:3  
为研究TCD评估脑梗塞患者脑血流量的价值;选择95例发病1周内,头颅CT证实的单发病灶脑梗塞患者同时做TCD及133Xe吸入法脑血流量测定;结果发现脑梗塞TCD表现主要为病灶区血管血流速度降低,与局部脑血流量(rCBF)下降呈正相关,r=0.88;或表现为病灶同侧颞窗无信号,或血流速度增加。脑梗塞灶大则TCD、rCBF异常率高。故认为TCD可作为评价脑血流量的有效手段,对中、大灶梗塞患者意义更大。  相似文献   

9.
TCD与^133X吸入法测定脑梗塞患者脑血流量的对比研究   总被引:22,自引:1,他引:21  
为研究TCD评估脑梗塞患者脑血流量的价值;选择95例发病1周内,头颅CT证实的单发症灶脑梗塞患者同时做TCD及^133Xe吸入法脑血流量测定;结果发现脑梗塞TCD表现主要为病灶区血管血流速度降低,与局部脑流量下降呈正相关,r=0.88;或表现为病灶同侧颞窗无信号,或血流速度增加。  相似文献   

10.
本文对33例临床确诊为真性眩晕患者采用经颅多普勒检测技术(Transcranial Dopple简称TCD)测定其颅内动脉颈内系统及椎基系统主要动脉血流速度,以观察真性眩晕患者颅内动脉功能状态及血流分布情况,初步探讨TCD对眩晕的诊断价值。结果:2例为正常TCD,31例为异常TCD改变。颈内系统与椎基系统相比较,以椎基系统血流速度减慢为主,亦好供血不足为主。颈内动脉系统则以血流速度增快为主。表明:  相似文献   

11.
脑外伤患者99Tcm-ECD SPECT显像的影像特征和应用价值   总被引:5,自引:1,他引:4  
目的 探讨99Tcm 双胱乙酯 (ECD)SPECT局部脑血流显像在各类脑外伤的影像特征和应用价值。方法 正常对照组 10例 ,脑外伤组 2 4例。病员准备、采集条件和图像处理基本同常规脑血流灌注断层显像。所有患者均进行同期CT扫描。结果  2 4例脑外伤患者中 2 0例SPECT表现为异常 ,病灶累及脑的部位 71个 ,阳性率 83 % ,CT阳性率为 71%。SPECT发现病灶范围和数目均高于CT。各类脑外伤SPECT除表现为局限性放射性稀疏或缺损的共同特点外 ,不同类型脑外伤还具有各自相应的影像特征 ,如脑挫裂伤表现为假性结构紊乱 ;脑血肿清除术后表现为原血肿区缺损 ,酷似脑梗塞改变。结论 各类脑外伤患者SPECT脑灌注显像具有相应的影像特征 ,该显像具有重要临床价值。  相似文献   

12.
用SPM分析焦虑症患者99mTc-ECD局部脑血流变化   总被引:5,自引:0,他引:5  
目的:用统计参数地图(statistical parametric mapping,SPM)软件包分析焦虑症患者局部脑血流(regional cerebral blood,flow,rCBF)灌注的变化。方法:选择经CCMD-2或ICD-10诊断为焦虑症患者19例,进行脑^99mTc-ECD显像,并与23例年龄匹配的健康人作比较。用SPM软件包对脑血流图像进行组间比较,分析焦虑症患者大脑血流变化情况。结果:焦虑症患者的局部脑血流双侧颞叶,额上回,扣带回明显降低。而在中央前回,额叶眶部,左基底节血流明显升高。结论:焦虑症患者的局部脑血流有明显的变化,且与其发病机理相关。  相似文献   

13.
目的探讨多层螺旋CT脑灌注成像在急性脑缺血中的应用价值。方法应用GE lightspeed 16层螺旋CT扫描机,对经证实的16例急性脑缺血患者先行CT平扫,选定感兴趣区行多层螺旋CT脑灌注成像,经灌注软件处理,计算出局部血容量图(rCBV)、局部血流量图(rCBF)、对比剂平均通过时间(MTT)、对比剂峰值时间(TP),并与对侧相应脑组织灌注参数进行比较。所有病例均经CT随访或经MRI证实,所有病例联合头颈部CTA扫描。结果16例患者中15例其脑缺血侧rCBF减低,MTT、TP延长,rCBV正常或轻度降低,存在半暗区;4例患者rCBV未显示病灶。1例患者rCBF减低,MTT、TP延长,rCBV明显下降,经随访证实为脑梗死。结论多层螺旋CT脑灌注成像能早期发现脑缺血灶部位和范围及推测半暗带区域、评估脑缺血预后,是一种最具潜力的脑缺血检查方法。  相似文献   

14.
目的:应用单光子计算机断层显像(SPECT)探讨局部脑血流(rCBF)变化与多发性脑梗死性痴呆(MID)的关系。方法:选择多发性脑梗死性痴呆组(MID组)、多发性脑梗死组(MI组)患者各20例,正常对照组20例,应用SPECT进行断层脑扫描,运用patlakplot法得出两侧大脑半球的平均血流量(mCBF),并且对大脑半球脑叶及基底核设置感兴趣区,定量测定rCBF。结果:MID组、MI组较对照组全脑mCBF均降低(P<0.01,P<0.05);额叶及基底核区域rCBF降低显著(P<0.05);MID组的额叶、颞叶皮质rCBF显著低于MI组(P<0.01,P<0.05);MID组神经心理测试MMSE评分为17.2±7.18,直线相关分析显示额叶皮质rCBF变化与MMSE呈有意义的正相关(r=0.712,P<0.05)。结论:应用SPECT对MI患者脑血流动态测定,尤其是将额叶血流低下作为敏感指标,可预测及早期发现MID病例,这对于预防MID的发生,延缓疾呆进展具有重要意义。  相似文献   

15.
目的观察持续植物状态(persistent vegetative state,PVS)患者脑血流灌注情况,并以此判断高压氧综合治疗的效果分析.方法采用99Tcm-双半胱乙酰(99Tcm-ECD)单光子发射型计算机断层(simple porton emission computertomograph,SPECT)显像方法对26例不同病因所致的PVS患者进行了观察,9例随访60 d至3年,其中17例行脑CT,14例行脑MRI检查.结果26例PVS患者脑血流灌注全部显示异常,9例PVS患者显示部位与脑CT或MRI相符,9例不符.9例随访观察SPECT显示,6例随病情恢复,脑血流灌注亦恢复正常,另3例中,2例患者无明显变化,仍处于PVS,1例患者血流灌注进一步减少,3年后死亡.结论99Tcm-ECD脑SPECT显像检查安全可靠,可明确反映PVS患者脑血流灌注情况,弥补脑CT或MRI之不足,并可作为高压氧综合治疗PVS观察预后的指标.  相似文献   

16.
SYNOPSIS
For the past 6 years, patients with headaches followed and treated by this laboratory have undergone ateach visit serial measurements of regional cephalic blood flow (rCBF) with neurological and medicalexaminations, direct interviews and completion of questionnaires regarding type, frequency, presence andseverity of head pain. Of 369 patients referred with recurrent headaches, 324 were classified classic,common, or complicated migraine, either alone or in combination with muscle contraction headaches(mixed headaches) and 45 were considered to have pure muscle contraction headaches. For purposes ofthis report, patients with cluster headaches were excluded. Forty-two percent (136) complained ofheadaches at the time or rCBF measurements. Of these 136, 60 cases had paired CBF measurementsduring headache and when headache-free and comprise the case material analyzed. Most headaches (61%)occurred during the initial visit. During spontaneous migraine headaches, rCBF increases (hyperemia)were present among 58% of patients classified as classic migraine, 53% classified as common migraine,25% classified as complicated and 31% classified as mixed. Cephalic blood flow values were reducedduring prodromes of classic migraine. Patchy zones of oligemia and hyperemia appeared at the onset ofheadache. Cephalic hyperemia usually returned to normal values a few days after headaches subsided.During headache, 32% of the patients showed gross dysautoregulation with paradoxical flow increasesduring 100% oxygen inhalation. Results are consonant with a vascular pathogenesis for prodromes andheadaches of migraine.  相似文献   

17.
The aim of this study was to evaluate the rCBF (133Xe clearance method) in migrainous patients free from attack. Fifty patients suffering from migraine without aura (group M) and 20 suffering from migraine with aura (group MA) (age range 20-50 years) were submitted to 32 channel rCBF mapping during the interictal period. The rCBF data of patients were compared with those obtained from 60 healthy control subjects (group C) and 21 patients suffering from tension-type headache (group TH). The mean (average of all channels) rCBF values were: group M=70.5 ± 13.7ml/100g/min; group MA=56.6 ± 11.4ml/100g/min; group C=62.3 ± 8.3ml/100g/min; group TH=62.1 ± 8.4ml/100g/min (F=11.93; p <0.001). As expected, patients belonging to group TH had a normal rCBF. The mean rCBF of group M was significantly higher than that of groups C and TH, while in group MA it was significantly lower than in groups C and TH. Group M showed a diffuse hyperemia, while group MA showed rCBF values significantly lower than normal in posterior regions, according to aura. Our results suggest that: (a) the rCBF pattern in migrainous patients is different from that in both controls and TH patients, even during the interictal period; (b) patients suffering from migraine with and without aura are two distinct subpopulations with opposite rCBF deviations.  相似文献   

18.
经颅多普勒超声对椎-基底动脉流速减慢的分析与探讨   总被引:2,自引:0,他引:2  
目的通过经颅多普勒超声(TCD)检测椎-基底动脉,对平均血流速度(Vm)减慢病例进行分析,探讨引起椎-基底动脉Vm减慢的真正原因。方法对156例椎-基底动脉Vm减慢(至少一侧椎动脉Vm低于25cm/s或基底动脉Vm低于30cm/s)患者与椎-基底动脉血管CT(CTA)或血管造影(DSA)对照分析。结果156例患者中,椎-基底动脉正常者,18.6%;双椎动脉发育不对称者,17.3%;一侧椎动脉狭窄者,16.0%;双侧椎动脉狭窄者,19.2%;一侧椎动脉闭塞者,14.8%;一侧狭窄一侧闭塞者,9.0%;基底动脉狭窄者,5.1%。结论TCD在检测椎-基底动脉狭窄过程中发挥了不可替代的作用。  相似文献   

19.
The effect of NB-818 on regional cerebral cortical blood flow (rCBF) during normal and ischemic periods was studied in Mongolian gerbils by means of hydrogen clearance methods, and that effect was compared with that of nimodipine. In normal animals, the rCBF increased dose-dependently, when NB-818 was tested. The increased rCBF showed a slow onset and long duration of action. When comparing the potency of increase in rCBF, the action of NB-818 (0.01-0.1 mg/kg i.p.) was more potent and longer lasting than that of nimodipine (0.01-0.1 mg/kg i.p.). Thus, the cerebral ischemia, produced by unilateral common carotid artery (CCA) occlusion, was studied. Before the unilateral CCA occlusion, the rCBF value was 41.4 +/- 0.27 ml/100 g of brain per min. The rCBF after unilateral CCA occlusion in gerbils was divided into three types as follows: rCBF values of above 30 ml/100 g of brain per min (type I), between 20 to 29 ml/100 g of brain per min (type II) and below 19 ml/100 g of brain per min (type III). In type I and II, NB-818 (0.01-0.1 mg/kg i.p.) significantly improved the reduced rCBF after the occlusion, and its effects continued throughout the experiments. In type II and III, supratentorial brain edema was observed 4.5 hr after the occlusion. The brain edema was significantly inhibited by NB-818 in the type II but not in the type III because the increased rCBF in type III with NB-818 was slight.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

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