Study on ultrasound assessment of hemodynamics in patients with unilateral middle cerebral artery occlusion after superficial temporal artery-middle cerebral artery bypass surgery
10.3969/j.issn.1672-5921.2024.11.003
- VernacularTitle:血管超声在单侧大脑中动脉闭塞行颞浅动脉-大脑中动脉血管旁路移植术患者术后血流动力学评估的应用研究
- Author:
Yanhong YAN
1
;
Pinjing HUI
;
Ziwei LU
;
Bai ZHANG
;
Yafang DING
;
Yabo HUANG
;
Peng ZHOU
;
Chunhong HU
Author Information
1. 215006 苏州大学附属第一医院神经外科-颈脑血管超声
- Keywords:
Middle cerebral artery;
Occlusion;
Bypass;
Ultrasonography;
Cerebral hemodynamic
- From:
Chinese Journal of Cerebrovascular Diseases
2024;21(11):730-743
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the dynamic changes in cerebral hemodynamics in patients with unilateral middle cerebral artery(MCA)occlusion after superficial temporal artery(STA)-MCA bypass surgery.Methods One hundred and nine patients diagnosed with unilateral MCA occlusion by DSA who underwent STA-MCA bypass surgery were retrospectively included in the Department of Neurosurgery of the First Affiliated Hospital of Soochow University.Clinical data of patients were collected within 24 hours after admission,including age,sex,body mass index,stroke risk factors including hypertension,hyperlipidemia,diabetes,smoking,drinking history and atrial fibrillation,clinical manifestations(within the last 6 months;nonspecific symptoms[dizziness,memory loss,unresponsiveness,etc.],transient ischemic attack,and stroke),blood biochemical markers(low density lipoprotein cholesterol,high density lipoprotein cholesterol,triglyceride,total cholesterol,fasting blood glucose,and hypersensitive C-reactive protein),and National Institutes of Health stroke scale(NIHSS)score at admission.Color Doppler ultrasound(CDU)and transcranial color coded Doppler(TCCD)ultrasound were used to evaluate the hemodynamic parameters of STA before and at different periods after surgery(4-7 days and 1,3,6,12 months after surgery)to analyze the patency of bypass arteries and intracranial hemodynamic changes,and to check the consistency of the results of the bridge artery patency at 12 months postoperatively by CDU and DSA,consistency test was performed.According to the results of the DSA examination 12months after surgery,the patients were divided into the bypass artery patency group and the non-patency group(stenosis or occlusion).The hemodynamic parameters at the trunk of STA,namely the extracranial segment,transcranial,and intracranial part of the bypass arteries,were compared between the two groups.It included inner diameter(D),peak systolic velocity(PSV),end-diastolic velocity(EDV),resistance index(RI),pulsation index(PI),time-averaged mean velocity(TAMV),time-averaged peak velocity(TAPV),and calculated flow of the STA trunk including TAMV flow and TAPV flow.Head CT,CT angiography(CTA)above the aortic arch,and CT perfusion(CTP)of the whole brain were performed 1 to 3 days before surgery and 12 and 18 months after surgery to observe the changes in cerebral perfusion.Head CT was performed 1 to 2 days after the operation to observe whether there were new hemorrhagic and ischemic lesions in the operative area.the CTP parameters of the two groups were compared including 12 and 18 months after the operation with 1 to 3 days before the surgery,and the differences in CTP parameters between the two groups were compared.The modified Rankin scale(mRS)was used to evaluate the neurological function prognosis of the patients at 12 and 18 months after surgery.The mRS score 2 was divided into a good prognosis and mRS score≥3 was a poor prognosis.NIHSS score of the patients was recorded 7 days,12,and 18 months after surgery.Results(1)Consistency analysis of CDU and DSA:the consistency of the assessment of bypass artery patency was excellent at 12 months after surgery,and the Kappa value was 0.94(95％CI 0.81-1.00,P＜0.01).According to DSA,101 cases(92.7％)were in bypass artery patency group,while 8 cases(7.3％)in the non-patency group(no case of occluded bridge vessel was found),and the sites of stenosis in the bypass arteries were all located in the transcranial segment.(2)Hemodynamic parameters:compared with the preoperative results,the D of the extracranial segment increased on 4-7 days and 1,3,6,and 12 months after the operation(Wald x2=30.438).Hemodynamic parameters included increased blood velocity such as PSV,EDV,TAMV,and TAPV(Waldx2 was 12.117,29.310,31.075 and 17.525,respectively)and blood flow including TAMV flow and TAPV flow(Wald x2 was 54.503 and 34.986,respectively)increased,while RI and PI values were decreased(Waldx2 was 112.568 and 103.629,respectively),and the differences were statistically significant(all P＜0.05).However,there was no significant difference in hemodynamic parameters in the non-patency group at 12 months after operation(all P＞0.05).Compared with 4-7 days after surgery,PSV(252.0[206.8,315.3]cm/s vs.102.5[84.0,119.0]cm/s)and EDV(119.5[106.3,159.8]cm/s vs.43.5[36.8,52.0]cm/s)in the non-patency group were significantly higher at the cranial entrance 12 months after surgery(both P＜0.05),but there was no significant difference in RI and PI values(both P＞0.05).Compared with 4-7 days after surgery,the blood flow parameters of STA intracranial segment,including PSV(29.4[24.8,41.4]cm/s vs.111.5[63.3,120.0]cm/s),EDV(19.7[15.2,22.2]cm/s vs.58.5[28.3,70.0]cm/s)and PI(0.55[0.42,0.63]vs.0.83[0.61,0.90])values in the non-patency group at 12 months after surgery were significantly decreased(all P＜0.05).(3)CTP parameters:the relative cerebral blood flow(rCBF)of the patency group increased at 12 and 18 months after surgery compared to preoperative levels,while relative cerebral blood volume(rCBV),relative peak time(rTTP)and relative mean transit time(rMTT)decreased,with statistical significance(all P＜0.05).At 12 and 18 months after operation,rCBF increased,while rMTT decreased in the non-patency group(both P＜0.05),but there was no significant difference as for rCBV and rTTP.The rTTP of the patency group at 12 and 1 8 months was lower than that of the non-patency group(12 months after surgery:1.14[1.06,1.15]vs.1.20[1.14,1.28],P=0.024;1 8 months after surgery:1.14[1.06,1.15]vs.1.20[1.14,1.28],P=0.023),but there was no statistical significance for other parameters between the two groups(all P＞0.05).(4)NIHSS score and prognosis:clinical follow-up results 18 months after the operation showed that no new stroke occurred during the follow-up period.The NIHSS scores in the patency group and the non-patency group were remarkably lower at 7 days,12,and 18 months after surgery than at admission(patency group:2[0,4],1[0,2],0[0,2]vs.3[0,6],respectively;the non-patency group:3[1,5],3[1,6],2[1,6]vs.4[1,7],respectively),with significant differences(all P＜0.05);However,the NIHSS scores in the patency group were significantly lower than that in the non-patency group at 12 and 18 months after surgery,and the proportion of patients with good prognosis in the patency group was substantially higher than that in the non-patency group(12months:87.1％[88/101]vs.4/8,P=0.039;18 months:90.1％[91/101]vs.4/8,P=0.025).Conclusion CDU can quantitatively evaluate the hemodynamic changes of bypass arteries after the STA-MCA bypass procedure,which can be applied to the long-term dynamic follow-up after the surgery.
