Objective To investigate the correlation between the hemoglobin glycation index(HGI)and the severity of intraplaque neovascularization(IPN)in patients with mild-to-moderate carotid artery stenosis.Methods This study retrospectively and consecutively enrolled patients with mild-to-moderate carotid artery stenosis(＜70%narrowing)hospitalized in the Department of Neurology at the Hefei Second People's Hospital between June,2020 and June,2024.Demographic data(age,gender),personal history(smoking,drinking),cerebrovascular risk factors(hypertension,diabetes,hyperlipidemia),body mass index,and laboratory indicators from fasting venous blood collected on the second morning of hospital admission(neutrophils,lymphocytes,neutrophil-to-lymphocyte ratio,platelet count,total cholesterol,triglycerides,high-density lipoprotein cholesterol,low-density lipoprotein cholesterol(LDL-C),homocysteine,blood glucose,and glycated hemoglobin[HbA1c])were collected and compared.A univariate linear regression analysis was performed to assess the relationship between fasting blood glucose and HbA1c levels measured on the second day after admission,yielding the prediction formula:predicted HbA1c(%)=0.571×fasting blood glucose(mmol/L)+3.125.Subsequently,HGI was calculated through:HGI=actual HbA1c-predicted HbA1c.Carotid ultrasound was used to measure patients'carotid intima-media thickness,and,plaque location,thickness(maximum plaque diameter),length,echogenicity,and resistance index.For patients with multiple plaques,the thickest plaque was selected as the target plaque.Using the AngioPLUS mode of carotid ultrasound,dynamically observe for presence of IPN at the filling defect of the carotid artery plaque.The IPN condition of the target plaque was then assessed,including the number,location,morphology(e.g.,punctate,short linear,etc.),and spectral Doppler characteristics of the new blood vessels.The IPN signals were counted and scored according to the following criteria:absence of high-echogenicity blood flow signals in the target carotid artery plaque indicating no neovascularization,was scored as 0 point;the presence of fewer than 4 punctate or short linear hyperechoic blood flow signals within the target plaque was scored as 1 point;the presence of diffusely distributed(≥4)short linear or strip-like hyperechoic blood flow signals within the plaque was scored as 2 points.A higher IPN score indicates a more severe degree of IPN.Patients with an IPN score of 0-1 were categorized as the low IPN score group,while those with an IPN score of 2 were classified as the high IPN score group.Indicators with statistically significant differences between the two groups in the univariate analysis and exhibited no multicollinearity were included in the multivariate binary Logistic regression model to analyze the relationship between HGI and the severity of carotid IPN.Results A total of 387 patients(222 males and 165 females,with a mean age of[70±10]years)with mild-to-moderate carotid artery stenosis were included in this study.Among the 387 patients enrolled,97 were in the low IPN score group,while 290 were in the high IPN score group.(1)The high IPN score group exhibited significantly higher average age([71±10]years vs.[67±10]years),higher prevalence of hypertension(79.7%[231/290]vs.67.0%[65/97]),higher prevalence of diabetes(37.6%[109/290]vs.14.4%[14/97]),greater plaque thickness(2.40[2.00,3.10]mm vs.2.30[1.80,2.70]mm),higher HbA1c levels(6.25%[5.70%,7.20%]vs.5.80%[5.50%,6.40%]),and higher HGI values(-0.05%[-0.39%,0.46%]vs.-0.29%[-0.56%,-0.10%])in comparison to the low IPN score group(all P＜0.05).Additionally,the high IPN score group had significantly lower lymphocyte ratios([27.75±9.19]%vs.[30.17±9.04]%)and lower LDL-C levels([2.19±0.81]mmol/L vs.[2.43±0.91]mmol/L;both P＜0.05).(2)The results of multivariate Logistic regression analysis indicated that age(OR,1.031,95%CI 1.004-1.060,P=0.027),HGI(OR,1.782,95%CI 1.066-2.979,P=0.028),and plaque thickness(OR,1.750,95%CI 1.229-2.490,P=0.002)were independent influencing factors associated with the severity of IPN in the mild-to-moderate carotid artery stenosis.Conclusions High HGI may serve as an independent risk factor for the severe IPN in patients with mild-to-moderate carotid artery stenosis.However,the findings of this study require further validation through multi-center,large-scale,prospective clinical trials.

Objective To compare the effects of dexmedetomidine and midazolam on intraoperative blood pressure and postoperative 90-day outcome of endovascular treatment(EVT)in patients with acute anterior circulation large vessel occlusive stroke.Methods Retrospective consecutive patients with acute anterior circulation large vessel occlusion stroke who received EVT within 24 hours of onset,admitted to the Department of Neurology at the Second People's Hospital of Hefei from January 2024 to February 2025 were included.Patients were divided into the dexmedetomidine group and the midazolam group based on the choice of sedative in EVT.Baseline and clinical data were collected from patients,including sex,age,medical history(hypertension,diabetes,atrial fibrillation,stroke history),smoking history,blood pressure at admission(systolic,diastolic,mean arterial pressure),National Institutes of Health stroke scale(NIHSS)score at admission,trial of Org 10172 in acute stroke treatment(TOAST)classification,and site of vascular occlusion(internal carotid artery,M1 segment of the middle cerebral artery).Procedure related parameters,including intravenous thrombolysis before EVT,intraoperative use of tirofiban,modified thrombolysis in cerebral infarction(mTICI)grade,thrombectomy techniques(stent-retriever thrombectomy,aspiration thrombectomy,combined stent-retriever and aspiration thrombectomy,and other salvage measures),number of thrombectomy,time from onset to revascularization,time from puncture to revascularization,blood pressure during EVT(minimum systolic,minimum diastolic,and minimum mean arterial pressure),and blood pressure at the end of EVT(systolic,diastolic,and mean arterial pressure).The primary outcome was good prognosis at 90 days after EVT(modified Rankin scale score of 0-2 at 90 days),while secondary outcome was＞20％decrease in mean arterial pressure during EVT,early neurological improvement(ENI;a decrease on NIHSS score no less than 8 or a reduction of NIHSS score to 0-1 at 24 hours after EVT),and early neurological deterioration(END;an increase of more than 2 points on the NIHSS at 24 hours after procedure).Safety outcomes included any intracranial hemorrhage within 48 hours after EVT,symptomatic intracranial hemorrhage within 48 hours after EVT(sICH;intracranial hemorrhage confirmed by head CT leading to neurological deterioration,with an increase in NIHSS score of at least 4 points,or the presence of potentially fatal intracranial hemorrhage on head CT),pneumonia within 2 weeks after EVT,and the 90-day mortality after EVT.The baseline and clinical data,EVT conditions,primary outcome,secondary outcome,and safety indicators were compared between the two groups.Univariate Logistic regression analysis was used to screen the variables associated with a decrease in mean arterial pressure＞20％during EVT in patients with acute anterior circulation large vessel occlusive stroke.Variables with P＜0.15 and those considered potentially influential based on clinical experience were included in multivariate Logistic regression analysis to identify predictors of a＞20％decrease in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusive stroke.Results A total of 93 patients with acute anterior circulation large vessel occlusive stroke who underwent EVT were included,comprising 51 males and 42 females,aged 34 to 99 years,with an average of(71±13)years old.Among them,63 patients were in the dexmedetomidine group,and 30 patients were in the midazolam group.33 patients showed＞20％decreases in mean arterial pressure during EVT,while 60 patients had ≤20％decreases.(1)Compare with the midazolam group,the proportion of female patients in the dexmedetomidine group was lower(36.5％[23/63]vs.63.3％[19/30],P=0.015),and the age was younger([69±13]years vs.[77±13]years,P=0.005).There were no statistically significant differences in other baseline and clinical data(all P＞0.05).(2)In comparison with the midazolam group,the dexmedetomidine group had a higher proportion of patients with more thrombectomy procedures(1.00[1.00,2.00]times vs.1.00[1.00,1.25]times,P=0.011),END(27.0％[17/63]vs.6.7％[2/30],P=0.023),sICH within 48 hours(19.0％[12/63]vs.3.3％[1/30],P=0.041),and a decrease in mean arterial pressure＞20％during EVT(42.9％[27/63]vs.20.0％[6/30],P=0.031).There were no statistically significant differences in the remaining EVT conditions,primary outcome,secondary outcome,and safety indicators(all P＞0.05).(3)The results of univariate Logistic regression analysis showed that diastolic blood pressure at admission(P=0.002),mean arterial pressure at admission(P=0.009),and dexmedetomidine sedation(P=0.036)were the influencing factors of a decrease＞20％in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusion stroke.(4)The results of multivariate Logistic regression analysis showed that dexmedetomidine sedation(OR,3.271,95％CI 1.057-10.126,P=0.040)and higher diastolic blood pressure on admission(OR,1.105,95％CI 1.006-1.213,P=0.037)were independent predictors of a decrease over 20％in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusive stroke.Conclusions Dexmedetomidine is an independent predictor of an over 20％decrease in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusive stroke,but there is no statistically significant differences in the rate of good neurological function at 90 days and 90-day mortality postoperatively between the two groups.Further prospective randomized controlled studies are needed.

Objective To investigate the correlation between the hemoglobin glycation index(HGI)and the severity of intraplaque neovascularization(IPN)in patients with mild-to-moderate carotid artery stenosis.Methods This study retrospectively and consecutively enrolled patients with mild-to-moderate carotid artery stenosis(＜70%narrowing)hospitalized in the Department of Neurology at the Hefei Second People's Hospital between June,2020 and June,2024.Demographic data(age,gender),personal history(smoking,drinking),cerebrovascular risk factors(hypertension,diabetes,hyperlipidemia),body mass index,and laboratory indicators from fasting venous blood collected on the second morning of hospital admission(neutrophils,lymphocytes,neutrophil-to-lymphocyte ratio,platelet count,total cholesterol,triglycerides,high-density lipoprotein cholesterol,low-density lipoprotein cholesterol(LDL-C),homocysteine,blood glucose,and glycated hemoglobin[HbA1c])were collected and compared.A univariate linear regression analysis was performed to assess the relationship between fasting blood glucose and HbA1c levels measured on the second day after admission,yielding the prediction formula:predicted HbA1c(%)=0.571×fasting blood glucose(mmol/L)+3.125.Subsequently,HGI was calculated through:HGI=actual HbA1c-predicted HbA1c.Carotid ultrasound was used to measure patients'carotid intima-media thickness,and,plaque location,thickness(maximum plaque diameter),length,echogenicity,and resistance index.For patients with multiple plaques,the thickest plaque was selected as the target plaque.Using the AngioPLUS mode of carotid ultrasound,dynamically observe for presence of IPN at the filling defect of the carotid artery plaque.The IPN condition of the target plaque was then assessed,including the number,location,morphology(e.g.,punctate,short linear,etc.),and spectral Doppler characteristics of the new blood vessels.The IPN signals were counted and scored according to the following criteria:absence of high-echogenicity blood flow signals in the target carotid artery plaque indicating no neovascularization,was scored as 0 point;the presence of fewer than 4 punctate or short linear hyperechoic blood flow signals within the target plaque was scored as 1 point;the presence of diffusely distributed(≥4)short linear or strip-like hyperechoic blood flow signals within the plaque was scored as 2 points.A higher IPN score indicates a more severe degree of IPN.Patients with an IPN score of 0-1 were categorized as the low IPN score group,while those with an IPN score of 2 were classified as the high IPN score group.Indicators with statistically significant differences between the two groups in the univariate analysis and exhibited no multicollinearity were included in the multivariate binary Logistic regression model to analyze the relationship between HGI and the severity of carotid IPN.Results A total of 387 patients(222 males and 165 females,with a mean age of[70±10]years)with mild-to-moderate carotid artery stenosis were included in this study.Among the 387 patients enrolled,97 were in the low IPN score group,while 290 were in the high IPN score group.(1)The high IPN score group exhibited significantly higher average age([71±10]years vs.[67±10]years),higher prevalence of hypertension(79.7%[231/290]vs.67.0%[65/97]),higher prevalence of diabetes(37.6%[109/290]vs.14.4%[14/97]),greater plaque thickness(2.40[2.00,3.10]mm vs.2.30[1.80,2.70]mm),higher HbA1c levels(6.25%[5.70%,7.20%]vs.5.80%[5.50%,6.40%]),and higher HGI values(-0.05%[-0.39%,0.46%]vs.-0.29%[-0.56%,-0.10%])in comparison to the low IPN score group(all P＜0.05).Additionally,the high IPN score group had significantly lower lymphocyte ratios([27.75±9.19]%vs.[30.17±9.04]%)and lower LDL-C levels([2.19±0.81]mmol/L vs.[2.43±0.91]mmol/L;both P＜0.05).(2)The results of multivariate Logistic regression analysis indicated that age(OR,1.031,95%CI 1.004-1.060,P=0.027),HGI(OR,1.782,95%CI 1.066-2.979,P=0.028),and plaque thickness(OR,1.750,95%CI 1.229-2.490,P=0.002)were independent influencing factors associated with the severity of IPN in the mild-to-moderate carotid artery stenosis.Conclusions High HGI may serve as an independent risk factor for the severe IPN in patients with mild-to-moderate carotid artery stenosis.However,the findings of this study require further validation through multi-center,large-scale,prospective clinical trials.

Objective To compare the effects of dexmedetomidine and midazolam on intraoperative blood pressure and postoperative 90-day outcome of endovascular treatment(EVT)in patients with acute anterior circulation large vessel occlusive stroke.Methods Retrospective consecutive patients with acute anterior circulation large vessel occlusion stroke who received EVT within 24 hours of onset,admitted to the Department of Neurology at the Second People's Hospital of Hefei from January 2024 to February 2025 were included.Patients were divided into the dexmedetomidine group and the midazolam group based on the choice of sedative in EVT.Baseline and clinical data were collected from patients,including sex,age,medical history(hypertension,diabetes,atrial fibrillation,stroke history),smoking history,blood pressure at admission(systolic,diastolic,mean arterial pressure),National Institutes of Health stroke scale(NIHSS)score at admission,trial of Org 10172 in acute stroke treatment(TOAST)classification,and site of vascular occlusion(internal carotid artery,M1 segment of the middle cerebral artery).Procedure related parameters,including intravenous thrombolysis before EVT,intraoperative use of tirofiban,modified thrombolysis in cerebral infarction(mTICI)grade,thrombectomy techniques(stent-retriever thrombectomy,aspiration thrombectomy,combined stent-retriever and aspiration thrombectomy,and other salvage measures),number of thrombectomy,time from onset to revascularization,time from puncture to revascularization,blood pressure during EVT(minimum systolic,minimum diastolic,and minimum mean arterial pressure),and blood pressure at the end of EVT(systolic,diastolic,and mean arterial pressure).The primary outcome was good prognosis at 90 days after EVT(modified Rankin scale score of 0-2 at 90 days),while secondary outcome was＞20％decrease in mean arterial pressure during EVT,early neurological improvement(ENI;a decrease on NIHSS score no less than 8 or a reduction of NIHSS score to 0-1 at 24 hours after EVT),and early neurological deterioration(END;an increase of more than 2 points on the NIHSS at 24 hours after procedure).Safety outcomes included any intracranial hemorrhage within 48 hours after EVT,symptomatic intracranial hemorrhage within 48 hours after EVT(sICH;intracranial hemorrhage confirmed by head CT leading to neurological deterioration,with an increase in NIHSS score of at least 4 points,or the presence of potentially fatal intracranial hemorrhage on head CT),pneumonia within 2 weeks after EVT,and the 90-day mortality after EVT.The baseline and clinical data,EVT conditions,primary outcome,secondary outcome,and safety indicators were compared between the two groups.Univariate Logistic regression analysis was used to screen the variables associated with a decrease in mean arterial pressure＞20％during EVT in patients with acute anterior circulation large vessel occlusive stroke.Variables with P＜0.15 and those considered potentially influential based on clinical experience were included in multivariate Logistic regression analysis to identify predictors of a＞20％decrease in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusive stroke.Results A total of 93 patients with acute anterior circulation large vessel occlusive stroke who underwent EVT were included,comprising 51 males and 42 females,aged 34 to 99 years,with an average of(71±13)years old.Among them,63 patients were in the dexmedetomidine group,and 30 patients were in the midazolam group.33 patients showed＞20％decreases in mean arterial pressure during EVT,while 60 patients had ≤20％decreases.(1)Compare with the midazolam group,the proportion of female patients in the dexmedetomidine group was lower(36.5％[23/63]vs.63.3％[19/30],P=0.015),and the age was younger([69±13]years vs.[77±13]years,P=0.005).There were no statistically significant differences in other baseline and clinical data(all P＞0.05).(2)In comparison with the midazolam group,the dexmedetomidine group had a higher proportion of patients with more thrombectomy procedures(1.00[1.00,2.00]times vs.1.00[1.00,1.25]times,P=0.011),END(27.0％[17/63]vs.6.7％[2/30],P=0.023),sICH within 48 hours(19.0％[12/63]vs.3.3％[1/30],P=0.041),and a decrease in mean arterial pressure＞20％during EVT(42.9％[27/63]vs.20.0％[6/30],P=0.031).There were no statistically significant differences in the remaining EVT conditions,primary outcome,secondary outcome,and safety indicators(all P＞0.05).(3)The results of univariate Logistic regression analysis showed that diastolic blood pressure at admission(P=0.002),mean arterial pressure at admission(P=0.009),and dexmedetomidine sedation(P=0.036)were the influencing factors of a decrease＞20％in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusion stroke.(4)The results of multivariate Logistic regression analysis showed that dexmedetomidine sedation(OR,3.271,95％CI 1.057-10.126,P=0.040)and higher diastolic blood pressure on admission(OR,1.105,95％CI 1.006-1.213,P=0.037)were independent predictors of a decrease over 20％in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusive stroke.Conclusions Dexmedetomidine is an independent predictor of an over 20％decrease in mean arterial pressure during EVT in patients with acute anterior circulation large vessel occlusive stroke,but there is no statistically significant differences in the rate of good neurological function at 90 days and 90-day mortality postoperatively between the two groups.Further prospective randomized controlled studies are needed.

Intraocular silicone oil injection is a common method for treating retinal detachment. Cataracts, increased intraocular pressure, corneal lesions, and silicone oil emulsification are relatively common complications of intraocular silicone oil tamponade. The migration of silicone oil from the vitreous body into the ventricles along the optic nerve is extremely rare, which is easily misdiagnosed as intraventricular hemorrhage, and colloidal cyst. This paper reviews the overview, migration pathway, clinical characteristics, imaging features, treatment and outcomes of silicone oil migration into the ventricular system in order to improve the understanding of this phenomenon among clinical colleagues.

Objective: To explore the changes of awareness of tuberculosis and access to tuberculosis-related information among students in Zhejiang Province. Methods: There were 554 students younger than 30 y were included in the study during April to sept. of 2014 and during sept. to Nov. of 2018. Univariate and multivariate Logistic regression were conducted to find the related factors of knowing about tuberculosis and related knowledge. Chi-square test was used to analyze the changes of ways access to tuberculosis-related information. Results: There were 440 participants (79.4%) aware of tuberculosis, including 215(85.7%) in 2014 and 225(74.3%) in 2018. The factors affecting awareness on tuberculosis were female ( AOR=1.60, 95%CI =1.04-2.47) vs male; and junior middle school( AOR=1.99, 95%CI =1.03-3.85), high school( AOR=3.27, 95%CI =1.57-6.81), college or higher ( AOR=6.73，95%CI =2.55-17.76) vs primary school or lower; year 2018 ( AOR=0.50, 95%CI =0.31-0.80) vs 2014. There was no significant statistical difference in the overall knowledge scores of tuberculosis between the students in the two surveys. In 2018, the proportion of tuberculosisrelated information accessed from the Internet (forum, WeChat, Weibo.) and community activities (assembly promotion)(75.10%, 26.70%) was higher than that of 2014(36.20%, 13.10%)( χ 2=68.88, 12.79, P <0.05). Conclusion The proportion of students aware of tuberculosis and TB control in Zhejiang Province were not significantly improved. Higher proportion of students get tuberculosis-related information from the new media. Therefore, it is necessary to strengthen health education of tuberculosis in schools, especially through the usage of new media apart from traditional pathways.

Objective:To investigate the correlation between basilar artery (BA) dolichosis and clinical outcome of patients with acute isolated pontine infarction.Methods:Consecutive patients with acute isolated pontine infarction within 7 d after onset admitted to the Department of Neurology, the Affiliated Hefei Hospital of Anhui Medical University were enrolled. The demographic, clinical and MRI data were collected. The modified Rankin Scale was used to evaluate the clinical outcome at 3 months after the onset. 0-2 was defined as good outcome, and >2 was defined as poor outcome. A binary multivariate logistic regression model was used to analyze the correlation between BA dolichosis and clinical outcome of the patients. Results:A total of 116 patients with acute isolated pontine infarction were enrolled. There were 69 (59.5%) males and 47 (40.5%) females, with a median age of 65 years (interquartile range: 57-76 years). There were 39 patients (33.6%) in BA dolichosis group and 77 (66.4%) in non-BA dolichosis group. The BA diameter ( P=0.021), theoretical length (basilar artery length, BAL) ( P<0.001), bending length (BL) ( P<0.001) and the proportion of patients with BA bending ( P<0.001) in the BA dolichosis group were significantly higher than those of the non-BA dolichosis group. There were 93 (80.2%) patients in good outcome group and 23 (19.8%) in poor outcome group. The baseline National Institute of Health stroke scale (NIHSS) score ( P<0.001), approximate length of BA ( P=0.007), BAL ( P=0.020), BL ( P=0.005) and the proportion of patients with BA dolichosis ( P=0.002) and bending ( P=0.008) in the poor outcome group were significantly higher than those in the good outcome group. Spearman correlation analysis showed that the approximate length of BA was significantly positively correlated with BL ( r=0.597, P<0001). Multivariate logistic regression analysis showed that BA dolichosis (odds ratio 5.441, 95% confidence interval 1.814-16.320; P=0.003) and the higher baseline NIHSS score (odds ratio 1.696, 95% confidence interval 1.291-2.228; P<0.001) were the independent risk factors for poor outcomes in patients with acute isolated pontine infarction. Conclusion:BA dolichosis is common in patients with acute isolated pontine infarction. BA dolichosis may be an independent risk factor for poor outcome in patients with acute isolated pontine infarction at 3 months after onset.

Objective To investigate the correlation between ipsilateral posterior cerebral artery laterality (PCAL) and the outcomes in patients with ischemic stroke in the middle cerebral artery (MCA) territory. Methods From June 2015 to December 2016, patients with acute ischemic stroke in the MCA territory admitted to the Second People's Hospital of Hefei were enrolled. Magnetic resonance angiography (MRA) was used to assess PCAL. The outcome was evaluated by the modified Rankin scale at 3 months after onset. 0-2 was defined as good outcome and > 2 was defined as poor outcome. Multivariate logistic regression analysis was used to determine the independent influencing factors of clinical outcome. Results A total of 111 patients with ischemic stroke in MCA territory were enrolled, including 47 (42. 3％) PCAL and 30 (27. 0％) poor outcomes. The baseline NIHSS score in the PCAL group was significantly lower than that in the non-PCAL group (5. 13 ± 3. 29 years vs. 7. 03 ± 5. 676 years, t = 2. 058; P = 0. 042). There were significantly differences in the proportion of diabetes mellitus (29. 6％ vs. 10. 0％; χ2 = 4. 583, P = 0. 032), PCAL (51. 9％ vs. 16. 7％;χ2 = 11. 101, P = 0. 001) and smoking (25. 9％ vs. 13. 3％; χ2 = 4. 943, P = 0. 026), as well as age (63. 9 ± 11. 8 years vs. 71. 0 ± 6. 7 years; t = 2. 688, P = 0. 007), baseline diastolic blood pressure (89 ± 13 mmHg vs. 82 ± 10 mmHg; t = -2. 249, P = 0. 025; 1 mmHg = 0. 133 kPa) and baseline NIHSS score (5. 02 ± 3. 67 vs. 9. 47 ± 6. 20; t = 3. 883, P < 0. 001) between the good outcome group and the poor outcome group. Multivariate logistic regression analysis showed that PCAL was associated independently with good outcome (odds ratio [OR] 0. 272, 95％ confidence interval [CI] 0. 083-0. 888; P = 0. 031), while advanced age (OR 1. 088, 95％ CI 1. 022-1. 157; P = 0. 008) and high baseline NIHSS score (OR 1. 224, 95％ CI 1. 077-1. 391; P = 0. 002) were associated independently with poor outcome. Conclusion PCAL is associated independently with good outcome in patients with ischemic stroke in MCA territory.

Objective To investigate the correlation between FA value,ADC value and limb muscle strength score measured by magnetic resonance imaging in patients with ischemic stroke,aims to to analyze the clinical value of magnetic resonance imaging in limb muscle strength.Methods Twenty patients with acute cerebral infarction and treated from June 2015 to Junly 2016 were recruited from This hospital,and the simplified Fugl-Meyer motor function score was observed for all patients within 3 days.Tensor imaging examination was conducted to observe the distribution of nerve fiber bundles,FA value,ADC value changes.Results The FA value and ADC value of the infarct side were significantly different from those of the contralateral side(t=8.70,t=-18.70,P＜0.05);There were significant differences in FA value and ADC value between the infarcted ventricle hind limbs and the contralateral side of the infarcted ventricle(t=-5.16,t=-5.08,P＜0.05).The FA value of the infarcted ventral hind limbs had positive correlation with the simplified Fugl-Meyer motor function score(R=0.863,P=0.013).Conclusion FA value and ADC value of acute infarct and internal hindlimb are lower than FA value and ADC value of contralateral normal white matter.The FA value of internal capsule hind limbs is closely related to the simplified Fugl-Meyer motor function score.

Objeetive To investigate the clinical and imaging features in patients with clinically confirmed acute ischemic stroke and negative diffusion-weighted imaging (DWI).Methods The clinical and imaging data in patients with clinically confirmed acute ischemic stroke and initial negative DWI were collected retrospectively.According to the repeat DWI findings,they were divided into either a persistentnegative DWI group or a faise-negative DWI group.The demographics,and data of clinical and imaging at baseline between the 2 groups were compared,and the causes of the initial negative DWI were analyzed.Results A total of 15 patients with clinically confirmed acute ischemic stroke and initial negative DWI were enrolled,including 9 in the persistent-negative DWI group (9/15,60.0％) and 6 in the false-negative DWI group (6/15,40.0％),and 8 with minor stroke (National Institute of Health Stroke Scale score ≤3;8/15,53.3％).The time from onset to admission ranged from 1 to 48 h.The time from onset to initial DWI examination ranged from 5 to 65 h.The time from onset to repeat DWI ranged from 38 to 190 h.There were no significant differences in demographics,and data of clinical and imaging at baseline between the 2 groups.In 6 patients with false-negative DWI findings,5 were posterior circulation stroke (5/6,83.3％) and 1 was anterior circulation stroke (1/6,16.7％);1 might have a second infarct,1 might be associated with shorter examination time (5 h after onset),1 was associated with not reaching the diffusion limited threshold and the influence of MRI artifact before symptom aggravation,and the remaining 3 might be associated with smaller lesions and locating in the posterior circulation.The causes of 9 patients with persistent-negative DWI ffndings were unknown.Conclusions There were no significant differences in features of clinical and imaging at baseline between persistent-negative and false-negative DWI findings.False-negative DWI findings in acute ischemic stroke can be mainly seen in patients with posterior circulation stroke and minor stroke.