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LiCl掺杂PEDOT∶PSS提高蓝光量子点发光二极管的性能
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作者 王艳林 曹松 +2 位作者 余春燕 周利通 翟光美 《液晶与显示》 CAS CSCD 北大核心 2024年第6期771-780,共10页
基于全溶液制备的量子点发光二极管(QLEDs)通常存在电子-空穴注入不平衡的问题,严重地限制了蓝光QLEDs器件性能的提升。本文研究了不同浓度的金属卤化物(Li Cl)掺杂对聚(乙烯二氧噻吩)∶聚苯乙烯磺酸盐(PEDOT∶PSS)薄膜的形貌、导电率... 基于全溶液制备的量子点发光二极管(QLEDs)通常存在电子-空穴注入不平衡的问题,严重地限制了蓝光QLEDs器件性能的提升。本文研究了不同浓度的金属卤化物(Li Cl)掺杂对聚(乙烯二氧噻吩)∶聚苯乙烯磺酸盐(PEDOT∶PSS)薄膜的形貌、导电率、透光性以及所制备QLEDs器件性能的影响规律。实验结果表明,Li Cl的掺杂浓度(质量分数)为2%时蓝光QLED器件性能的提升效果最佳,这主要归因于Li Cl掺杂后的PEDOT∶PSS薄膜导电率和透光性的增强以及器件中空穴注入效率的提高。相较于未掺杂的PEDOT∶PSS基QLED器件,基于Li Cl掺杂的蓝光QLED器件的最大亮度、峰值电流效率、峰值功率效率和峰值外量子效率分别从5 083 cd·m^(-2)、0.91 cd·A^(-1)、0.59 lm·W^(-1)和2.31%提升到7 451 cd·m^(-2)、1.38 cd·A^(-1)、0.89 lm·W^(-1)和3.51%。结果表明,采用Li Cl掺杂PEDOT∶PSS空穴注入层是提高蓝光QLED性能的一种有效策略。 展开更多
关键词 蓝光量子点发光二极管 PEDOT∶pss LiCl掺杂 空穴注入层 空穴注入
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PEDOT∶PSS/石墨烯复合纤维的制备及其电化学性能研究
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作者 王圣玉 杜苑 +1 位作者 李宏伟 张梅 《北京服装学院学报(自然科学版)》 CAS 2024年第1期65-73,共9页
为了更好地实现石墨烯基纤维在柔性可穿戴储能器件领域的应用,采用改进的Hummers法制备氧化石墨烯水分散液与聚(3,4-亚乙二氧基噻吩)-聚(苯乙烯磺酸)(PEDOT∶PSS)分散液制备一定浓度的复合纺丝液;以氯化钙溶液为凝固浴,通过湿法纺丝技... 为了更好地实现石墨烯基纤维在柔性可穿戴储能器件领域的应用,采用改进的Hummers法制备氧化石墨烯水分散液与聚(3,4-亚乙二氧基噻吩)-聚(苯乙烯磺酸)(PEDOT∶PSS)分散液制备一定浓度的复合纺丝液;以氯化钙溶液为凝固浴,通过湿法纺丝技术制备不同比例的PEDOT∶PSS/氧化石墨烯复合纤维,经氢碘酸还原获得PEDOT∶PSS/石墨烯复合纤维。对PEDOT∶PSS/石墨烯复合纤维的结构形貌进行表征,PEDOT/PSS质量分数为20%时复合纤维的直径约为95μm,表面具有褶皱卷曲的形貌。以PEDOT∶PSS/石墨烯复合纤维组装柔性超级电容器,在不同凝胶电解质体系中进行电化学性能评价。结果表明,PEDOT∶PSS质量分数为20%的PEDOT∶PSS/石墨烯复合纤维在PVA/H_(2)SO_(4)凝胶电解质体系中的电化学性能最佳;当电流密度为0.14 mA/cm^(-2)时,面积比电容为420.7 mF/cm^(2),能量密度为9.35μW h/cm^(2),表现出良好的电化学性能,可为温湿度计供电,并显现出在智能可穿戴储能器件中的潜在应用前景。 展开更多
关键词 PEDOT∶pss 石墨烯纤维 湿法纺丝 柔性超级电容器 能量密度
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基于模糊MACBETH和生态位理论的PSS方案评价方法 被引量:1
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作者 曾鹏 耿秀丽 《计算机应用研究》 CSCD 北大核心 2024年第1期206-211,共6页
针对多属性决策方法与生态位理论结合的PSS评价方法权重确定过程中一致性检验繁琐、权重计算过程复杂和未考虑评价语义的模糊性的问题,模糊MACBETH用于确定客户价值的权重和客户体验阶段提供客户价值的重要性系数;该方法无须复杂的计算... 针对多属性决策方法与生态位理论结合的PSS评价方法权重确定过程中一致性检验繁琐、权重计算过程复杂和未考虑评价语义的模糊性的问题,模糊MACBETH用于确定客户价值的权重和客户体验阶段提供客户价值的重要性系数;该方法无须复杂的计算过程,利用三角模糊数处理语义的模糊性且依托软件系统自动检验一致性,提高了评价效率和准确度。针对生态位优势仅适用于完全竞争状态的优势计算,将生态位重叠与生态位优势结合,提出的竞争优势公式可以体现方案间竞争程度和生态位优势表示方案间的竞争优势的优点,反映方案间真实的竞争状态。最后以某新能源汽车制造企业PSS方案评价问题为例验证了所提方法的有效性。 展开更多
关键词 产品服务系统方案评价 客户价值 模糊MACBETH 生态位理论
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基于PSS+PXF的ISF高精度振荡器噪声分析模型
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作者 袁珩洲 桑浩 +3 位作者 刘胜 陈小文 颜广达 郭阳 《计算机工程与科学》 CSCD 北大核心 2024年第6期951-958,共8页
提出了一种基于PSS+PXF的ISF的相位噪声模型,用于预测振荡器的相位噪声。该模型相对传统的拉扎维模型考虑了振荡器的非线性时变特性,因此更加精确。通过仿真验证了该模型的有效性,基于PSS+PXF的ISF的相位噪声模型精度相比传统拉扎维模... 提出了一种基于PSS+PXF的ISF的相位噪声模型,用于预测振荡器的相位噪声。该模型相对传统的拉扎维模型考虑了振荡器的非线性时变特性,因此更加精确。通过仿真验证了该模型的有效性,基于PSS+PXF的ISF的相位噪声模型精度相比传统拉扎维模型提升200%以上。 展开更多
关键词 振荡器高精度 相位噪声 振荡器 脉冲灵敏度 周期稳态 周期传输函数
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Body composition and metabolic syndrome in patients with type 1 diabetes 被引量:1
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作者 Qiong Zeng Xiao-Jing Chen +3 位作者 Yi-Ting He Ze-Ming Ma Yi-Xi Wu Kun Lin 《World Journal of Diabetes》 SCIE 2024年第1期81-91,共11页
BACKGROUND In recent years,the prevalence of obesity and metabolic syndrome in type 1 diabetes(T1DM)patients has gradually increased.Insulin resistance in T1DM deserves attention.It is necessary to clarify the relatio... BACKGROUND In recent years,the prevalence of obesity and metabolic syndrome in type 1 diabetes(T1DM)patients has gradually increased.Insulin resistance in T1DM deserves attention.It is necessary to clarify the relationship between body composition,metabolic syndrome and insulin resistance in T1DM to guide clinical treatment and intervention.AIM To assess body composition(BC)in T1DM patients and evaluate the relationship between BC,metabolic syndrome(MS),and insulin resistance in these indi-viduals.METHODS A total of 101 subjects with T1DM,aged 10 years or older,and with a disease duration of over 1 year were included.Bioelectrical impedance analysis using the Tsinghua-Tongfang BC Analyzer BCA-1B was employed to measure various BC parameters.Clinical and laboratory data were collected,and insulin resistance was calculated using the estimated glucose disposal rate(eGDR).RESULTS MS was diagnosed in 16/101 patients(15.84%),overweight in 16/101 patients(15.84%),obesity in 4/101(3.96%),hypertension in 34/101(33.66%%)and dyslip-idemia in 16/101 patients(15.84%).Visceral fat index(VFI)and trunk fat mass were significantly and negatively correlated with eGDR(both P<0.001).Female patients exhibited higher body fat percentage and visceral fat ratio compared to male patients.Binary logistic regression analysis revealed that significant factors for MS included eGDR[P=0.017,odds ratio(OR)=0.109],VFI(P=0.030,OR=3.529),and a family history of diabetes(P=0.004,OR=0.228).Significant factors for hypertension included eGDR(P<0.001,OR=0.488)and skeletal muscle mass(P=0.003,OR=1.111).Significant factors for dyslipidemia included trunk fat mass(P=0.033,OR=1.202)and eGDR(P=0.037,OR=0.708).CONCLUSION Visceral fat was found to be a superior predictor of MS compared to conventional measures such as body mass index and waist-to-hip ratio in Chinese individuals with T1DM.BC analysis,specifically identifying visceral fat(trunk fat),may play an important role in identifying the increased risk of MS in non-obese patients with T1DM. 展开更多
关键词 Body composition Metabolic syndrome Insulin resistance Visceral fat Estimated glucose disposal rate
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基于MSSA的PSS与UPFC-POD参数和UPFC位置协调优化
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作者 和萍 云磊 +2 位作者 赵琛 王明洋 潘志文 《电力系统保护与控制》 EI CSCD 北大核心 2024年第1期174-187,共14页
针对风火打捆(wind-thermal-bundled,WTB)系统在受到干扰时可能由于阻尼不足而出现的低频振荡现象以及较高的网损会导致运行成本的增加和阻碍“双碳”目标实现的问题,提出了一种电力系统稳定器(power system stabilizer,PSS)与统一潮流... 针对风火打捆(wind-thermal-bundled,WTB)系统在受到干扰时可能由于阻尼不足而出现的低频振荡现象以及较高的网损会导致运行成本的增加和阻碍“双碳”目标实现的问题,提出了一种电力系统稳定器(power system stabilizer,PSS)与统一潮流控制器(unified power flow controller,UPFC)附加功率振荡阻尼控制器(power oscillation damping,POD)参数和UPFC安装位置协调优化策略方法。首先,基于Matlab构建了风火打捆外送系统和控制器模型。然后,利用多目标樽海鞘优化算法(multi-objective salp swarm algorithm,MSSA),将协调优化问题转化为多目标优化问题。目标函数设计中考虑了UPFC装置的调节特性。最后,采用IEEE 4机2区系统和16机5区系统进行多种工况下的仿真。仿真结果显示,协调优化后的控制器可以提高系统阻尼,维持发电机转速的稳定,抑制低频振荡引起的系统有功、电压等的波动,同时降低了系统的有功网损,提高了系统稳定性和运行经济性。MSSA在工程问题上的应用得到了补充。 展开更多
关键词 风火打捆 低频振荡 pss UPFC-POD 安装位置 运行经济性
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基于GA⁃BP的多目标PEDOT∶PSS导电非织造布性能优化
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作者 张天芸 王芃生 吴娇娇 《棉纺织技术》 CAS 2024年第3期23-29,共7页
针对聚(3,4-乙撑二氧噻吩)∶聚(苯乙烯磺酸)(PEDOT∶PSS)导电非织造布存在导电性能不稳定和机械性能较差等问题,采用神经网络模型对PEDOT∶PSS导电非织造布进行性能优化。通过收集PEDOT∶PSS导电非织造布的试验数据,作为GA-BP神经网络... 针对聚(3,4-乙撑二氧噻吩)∶聚(苯乙烯磺酸)(PEDOT∶PSS)导电非织造布存在导电性能不稳定和机械性能较差等问题,采用神经网络模型对PEDOT∶PSS导电非织造布进行性能优化。通过收集PEDOT∶PSS导电非织造布的试验数据,作为GA-BP神经网络的输入和输出,并建立针对PEDOT∶PSS导电聚合物配比的优化模型。结果表明:制备PEDOT∶PSS导电非织造布的最佳工艺参数为EDOT与PSS摩尔比例0.3345、过硫酸铵浓度0.0297 mol/L、硫酸铁浓度0.0487 mol/L、盐酸质量分数6.9630%,此时导电非织造布电导率为6.713 S/m,非织造布拉伸断裂强度为4.581 MPa。制备的PEDOT∶PSS导电非织造布经过20 min摩擦后,电导率由6.329 S/m下降到5.348 S/m;经过60 min水洗后电导率由6.536 S/m下降到5.435 S/m,且下降趋势缓慢。认为:所制备的导电非织造布具有良好的稳定性及耐用性。 展开更多
关键词 PEDOT∶pss导电非织造布 PEDOT∶pss配比优化 BP神经网络模型 遗传算法 多目标优化
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Dynamic ultrasonography for optimizing treatment position in superior mesenteric artery syndrome:Two case reports and review of literature
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作者 Nobuaki Hasegawa Akihiko Oka +4 位作者 Muyiwa Awoniyi Yuri Yoshida Hiroshi Tobita Norihisa Ishimura Shunji Ishihara 《World Journal of Gastroenterology》 SCIE CAS 2024年第5期499-508,共10页
BACKGROUND Superior mesenteric artery(SMA)syndrome is a rare cause of duodenal obstruction by extrinsic compression between the SMA and the aorta(SMA-Ao).Although the left lateral recumbent position is considered effe... BACKGROUND Superior mesenteric artery(SMA)syndrome is a rare cause of duodenal obstruction by extrinsic compression between the SMA and the aorta(SMA-Ao).Although the left lateral recumbent position is considered effective in the treatment of SMA syndrome,individual variations in the optimal patient position have been noted.In this report,we present two elderly cases of SMA syndrome that exhibited rapid recovery due to ultrasonographic dynamic evaluation of the optimal position for each patient.CASE SUMMARY Case 1:A 90-year-old man with nausea and vomiting.Following diagnosis of SMA syndrome by computed tomography(CT),ultrasonography(US)revealed the SMA-Ao distance in the supine position(4 mm),which slightly improved in the lateral position(5.7–7.0 mm)without the passage of duodenal contents.However,in the sitting position,the SMA-Ao distance was increased to 15 mm accompanied by improved content passage.Additionally,US indicated enhanced passage upon abdominal massage on the right side.By day 2,the patient could eat comfortably with the optimal position and massage.Case 2:An 87-year-old woman with vomiting.After the diagnosis of SMA syndrome and aspiration pneumonia by CT,dynamic US confirmed the optimal position(SMA-Ao distance was improved to 7 mm in forward-bent position,whereas it remained at 5 mm in the supine position).By day 7 when her pneumonia recovered,she could eat with the optimal position.CONCLUSION The optimal position for SMA syndrome varies among individuals.Dynamic US appears to be a valuable tool in improving patient outcomes. 展开更多
关键词 Superior mesenteric artery syndrome Wilkie’s syndrome Cast syndrome Aorto-mesenteric compass syndrome ULTRASONOGRAPHY Case report
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Hepatocardiorenal syndrome in liver cirrhosis:Recognition of a new entity?
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作者 Henry H L Wu Amina Rakisheva +1 位作者 Arvind Ponnusamy Rajkumar Chinnadurai 《World Journal of Gastroenterology》 SCIE CAS 2024年第2期128-136,共9页
Emerging evidence and perspectives have pointed towards the heart playing an important role in hepatorenal syndrome(HRS),outside of conventional understanding that liver cirrhosis is traditionally considered the sole ... Emerging evidence and perspectives have pointed towards the heart playing an important role in hepatorenal syndrome(HRS),outside of conventional understanding that liver cirrhosis is traditionally considered the sole origin of a cascade of pathophysiological mechanisms directly affecting the kidneys in this context.In the absence of established heart disease,cirrhotic cardiomyopathy may occur more frequently in those with liver cirrhosis and kidney disease.It is a specific form of cardiac dysfunction characterized by blunted contractile responsiveness to stress stimuli and altered diastolic relaxation with electrophysiological abnormalities.Despite the clinical description of these potential cardiac-related complications of the liver,the role of the heart has traditionally been an overlooked aspect of circulatory dysfunction in HRS.Yet from a physiological sense,temporality(prior onset)of cardiorenal interactions in HRS and positive effects stemming from portosystemic shunting demonstrated an important role of the heart in the development and progression of kidney dysfunction in cirrhotic patients.In this review,we discuss current concepts surrounding how the heart may influence the development and progression of HRS,and the role of systemic inflammation and endothelial dysfunction causing circulatory dysfunction within this setting.The temporality of heart and kidney dysfunction in HRS will be discussed.For a subgroup of patients who receive portosystemic shunting,the dynamics of cardiorenal interactions following treatment is reviewed.Continued research to determine the unknowns in this topic is anticipated,hopefully to further clarify the intricacies surrounding the liver-heart-kidney connection and improve strategies for management. 展开更多
关键词 Hepatorenal syndrome Cardiorenal syndrome CIRRHOSIS Cardiac dysfunction Circulatory dysfunction
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Fraser Syndrome: A Case Report
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作者 Chaimae Sajoura Mohammed Ech-Chebab +2 位作者 Anass Ayyad Sahar Messaoudi Rim Amrani 《Open Journal of Pediatrics》 2024年第3期476-481,共6页
Fraser syndrome is a rare malformative genetic syndrome whose main manifestations are cryptophthalmia, syndactyly, laryngeal atresia and urogenital malformations. We report the observation of a newborn from a non-cons... Fraser syndrome is a rare malformative genetic syndrome whose main manifestations are cryptophthalmia, syndactyly, laryngeal atresia and urogenital malformations. We report the observation of a newborn from a non-consanguineous marriage, admitted to the neonatology and neonatal intensive care unit at Day 1 of life for a poly-malformative syndrome. Clinically, the newborn presented with bilateral anophthalmia, cleft palate, dysmorphic facies with a rounded forehead, hypertelorism, micrognathia, low-set ears and a short neck, syndactility and bilateral cryptorchidism. Trans fontanellar ultrasound revealed tri ventricular hydrocephalus. Cerebral MRI angiography showed malformative tri-ventricular hydrocephalus, hypoplasia of the brainstem and cerebellum, and poly-microgyria. Transthoracic and renal ultrasonography were unremarkable, and the chest X-ray was normal. The authors discuss the malformative clinical and para-clinical aspects of this syndrome, multidisciplinary management and the importance of prenatal diagnosis. 展开更多
关键词 Fraser syndrome Cryptophthalmia NEWBORN Polymalformative syndrome
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Advancements in Lynch Syndrome Management: Applying Immunotherapy for Therapeutic Success
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作者 Abraamyan Feruza Bobolis Kristie Gauchan Dron 《Open Journal of Gastroenterology》 CAS 2024年第4期139-144,共6页
Lynch syndrome is the fourth most common cancer in the United States, with an early age of onset and poor prognosis. Here, we present a unique case of a patient with progressive colon cancer due to a late diagnosis of... Lynch syndrome is the fourth most common cancer in the United States, with an early age of onset and poor prognosis. Here, we present a unique case of a patient with progressive colon cancer due to a late diagnosis of Lynch syndrome showing excellent response to immunotherapy. A 59-year-old male with a history of rectal cancer 30 years ago came to the hospital due to a fever and further found a large necrotic colon mass. Biopsy was positive for colorectal cancer;however, due to the size of the tumor, the patient was deemed not a surgical candidate and offered hospice with palliative chemotherapy. Based on further workup, the patient was diagnosed with Lynch syndrome, with colon cancer determined to be responsive to Immunotherapy. He was started on JEMPERLI (Dosterlimab-gxly), and after three cycles of therapy, imaging and PET scan were repeated, showing decreased activity and extent of the tumor—a tremendous success. 展开更多
关键词 Lynch syndrome Colon Cancer GENETICS IMMUNOTHERAPY Dostarlimab
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Adherence to Pharmacotherapy in Post-Menopausal Women with Hypertension or Metabolic Syndrome: Real World Experience
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作者 Maria Maiello Francesca Amati +4 位作者 Vincenzo Ezio Santobuono Andrea Igoren Guaricci Cinzia Forleo Marco Matteo Ciccone Pasquale Palmiero 《International Journal of Clinical Medicine》 CAS 2024年第3期145-154,共10页
Background: Adherence to medications is dependent upon a variety of factors, including individual characteristics of the patient, interactions with health care providers, and medication complexity. Even though several... Background: Adherence to medications is dependent upon a variety of factors, including individual characteristics of the patient, interactions with health care providers, and medication complexity. Even though several studies were conducted to test intervention strategies, results are uncertain. Aim: The aim of the study is to assess if a tailored combined intervention strategy improves medication adherence in a large population of post-menopausal women affected by hypertension or metabolic syndrome. Methods: We enrolled 6833 patients aged 50 to 69 years, 85.7% with hypertension, and 14.3% with metabolic syndrome. A network between patients, general practitioners, and cardiologists was established. Interventions included education, adequate information to patients, a simplified scheme of treatment, and periodic adherence assessment. These were either delivered as healthcare provider supports or using modern technology. Medication adherence was estimated by the proportion of days covered for all classes of drugs after the index date. Results: Non-adherent hypertensive women were 297 (5%), and those with metabolic syndrome were 73 (7.4%) (p Conclusions: The rate of non-adherence in both settings of postmenopausal women was 7.7%, much lower than that described in the literature. This rate was increased in patients with metabolic syndrome;probably it is related to the complexity of the therapeutic scheme or to a poor consciousness of the disease. Therefore, implementing a tailored combined intervention can improve significantly patients’ adherence to medical therapy. 展开更多
关键词 ADHERENCE Cardiovascular Prevention Postmenopausal Women HYPERTENSIVE Metabolic syndrome
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Epidemiological, Clinical and Coronary Angiography Aspects of Acute Coronary Syndrome in the Cardiology Department of the Hospital Mother-Child “Le Luxembourg”Mali
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作者 Sidibé Samba Toure Mamadou +10 位作者 Konate Massama Sankaré Hamma Traoré Ousmane Mahamat Guire Sadik Diall Mahan Ameri Dicko Bahaide Daffe Sanoussy Keita Asmaou Thiam Coumba Adiaratou Diarra Soumaila Menta Ichaka 《World Journal of Cardiovascular Diseases》 CAS 2024年第4期228-233,共6页
Introduction: Cardiac catheterisation plays a fundamental role in the management of acute coronary syndrome. These explorations require heavy, complex and costly equipment and a large team of doctors, nurses and techn... Introduction: Cardiac catheterisation plays a fundamental role in the management of acute coronary syndrome. These explorations require heavy, complex and costly equipment and a large team of doctors, nurses and technicians with highly specialized training. Aims: To describe epidemiological, clinical and coronary angiography aspects of patients with acute coronary syndrome. Patients and Methods: Descriptive study from September 2019 to December 2023 in the Cardiology Department of the Hôpital Mère-Enfant of Bamako. Inclusion criteria were patients admitted for coronary angiography with the diagnosis of acute coronary syndrome. Results: During the study period, 1253 patients underwent coronary angiography, 596 of whom had acute coronary syndrome as an indication, representing a hospital frequency of 47%. Sex-ratio was 2.10. Mean age of patients was 58.5 ± 11.39 years. ST elevation acute coronary syndrome was the most common indication with 63.92% of cases. High blood pressure was the main cardiovascular risk factor with 58.7% of cases, and radial access approach was used in 98% of cases. Coronary angiography was pathological in 91.70% of cases (n = 548). Patients with lesions of anterior interventricular artery were 73.73% of cases. Tritruncal lesions accounted for 40.63% of cases. Conclusion: ST elevation acute coronary syndrome is the most frequent manifestation of acute coronary syndrome. Anterior interventricular artery is most often the culprit lesion for our patients. 展开更多
关键词 Coronary Angiography Acute Coronary syndrome BAMAKO MALI
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Clinical evolution of antisynthetase syndrome-associated interstitial lung disease after COVID-19 in a man with Klinefelter syndrome:A case report
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作者 Xiang-Xiang Wu Jian Cui +5 位作者 Shi-Yao Wang Tian-Tian Zhao Ya-Fei Yuan Long Yang Wei Zuo Wen-Jian Liao 《World Journal of Clinical Cases》 SCIE 2024年第6期1144-1149,共6页
BACKGROUND This study presents a case of rapidly developing respiratory failure due to antisynthetase syndrome(AS)following coronavirus disease 2019(COVID-19)in a 33-year-old man diagnosed with Klinefelter syndrome(KS... BACKGROUND This study presents a case of rapidly developing respiratory failure due to antisynthetase syndrome(AS)following coronavirus disease 2019(COVID-19)in a 33-year-old man diagnosed with Klinefelter syndrome(KS).CASE SUMMARY A 33-year-old man with a diagnosis of KS was admitted to the Department of Pulmonary and Critical Care Medicine of a tertiary hospital in China for fever and shortness of breath 2 wk after the onset of COVID-19.Computed tomography of both lungs revealed diffuse multiple patchy heightened shadows in both lungs,accompanied by signs of partial bronchial inflation.Metagenomic next-generation sequencing of the bronchoalveolar lavage fluid suggested absence of pathogen.A biopsy specimen revealed organizing pneumonia with alveolar septal thickening.Additionally,extensive auto-antibody tests showed strong positivity for anti-SSA,anti-SSB,anti-Jo-1,and anti-Ro-52.Following multidisciplinary discussions,the patient received a final diagnosis of AS,leading to rapidly progressing respiratory failure.CONCLUSION This study underscores the clinical progression of AS-associated interstitial lung disease subsequent to viral infections such as COVID-19 in patients diagnosed with KS. 展开更多
关键词 Antisynthetase syndrome COVID-19 Klinefelter syndrome Interstitial lung disease Anti-Jo-1 Case report
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Outcomes of combined mitochondria and mesenchymal stem cellsderived exosome therapy in rat acute respiratory distress syndrome and sepsis
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作者 Kun-Chen Lin Wen-Feng Fang +5 位作者 Jui-Ning Yeh John Y Chiang Hsin-Ju Chiang Pei-Lin Shao Pei-Hsun Sung Hon-Kan Yip 《World Journal of Stem Cells》 SCIE 2024年第6期690-707,共18页
BACKGROUND The treatment of acute respiratory distress syndrome(ARDS)complicated by sepsis syndrome(SS)remains challenging.AIM To investigate whether combined adipose-derived mesenchymal-stem-cells(ADMSCs)-derived exo... BACKGROUND The treatment of acute respiratory distress syndrome(ARDS)complicated by sepsis syndrome(SS)remains challenging.AIM To investigate whether combined adipose-derived mesenchymal-stem-cells(ADMSCs)-derived exosome(EXAD)and exogenous mitochondria(mitoEx)protect the lung from ARDS complicated by SS.METHODS In vitro study,including L2 cells treated with lipopolysaccharide(LPS)and in vivo study including male-adult-SD rats categorized into groups 1(sham-operated-control),2(ARDS-SS),3(ARDS-SS+EXAD),4(ARDS-SS+mitoEx),and 5(ARDS-SS+EXAD+mitoEx),were included in the present study.RESULTS In vitro study showed an abundance of mitoEx found in recipient-L2 cells,resulting in significantly higher mitochondrial-cytochrome-C,adenosine triphosphate and relative mitochondrial DNA levels(P<0.001).The protein levels of inflammation[interleukin(IL)-1β/tumor necrosis factor(TNF)-α/nuclear factor-κB/toll-like receptor(TLR)-4/matrix-metalloproteinase(MMP)-9/oxidative-stress(NOX-1/NOX-2)/apoptosis(cleaved-caspase3/cleaved-poly(ADP-ribose)polymerase)]were significantly attenuated in lipopolysaccharide(LPS)-treated L2 cells with EXAD treatment than without EXAD treatment,whereas the protein expressions of cellular junctions[occluding/β-catenin/zonula occludens(ZO)-1/E-cadherin]exhibited an opposite pattern of inflam-mation(all P<0.001).Animals were euthanized by 72 h post-48 h-ARDS induction,and lung tissues were harvested.By 72 h,flow cytometric analysis of bronchoalveolar lavage fluid demonstrated that the levels of inflam-matory cells(Ly6G+/CD14+/CD68+/CD11b/c+/myeloperoxidase+)and albumin were lowest in group 1,highest in group 2,and significantly higher in groups 3 and 4 than in group 5(all P<0.0001),whereas arterial oxygen-saturation(SaO2%)displayed an opposite pattern of albumin among the groups.Histopathological findings of lung injury/fibrosis area and inflammatory/DNA-damaged markers(CD68+/γ-H2AX)displayed an identical pattern of SaO2%among the groups(all P<0.0001).The protein expressions of inflammatory(TLR-4/MMP-9/IL-1β/TNF-α)/oxidative stress(NOX-1/NOX-2/p22phox/oxidized protein)/mitochondrial-damaged(cytosolic-cytochrome-C/dynamin-related protein 1)/autophagic(beclin-1/Atg-5/ratio of LC3B-II/LC3B-I)biomarkers exhibited a similar manner,whereas antioxidants[nuclear respiratory factor(Nrf)-1/Nrf-2]/cellular junctions(ZO-1/E-cadherin)/mitochondrial electron transport chain(complex I-V)exhibited an opposite manner of albumin among the groups(all P<0.0001).CONCLUSION Combined EXAD-mitoEx therapy was better than merely one for protecting the lung against ARDS-SS induced injury. 展开更多
关键词 Acute respiratory distress syndrome Sepsis syndrome EXOSOMES MITOCHONDRIA Adipose tissue-derived mesenchymal stem cells INFLAMMATION
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Clinical features and possible pathogenesis of multiple evanescent white dot syndrome with different retinal diseases and events:a narrative review
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作者 Chun-Li Chen Yi-Zhe Cheng +2 位作者 Zhi-Han Zhang Ge Wang Xiao-Yan Peng 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第3期583-595,共13页
●Multiple evanescent white dot syndrome(MEWDS)is a rare fundus disease,characterized by acute vision loss and visual field defects.Many previous studies have explained the possible pathogenesis and clinical features ... ●Multiple evanescent white dot syndrome(MEWDS)is a rare fundus disease,characterized by acute vision loss and visual field defects.Many previous studies have explained the possible pathogenesis and clinical features of primary MEWDS.However,as the number of reported cases increases,secondary MEWDS occurs in other related retinal diseases and injuries,exhibiting some special characteristics.The associated retinal diseases include multifocal choroiditis/punctate inner choroidopathy(MFC/PIC),acute zonal occult outer retinopathy,best vitelliform macular dystrophy,pseudoxanthoma elasticum,and ocular toxoplasmosis.The related retinal injury is laser photocoagulation,surgery,and trauma.Although primary MEWDS often have a self-limiting course,secondary MEWDS may require treatment in some cases,according to the severity of concomitant diseases and complications.Notably,MEWDS secondary to MFC/PIC that is prone to forming choroidal neovascularization and focal choroidal excavation,needs positive treatment with corticosteroids.The possible underlying pathogenesis of secondary MEWDS is the exposure of choroidal antigen after the disruption of Bruch’s membrane.The MEWDS-related features in secondary MEWDS are still evanescent under most circumstances.Its prognosis and treatment depend on the severity of complications.Current studies propose that the etiology is associated with immune factors,including viral infection,inflammation in choroid and Bruch’s membrane,and antigen exposure caused by retinal and/or choroidal insults.More pathogenic studies should be conducted in the future.Accurate diagnosis for secondary MEWDS could benefit patients in aspects of management and prognosis. 展开更多
关键词 multiple evanescent white dot syndrome punctate inner choroidopathy multifocal choroiditis secondary multiple evanescent white dot syndrome
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Nasogastric tube syndrome:A Meta-summary of case reports
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作者 Deven Juneja Prashant Nasa +1 位作者 Gunjan Chanchalani Ravi Jain 《World Journal of Clinical Cases》 SCIE 2024年第1期119-129,共11页
BACKGROUND Since its description in 1790 by Hunter,the nasogastric tube(NGT)is commonly used in any healthcare setting for alleviating gastrointestinal symptoms or enteral feeding.However,the risks associated with its... BACKGROUND Since its description in 1790 by Hunter,the nasogastric tube(NGT)is commonly used in any healthcare setting for alleviating gastrointestinal symptoms or enteral feeding.However,the risks associated with its placement are often underes-timated.Upper airway obstruction with a NGT is an uncommon but potentially life-threatening complication.NGT syndrome is characterized by the presence of an NGT,throat pain and vocal cord(VC)paralysis,usually bilateral.It is poten-tially life–threatening,and early diagnosis is the key to the prevention of fatal upper airway obstruction.However,fewer cases may have been reported than might have occurred,primarily due to the clinicians'unawareness.The lack of specific signs and symptoms and the inability to prove temporal relation with NGT insertion has made diagnosing the syndrome quite challenging.AIM To review and collate the data from the published case reports and case series to understand the possible risk factors,early warning signs and symptoms for timely detection to prevent the manifestation of the complete syndrome with life-threatening airway obstruction.METHODS We conducted a systematic search for this meta-summary from the database of PubMed,EMBASE,Reference Citation Analysis(https://www.referencecitation-analysis.com/)and Google scholar,from all the past studies till August 2023.The search terms included major MESH terms"Nasogastric tube","Intubation,Gastrointestinal","Vocal Cord Paralysis",and“Syndrome”.All the case reports and case series were evaluated,and the data were extracted for patient demographics,clinical symptomatology,diagnostic and therapeutic interventions,clinical course and outcomes.A datasheet for evaluation was further prepared.RESULTS Twenty-seven cases,from five case series and 13 case reports,of NGT syndrome were retrieved from our search.There was male predominance(17,62.96%),and age at presentation ranged from 28 to 86 years.Ten patients had diabetes mellitus(37.04%),and nine were hypertensive(33.33%).Only three(11.11%)patients were reported to be immunocompromised.The median time for developing symptoms after NGT insertion was 14.5 d(interquartile range 6.25-33.75 d).The most commonly reported reason for NGT insertion was acute stroke(10,37.01%)and the most commonly reported symptoms were stridor or wheezing 17(62.96%).In 77.78%of cases,bilateral VC were affected.The only treatment instituted in most patients(77.78%)was removing the NG tube.Most patients(62.96%)required tracheostomy for airway protection.But 8 of the 23 survivors recovered within five weeks and could be decannulated.Three patients were reported to have died.CONCLUSION NGT syndrome is an uncommon clinical complication of a very common clinical procedure.However,an under-reporting is possible because of misdiagnosis or lack of awareness among clinicians.Patients in early stages and with mild symptoms may be missed.Further,high variability in the presentation timing after NGT insertion makes diagnosis challenging.Early diagnosis and prompt removal of NGT may suffice in most patients,but a significant proportion of patients presenting with respiratory compromise may require tracheostomy for airway protection. 展开更多
关键词 Nasogastric tube Nasogastric tube syndrome Ryle’s tube Sofferman syndrome Vocal cord paralysis
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Acute Coronary Syndrome of Young Subjects at the Luxembourg Mother-Child University Hospital in Bamako
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作者 Mamadou Toure Mariam Dagnogo +15 位作者 Massama Konate Mariam Sako Daouda Fofana Hamma Sankare Almou A. Diall Modibo Doumbia Baba I. Diarr Mady Sow Abdoul Wahhab Terra Coumba A. Thiam Boubacar Sonfo Boubacar Diarra Asmaou Keita Ousmane Traore Hamidou O. Ba Ichaka Menta 《World Journal of Cardiovascular Diseases》 CAS 2024年第3期157-165,共9页
Introduction: Acute coronary syndrome is often the first event of coronary disease of young subjects. Objective: To study sociodemographic, clinical, paraclinical, therapeutic and evolutionary aspects of acute coronar... Introduction: Acute coronary syndrome is often the first event of coronary disease of young subjects. Objective: To study sociodemographic, clinical, paraclinical, therapeutic and evolutionary aspects of acute coronary syndrome of young subjects. Patients and Methods: Descriptive cross-sectional study with prospective recruitment from October 01, 2020 to March 31, 2022. Were included all patients admitted for acute coronary syndrome whose age was less or equal to 45 years and who had undergone coronary angiography at the Mother-Child University Hospital on Luxembourg from Bamako. Results: During the study period, we collected 60 patient files out of 198. These 60 patient files met our inclusion criteria. Hospital frequency was 30.30%. Average age of patients was 40.43 ± 3.9 years. Sex ratio M/F was 5.3. Main cardiovascular risk factor was smoking tobacco (23.42%), followed by dyslipidemia (13.92%). Functional signs were dominated by angina 62% followed by dyspnea 25.3%. Persistent ST-segment elevation on electrocardiogram was present in 76.4%. Left ventricular systolic dysfunction was present in 26.5%. Time to first medical contact was more than 12 hours in 62.7% of cases. Radial approach was adopted in 94% of cases. Coronary angiography was pathological in 85% (n = 51) of cases. Lesions were single-vessel disease in 47.1% and culprit artery was anterior interventricular in 51% of cases. Dual anti-platelet aggregation was aspirin and ticagrelor in 91.8% of cases. Angioplasty was performed in all patients who had significant abnormalities at coronary angiography. In-hospital mortality was 3.9%. Conclusion: Acute coronary syndromes exist in young Africans with a male predominance. Main cardiovascular risk factor is smoking tobacco. Coronary lesions are single vessel disease in the majority of case. Most of patients meet medical team after 12 hours. Time to first medical contact is a main challenge in our country. 展开更多
关键词 Acute Coronary syndrome Young Subjects Coronary Angiography CHU Luxembourg BAMAKO
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Dunbar Syndrome and Hypoxic Hepatitis: An Unusual Presentation
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作者 Hajar Cherkaoui Ismail Chaouech +12 位作者 Yousra El Abidi Haroun Robleh Asmae Lamine Maria Lahlali Nada Lahmidani Amine Mekkaoui Mounia Elyousfi Dafr Allah Benajah Adil Ibrahimi Mohammed El Abkari Nizar Bouardi Mohammed Maaroufi Hakima Abid 《Open Journal of Gastroenterology》 CAS 2024年第6期226-232,共7页
Hypoxic hepatitis, also known as ischemic hepatitis, is characterized by acute hepatocellular injury due to inadequate oxygen delivery to the liver. Celiac trunk stenosis can lead to hepatic ischemia and subsequent li... Hypoxic hepatitis, also known as ischemic hepatitis, is characterized by acute hepatocellular injury due to inadequate oxygen delivery to the liver. Celiac trunk stenosis can lead to hepatic ischemia and subsequent liver damage. We present the case of an 81-year-old patient with a history of hypertension, ischemic heart disease, hypothyroidism, and biliary lithiasis, who developed hypoxic hepatitis secondary to Dunbar syndrome and a stenosis of the superior mesenteric artery. The patient improved symptoms and liver function tests with conservative management, including intravenous fluids and supportive care. Long-term management involved continued antiplatelet therapy and statins, with consideration of further interventions for celiac trunk stenosis. This case underscores the importance of recognizing Dunbar syndrome as well as superior mesentery trunk stenosis as a potential cause of hypoxic hepatitis. It highlights the need for multidisciplinary management in such cases. 展开更多
关键词 Dunbar syndrome Hypoxic Hepatitis Stenosis of Mesentery Artery
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A Budd-Chiari Syndrome Due to C Protein Deficiency: A Case Report at YaoundéGeneral Hospital (Cameroon)
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作者 Antonin Wilson Ndjitoyap Ndam Gilles Gael Aghoagni Gouajio +5 位作者 Armel Awana Tenone Danah Larry Tangie Ngek Mathurin Kowo Firmin Andoulo Ankouane Elie Claude Ndjitoyap Ndam 《Open Journal of Gastroenterology》 CAS 2024年第4期117-124,共8页
Primary Budd-Chiari syndrome (BCS) is a spontaneously fatal disease characterized by an obstruction of the hepatic venous outflow tract due to thrombosis or a primary disease of the venous wall. The primary form of BC... Primary Budd-Chiari syndrome (BCS) is a spontaneously fatal disease characterized by an obstruction of the hepatic venous outflow tract due to thrombosis or a primary disease of the venous wall. The primary form of BCS is extremely rare. This is a disease mainly affecting young adults of both sexes. Clinical manifestations are variable;they can be asymptomatic, acute, or subacute but mostly chronic. Several causes have been identified, such as myeloproliferative syndrome, antiphospholipid syndrome, paroxysmal nocturnal hemoglobinuria, and inherited thrombotic disorders. Data on primary BCS in Sub-Saharan Africa is rare as most publications available are case reports. In these reports, the causes are unknown with poor prognosis in most cases often leading to patient death. We herein present a case report of a male patient diagnosed with a primary BCS at Yaoundé General Hospital (Cameroon) caused by a Protein C deficiency who presented with ascites decompensating liver cirrhosis. Treatment was based on anticoagulants, diuretics and laxatives administration. Two years after the diagnosis, the patient is alive with clinical and paraclinical improvement. 展开更多
关键词 Budd-Chiari syndrome Hepatic Veins Liver Cirrhosis Protein C Deficiency Cameroon
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