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Comparative Efficacy of Lifestyle Modifications versus Pharmacotherapy on Weight Loss and Metabolic Health Outcomes: A Comprehensive Review
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作者 Abiodun Omolara Aboaba Miracle Chinonso Okoro +6 位作者 Okelue Edwards Okobi Ifeoluwa Mary Falade Omosefe Enibokun Ogbeifun Shalom Katas Kingsley Agbodike Uvieroghene Peter Ogbebor Moriamo Adedoyin Fashugba 《Journal of Biosciences and Medicines》 2024年第7期17-29,共13页
Background: Obesity has become a serious global public health challenge, given that it leads to various adverse health outcomes that include cardiovascular illnesses, diabetes, and certain types of cancer. The World H... Background: Obesity has become a serious global public health challenge, given that it leads to various adverse health outcomes that include cardiovascular illnesses, diabetes, and certain types of cancer. The World Health Organization (WHO) has estimated that, at the end of 2022, 1 out of every 8 individuals were obese, and that the global adult obesity rates have over doubled since 1990, even as the adolescent obesity rates have quadrupled. Thus, as of 2022, nearly 2.5 billion adults, aged 18 years and above, were overweight, with 890 million being obese. Obesity and overweight incidence rate has been gradually increasing over the years, presenting significant challenges to the healthcare systems throughout the globe. In this regard, the objective of this systematic review was to evaluate the effectiveness and safety of lifestyle modifications (diet and physical activity) and pharmacotherapy in promoting weight loss and improving metabolic health in overweight adults. Methodology: To attain the above stated study objective, a systematic evaluation of previous studies was carried out, particularly studies that assessed the effectiveness and safety of lifestyle modifications (diet and physical activity) and pharmacotherapy in promoting weight loss and improving metabolic health in overweight adults. The authors have used the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) in the selection of eligible studies for inclusion in the study. Results: The findings indicate that lifestyle interventions resulted in 5% - 10% weight reduction and significant improvements in metabolic indicators, while pharmacotherapy (GLP-1 receptor agonists) achieved up to 15% weight reduction and considerable metabolic health benefits. Further, comparative studies show lifestyle modifications provide overall health benefits, while medication is necessary for non-responders. Conclusion: Individualized treatment strategies are crucial, and further research is needed on long-term consequences and combination therapies. 展开更多
关键词 OBESITY OVERWEIGHT Weight Loss pharmacotherapy Glucose Metabolism Disorders
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Strengthening pharmacotherapy research for COVID-19-induced pulmonary fibrosis
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作者 Yan-Miao Liu Jing Zhang +2 位作者 Jing-Jing Wu Wei-Wei Guo Fu-Shan Tang 《World Journal of Clinical Cases》 SCIE 2024年第5期875-879,共5页
The global spread of severe acute respiratory syndrome coronavirus 2 has resulted in a significant number of individuals developing pulmonary fibrosis(PF),an irreversible lung injury.This condition can manifest within... The global spread of severe acute respiratory syndrome coronavirus 2 has resulted in a significant number of individuals developing pulmonary fibrosis(PF),an irreversible lung injury.This condition can manifest within a short inter-val following the onset of pneumonia symptoms,sometimes even within a few days.While lung transplantation is a potentially lifesaving procedure,its limited availability,high costs,intricate surgeries,and risk of immunological rejection present significant drawbacks.The optimal timing of medication administration for coronavirus disease 2019(COVID-19)-induced PF remains controversial.Despite this,it is crucial to explore pharmacotherapy interventions,involving early and preventative treatment as well as pharmacotherapy options for advanced-stage PF.Additionally,studies have demonstrated disparities in anti-fibrotic treatment based on race and gender factors.Genetic mutations may also impact therapeutic efficacy.Enhancing research efforts on pharmacotherapy interventions,while considering relevant pharmacological factors and optimizing the timing and dosage of medication administration,will lead to enhanced,personalized,and fair treatment for individuals impacted by COVID-19-related PF.These measures are crucial in lessening the burden of the disease on healthcare systems and improving patients'quality of life. 展开更多
关键词 COVID-19 Pulmonary fibrosis pharmacotherapy intervention Medication administration TIMING DOSAGE
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Interest of Transcranial Doppler (TCD) in Emergency in Traumatic Brain Injury Patients at Gabriel Touré University Hospital, Bamako, Mali
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作者 Abdoulhamidou Almeimoune Moustapha Mangane +8 位作者 Madane Thierno Diop Mahamadoun Coulibaly Amadou Gamby Dramane Sanogo Alfousseini Soumare Adama Coulibaly Ababacar Salaha Harouna Sangaré Diango Djibo Mahamane 《Open Journal of Emergency Medicine》 2024年第3期114-121,共8页
Introduction: Transcranial Doppler is a simple, non-invasive and inexpensive examination which allows the assessment of cerebral perfusion. In countries with limited resources, which do not have a means of monitoring ... Introduction: Transcranial Doppler is a simple, non-invasive and inexpensive examination which allows the assessment of cerebral perfusion. In countries with limited resources, which do not have a means of monitoring intracranial pressure, this examination offers hope of survival for patients with traumatic brain injury. This study was designed to investigate the incidence of early cerebral circulation abnormalities after traumatic brain injury using transcranial Doppler (TCD). Methodology: A descriptive and analytical study was conducted over one year, including patients with traumatic brain injury and an initial Glasgow Coma Scale (GCS) score of less than 15. Non-inclusion criteria: Stroke, brain tumor, cerebral abscess. Exclusion criteria: Inadequate insonation window. Results: Out of 854 traumatic brain injury patients admitted to the emergency department, 112 were included in the study. The average age was 30.14 years, with a sex ratio of 4.1. Initially, 83.5% had moderate traumatic brain injury, and 12.1% had severe traumatic brain injury. Brain CT scans were performed in 95.7% of the patients. Edematous-hemorrhagic contusion was observed in 95% of the patients. On initial TCD, the pulsatility index in the middle cerebral artery was greater than 1.3 in 49.4% of the patients. Diastolic velocity was less than 20 cm/s in 46.4% of cases, and mean velocity was greater than 150 cm/s in 8.7% of cases. In this group, low diastolic velocity indicated cerebral hypoperfusion suggestive of intracranial hypertension. When the pulsatility index was greater than 1.9, no patient had a normal diastolic velocity. Among patients with severe traumatic brain injury, 61.5% had an abnormal pulsatility index compared to 42.3% of patients with moderate traumatic brain injury. Conclusion: TCD is a simple tool for analyzing intracerebral hemodynamics. 展开更多
关键词 Traumatic Brain Injury tcd Neuroresuscitation Sub-Saharan Africa
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超声联合TCD技术诊断颈部动脉粥样硬化性脑梗死的临床价值
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作者 李新勇 《现代医用影像学》 2024年第3期533-535,539,共4页
目的:探讨超声联合TCD技术诊断颈部动脉粥样硬化性脑梗死(CAEI)的临床价值。方法:以62例CAEI患者为对象,以同期62例健康人为对照组。均接受血管超声及TCD检查,分析二者诊断CAEI的价值。结果:观察组颈总动脉收缩期内径(Ds)、内中膜厚度(I... 目的:探讨超声联合TCD技术诊断颈部动脉粥样硬化性脑梗死(CAEI)的临床价值。方法:以62例CAEI患者为对象,以同期62例健康人为对照组。均接受血管超声及TCD检查,分析二者诊断CAEI的价值。结果:观察组颈总动脉收缩期内径(Ds)、内中膜厚度(IMT)值高于对照组(P<0.05)。观察组Vd、Vs低于对照组,RI、PI高于对照组(P<0.05)。观察组斑块检出率为85.48%,高于对照组(19.35%,P<0.05)。模型1(Ds+IMT)诊断CAEI的AUC、灵敏度、特异度分别为0.754(95%CI:0.669-0.827)、79.03%、74.19%;模型2(Vs+Vd+RI+PI)诊断CAEI的AUC、灵敏度、特异度分别为0.814(95%CI:0.735-0.878)、82.26%、70.97%;模型3(Ds+IMT+Vs+Vd+RI+PI)诊断CAEI的AUC、灵敏度、特异度分别为0.871(95%CI:0.799-0.924)、90.32%、74.19%。模型3诊断CAEI的AUC高于模型1、模型2(P<0.05)。结论:超声联合TCD检测可了解CAEI患者的颈动脉斑块及血流信息,有助于提高诊断的准确度。 展开更多
关键词 超声 tcd 颈部动脉粥样硬化性脑梗死
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TCD监测颅内血流动力学参数评估脑血管病患者颈动脉狭窄程度及神经功能恶化的风险 被引量:2
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作者 杨茹 王明玉 +3 位作者 任孝林 董青 籍牛 周芯羽 《中国老年学杂志》 CAS 北大核心 2023年第21期5135-5138,共4页
目的探讨经颅射绝超声多普勒系统(TCD)监测颅内血流动力学对脑血管病患者颈动脉狭窄严重程度和神经功能恶化风险的评估价值。方法前瞻性纳入122例脑血管病患者为病例组,根据患者颈动脉狭窄程度分为轻度狭窄组(n=43)、中度狭窄组(n=47)... 目的探讨经颅射绝超声多普勒系统(TCD)监测颅内血流动力学对脑血管病患者颈动脉狭窄严重程度和神经功能恶化风险的评估价值。方法前瞻性纳入122例脑血管病患者为病例组,根据患者颈动脉狭窄程度分为轻度狭窄组(n=43)、中度狭窄组(n=47)、重度狭窄组(n=32),并纳入同期健康体检者60例为对照组,比较4组颅内血流动力学指标,并采用Pearson分析其与患者颈动脉狭窄严重程度的相关性;根据患者神经功能恶化程度分为神经功能恶化组(n=55)和神经功能未恶化组(n=67),采用单因素和多因素Logistic回归分析明确影响患者发生神经功能恶化的高危因素,并采用受试者工作特征(ROC)曲线进一步分析独立危险因素对神经功能恶化的诊断效能。结果轻、中、重度狭窄组舒张期峰值血流速度(EDV)、收缩期峰值血流速度(PSV)及平均血流速度(MV)水平均较对照组偏低,搏动指数(PI)和阻力指数(RI)较对照组偏高,有统计学差异(P<0.05);重度狭窄组PSV、MV、EDV水平较轻、中度狭窄组显著偏低,PI及RI水平显著偏高(P<0.05)。Pearson相关性分析结果显示,PSV、EDV及MV与颈动脉狭窄程度呈显著正相关(r=0.541,0.763,0.822,均P<0.05),PI及RI与颈动脉狭窄程度呈显著负相关(r=-0.133,-0.375,均P<0.05)。神经功能恶化组平均年龄、入院GCS评分、ICU停留时间及住院时长等临床指标均明显高于神经功能未恶化组(P<0.05);两组大脑中动脉血流动力学参数对比,神经功能恶化组收缩期血流速度(FVs)、PI显著高于神经功能未恶化组,FVd、平均流速(FVm)明显低于神经功能未恶化组(P<0.05)。Logistic回归分析结果显示,ICU停留时间、住院时间、FVs、舒张期血流速度(FVd)、PI均是影响脑血管病患者神经功能恶化的独立危险因素(P<0.05)。ROC曲线分析结果显示,FVs、FVd、FVm及PI对预测脑血管病患者发生神经功能的ROC曲线下面积(AUC)分别为0.643、0.834、0.336、0.866(均P<0.05)。诊断效能:PI>FVd>FVs>FVm。结论应用TCD对脑血管病患者颅内血流动力学参数进行监测可辅助临床评估患者的颈动脉狭窄程度,对此类患者发生神经功能病变具有较高的预测价值。 展开更多
关键词 tcd监测 颅内血流动力学 脑血管病 颈动脉狭窄 神经功能恶化
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Pharmacotherapy in autism spectrum disorders,including promising older drugs warranting trials 被引量:2
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作者 Jessica Hellings 《World Journal of Psychiatry》 SCIE 2023年第6期262-277,共16页
Available pharmacotherapies for autism spectrum disorders(ASD)are reviewed based on clinical and research experience,highlighting some older drugs with emerging evidence.Several medications show efficacy in ASD,though... Available pharmacotherapies for autism spectrum disorders(ASD)are reviewed based on clinical and research experience,highlighting some older drugs with emerging evidence.Several medications show efficacy in ASD,though controlled studies in ASD are largely lacking.Only risperidone and aripiprazole have Federal Drug Administration approval in the United States.Methylphenidate(MPH)studies showed lower efficacy and tolerability for attention deficit hyperactivity disorder(ADHD)than in the typically developing(TD)population;atomoxetine demonstrated lower efficacy but comparable tolerability to TD outcomes.Guanfacine improved hyperactivity in ASD comparably to TD.Dextroamphetamine promises greater efficacy than MPH in ASD.ADHD medications reduce impulsive aggression in youth,and may also be key for this in adults.Controlled trials of the selective serotonin reuptake inhibitors citalopram and fluoxetine demonstrated poor tolerability and lack of efficacy for repetitive behaviors.Trials of antiseizure medications in ASD remain inconclusive,however clinical trials may be warranted in severely disabled individuals showing bizarre behaviors.No identified drugs treat ASD core symptoms;oxytocin lacked efficacy.Amitriptyline and loxapine however,show promise.Loxapine at 5-10 mg daily resembled an atypical antipsychotic in positron emission tomography studies,but may be weight-sparing.Amitriptyline at approximately 1 mg/kg/day used cautiously,shows efficacy for sleep,anxiety,impulsivity and ADHD,repetitive behaviors,and enuresis.Both drugs have promising neurotrophic properties. 展开更多
关键词 AUTISM pharmacotherapy Dextroamphetamine Loxapine AMITRIPTYLINE Minimally verbal NEUROTROPHIC
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TCD发泡试验在诊断隐源性脑卒中相关危险因素PFO中的应用研究
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作者 黄丽霞 鲍云 +2 位作者 邵玉薇 刘竞芳 董轩 《中文科技期刊数据库(引文版)医药卫生》 2023年第2期106-108,共3页
研究TCD发泡试验在隐源性脑卒中中相关危险因素PFO应用效果开展诊断评估。方法 选择我院2019-2023年所接受到的80名隐源性脑卒中患者为分析对象,比较患者经颅多普勒超声(TCD)发泡试验和经胸心脏超声心动图(TTE)检查结果阳性率和影像学... 研究TCD发泡试验在隐源性脑卒中中相关危险因素PFO应用效果开展诊断评估。方法 选择我院2019-2023年所接受到的80名隐源性脑卒中患者为分析对象,比较患者经颅多普勒超声(TCD)发泡试验和经胸心脏超声心动图(TTE)检查结果阳性率和影像学特征。结果 TCD发泡试验在隐源性脑卒中相关危险因素卵圆孔未闭(PFO)阳性率检出率和TTE阳性检出率检查方面,检查具备统计学意义。在TCD发泡试验对隐源性脑卒中脑卒中相关危险因素中PFO阳性和阴性患者检查内,阳性患者梗死病大部分出现在皮层、皮层下区域,阴性患者主要出现深部灰质区域。结论 TCD发泡试验可以有效检测出由于PFO该危险因素造成隐源性脑卒中,PFO阳性病灶大部分位于皮层、皮层下区域,就隐源性脑卒中相关危险因素PFO筛查、诊断、病因研究等角度具备关键意义,适宜临床推广与应用。 展开更多
关键词 tcd发泡试验 隐源性脑卒中 PFO 影像学特点
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Tranexamic acid may be a useful pharmacotherapy for endoscopically resistant small bowel angiodysplasia
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作者 Shunji Fujimori 《World Journal of Gastroenterology》 SCIE CAS 2023年第7期1131-1138,共8页
Small bowel angiodysplasia(SBAD)is reported to account for nearly 50%of cases of small bowel bleeding.When SBAD occurs frequently,it is difficult to treat all the angiodysplasias endoscopically,and gastrointestinal bl... Small bowel angiodysplasia(SBAD)is reported to account for nearly 50%of cases of small bowel bleeding.When SBAD occurs frequently,it is difficult to treat all the angiodysplasias endoscopically,and gastrointestinal bleeding often recurs.Hormone therapy,somatostatin analogs,thalidomide and vascular endothelial growth factor(VEGF)-neutralizing antibodies have been reported to reduce gastrointestinal angiodysplasia(GIAD)bleeding.However,there is no strong evidence to recommend them.Also,there are no guidelines for their use.Hereditary hemorrhagic telangiectasia(HHT)is a hereditary disease caused by abnormalities in VEGF,resulting in multiple GIADs.A treatment guideline has been created for GIAD in HHT,and the use of tranexamic acid,an antifibrinolytic agent,is the first recommendation pharmacotherapy for GIAD with gastrointestinal bleeding that is difficult to treat endoscopically.It has been reported that fibrinolysis is accelerated in GIAD patients who are not HHT,similar to HHT patients.The use of tranexamic acid for gastric antral vascular ectasia in GIAD has been reported to be useful.However,there are very few reports of its use for SBAD.There are concerns with tranexamic acid use regarding the development of thrombosis/embolism,but there are few reports of such side effects.Future clinical trials including tranexamic acid for SBAD are desired. 展开更多
关键词 ANGIODYSPLASIA INTESTINE Hereditary hemorrhagic telangiectasia Tranexamic acid Endoscopic treatment pharmacotherapy
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TCD发泡试验在卵圆孔未闭中的应用
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作者 陈立侠 《中国科技期刊数据库 医药》 2023年第12期1-4,共4页
对卵圆孔未闭采用TCD发泡实验,做好效果分析。方法 通过选取本院收治的隐源性卒中患者42例,患者在入院后进行MRI以及CT检查,采用TCD发泡实验,做好阳性率情况的比较。结果 通过对42例患者进行检查,其中阳性率为88.4%。卵圆孔直径在1-3mm... 对卵圆孔未闭采用TCD发泡实验,做好效果分析。方法 通过选取本院收治的隐源性卒中患者42例,患者在入院后进行MRI以及CT检查,采用TCD发泡实验,做好阳性率情况的比较。结果 通过对42例患者进行检查,其中阳性率为88.4%。卵圆孔直径在1-3mm之间。结论 对卵圆孔未闭采用TCD发泡实验,能够更好的探查卒中,明确隐源性脑梗的发生概率,整体效果良好,为患者预后提供一定基础。 展开更多
关键词 tcd发泡试验 卵圆孔未闭 应用
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TCD5 Enhances the Photosynthesis Capacity,Increases the Panicle Number and the Yield in Rice
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作者 Jing Yang Yufeng Wang +3 位作者 Zhanghua Hu Xiaoping Chen Yanjun Dong Sheng Teng 《Phyton-International Journal of Experimental Botany》 SCIE 2023年第9期2649-2663,共15页
Improvement of photosynthetic efficiency is a major approach to increase crop yield potential.Previously,we cloned a gene encoding the chloroplast-located putative monooxygenase TCD5,which is essential in plastid deve... Improvement of photosynthetic efficiency is a major approach to increase crop yield potential.Previously,we cloned a gene encoding the chloroplast-located putative monooxygenase TCD5,which is essential in plastid development under low temperature in rice(Oryza sativa L.).In this study,the effects of TCD5 on the photosynthesis and the yields were investigated in rice.Two sets of genetic materials with three levels of TCD5 expression,including tcd5 mutant or TCD5 RNAi transgenic lines and TCD5 over-expression transgenic lines in Jiahua1 and Nipponbare backgrounds,were used in the field trails of multi-locations and multi-years.TCD5 positively affected the panicle number and the yield at dosage.Compared with the wild-types,the panicle numbers were 12.4%-14.6%less in tcd5 mutant and 8.3%-38.6%less in TCD5 RNAi lines,but 26.2%-61.8%more in TCD5 over-expression lines.The grain yields per plant were 9.1%-18.4%less in tcd5 mutant and 14.3%-56.7%less in TCD5 RNAi lines,but 6.9%-56.5%more in TCD5 over-expression lines.The measurements of net photosynthetic rate indicated that mutation or knock down of TCD5 decreased the net photosynthetic rate by 10.4%and 15.6%,respectively,while increasing it by 8.9%and 8.7%in the TCD5 over-expression lines in Jiahua1 and Nipponbare backgrounds,respectively.Accordingly,the measurements of chlorophyll fluorescence parameters showed that the electron transport rate and quantum yield decreased in tcd5 mutant or TCD5 RNAi lines but increased in TCD5 overexpression lines,both in Jiahua1 and Nipponbare backgrounds.IP-MS screening revealed that TCD5 interacts with 29 chloroplast proteins involved in chlorophyll synthesis,photo-reactions of the photosynthesis,carbon assimilation and metabolism,energy metabolism,redox balance,protein synthesis and transportation.Two TCD5 interacted proteins,D1 and FBA were effective targets for improving photosynthesis.These results suggest a potentially new strategy for increasing rice yield by enhancing photosynthesis. 展开更多
关键词 tcd5 PHOTOSYNTHESIS panicle number YIELD
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托莫西汀联合感觉统合训练治疗注意缺陷多动障碍患儿效果及对TCD参数、动态肌电图的影响
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作者 叶华贞 《黑龙江医药》 CAS 2023年第4期873-875,共3页
目的:探讨托莫西汀联合感觉统合训练治疗注意缺陷多动障碍(ADHD)患儿效果及对经颅多普勒超声检查(TCD)参数、动态肌电图的影响。方法:按随机数字表法将2021年9月至2022年9月我院收治的60例ADHD患儿分为两组,各30例。对照组采用托莫西汀... 目的:探讨托莫西汀联合感觉统合训练治疗注意缺陷多动障碍(ADHD)患儿效果及对经颅多普勒超声检查(TCD)参数、动态肌电图的影响。方法:按随机数字表法将2021年9月至2022年9月我院收治的60例ADHD患儿分为两组,各30例。对照组采用托莫西汀治疗,研究组在对照组基础上加用感觉统合训练治疗,对比两组临床疗效、TCD参数[大脑基底动脉(BA)、左侧中动脉(MCA-L)、左侧前动脉(ACA-L)、左侧后动脉(PCA-L)]、儿童感觉统合能力发展评定量表评分、中文版注意缺陷多动障碍评定量表-父母版(SNAP-IV)评分和不良反应。结果:研究组治疗后总有效率高于对照组(P<0.05);两组治疗后BA对比,无统计学差异(P>0.05);研究组治疗后MCA-L、ACA-L、PCA-L高于对照组(P<0.05);研究组治疗后儿童感觉统合能力发展评定量表评分高于对照组(P<0.05);研究组治疗后SNAP-IV评分低于对照组(P<0.05);两组治疗期间均无严重不良反应发生。结论:托莫西汀联合感觉统合训练可有效提升ADHD患儿的注意力和感觉统合能力,促进大脑动脉局部灌注的恢复,利于纠正患儿行为抑制缺陷,值得在临床上推广和应用。 展开更多
关键词 注意缺陷多动障碍 托莫西汀 感觉统合训练 tcd参数 动态肌电图
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TCD诊断大脑中动脉闭塞的一种特殊表现(附13例病例分析) 被引量:2
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作者 周玉珍 徐丽君 鲍俊 《中风与神经疾病杂志》 CAS CSCD 北大核心 2008年第2期238-238,共1页
关键词 大脑中动脉闭塞 tcd诊断 病例分析 血流信号 临床表现诊断 大脑后动脉 大脑前动脉 tcd表现
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心理应激对不同人格特质运动员TCD_4^+、TCD_8^+及IgG、IgA、IgM的影响 被引量:4
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作者 黄文英 吴纪饶 《中国临床康复》 CSCD 2003年第15期2250-2252,共3页
目的探讨心理应激对不同人格特质运动员免疫功能的影响。方法用艾森克人格问卷(EPQ)测定29名运动员的人格特质。用比浊法测定IgG,IgA,IgM的含量;用免疫组化法测定T淋巴细胞亚群的数量。结果①心理应激能引起不同人格特质青少年射击运动... 目的探讨心理应激对不同人格特质运动员免疫功能的影响。方法用艾森克人格问卷(EPQ)测定29名运动员的人格特质。用比浊法测定IgG,IgA,IgM的含量;用免疫组化法测定T淋巴细胞亚群的数量。结果①心理应激能引起不同人格特质青少年射击运动员的免疫球蛋白含量和TCD4+,TCD8+及CD4+/CD8+比值发生变化。②安静状态下,人格特质对免疫应答的变化没有必然的联系;心理应激后,人格特质EPQL、EPQE显著性影响IgG的变化,人格特质EPQN显著性影响TCD4+的变化;而人格特质与IgA,IgM及TCD8+,TCD4+/TCD8+比值变化相关性不高。结论短时间心理应激刺激对不同人格特质青少年射击运动员的体液免疫与细胞免疫具有抑制作用,其生理机制与神经系统积极参与免疫调节有关。 展开更多
关键词 心理应激 人格特质 运动员 tcd4^+ tcd8^+ IGG IGA IGM 免疫球蛋白类 T淋巴细胞
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改进TCD算法的疲劳寿命预测研究 被引量:1
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作者 刘本学 焦炳银 +1 位作者 郭沛东 刘贝贝 《机械设计与制造》 北大核心 2020年第5期14-18,共5页
在实际工程领域中,零件的疲劳破坏给工程界带来了难以计量的损失。所谓疲劳,是指零件在承受远低于其屈服极限的循环载荷时突然失效的情况。疲劳问题一直受到广泛关注,关键距离法(TCD算法)最初由Taylor等人提出,该理论将试件缺口附近区... 在实际工程领域中,零件的疲劳破坏给工程界带来了难以计量的损失。所谓疲劳,是指零件在承受远低于其屈服极限的循环载荷时突然失效的情况。疲劳问题一直受到广泛关注,关键距离法(TCD算法)最初由Taylor等人提出,该理论将试件缺口附近区域某点,线上的应力特征值作为疲劳失效判断准则。拟选用疲劳试验机对45#钢缺口试样在四种应力级下进行疲劳试验,对45#钢缺口试样的疲劳性能进行了试验研究。同时运用了传统TCD算法以及改进TCD算法对45#钢缺口试样的疲劳寿命进行了预测,与实验结果进行比较,改进的TCD算法相对于传统TCD算法获得的预测结果更令人满意。从而为工程上缺口构件的疲劳寿命预测提供了理论计算方法。 展开更多
关键词 疲劳破坏 传统tcd算法 改进tcd算法 疲劳寿命预测
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TCD发泡试验在肝硬化门静脉高压患者中的临床价值探讨
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作者 黎振林 《中国科技期刊数据库 医药》 2023年第6期104-106,共3页
探讨经颅多普勒(transcranialDoppler,TCD)发泡试验在肝硬化门静脉高压患者中的临床价值。方法 收集2021年5月~2023年4月玉林市红十字会医院消化内科收治肝硬化门静脉高压患者141例作为观察组,选择同期门诊就诊健康体检者58例作为对照组... 探讨经颅多普勒(transcranialDoppler,TCD)发泡试验在肝硬化门静脉高压患者中的临床价值。方法 收集2021年5月~2023年4月玉林市红十字会医院消化内科收治肝硬化门静脉高压患者141例作为观察组,选择同期门诊就诊健康体检者58例作为对照组,两组均进行发泡试验,记录观察组和对照组发泡试验阳性率并对比分析,同时将肝硬化门静脉高压伴和不伴食管胃静脉曲张出血的发泡试验阳性率、不同肝功能分级发泡试验阳性率进行比较,分析其差异性。结果 门静脉高压患者发泡试验阳性率高于健康者,差异有统计学意义(P<0.05)。食管胃底静脉曲张破裂出血发泡试验阳性率低于非食管胃底静脉曲张破裂出血,P<0.05。结论 在肝硬化门静脉高压患者中,进行TCD发泡试验具有临床应用的价值。该试验可以作为一种新的指导方法,用于在内镜下治疗食管胃底静脉曲张破裂出血时提供指导。 展开更多
关键词 tcd发泡试验 门静脉高压 临床价值
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偏头痛患者采用TCD发泡试验筛查卵圆孔未闭的价值分析与探讨
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作者 许丽丽 《中文科技期刊数据库(引文版)医药卫生》 2023年第12期24-26,共3页
探讨分析偏头痛患者的TCD发泡试验筛查卵圆孔未闭的临床表现,针对偏头痛患者的卵圆孔功能进行判断,为患者的诊断提供进一步的参考方案。方法 本次研究在进行实验设置时,选择实验时间段为2019年6月,至2022年3月,研究人员在该时段内将我... 探讨分析偏头痛患者的TCD发泡试验筛查卵圆孔未闭的临床表现,针对偏头痛患者的卵圆孔功能进行判断,为患者的诊断提供进一步的参考方案。方法 本次研究在进行实验设置时,选择实验时间段为2019年6月,至2022年3月,研究人员在该时段内将我院资料登记有效的偏头痛患者共计80名作为研究对象,选择同期内院中接受健康体检的成人共计80名作为对照对象。研究人员在针对所有患者的一般资料进行记录后,针对患者进行TCD发泡试验筛查卵圆孔未闭检查,诊断完成后,研究人员针对患者的TCD发泡试验筛查卵圆孔未闭指标进行评价,分析组间差异。结果 在本次研究结果中显示,相较于对照组来说,实验组内患者的TCD发泡试验筛查卵圆孔未闭结果中发生率明显更高,数据进行对比分析后,差异显著,具有统计学意义(P<0.05)。结论 偏头痛患者的TCD发泡试验可以用于筛查卵圆孔未闭。在本次结果中表明卵圆孔未闭与偏头痛之间存在相关性。这项检查可以为偏头痛患者的诊断提供重要的参考信息,特别是在考虑手术干预或其他治疗方案时。TCD发泡试验可用于评估偏头痛患者的卵圆孔功能和筛查卵圆孔未闭。这一方法对于指导偏头痛患者的诊断和治疗决策具有重要的临床意义。 展开更多
关键词 偏头痛 tcd发泡试验筛查卵圆孔未闭 诊断 临床研究
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脑梗死患者行经颅多普勒超声(TCD)与颈部血管超声(CUS)联合诊断效果分析
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作者 刘玲娜 《中文科技期刊数据库(引文版)医药卫生》 2023年第7期86-89,共4页
对脑梗死患者予以领出啊来检查,分析经颅多普勒超声与颈部血管超声联合诊断结果。方法 本次研究对收入的脑梗死患者、同期接受医院检查的健康体检对象予以诊断对比,均接受经颅多普勒超声与颈部血管超声检查,对比诊断结果。结果 对比诊... 对脑梗死患者予以领出啊来检查,分析经颅多普勒超声与颈部血管超声联合诊断结果。方法 本次研究对收入的脑梗死患者、同期接受医院检查的健康体检对象予以诊断对比,均接受经颅多普勒超声与颈部血管超声检查,对比诊断结果。结果 对比诊断结果:经颅多普勒超声、联合检查、金标准检查的血管狭窄检出率差异不大,分别和金标准检查对比,(p>0.05),无统计学意义。结论 经颅多普勒超声检查和颈部血管超声联合检查方式可帮助脑梗死患者及时诊断出疾病,临床的误诊率、漏诊率较低,联合检查和金标准检查结果差异不大,(p<0.05),有统计学意义。 展开更多
关键词 脑梗死患者 经颅多普勒超声(tcd) 颈部血管超声(CUS) 联合诊断 效果分析
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150例青年眩晕患者TCD检查分析 被引量:2
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作者 黄河 徐丽英 《实用神经疾病杂志》 2005年第6期95-96,共2页
目的探讨青年眩晕患者颅内动脉血流情况。方法对150例青年眩晕患者与100例正常健康人行TCD检查,记录颅内主要动脉流速。结果眩晕组流速异常率显著高于对照组(P<0.01),流速异常以增高为主,且椎基底动脉流速异常率明显高于其他动脉。... 目的探讨青年眩晕患者颅内动脉血流情况。方法对150例青年眩晕患者与100例正常健康人行TCD检查,记录颅内主要动脉流速。结果眩晕组流速异常率显著高于对照组(P<0.01),流速异常以增高为主,且椎基底动脉流速异常率明显高于其他动脉。结论青年眩晕患者存在较多椎基底动脉供血异常可能与现代生活节奏加快,颈椎病、颈肩肌疲劳在青年人中普遍存在有关。 展开更多
关键词 青年 眩晕 tcd tcd检查 眩晕 青年 患者 检查分析 椎-基底动脉供血 颅内动脉 动脉流速 正常健康人
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TCD检测颅内肿瘤血流动力学变化的意义
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作者 沈宏 余华 +1 位作者 甘海鹏 刘伟国 《浙江医学》 CAS 1995年第S1期60-61,共2页
经颅多普勒(TCD)技术在脑血管痉挛、脑动静脉畸形、脑梗塞等的诊断与检测方面有着重要价值。为了进一步探讨TCD检测颅内肿瘤血流动力学变化的意义,现将本科1990~1991年经手术证实的53例颅内肿瘤患者术前TCD检测结果作一回顾性分析。
关键词 颅内肿瘤 动力学变化 tcd检测 脑动静脉畸形 颅内高压 脑血管痉挛 颅内脑底动脉 诊断与检测 经颅多普勒(tcd) 回顾性分析
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TCD辅助尿激酶静脉溶栓及局部亚低温治疗急性脑梗死的疗效观察 被引量:24
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作者 周艳辉 余丹 +3 位作者 王琦 林珍 赖玉洁 杨国帅 《临床神经病学杂志》 CAS 北大核心 2015年第5期349-352,共4页
目的 探讨TCD辅助尿激酶静脉溶栓及局部亚低温治疗急性脑梗死的疗效。方法 对尿激酶组(24例)给予尿激酶静脉溶栓;亚低温联合组(24例)患者给予尿激酶联合局部亚低温治疗;TCD联合组(25例)患者给予TCD辅助尿激酶静脉溶栓;尿激酶+TC... 目的 探讨TCD辅助尿激酶静脉溶栓及局部亚低温治疗急性脑梗死的疗效。方法 对尿激酶组(24例)给予尿激酶静脉溶栓;亚低温联合组(24例)患者给予尿激酶联合局部亚低温治疗;TCD联合组(25例)患者给予TCD辅助尿激酶静脉溶栓;尿激酶+TCD+亚低温组(联合治疗组)(26例)患者给予TCD辅助尿激酶静脉溶栓后再予局部亚低温治疗。于溶栓前、溶栓后2 h、24 h、7 d、14 d采用NIHSS评分评价患者神经功能缺损程度。于3个月后采用mRS评分评价患者的神经功能。结果 TCD联合组及联合治疗组血管再通率显著高于尿激酶组(均P〈0.05)。与溶栓前比较,各组溶栓后各时间点NIHSS评分均显著下降(均P〈0.05)。与尿激酶组比较,TCD联合组及联合治疗组溶栓后各时间点NIHSS评分均显著下降;亚低温联合组溶栓后7 d、14 d时NIHSS评分均显著下降(P〈0.05~0.01)。与亚低温联合组比较,TCD联合组及联合治疗组溶栓后24 h、7 d、14 d时NIHSS评分均显著下降(均P〈0.05)。尿激酶组mRS评分显著高于亚低温联合组、TCD联合组及联合治疗组(均P〈0.05)。联合治疗组mRS评分显著低于亚低温联合组及TCD联合组(均P〈0.05)。各组间并发症发生率差异无统计学意义(均P〉0.05)。结论 TCD辅助溶栓及局部亚低温联合溶栓治疗在改善患者远期功能障碍方面显著优于单用尿激酶溶栓治疗或仅联合TCD及亚低温治疗,且并发症发生率无显著升高,是一种安全、有效的方法。 展开更多
关键词 静脉溶栓 亚低温 tcd 急性脑梗死
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