目的系统评价不安腿综合征(Restless legs syndrome,RLS)在肌萎缩侧索硬化(Amyotrophic lateral sclerosis,ALS)患者的患病率及其与疾病严重程度的相关性。方法计算机检索Cochrane图书馆、美国国立医学图书馆(PubMed)、荷兰医学文摘(Emb...目的系统评价不安腿综合征(Restless legs syndrome,RLS)在肌萎缩侧索硬化(Amyotrophic lateral sclerosis,ALS)患者的患病率及其与疾病严重程度的相关性。方法计算机检索Cochrane图书馆、美国国立医学图书馆(PubMed)、荷兰医学文摘(Embase)、Web of science、中国生物医学文献库(CBM)、中国知网(CNKI)、万方医学数据库(Wanfang data),收集有关ALS患者不安腿综合征的相关研究,检索时间为建库至2020-12-12。由两名研究者按照纳入标准及排除标准筛选文献,按照纽卡斯尔-渥太华量表(Newcastle-Ottawa Scale,NOS)对纳入的病例对照研究和队列研究进行质量评价。应用Revman5.3软件进行数据合并与发表偏倚检测。结果共纳入6篇文献,其中2篇队列研究,4篇病例对照研究,所有研究的NOS评分均≥6分。Meta分析结果显示RLS患病率在ALS患者中显著增加(OR=8.24,95%CI=4.57~14.87)。ALS亚组分析显示RLS阳性组白日过度嗜睡(EDS)比例显著增加(OR=3.42,95%CI=1.61~7.27,P=0.001);RLS阳性组ALSFRS-R评分较阴性组显著减低,提示功能缺损更加显著(MD=-3.76,95%CI=-7.16~-0.36,P=0.03)。本研究存在轻度的发表偏倚。结论RLS在ALS患者的患病率明显增加,且会影响患者睡眠质量,合并有RLS的ALS患者功能缺损更加显著,应引起临床医生的重视。展开更多
The feedback spring rod of the armature assembly is cancelled in the double redundance double nozzle flapper valve(DRDNFV),and the difficulty of valve core displacement control is increased.Therefore,this paper intend...The feedback spring rod of the armature assembly is cancelled in the double redundance double nozzle flapper valve(DRDNFV),and the difficulty of valve core displacement control is increased.Therefore,this paper intends to study the static characteristic of DRDNFV through the AMESet and AMESim simulation.It is explored under the circumstance of the fixed orifices being clogged and experimentally verified on the test bench.The results show that the pressure gain increases and the flow gain decreases with the increasing clogged degree of the fixed orifices on both sides.The zero bias increases synchronously with the increasing clogged degree of the unilateral fixed orifice.The experimental results are basically consistent with the theoretical curves and the theoretical correctness of the simulation model is effectively verified.The results can provide the theoretical reference for design,debugging,maintenance and fault diagnosis of DRDNFV.展开更多
文摘目的系统评价不安腿综合征(Restless legs syndrome,RLS)在肌萎缩侧索硬化(Amyotrophic lateral sclerosis,ALS)患者的患病率及其与疾病严重程度的相关性。方法计算机检索Cochrane图书馆、美国国立医学图书馆(PubMed)、荷兰医学文摘(Embase)、Web of science、中国生物医学文献库(CBM)、中国知网(CNKI)、万方医学数据库(Wanfang data),收集有关ALS患者不安腿综合征的相关研究,检索时间为建库至2020-12-12。由两名研究者按照纳入标准及排除标准筛选文献,按照纽卡斯尔-渥太华量表(Newcastle-Ottawa Scale,NOS)对纳入的病例对照研究和队列研究进行质量评价。应用Revman5.3软件进行数据合并与发表偏倚检测。结果共纳入6篇文献,其中2篇队列研究,4篇病例对照研究,所有研究的NOS评分均≥6分。Meta分析结果显示RLS患病率在ALS患者中显著增加(OR=8.24,95%CI=4.57~14.87)。ALS亚组分析显示RLS阳性组白日过度嗜睡(EDS)比例显著增加(OR=3.42,95%CI=1.61~7.27,P=0.001);RLS阳性组ALSFRS-R评分较阴性组显著减低,提示功能缺损更加显著(MD=-3.76,95%CI=-7.16~-0.36,P=0.03)。本研究存在轻度的发表偏倚。结论RLS在ALS患者的患病率明显增加,且会影响患者睡眠质量,合并有RLS的ALS患者功能缺损更加显著,应引起临床医生的重视。
基金Supported by the National Natural Science Foundation of China(52075468)the General Project of Natural Science Foundation of Hebei Prov-ince(E2020203052)+1 种基金the Open Fund Project of Shaanxi Provincial Key Laboratory of Hydraulic Technology(YYJS2022KF14)the BasicInnovation Research Cultivation Project of Yanshan University(2021LGZD003)。
文摘The feedback spring rod of the armature assembly is cancelled in the double redundance double nozzle flapper valve(DRDNFV),and the difficulty of valve core displacement control is increased.Therefore,this paper intends to study the static characteristic of DRDNFV through the AMESet and AMESim simulation.It is explored under the circumstance of the fixed orifices being clogged and experimentally verified on the test bench.The results show that the pressure gain increases and the flow gain decreases with the increasing clogged degree of the fixed orifices on both sides.The zero bias increases synchronously with the increasing clogged degree of the unilateral fixed orifice.The experimental results are basically consistent with the theoretical curves and the theoretical correctness of the simulation model is effectively verified.The results can provide the theoretical reference for design,debugging,maintenance and fault diagnosis of DRDNFV.
