检索结果-南通市图书馆

Better parameters of ventilation-CO2 output relationship predict death in CHF patients

在线全文

学校读者我要写书评

暂无评论

中国应用生理学杂志 2015年第6期31卷 508-516页

作者： You-xiu YAO Xing-guo SUN Zhe ZHENG Gui-zhi wANG James E. Hansen william w.Stringer karlman w.sserman Sheng-shou HU State Key Laboratory of Cardiovascular Disease Fuwai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China Peking University Third Hospital Beijing 100191 China Respiratory and Critical Care Physiology and Medicine Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Cente St. John's Cardiovascular Research Center Torrance CA 90502 USA Department of Anesthesiology Weifang Medical College Weifang 261061 China

Objective: Measures of ventilation-co_2 output relationship have been shown to be more prognostic than peak O_2 uptake in assessing life expectancy in patients with chronic heart failure(CHF). Because both the ratios(V4e/V4co_2) and slopes(V4e-vs-V4co_2) of ventilation-co_2 output of differing durations can be used, we aim to ascertain which measurements best predicted CHF life expectancy. Methods: Two hundred and seventy-one CHF patients with NYHA class II-IV underwent incremental cardiopulmonary exercise testing(CPET) and were followed-up for a median duration of 479 days. Four different linear regression V4e-vsV4co_2 slopes were calculated from warm-up exercise onset to: 180 s, anaerobic threshold(AT), ventilatory compensation point(VCP); and peak exercise. Five V4e/V4co_2 ratios were calculated for the following durations: rest(120 s), warm-up(30 s), AT(60 s), lowest value(90 s), and peak exercise(30 s). Death or heart transplant were considered end-points. Multiple statistical analyses were performed. Results: CHF patients had high lowest V4e/V4co_2(41.0±9.2, 141±30%pred), high V4e/V4co_2 at AT(42.5±10.4, 145±35%pred), and high V4e-vs-V4co_2 slope to VCP(37.6±12.1, 126±41%pred). The best predictor of death was a higher lowest V4e/V4co_2(≥42, ≥141%pred), whereas the V4e-vs-V4co_2 slope to VCP was less variable than other slopes. For death prognosis in 6 months, %pred values were superior: for longer times, absolute values were superior. Conclusion: The increased lowest V4e/V4co_2 ratio easily identifiable and simply measured during exercise, is the best measurement to assess the ventilation-co_2 output relationship in prognosticating death in CHF patients.

关键词：参数预测二氧化碳 CHF 死亡通气患者输出运动试验

代谢、血液碱化和纯氧影响呼吸调控的人体实验研究Ⅰ：运动试验

在线全文

学校读者我要写书评

暂无评论

中国应用生理学杂志 2015年第4期31卷 341-344,348,J0004,J0005页

作者：尹希孙兴国 william w. Stringer 王桂芝吕婧葛万刚刘方慈政 karlman w.sserman 中国医学科学院、北京协和医学院、国家心血管病中心阜外医院、心血管疾病国家重点实验室、心血管病国家临床医学研究中心北京100037 美国加州大学洛杉矶分校Harbor-UCLA医学中心洛杉矶生物医学研究院圣约翰心血管研究中心美国加州90502 河北医科大学第四人民医院功能科石家庄050000 山东省潍坊医学院麻醉学系临床麻醉学教研室和临床医学系潍坊261061 广州市第一人民医院麻醉科广州510180

目的：在整体整合生理学医学理论的指导下,通过分析正常人运动期间心肺代谢等多系统功能整体整合的连续动态变化,探讨正常环境运动状态下呼吸反应模式的调控机理。方法：选正常志愿者5名,在美国洛杉矶加州大学Harbor-UCLA医学中心分别... 详细信息

目的：在整体整合生理学医学理论的指导下,通过分析正常人运动期间心肺代谢等多系统功能整体整合的连续动态变化,探讨正常环境运动状态下呼吸反应模式的调控机理。方法：选正常志愿者5名,在美国洛杉矶加州大学Harbor-UCLA医学中心分别进行动脉置管,在常温室内空气状态下完成症状限制性最大极限心肺运动试验（CPET）。在运动过程中,连续测定肺通气指标及每分钟动脉取样的血气分析指标的变化,对CPET期间呼吸气体交换和血气指标的动态变化进行统计分析。结果：在CPET期间,随着运动功率逐步递增,分钟摄氧量（每呼吸摄氧量×呼吸频率=每搏摄氧量×心率）和分钟通气量（潮气量×呼吸频率）均呈现近于线性渐进性递增（与静息状态比较,P〈0.05~0.001）;在运动超过无氧阈和呼吸代偿点后,分钟通气量的上升反应更加显著。结论：人体在运动过程中,为了克服自行车功率计的阻力而发生代谢率改变,呼吸随代谢改变而变化,高强度运动时酸性代谢产物堆积更加加剧呼吸反应。

关键词：心肺运动试验呼吸反应模式室内空气呼吸频率潮气量分钟通气量

代谢、血液碱化和纯氧影响呼吸调控的人体实验研究Ⅱ：血液碱化后运动试验

在线全文

学校读者我要写书评

暂无评论

中国应用生理学杂志 2015年第4期31卷 345-348,J0006-J0008页

作者：孙兴国 william w. Stringer 尹希葛万刚王桂芝吕婧刘方慈政 karlman w.sserman 中国医学科学院、北京协和医学院、国家心血管病中心阜外医院、心血管疾病国家重点实验室、心血管病国家临床医学研究中心北京100037 美国加州大学洛杉矶分校Harbor-UCLA医学中心内科学系洛杉矶生物医学研究院圣约翰心血管研究中心美国加州90502 河北医科大学第四人民医院功能科石家庄050000 山东省潍坊医学院麻醉学系临床麻醉学教研室和临床医学系潍坊261061 广州市第一人民医院麻醉科广州510180

目的：在完成吸入室内空气状态下症状限制性最大极限心肺运动试验（CPET）和动脉血气指标动态变化规律的基础上,进一步探讨体液酸碱度和CO2含量对呼吸调控的影响。方法：选正常志愿者5名,给予5%Na HCO3（总量0.3 g/kg）分次口服,每5 mi... 详细信息

目的：在完成吸入室内空气状态下症状限制性最大极限心肺运动试验（CPET）和动脉血气指标动态变化规律的基础上,进一步探讨体液酸碱度和CO2含量对呼吸调控的影响。方法：选正常志愿者5名,给予5%Na HCO3（总量0.3 g/kg）分次口服,每5 min口服75 ml（3.75g）。总量服完1 h后,重复CPET。于静息、热身、运动及恢复期,连续测定肺通气指标及每分钟动脉取样的血气指标变化,并与本人在非碱化血液条件下对照数据进行配对t检验比较。结果：碱化血液之后,CPET期间随着运动功率逐步递增,气体交换和血气指标的反应模式与非碱化血液对照相似（P〉0.05）;即与静息状态比较,每分通气量、潮气量、呼吸频率、V4O2、V4CO2均呈现近于线性渐进性递增（P〈0.05~0.001）。与碱化血液前吸入室内空气的对照比较：在碱化血液条件下,所有时间点血红蛋白浓度,PaCO2与p H均显著提高（P〈0.05）;除无氧阈Pa CO2减低外,只有热身状态呈增高态势,统计学有显著差异（P〈0.05）;而PaO2无差异（P〉0.05）,各状态均较对照状态减低,除恢复期外均有统计学差异（P〈0.05）。与非碱化血液对照比较,除静息每分通气量低于对照（P〈0.05）外,所有通气指标均无统计学差异（P〉0.05）。结论：碱化血液条件下,尽管有更高的Ca CO2,Pa CO2和p Ha平均水平及更低的Hba和[H＋]a平均水平,机体对CPET的呼吸反应模式基本相似。

关键词：碱化血液心肺运动试验呼吸反应模式室内空气呼吸频率潮气量分钟通气量

同方期刊数据库

Building Digital Revenue Agency of the Future: Seven Keys to Transformation

在线全文

学校读者我要写书评

暂无评论

Belt and Road Initiative Tax Journal 2020年第2期1卷 64-76页

作者： Mark Price Gustav Jeppesen Kathryn karlman Jesper Kamstrup-Holm Ben Powell RuairíAllen Allan Mills Deloitte US board of Deloitte Denmark Deloitte Denmark Deloitte UK Deloitte Ireland Deloitte Australia

Changes in technology have dramatically changed the tax administration landscape and challenged the way the revenue agencies go about their work by gathering and analyzing information,supporting taxpayers and encouraging their *** agencies need to keep pace with rapid changes in technology and the industries,and lay a strong foundation for future *** article focuses on seven key strategies that help bring a new mindset to tax administration,workforce management and the customer experience,namely:(i)get digital to the core,(ii)unlock the power of data,(iii)reimagine the workforce,(iv)improve the tax experience,(v)tax new stuff fast,(vi)embrace the end-to-end tax community,and(vii)balance competing *** seven keys to transformation include three internal shifts,three external shifts,and one strategic mindset ***,agencies will need to transform by rethinking digital workflows,data management and the ***,agencies will need to become nimbler in order to enhance the taxpayer experience,develop processes to keep pace with economic reality,and deepen relationships with stakeholders in the taxation ***,agencies will have to address head-on the paradoxical demands of the digital ecosystem they occupy.

关键词： Digital revenue agency Digital transformation Digital workflows Data management workforce innovation