Triple isotope method and analyzer for total energy expenditure measurements
    1.
    发明授权
    Triple isotope method and analyzer for total energy expenditure measurements 有权
    三重同位素测量方法和分析仪

    公开(公告)号:US08823923B2

    公开(公告)日:2014-09-02

    申请号:US13426220

    申请日:2012-03-21

    摘要: A method of measuring energy expenditure in a living subject comprises: (a) administering a specified dose of doubly-labeled water (2H218O) to a living subject; (b) obtaining samples at three or more times of body water from the living subject; (c) measuring 2H/1H, 17O/16O and 18O/16O ratios in each of the obtained samples using optical spectroscopy; and (d) determining (1) a combined value of flux of body water and exhaled carbon dioxide from a change in measured 18O/16O over time, (2) a value of flux of body water alone from a change in measured 2H/1H over time, and (3) a reference value of isotopic background fluctuation from a change in measured 17O/16O over time. Using 17O measurements to estimate background fluctuations of the 2H and 18O decreases the required isotope dosing of subjects or decreases uncertainty at current dosing levels.

    摘要翻译: 一种测量活体受试者能量消耗的方法包括:(a)向生物体施用指定剂量的双重标记水(2H218O); (b)从活体取得3次或3次以上的体力水样品; (c)使用光谱测量每个获得的样品中的2H / 1H,17O / 16O和18O / 16O比值; (d)根据测量的18O / 16O随时间的变化,确定(1)体内水分和呼出二氧化碳的通量的组合值,(2)单独的身体水流量与测量的2H / 1H的变化值 随着时间的推移,(3)随着时间的推移,测量的17O / 16O的变化同位素背景波动的参考值。 使用17O测量来估计2H和18O的背景波动可减少受试者所需的同位素剂量,或降低当前剂量水平下的不确定性。

    TRIPLE ISOTOPE METHOD AND ANALYZER FOR TOTAL ENERGY EXPENDITURE MEASUREMENTS
    2.
    发明申请
    TRIPLE ISOTOPE METHOD AND ANALYZER FOR TOTAL ENERGY EXPENDITURE MEASUREMENTS 有权
    三能同位素方法和分析仪用于总能源支出测量

    公开(公告)号:US20130027705A1

    公开(公告)日:2013-01-31

    申请号:US13426220

    申请日:2012-03-21

    IPC分类号: G01J3/42

    摘要: A method of measuring energy expenditure in a living subject comprises: (a) administering a specified dose of doubly-labeled water (2H218O) to a living subject; (b) obtaining samples at three or more times of body water from the living subject; (c) measuring 2H/1H, 17O/16O and 18O/16O ratios in each of the obtained samples using optical spectroscopy; and (d) determining (1) a combined value of flux of body water and exhaled carbon dioxide from a change in measured 18O/16O over time, (2) a value of flux of body water alone from a change in measured 2H/1H over time, and (3) a reference value of isotopic background fluctuation from a change in measured 17O/16O over time. Using 17O measurements to estimate background fluctuations of the 2H and 18O decreases the required isotope dosing of subjects or decreases uncertainty at current dosing levels.

    摘要翻译: 一种测量活体受试者能量消耗的方法包括:(a)向生物体施用指定剂量的双重标记水(2H218O); (b)从活体取得3次或3次以上的体力水样品; (c)使用光谱测量每个获得的样品中的2H / 1H,17O / 16O和18O / 16O比值; (d)根据测量的18O / 16O随时间的变化,确定(1)体内水分和呼出二氧化碳的通量的组合值,(2)单独的身体水流量与测量的2H / 1H的变化值 随着时间的推移,(3)随着时间的推移,测量的17O / 16O的变化同位素背景波动的参考值。 使用17O测量来估计2H和18O的背景波动可减少受试者所需的同位素剂量,或降低当前剂量水平下的不确定性。