Subsurface thermal gradient spectrometry
    33.
    发明授权
    Subsurface thermal gradient spectrometry 失效
    地下热梯度光谱法

    公开(公告)号:US6049081A

    公开(公告)日:2000-04-11

    申请号:US093951

    申请日:1998-06-08

    IPC分类号: G01N21/35 G01N21/71

    摘要: Spectrometric methodology for non-invasively obtaining optical spectra from heterogeneous material for the identification and quantification of constituent compounds. There is provided a transient or steady state subsurface thermal gradient spectroscopic methodology for obtaining in vivo optical spectra relating to the concentration of n analytes at depths to around 330 microns in human tissue, and for determining that concentration from the spectra. The methodology is employable on a wide variety of spectrometric devices, and enables: a real time determination of both surface and reference intensities; a fast, efficient calibration of the spectrometric device; and results in the provision of an analytical parameter which avoids the measurement of the optical path length to enable the extremely accurate calculation of a ratio of concentrations of n analytes in the system under analysis.

    摘要翻译: 用于非侵入性地从异质材料获得光谱用于鉴定和定量组成化合物的光谱测定方法。 提供了一种瞬态或稳态地下热梯度光谱方法,用于获得与人体组织深度至330微米处的n种分析物的浓度有关的体内光谱,并用于确定来自光谱的浓度。 该方法可用于各种光谱测量装置,并且能够:实时确定表面和参考强度; 快速,高效地校准光谱仪; 并且导致提供了避免测量光程长度的分析参数,以使得能够非常精确地计算分析系统中的n种分析物的浓度比。

    Subsurface thermal gradient spectrometry
    38.
    发明授权
    Subsurface thermal gradient spectrometry 失效
    地下热梯度光谱法

    公开(公告)号:US5900632A

    公开(公告)日:1999-05-04

    申请号:US820378

    申请日:1997-03-12

    IPC分类号: G01N21/35 G01N21/71

    摘要: Spectrometric methodology for non-invasively obtaining optical spectra from heterogeneous material for the identification and quantification of constituent compounds. There is provided a transient or steady state subsurface thermal gradient spectroscopic methodology for obtaining in vivo optical spectra relating to the concentration of .eta. analytes at depths to around 330 microns in human tissue, and for determining that concentration from the spectra. The methodology is employable on a wide variety of spectrometric devices, and enables: a real time determination of both surface and reference intensities; a fast, efficient calibration of the spectrometric device; and results in the provision of an analytical parameter which avoids the measurement of the optical path length to enable the extremely accurate calculation of a ratio of concentrations of .eta. analytes in the system under analysis.

    摘要翻译: 用于非侵入性地从异质材料获得光谱用于鉴定和定量组成化合物的光谱测定方法。 提供了一种瞬态或稳态地下热梯度光谱方法,用于获得与人组织中深度约330微米处的eta分析物的浓度有关的体内光谱,并用于从光谱确定浓度。 该方法可用于各种光谱测量装置,并且能够:实时确定表面和参考强度; 快速,高效地校准光谱仪; 并且导致提供了避免测量光程长度的分析参数,以便能非常准确地计算分析系统中的η值分析物的浓度比。

    Self-emission noninvasive infrared spectrophotometer with body
temperature compensation
    39.
    发明授权
    Self-emission noninvasive infrared spectrophotometer with body temperature compensation 失效
    自发式无创红外分光光度计,具有体温补偿

    公开(公告)号:US5615672A

    公开(公告)日:1997-04-01

    申请号:US353099

    申请日:1994-12-09

    摘要: A method and apparatus for monitoring glucose, ethyl alcohol and other blood constituents in a noninvasive manner. The measurements are made by monitoring infrared absorption of the desired blood constituent in the long infrared wavelength range where the blood constituent has a strong and distinguishable absorption spectrum. The long wavelength infrared energy emitted by the person as heat is monitored and the infrared absorption of particular constituents in the blood (such as glucose or blood alcohol) is measured at characteristic infrared absorption wavelengths for those constituents. The measurements are preferably synchronized with systole and diastole of the cardiac cycle so that the signal contribution caused by veins and tissues (which do not pulse) may be cancelled when a ratio of the detected signals is taken. On the other hand, if no synchronization is provided, the spectrophotometer may measure the arterial, venous and tissue constituent concentrations simultaneously, which may be desired in some circumstances. The internal "blackbody" energy level of an infrared emissions source such as a vascularized appendage prior to glucose absorption is measured and used to compensate temperature dependent effects in the concentration calculation. The internal energy level is then ratioed to the actual measured energy and used to compute the percentage of energy absorbed by the glucose. Discontinuities in the ratio are eliminated by converting the absorption measurements from voltages to watts.

    摘要翻译: 一种以非侵入性方式监测葡萄糖,乙醇和其他血液成分的方法和装置。 通过监测血液成分具有强烈且可区分的吸收光谱的长红外波长范围内的所需血液成分的红外吸收来进行测量。 监测由人发射的长波长红外能量作为热,并且对于那些成分在特征红外吸收波长处测量血液中特定成分(如葡萄糖或血液酒精)的红外吸收。 所述测量优选与心动周期的收缩和心律舒张同步,使得当检测到的信号的比率被采取时,可以消除由静脉和组织引起的信号贡献(其不脉冲)。 另一方面,如果不提供同步,则分光光度计可以同时测量动脉,静脉和组织成分浓度,这在某些情况下可能是期望的。 测量红外发射源的内部“黑体”能级,例如葡萄糖吸收之前的血管附着物,并用于补偿浓度计算中的温度依赖性影响。 然后将内部能量水平与实际测量的能量进行比率,并用于计算葡萄糖吸收的能量的百分比。 通过将吸收测量值从电压转换为瓦特来消除比例的不连续性。