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    • 4. 发明申请
    • ASSESSING BLOOD BRAIN BARRIER DYNAMICS OR IDENTIFYING OR MEASURING SELECTED SUBSTANCES OR TOXINS IN A SUBJECT BY ANALYZING RAMAN SPECTRUM SIGNALS OF SELECTED REGIONS IN THE EYE
    • 通过分析眼睛中选择的区域的拉曼光谱信号来评估血液脑屏障动态,或鉴定或测量选择的物质或毒素
    • WO02060321A2
    • 2002-08-08
    • PCT/US0200649
    • 2002-01-09
    • LOS ANGELES CHILDRENS HOSPITALCALIFORNIA INST OF TECHNLAMBERT JAMES LBORCHERT MARK S
    • LAMBERT JAMES LBORCHERT MARK S
    • A61B5/00G01N21/65
    • A61B5/1455A61B5/14532A61B5/14546A61B5/4064A61B5/411G01J3/027G01N21/65G01N2021/656
    • A non-invasive method for analyzing the blood-brain barrier includes obtaining a Raman spectrum of a selected portion of the eye and monitoring the Raman spectrum to ascertain a change to the dynamics of the blood brain barrier. Also, non-invasive methods for determining the brain or blood level of an analyte of interest, such as glucose, drugs, alcohol, poisons, and the like, comprises: generating an excitation laser beam (e.g., at a wavelength of 600 to 900 nanometers); focusing the excitation laser beam into the anterior chamber of an eye of the subject so that aqueous humor, vitreous humor, or one or more conjunctiva vessels in the eye is illuminated; detecting (preferably confocally detecting) a Raman spectrum from the illuminated portion of the eye; and then determining the blood level or brain level (intracranial or cerebral spinal fluid level) of an analyte of interest for the subject from the Raman spectrum. In certain embodiments, the detecting step may be followed by the step of subtracting a confounding fluorescence spectrum from the Raman spectrum to produce a difference spectrum; and determining the blood level and/or brain level of the analyte of interest for the subject from that difference spectrum, preferably using linear or nonlinear multivariate analysis such as partial least squares analysis. Apparatus for carrying out the foregoing methods are also disclosed.
    • 用于分析血脑屏障的非侵入性方法包括获得眼睛的所选部分的拉曼光谱并监测拉曼光谱以确定血脑屏障动力学的变化。 此外,用于确定目标分析物(例如葡萄糖,药物,酒精,毒素等)的脑或血液水平的非侵入性方法包括:产生激发激光束(例如,波长为600至900 纳米); 将激发激光束聚焦到受试者的眼睛的前房中,使得眼睛中的房水,玻璃体液或一个或多个结膜血管被照亮; 从眼睛的照射部分检测(优选地共同检测)拉曼光谱; 然后从拉曼光谱确定受试者感兴趣的分析物的血液水平或脑水平(颅内或脑脊液水平)。 在某些实施方案中,检测步骤之后可以是从拉曼光谱中减去混杂荧光光谱以产生差光谱的步骤; 并且优选使用线性或非线性多变量分析(例如偏最小二乘法分析)从所述差异光谱确定受试者感兴趣分析物的血液水平和/或脑水平。 还公开了用于实现上述方法的装置。