METHOD OF NONCONTACT DETERMINATION OF BLOOD VESSEL REACTIVITY AND DEVICE INTENDED FOR ITS REALIZATION Russian patent published in 1998 - IPC

FIELD: medicine. SUBSTANCE: section of body to be examined is marked. Initial intensity of radiation reflected from section of body under examination, when it is irradiated by monochromatic radiation, prior to introduction into section being examined of first physiological solution and then of dose of vasoactive substance in physiological solution. Process of variation of intensity of reflected monochromatic radiation is recorded continuously till intensity reaches maximum value after introduction of first physiological solution and then of vasoactive substance in physiological solution heated up to temperature of 31-33 C into section of body being examined. Relation of difference of maximum intensity values to initial intensity of reflected radiation is calculated, and reactivity of blood vessels is found by result continuously, and n intensities of reflected monochromatic radiation are recorded at moments of equality of current value of monochromatic radiation wave-length and n preset values of wave-lengths. Device intended for method realization has scanning monochromator with electric drive of dispersing element. With every complete displacement of dispersing element in monochromator, for example with every turn of prism, multichannel recording instrument records n signals corresponding to preset (operating) wave-lengths of monochromatic radiation. Record of these signals represents one cycle of recording, and combination of cycles constitutes oscillogram of process of intensity variation of monochromatic radiation reflected from examined section of body on n preset wave-lengths. Device has flexible metal semi-cup with plate like indicators and moving screen positioned between collector and semi-cup. Radiation source is represented by source with continuous radiation spectrum provided with condenser. EFFECT: high accuracy of determination of blood vessel reactivity. 3 cl, 5 dwg