DEVICE FOR SPECTROPHOTOMETRIC ASSESSMENT OF BLOOD FILLING LEVEL OF HUMAN TISSUES AND ORGANS SURFACE LAYERS IN VIVO

摘要

FIELD: medicine.;SUBSTANCE: device contains a power source, an optical head connected thereto, which includes a radiation source emitting light in the spectral range of 520-590 nm, and a photodetector. The optical head is made with an open cavity, the walls of which are covered with light-absorbing material. The radiation source is installed in an open cavity. The device also includes a control unit for radiator operation, a data processing unit, an amplifier unit for analog electrical signals from the photodetector and their digitization, an indicator of the determined quantities. The device comprises a single outer housing and a pressure sensor. The open cavity is located in the center of the ring-shaped photodetector. The optical head is located on the pressure sensor surface. A storage unit is connected to the data processing unit to store intermediate measurement results. The power source, the radiation source control unit, the amplifier unit for analog electrical signals from the photodetector and their digitization, the data processing unit, the storage unit and the detected quantities indicator are represented by a single electronic unit enclosed in the device housing.;EFFECT: objective determination of the blood filling level evenly in the illuminated volume, excluding the influence of other chromophores other than blood on the instrument readings, using a more accurate and compact device.;3 dwg