Non invasive transcutaneous hyperbilirubinemia analyzer.
The external appearance of the device BILITEST is given
in Figure 1, where the device's body, the liquid-crystal
display and the movable optic head are shown.
When the optic head is gently pressed against the infant's
forehead it switches the device automatically from the
standby mode to the measuring mode and initiates
a light-emitting diode to flash inside the device.
The light emitted by the light-emitting diode passes through
the optic head glass, penetrates into subcutaneous tissue
and scatters in it. A part of scattered light passes through
the other glass of the optic head and through two corresponding
interference filters and then reaches two photocells.
The optic-electronic scheme analyses reflected light and
displays the information on skin bilirubin content, measured
in TcBI units.
Switching the device from the standby mode to the measuring
mode as well as measuring process and indication of the
result on the digital display are performed automatically
during 2-3 seconds within one measuring cycle after pressing
the front side of the movable optic head.