PROBE FOR PHOTOELECTRIC CONVERSION TYPE FINGERTIP VOLUME PULSE WAVE DETECTOR

摘要

PURPOSE:To detect the surface temp. of a fingertip simultaneously with the measurement of a change in a blood flow rate by mounting a photodetector for detecting light transmitted through the fingertip and a fingertip temp. detection element for detecting the surface temp. of the fingertip. CONSTITUTION:When a fingertip 10 is inserted in a dark box 1 and placed on a fingertip placing stand 6, the fingertip 10 closes a through-hole 7 to touch a fingertip temp. detection element 8. When the switch is closed, light is emitted from a light transmitting element 3 and transmitted through the fingertip 10 to be detected by a photodetector 5. A change in the resistance value of the photodetector 5 is outputted to a measuring device main body 11 as a change in voltage and converted to a pulse waveform. At the same time, the fingertip temp. detection element 8 detects the surface temp. of the fingertip 10 to output the same to the measuring device main body 11 and it is judged whether the temp. of the fingertip is proper, by the operation of the measuring device main body 11. Since the change in the blood flow rate of the fingertip 10 and the surface temp. thereof are simultaneously measured, the surface temp. of the fingertip 10 is displayed on the display part of the measuring device main body 11 and, further, when the temp. of the fingertip is extremely low, a warning is issued to make it possible to urge the temporary suspension of measurement.