Abstract: In order to supply a method and a device that can evaluate the fluidity of blood with good sensitivity in a simple manner, there is provided a blood fluidity evaluation method in which a pressure member is pressed against a test site upon a test subject, blood at the test site is squeezed to flow out to the periphery of the test site, change over time of the amount of blood at the test site is measured at this time using optical scattering, and blood fluidity at the test site is evaluated from this measurement data; and, desirably, before the above method, a positioning process is performed in which: the pressure member is pressed against the test site with a weak force; pulse measurement data is acquired due to the absorption of light; and a relative position, at which the intensity of the pulse measurement data attains a local maximum, is determined as being an optimum measurement position.

Abstract: Accurate occurrences of pulsation per unit time, that is, a heart rate is measured with a burden on a subject person being reduced to be very small and without being susceptible to body vibrations accompanying exercise.

Abstract: Accurate occurrences of pulsation per unit time, that is, a heart rate is measured with a burden on a subject person being reduced to be very small and without being susceptible to body vibrations accompanying exercise.

Abstract: A non-invasive manometer comprises a bladder to be attached to an appendage such as a finger, a leg, a tail or the like in order to apply a pressure thereto. A pressure changing device changes the pressure. Two pairs of photoelectric sensors sense a change in the diameter of the blood vessel due to the applied pressure and the internal pressure of the blood vessel. Each sensor includes a light emitting unit and a photosensitive unit. At least one of the units includes a plurality of elements. The photoelectric sensors are shielded from possible external light and operated alternately in a time-divisional manner. One sensor is disposed closer to the heart than the other sensor. The output of the other sensor is used to determine the highest blood pressure while the outputs of both the sensors are compared to determine the lowest blood pressure.