| CPC A61B 5/02116 (2013.01) [A61B 5/0059 (2013.01); A61B 5/1172 (2013.01); A61B 5/681 (2013.01); A61B 5/6815 (2013.01); A61B 5/6898 (2013.01); A61B 2562/0238 (2013.01)] | 20 Claims |
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1. An apparatus for non-invasively estimating bio-information, the apparatus comprising:
a pulse wave sensor configured to measure a pulse wave signal from an object;
a force sensor configured to measure a force exerted between the object and the pulse wave sensor;
a processor configured to:
obtain an oscillogram by using the pulse wave signal and the force,
determine a first mean arterial pressure (MAP) based on the obtained oscillogram,
extract additional information in an interval preceding a point of the first MAP of the oscillogram,
obtain a second MAP based on the first MAP and the additional information, and
estimate the bio-information based on the obtained second MAP; and
a display configured to output the estimated bio-information,
wherein the processor is further configured to:
determine, as the first MAP, a force value at a maximum amplitude point in the obtained oscillogram,
determine a peak point in the interval preceding the first MAP, and
extract, as the additional information, at least one of an amplitude and a force at the determined peak point, an amplitude and a force at a valley point between the peak point and the point of the first MAP, and an amplitude at the point of the first MAP,
wherein the processor is further configured to:
extract at least two of the additional information, and
obtain the second MAP by applying a ratio between values of the at least two of the additional information to the first MAP,
wherein the pulse wave sensor comprises:
at least one light source configured to emit light onto the object; and
at least one detector configured to detect light scattered or reflected from the object, and
wherein the processor is further configured to display a finger image on the display, and to display a blood vessel position of a finger which is superimposed on a position of a channel of the pulse wave sensor to guide a user to position a blood vessel of the finger on the channel.
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