CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan Application Serial No. 107119001, filed on Jun. 1, 2018. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.

BACKGROUND OF THE INVENTION

Field of the Invention

The disclosure relates to a blood pressure detecting device and a detecting method thereof, and more particularly, to a wearable blood pressure detecting device and a detecting method thereof.

Description of the Related Art

A traditional wearable blood pressure detecting device detects a pulse wave velocity (PWV), and then acquires measured blood pressure values according to the same group of blood pressure calculating models built based on a relation between the pulse wave velocity and blood pressure.

However, different subjects are usually found in practice that, although the same pulse wave velocity is detected, due to differences of blood flow characteristics (such as, blood vessel size, elasticity and blood concentration), different blood pressure values exist. Under this circumstance, when a traditional wearable blood pressure detecting device is used, differences between the subjects are not effectively distinguished, and errors are generated easily, which affects accuracy of blood pressure detecting.

BRIEF SUMMARY OF THE INVENTION

The disclosure provides a wearable blood pressure detecting device. The wearable blood pressure detecting device includes a pulse detecting module, a processing unit, a memory unit, a model selecting unit, and a blood pressure calculating unit. The pulse detecting module is configured to generate a pulse waveform. The processing unit is configured to capture the pulse waveform to generate at least one pulse characteristic value. The memory unit is configured to store at least two blood pressure models corresponding to different pulse characteristic value ranges. The model selecting unit is configured to select the corresponding blood pressure model according to the at least one pulse characteristic value. The blood pressure calculating unit is configured to calculate a blood pressure value by the selected blood pressure model.

The disclosure provides a blood pressure detecting method. The blood pressure detecting method includes the following steps: providing a pulse waveform; generating at least one pulse characteristic value based on the pulse waveform; providing at least two blood pressure models corresponding to different pulse characteristic value ranges; selecting the corresponding blood pressure model based on the at least one pulse characteristic value; and calculating a blood pressure value by using the selected blood pressure model.

A traditional wearable blood pressure detecting device estimates the blood pressure value just based on a singular condition of a pulse wave velocity, blood flow characteristics of various to-be-tested persons are not effectively distinguished, and errors are easily generated, which affects accuracy of blood pressure detecting. In comparison, the wearable blood pressure detecting device and the detecting method thereof provided by the disclosure distinguish the blood flow characteristics of the different to-be-tested persons based on the pulse characteristic value, a proper blood pressure model is fast screened out, and the accuracy of blood pressure detecting is improved easily.

Specific embodiments of the disclosure will be further described by using the following examples and drawings.

