| CPC A61B 5/02141 (2013.01) [A61B 5/0004 (2013.01); A61B 5/0235 (2013.01); A61B 2562/0247 (2013.01)] | 13 Claims |
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1. A pulse diagnostic device, comprising:
a cuff, comprising a tube and an air bag, wherein the air bag is arranged with an air path interface, the air bag defines a chamber configured for receiving a gas medium, the tube is connected to the air path interface, and the tube defines a channel communicated with the chamber; and
a main monitor, comprising a pressure sensor and a controller, wherein the tube is connected to the pressure sensor, and the pressure sensor is further connected to the controller,
wherein the cuff is configured to encircle an arm or a wrist of a user to encircle an artery of the user, the pressure sensor is configured to sense a pressure of the gas medium in the tube to obtain a sensed pressure of the gas medium, the pressure sensor is configured to transmit the sensed pressure of the gas medium to the controller, and the controller is configured to obtain pulse information and blood pressure information of the user based on the pressure of the gas medium; and
the pulse diagnostic device is configured to perform a pressure increasing process and a pressure decreasing process, the pressure of the gas medium is a sum of a static pressure of the cuff and a pulse pressure generated by the artery, and in the decreasing process, the controller is configured to perform operations of:
controlling a deflation valve to be switched on;
obtaining a first pressure and a second pressure, wherein the first pressure is obtained by the pressure sensor from a present sampling, the second pressure is obtained by the pressure sensor from a previous sampling;
processing the first pressure and the second pressure to obtain a first static pressure of the cuff and a second static pressure of the cuff;
obtaining an actual releasing rate of the gas medium in the air bag based on the first static pressure of the cuff and the second static pressure of the cuff;
controlling the deflation valve to be on in a smaller degree when the actual releasing rate is greater than a constant rate, such that the actual releasing rate of the gas medium is reduced; and
controlling the deflation valve to be on in a greater degree when the actual releasing rate is less than the constant rate, such that the actual releasing rate of the gas medium is increased;
the pulse diagnostic device further comprises an inflation/deflation assembly, connected to the controller and the tube, wherein the controller is configured to control the inflation/deflation assembly to inflate and/or deflate the air bag to adjust the static pressure applied by the cuff onto the artery of the user; the inflation/deflation assembly comprises:
an air pump, connected to the controller and the tube, wherein the controller is configured to control the air pump to initiate or stop, such that the air pump is configured to be controlled to inflate or stop inflating the air bag; and
the deflation valve, connected to the controller and the tube, wherein the controller is configured to control the deflation valve to be on and off, such that the deflation valve is configured to be controlled to release or stop releasing the gas medium from the air bag;
in the pressure increasing process, the controller is configured to control the air pump to initiate, the air pump is configured to inflate the air bag through the tube, the controller is configured to control the air pump to stop inflating when the pressure of the gas medium exceeds a predefined value;
in the pressure decreasing process, the controller is configured to control the deflation valve to be switched on, and to control the gas medium in the air bag to be released in the constant rate through the tube; and
the controller is configured to perforin operations of:
obtaining a third pulse wave of the pressure of the gas medium relative to time in the pressure increasing process and a fourth pulse wave of the pressure of the gas medium relative to time in the pressure decreasing process, wherein the pressure decreasing process comprises a plurality of pulse periods;
extracting a minimum value point of the pressure of the gas medium from each of the plurality of pulse periods, to obtain a plurality of minimum value points; and
subtracting signals below a straight line between two of the plurality of minimum value points from a fifth pulse wave between the two minimum value points to obtain a sixth pulse wave serving as the pulse information.
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