CN117918886A - Blood pressure monitoring device, system and method based on ultrasonic waves - Google Patents
Blood pressure monitoring device, system and method based on ultrasonic waves Download PDFInfo
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Abstract
The invention discloses a blood pressure monitoring device, system and method based on ultrasonic waves. The blood pressure monitoring device comprises a wearing part and a monitoring part, wherein the wearing part is connected with the tail of the monitoring radical to form a ring shape. The monitoring part comprises an ultrasonic transducer, a controller, a display and a power supply part. The ultrasonic transducer includes a first ultrasonic transduction portion and a second ultrasonic transduction portion, the first ultrasonic transduction portion being disposed along a first direction and transmitting a first ultrasonic wave, the second ultrasonic transduction portion being disposed along a second direction and transmitting a second ultrasonic wave. The controller is electrically connected with the ultrasonic transducer to acquire the diameter of the blood vessel and the type of the blood vessel based on the electric signal fed back by the first ultrasonic transducer, and acquire the flow velocity of the blood based on the electric signal fed back by the first ultrasonic transducer, so as to calculate the blood pressure monitoring result of the blood vessel, and feed back the blood pressure monitoring result to the display for picture display. Therefore, the blood pressure monitoring device can monitor the blood pressure state of the user in real time for 24 hours under the condition of ensuring comfort.
Description
Technical Field
The invention relates to a blood pressure monitoring device based on ultrasonic waves, a blood pressure monitoring system comprising the blood pressure monitoring device, and a blood pressure monitoring method using the blood pressure monitoring system, and belongs to the technical field of medical appliances.
Background
The blood pressure plays an important role in the diagnosis, prevention and treatment strategies of the temporary medical science, can accurately reflect the specific information of the cardiovascular aspect of the patient, and can be used for doctors to carry out the subsequent corresponding diagnosis scheme. The blood pressure measuring method is divided into an invasive blood pressure measuring method and a non-invasive blood pressure measuring method, wherein the invasive blood pressure measuring method is used as a gold standard for blood pressure measurement, the accuracy is not doubtful, but the problem of complicated operation exists; non-invasive blood pressure measurements are currently in clinical use, generally arterial tone measurements, arterial volume clamp methods, pulse wave measurements and ultrasound pressure measurements at the development stage. The sensor used in the arterial tension measurement method has higher sensitivity and higher measurement precision, but has difficulty in fixing the measurement position of the sensor for a long time; the arterial volume clamp method has high measurement precision, but can not meet the requirement of patients on comfort; the pulse wave measurement method does not need a pressurizing sleeve, the comfort level is satisfied, but the measurement precision is still to be improved; the ultrasonic pressure measurement method has two advantages of comfort and high precision.
However, the existing ultrasonic manometry has the following problems: the sensors are too bulky, the number of sensors is small, and the positions are easily shifted. Therefore, there is a need to design a more comfortable, more convenient, and more accurate 24h continuous blood pressure monitoring device and system.
Disclosure of Invention
The invention aims to provide an ultrasonic-based blood pressure monitoring device.
Another technical problem to be solved by the present invention is to provide a blood pressure monitoring system based on ultrasound.
Another technical problem to be solved by the present invention is to provide a blood pressure monitoring method using the blood pressure monitoring system.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
According to a first aspect of an embodiment of the present invention, there is provided an ultrasound-based blood pressure monitoring device, including a wearing part for wearing on a human body and a monitoring part for monitoring blood pressure, the wearing part being connected with the monitoring part to form a ring shape;
wherein, the monitoring portion includes:
the display is positioned at the outermost side of the monitoring part and used for displaying the blood pressure monitoring result;
The controller is positioned at the inner side of the display and used for controlling the transceiving of ultrasonic signals, the calculation of blood pressure data and communication control;
An ultrasonic transducer located inside the display, the ultrasonic transducer comprising a first ultrasonic transduction portion and a second ultrasonic transduction portion; the first ultrasonic transduction part is arranged along a first direction and is used for transmitting or receiving first ultrasonic waves along a direction perpendicular to a wearing part of a human body; the second ultrasonic transduction part is arranged along a second direction and is used for transmitting or receiving second ultrasonic waves along a direction inclined to the wearing part of the human body;
The power supply part is positioned at the inner side of the display and is respectively and electrically connected with the display, the controller and the ultrasonic transducer for supplying electric energy;
The controller is electrically connected with the ultrasonic transducer to control the ultrasonic transducer to emit the first ultrasonic wave or the second ultrasonic wave and receive an electric signal fed back by the first ultrasonic transduction part or the second ultrasonic transduction part; the controller obtains the thickness and the type of the blood vessel based on the electric signals fed back by the first ultrasonic transduction part, and obtains the blood flow velocity in the blood vessel based on the electric signals fed back by the second ultrasonic transduction part, so as to calculate the blood pressure monitoring result of the blood vessel by integrating the thickness, the type and the flow velocity of the blood vessel; the controller is also electrically connected with the display to send the blood pressure monitoring result to the display.
Wherein preferably the ultrasound transducer comprises:
The flexible PCB is bent into an isosceles trapezoid, wherein the parallel short side of the isosceles trapezoid is parallel to the surface of the wearing part of the human body, and the waist side of the isosceles trapezoid forms a preset included angle with the surface of the wearing part of the human body;
the impedance matching layer is arranged at the bottom of the flexible PCB to form parallel long sides of the isosceles trapezoid, and the resistance of the impedance matching layer is close to the resistance of a human body;
The group of piezoelectric ceramic elements are arranged on the inner side of the isosceles trapezoid; wherein, a part of the piezoelectric ceramic element is symmetrically distributed on the parallel short sides of the isosceles trapezoid so as to form the first ultrasonic transduction part by matching with the flexible PCB and the impedance matching layer; the other part of the piezoelectric ceramic element is symmetrically distributed on two waist edges of the isosceles trapezoid so as to form the second ultrasonic transduction part by matching with the flexible PCB and the impedance matching layer.
Preferably, the flexible PCB is bent into a plurality of isosceles trapezoids along the length direction, and the impedance matching layer is arranged at the bottom of the flexible PCB to form a plurality of isosceles trapezoids mounting areas in cooperation with the flexible PCB;
and a plurality of groups of piezoelectric ceramic elements are arranged in each isosceles trapezoid mounting area along the width direction of the flexible PCB, so that the ultrasonic transducers form a rectangular array.
Wherein preferably, the angle of the preset included angle is 20-60 degrees.
Wherein preferably, the control section includes:
The MCU main control module is used for monitoring and controlling blood pressure;
The input end of the ultrasonic transmitting module is electrically connected with the MCU main control module, and the output end of the ultrasonic transmitting module is electrically connected with the ultrasonic transducer; the ultrasonic transmitting module is used for receiving the control signal of the MCU main control module and driving the ultrasonic transducer to transmit ultrasonic waves to a target blood vessel;
The input end of the signal processing module is electrically connected with the ultrasonic transducer, and the output end of the signal processing module is electrically connected with the MCU main control module; the signal processing module is used for receiving the electric signals fed back by the ultrasonic transducer and performing data processing so as to feed back the blood pressure monitoring result to the MCU main control module;
the MCU main control module is electrically connected with the display and used for sending the blood pressure monitoring result to the display.
Wherein preferably, the ultrasonic transmitting module comprises:
the impedance matching circuit is electrically connected with the MCU main control module and is used for matching the impedance value of the impedance matching layer;
A frequency generation circuit electrically connected with the impedance matching circuit for forming an initial power for driving the ultrasonic transducer;
And the power amplification circuit is electrically connected with the frequency generation circuit and is used for amplifying the initial power so that the amplified power is enough to drive the ultrasonic transducer.
Wherein preferably, the signal processing module comprises:
the signal amplifying circuit is electrically connected with the ultrasonic transducer to receive the electric signal fed back by the ultrasonic transducer and amplify the electric signal;
The filtering circuit is electrically connected with the signal amplifying circuit to receive the amplified electric signal and perform filtering treatment;
The AD conversion circuit is electrically connected with the filter circuit and used for receiving the electric signals after the filter processing and performing data processing based on a preset algorithm to form a blood pressure monitoring result.
According to a second aspect of embodiments of the present invention, there is provided an ultrasound-based blood pressure monitoring system comprising:
the blood pressure monitoring device is used for monitoring the blood pressure of a user in real time;
The cloud end is in communication connection with the blood pressure monitoring device through the base station so as to receive and store real-time blood pressure monitoring information of the blood pressure monitoring device;
The user end is in communication connection with the cloud end and is used for sending a parameter setting request to the cloud end, and feeding back control parameters returned by the cloud end to the blood pressure monitoring device so as to set parameters of the blood pressure monitoring device.
Preferably, the cloud end is respectively in communication connection with a plurality of blood pressure monitoring devices through the base station, and all the communication channels are mutually independent.
According to a third aspect of the embodiments of the present invention, there is provided a blood pressure monitoring method using the above blood pressure monitoring system, including the steps of:
Setting a blood pressure monitoring frequency at the cloud;
Judging whether the blood pressure monitoring frequency is set successfully or not;
If yes, entering the next step, and if not, sending out a communication abnormality alarm;
Controlling an ultrasonic transducer of the blood pressure monitoring device to emit ultrasonic waves to a target blood vessel of a user;
calculating the blood pressure in real time by using a controller of the blood pressure monitoring device;
Displaying the blood pressure monitoring result by using a display of the blood pressure monitoring device, and transmitting data to a cloud for storage until the blood pressure monitoring is finished;
And re-transmitting ultrasonic waves to a target blood vessel of the user based on the blood pressure monitoring frequency so as to perform the next blood pressure monitoring.
Compared with the prior art, the invention has the following technical effects:
1. The flexible wearing part is connected with the flexible monitoring radical tail to form a ring shape, wearing comfort is guaranteed by the flexible wearing part, and monitoring accuracy of blood pressure data is guaranteed by the flexible monitoring part for blood pressure monitoring by utilizing ultrasonic waves.
2. The ultrasonic transducer is divided into two parts, one part is perpendicular to the surface of the wearing part of the human body, and the other part is inclined to the surface of the wearing part of the human body, so that the ultrasonic transducer is respectively used for acquiring data information such as the diameter of a target blood vessel, the type of the blood vessel, the blood flow rate and the like, and further accurately calculating the blood pressure monitoring result of the target blood vessel based on the data information.
3. The ultrasonic transducer is designed into an array form, so that a blood vessel position diagram can be conveniently drawn, manual adjustment and positioning are not needed, ultrasonic energy can be ensured to cover a target blood vessel (namely, the ultrasonic energy can be applied to the target blood vessel), and the complicated operation of changing the position because the target blood vessel cannot be found is avoided, so that the convenience and the effectiveness of blood pressure monitoring are improved.
4. The annular blood pressure monitoring device on the arm of the user can be used as a bridge through the base station, and is communicated with the cloud to upload and store real-time blood pressure monitoring information to the cloud, so that medical staff or family members of the user can download and check real-time cloud data through the user side (such as a local computer, a mobile phone, ipad and the like), and meanwhile, related parameters can be set through the user side.
5. The display on the blood pressure monitoring device does not have the touch function to avoid the user to touch by mistake and lead to monitoring data to appear wrong, and can carry out the setting of monitoring parameter by the high in the clouds according to the user's needs, in order to realize the parameter change to blood pressure monitoring device, namely: blood pressure was measured every other time a day.
6. The cloud end is respectively in communication connection with the plurality of blood pressure monitoring devices through the base station, and all communication channels are mutually independent. Therefore, even if a plurality of users wear the annular structure in the same space, the blood pressure information data of different users can be accurately distinguished and managed, and data interference is avoided.
Drawings
Fig. 1 is a block diagram of an ultrasonic-based blood pressure monitoring device according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a controller according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram showing a front view of an ultrasonic transducer according to a first embodiment of the present invention;
FIG. 4 is a schematic side view of an ultrasonic transducer according to a first embodiment of the present invention;
FIG. 5 is a schematic diagram showing a front view of an ultrasonic transducer according to a second embodiment of the present invention;
FIG. 6 is a schematic side view of an ultrasonic transducer according to a second embodiment of the present invention;
FIG. 7 is a schematic diagram of a blood pressure monitoring system based on ultrasonic waves according to a third embodiment of the present invention;
fig. 8 is a flowchart of a blood pressure monitoring method according to a fourth embodiment of the present invention.
Detailed Description
The technical contents of the present invention will be described in detail with reference to the accompanying drawings and specific examples.
The embodiment of the invention mainly provides a more convenient ultrasonic blood pressure monitoring device and method for clinicians and other practitioners. When the device is placed at a preset position (such as an upper arm) of a user, the cloud server can communicate with the blood pressure monitoring device, and the dynamic change of the arterial blood vessel and blood flow information of the human body in a time domain range is continuously monitored for 24 hours by utilizing the penetrating capacity of ultrasonic waves, so that the blood pressure information of the user is displayed on a screen. It can be understood that the blood pressure monitoring device is a 24h blood pressure monitoring instrument based on the ultrasonic Doppler effect, and peripheral arterial blood pressure is measured through ultrasonic waves, so that the blood pressure monitoring device belongs to a noninvasive blood pressure measurement mode, and can meet the requirements of wearing comfort and measurement accuracy.
First embodiment
As shown in fig. 1, a blood pressure monitoring device based on ultrasound according to a first embodiment of the present invention includes a wearing part 1 and a monitoring part 2. The wearing part and the monitoring part are connected end to form a ring shape, so that the ring-shaped blood pressure monitoring device can be worn on the upper arm of the human body by using the wearing part 1, and the monitoring part 2 and the heart can be positioned at the same horizontal position, so that the blood pressure monitoring precision of the monitoring part 2 is improved.
In this embodiment, the wearing part 1 is a detachable adjustable elastic belt, and is used for fitting the skin of a human body, so as to improve the wearing comfort. Preferably, the elastic band is made of comfortable flexible materials and can be in seamless fit with human skin. More preferably, the elastic band is made of stretchable material to ensure comfortable wear for users of different sizes. It can be understood that the elastic belt is only one preferred embodiment of the wearing part 1 in this embodiment, and in other embodiments, the specific structure of the wearing part 1 may be adaptively adjusted according to different monitoring scenes.
In the present embodiment, the monitoring section 2 includes a display 21, a controller 22, an ultrasonic transducer 23, and a power supply section 24. The ultrasonic transducer 23 is used for receiving and transmitting ultrasonic signals, and converting the ultrasonic signals into electric signals to interact with the controller 22. The controller 22 is used for integrally controlling the blood pressure monitoring process, and performing data processing based on the electric signals fed back by the ultrasonic transducer 23 to form a blood pressure monitoring result; and, the controller 22 is further configured to send the blood pressure monitoring result to the display 21, so that the display 21 is used to display the blood pressure monitoring result to the user. The power supply portion 24 is electrically connected with the display 21, the controller 22 and the ultrasonic transducer 23, respectively, for supplying necessary electric power to the three.
Specifically, in the present embodiment, the display 21 is located at the outermost side of the monitoring portion 2 (i.e., the farthest end from the skin of the human body) for displaying time, network, electric quantity, blood pressure data information, etc. Since the monitor 2 of the present application needs to be attached to the skin, the display 21 is a LED soft screen, so that it can match the shape of the human arm. In addition, preferably, in order to avoid the influence of the false touch of the user on the display result, the LED soft screen does not have a touch function and only displays the picture.
The controller 22 is located inside the display 21 (i.e., on the side closer to the skin of the human body) for controlling the transmission and reception of ultrasonic signals, the calculation of blood pressure data, and communication control. Specifically, as shown in fig. 2, the controller 22 includes an MCU main control module 221, an ultrasonic transmission module 222, and a signal processing module 223. The MCU main control module 221 is used for blood pressure monitoring control. The input end of the ultrasonic transmitting module 222 is electrically connected with the MCU main control module 221, and the output end is electrically connected with the ultrasonic transducer 23, so that the ultrasonic transmitting module can receive the control signal of the MCU main control module 221 and drive the ultrasonic transducer 23 to transmit ultrasonic waves to a target blood vessel. The input end of the signal processing module 223 is electrically connected with the ultrasonic transducer 23, and the output end is electrically connected with the MCU main control module 221, so that the signal processing module 223 can receive the electric signal fed back by the ultrasonic transducer 23 and process data, thereby forming a blood pressure monitoring result, and feeds back the blood pressure monitoring result to the MCU main control module 221. In addition, the MCU main control module 221 is electrically connected to the display 21, and is configured to send the blood pressure monitoring result to the display 21 for displaying a picture.
In the above-described embodiments, specifically, the ultrasonic transmission module includes the impedance matching circuit, the frequency generation circuit, and the power amplification circuit. The impedance matching circuit is electrically connected to the MCU main control module 221, so as to match the impedance value of the impedance matching layer of the ultrasonic transducer 23. The frequency generating circuit is electrically connected to the impedance matching circuit for forming an initial power for driving the ultrasonic transducer 23. The power amplification circuit is electrically connected to the frequency generation circuit for amplifying the initial power such that the amplified power is sufficient to drive the ultrasonic transducer 23.
In the above-described embodiments, specifically, the signal processing module includes the signal amplifying circuit, the filter circuit, and the AD conversion circuit. The signal amplifying circuit is electrically connected to the ultrasonic transducer 23, so as to receive the electric signal fed back by the ultrasonic transducer and amplify the electric signal. The filter circuit is electrically connected with the signal amplifying circuit to receive the amplified electric signal and perform filtering treatment. The AD conversion circuit is electrically connected to the filter circuit for receiving the electric signal after the filtering process and performing data processing based on a preset algorithm (described in detail below based on the specific structure of the ultrasonic transducer 23) to form a blood pressure monitoring result.
The ultrasonic transducer 23 is located inside the controller 22 (i.e., on the side closer to the skin of the human body), and includes a first ultrasonic transduction portion and a second ultrasonic transduction portion. Wherein the first ultrasonic transducer is disposed along a first direction for transmitting or receiving a first ultrasonic wave in a direction perpendicular to the upper arm of the human body (i.e., a direction perpendicular to the skin surface of the upper arm of the human body). The second ultrasonic transduction portion is disposed along a second direction for transmitting or receiving a second ultrasonic wave in a direction inclined to the upper arm of the human body (i.e., forming an angle with the upper arm of the human body).
Specifically, as shown in fig. 3 and 4, in the present embodiment, the ultrasonic transducer 23 includes a flexible PCB 231, an impedance matching layer 232, and a set of piezoelectric ceramic elements 233. Wherein, flexible PCB 231 is buckled into isosceles trapezoid, when wearing the back of accomplishing, the parallel minor face of these isosceles trapezoid is parallel with the skin surface of human upper arm, and isosceles trapezoid's waist limit forms the contained angle of predetermineeing with the surface of human wearing the position, in this embodiment, should predetermine the contained angle preferably to be 20 ~ 60. The impedance matching layer 232 is disposed at the bottom of the flexible PCB 231 to form a parallel long side of an isosceles trapezoid, and the impedance matching layer 232 uses a couplant (commonly used silica gel or ultrasonic gel) close to a human body resistance value, and ensures that the occurrence and transmission of a signal waveform are not deformed by matching the ultrasonic resistance value, thereby ensuring the transmission precision of the signal and improving the accuracy of monitoring data. In addition, the impedance matching layer 232 has a flexible nature and can be attached to the human superficial skin in a seamless manner.
In this embodiment, three piezoelectric ceramic elements 233 are a group, and all three piezoelectric ceramic elements 233 are disposed on the inner side of an isosceles trapezoid. One of the piezoelectric ceramic elements 233 is vertically disposed on a parallel short side of the isosceles trapezoid to form a first ultrasonic transduction portion in cooperation with the flexible PCB 231 and the impedance matching layer 232. The other two piezoelectric ceramic elements 233 are symmetrically distributed on two waist edges of the isosceles trapezoid to form a second ultrasonic transduction portion in cooperation with the flexible PCB 231 and the impedance matching layer 232.
In this embodiment, the controller 22 is electrically connected to the ultrasonic transducer 23 to control the ultrasonic transducer 23 to emit the first ultrasonic wave or the second ultrasonic wave and receive the electric signal fed back by the first ultrasonic transducer or the second ultrasonic transducer. The controller 22 obtains the blood vessel thickness and the blood vessel type based on the electric signal fed back by the first ultrasonic transducer, and obtains the blood flow velocity in the blood vessel based on the electric signal fed back by the second ultrasonic transducer, so as to calculate the blood pressure monitoring result of the blood vessel by integrating the blood vessel thickness, the blood vessel type and the blood flow velocity. The specific working process is as follows:
(1) Acquisition of vessel diameter and vessel type
Specifically, the imaging process is performed on the target area based on the emission and reception of ultrasonic waves by the piezoelectric ceramic elements 233 vertically arranged on the parallel short sides of the isosceles trapezoid. When the ultrasonic signal is transmitted to the target blood vessel, reflection and refraction are respectively generated on the front wall and the back wall of the blood vessel, and the change rule of the diameter of the blood vessel and the diameter of the blood vessel in the heartbeat process can be obtained by analyzing the time difference of the ultrasonic wave reaching the front wall and the back wall. Therefore, according to the difference of the diameter changes of the arterial blood vessel and the venous blood vessel during normal heartbeat, the change condition of the blood vessel diameter is analyzed, and the artery and the vein can be successfully distinguished.
(2) Obtaining blood flow velocity
Specifically, two piezoelectric ceramic primitives 233 symmetrically distributed on two waist sides of an isosceles trapezoid are used for emitting continuous high-frequency ultrasound to a blood vessel, the incident ultrasound is reflected by flowing blood cells, and the frequency of the reflected echo signal changes, namely a Doppler blood flow frequency shift signal. The Doppler blood flow frequency shift signal has a linear relation with the velocity component of blood cells in the acoustic wave propagation direction, and the velocity of the blood flow velocity in the acoustic wave propagation direction can be measured by utilizing the linear relation to perform spectrum analysis on the Doppler blood flow frequency shift signal.
Moreover, it can be understood that in the present embodiment, the two piezoelectric ceramic elements 233 on the two waist sides of the isosceles trapezoid are arranged at 20 ° to 60 °, so as to measure the flow velocity of blood by using doppler shift conveniently, and in other embodiments, the angle can be adaptively adjusted according to the actual requirement.
It will be appreciated that the above data (i.e., vessel diameter, vessel type, and blood flow rate) may be used after data correction by an algorithm to ensure data accuracy.
In summary, according to the ultrasound-based blood pressure monitoring device provided by the first embodiment of the present invention, the flexible ultrasound transducer is placed on the upper arm of the user, so that the blood vessel to be measured can be covered perfectly. The inverse piezoelectric effect of the piezoelectric material in the flexible ultrasonic transducer is utilized, and the excitation effect is achieved by designing a circuit matched with the flexible ultrasonic transducer. A portion of the flexible ultrasonic transducer is vertically arranged for identifying blood vessels, measuring blood vessel diameters and distinguishing arterial and venous blood vessels; the other part is arranged in a mode of inclining by a preset angle so as to conveniently measure the flow velocity of blood by utilizing Doppler frequency shift. Therefore, the blood flow speed, the diameter and the blood vessel type of the blood vessel can be obtained after the data are corrected by the algorithm, so that the flow of the target blood vessel can be calculated, and the pressure intensity of the blood vessel can be calculated.
Second embodiment
On the basis of the first embodiment, a second embodiment of the present invention provides another ultrasonic-based blood pressure monitoring device. The blood pressure monitoring device includes a wearing part 1 and a monitoring part 2. The difference compared to the first embodiment is that the ultrasonic transducer 23 in the present embodiment is in the form of an array.
Specifically, as shown in fig. 5 and 6, the flexible PCB 231 is bent into m isosceles trapezoids along the length direction, and the impedance matching layer 232 is disposed at the bottom of the flexible PCB 231 to form a plurality of isosceles trapezoid mounting areas 230 in cooperation with the flexible PCB. Wherein, n groups of piezoelectric ceramic elements 233 are mounted in each isosceles trapezoid mounting area 230 along the width direction of the flexible PCB 231, so that the ultrasonic transducer 23 forms a rectangular array of m×n.
It can be appreciated that by forming the ultrasonic transducer 23 in an array form so as to facilitate drawing of a blood vessel position map, without manually adjusting the positioning, it is ensured that ultrasonic energy can cover a target blood vessel (i.e., ultrasonic energy can strike the target blood vessel), and cumbersome operation of changing the position because the target blood vessel cannot be found is avoided, thereby improving the convenience and effectiveness of blood pressure monitoring.
Except for the above differences, the other structures of this embodiment are the same as those of the first embodiment, and will not be described here again.
Third embodiment
In addition to the first or second embodiments described above, a third embodiment of the present invention provides an ultrasound-based blood pressure monitoring system. As shown in fig. 7, the blood pressure monitoring system includes a blood pressure monitoring device 10, a base station 20, a cloud end 30, and a user end 40.
Specifically, the blood pressure monitoring device 10 is used for monitoring the blood pressure of a user in real time. The cloud end 30 is in communication connection with the blood pressure monitoring device 10 through the base station 20, so as to receive and store real-time blood pressure monitoring information of the blood pressure monitoring device 10. The user terminal 40 is communicatively connected to the cloud terminal 30, and is configured to send a parameter setting request to the cloud terminal 30, and feed back control parameters returned by the cloud terminal 30 to the blood pressure monitoring device 10, so as to perform parameter setting on the blood pressure monitoring device 10.
It can be appreciated that in the present embodiment, the annular blood pressure monitoring device 10 on the arm of the user establishes a connection with the cloud end 30 and communicates with the cloud end through the base station 20 as a bridge, so as to upload and store the real-time monitoring information of the blood pressure. Medical staff or user family members can download and view real-time data of the cloud end 30 through the user end 40 (such as a local computer, a mobile phone, an ipad and the like), and meanwhile, related parameters can be set through the user end 40. Specifically, to prevent the user from touching the screen by mistake, the monitoring parameters are set by the cloud end 30, the user end 40 sends a parameter setting request to the cloud end 30, the cloud end 30 returns control parameters to the user end 40 based on the parameter setting request, and the user end 40 feeds back the control parameters to the MCU control module of the blood pressure monitoring device 10, so as to implement parameter modification of the blood pressure monitoring device 10. Without loss of generality, this parameter is the frequency of blood pressure monitoring, i.e. how often blood pressure is measured every day.
In addition, in the present embodiment, the cloud end 30 is respectively connected to the plurality of blood pressure monitoring devices 10 through the base station 20 in a communication manner, and the communication channels are independent from each other. Therefore, even if a plurality of users wear the annular structure in the same space, the blood pressure information data of different users can be accurately distinguished and managed, and data interference is avoided.
Fourth embodiment
As shown in fig. 8, on the basis of the third embodiment, a blood pressure monitoring method according to a fourth embodiment of the present invention further includes steps S1 to S7:
s1: the blood pressure monitoring frequency is set at the cloud end 30.
S2: judging whether the blood pressure monitoring frequency is set successfully or not.
S3: if yes, the next step is carried out, and if not, a communication abnormality alarm is sent out.
S4: the ultrasonic transducer 23 of the blood pressure monitoring device 10 is controlled to emit ultrasonic waves to a target blood vessel of the user.
S5: the blood pressure is calculated in real time by the controller 22 of the blood pressure monitoring device 10.
S6: the display 21 of the blood pressure monitoring device 10 is used for displaying the current blood pressure monitoring result, and data is transmitted to the cloud end 30 for storage until the current blood pressure monitoring is finished.
S7: and re-transmitting ultrasonic waves to the target blood vessel of the user based on the blood pressure monitoring frequency so as to carry out the next blood pressure monitoring.
It can be appreciated that the blood pressure monitoring method can realize 24h uninterrupted blood pressure monitoring, and the blood pressure monitoring device 10 with the annular structure can not influence the normal life of a user, so that the wearing comfort level can be ensured, and the blood pressure state of the user can be monitored in real time and accurately.
It should be noted that the above embodiments are only examples, and the technical solutions of the embodiments may be combined, which are all within the protection scope of the present invention.
It should be understood that the terms "thickness," "depth," "upper," "lower," "horizontal," and the like indicate an orientation or positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The blood pressure monitoring device, the blood pressure monitoring system and the blood pressure monitoring method based on the ultrasonic waves provided by the invention are described in detail. Any obvious modifications to the present invention, without departing from the spirit thereof, would constitute an infringement of the patent rights of the invention and would take on corresponding legal liabilities.
Claims (10)
1. The ultrasonic-based blood pressure monitoring device is characterized by comprising a wearing part for wearing on a human body and a monitoring part for monitoring blood pressure, wherein the wearing part is connected with the tail of the monitoring radical to form a ring shape;
wherein, the monitoring portion includes:
the display is positioned at the outermost side of the monitoring part and used for displaying the blood pressure monitoring result;
The controller is positioned at the inner side of the display and used for controlling the transceiving of ultrasonic signals, the calculation of blood pressure data and communication control;
An ultrasonic transducer located inside the display, the ultrasonic transducer comprising a first ultrasonic transduction portion and a second ultrasonic transduction portion; the first ultrasonic transduction part is arranged along a first direction and is used for transmitting or receiving first ultrasonic waves along a direction perpendicular to a wearing part of a human body; the second ultrasonic transduction part is arranged along a second direction and is used for transmitting or receiving second ultrasonic waves along a direction inclined to the wearing part of the human body;
The power supply part is positioned at the inner side of the display and is respectively and electrically connected with the display, the controller and the ultrasonic transducer for supplying electric energy;
The controller is electrically connected with the ultrasonic transducer to control the ultrasonic transducer to emit the first ultrasonic wave or the second ultrasonic wave and receive an electric signal fed back by the first ultrasonic transduction part or the second ultrasonic transduction part; the controller obtains the thickness and the type of the blood vessel based on the electric signals fed back by the first ultrasonic transduction part, and obtains the blood flow velocity in the blood vessel based on the electric signals fed back by the second ultrasonic transduction part, so as to calculate the blood pressure monitoring result of the blood vessel by integrating the thickness, the type and the flow velocity of the blood vessel; the controller is also electrically connected with the display to send the blood pressure monitoring result to the display.
2. The blood pressure monitoring device of claim 1, wherein the ultrasound transducer comprises:
The flexible PCB is bent into an isosceles trapezoid, wherein the parallel short side of the isosceles trapezoid is parallel to the surface of the wearing part of the human body, and the waist side of the isosceles trapezoid forms a preset included angle with the surface of the wearing part of the human body;
the impedance matching layer is arranged at the bottom of the flexible PCB to form parallel long sides of the isosceles trapezoid, and the resistance of the impedance matching layer is close to the resistance of a human body;
The group of piezoelectric ceramic elements are arranged on the inner side of the isosceles trapezoid; wherein, a part of the piezoelectric ceramic element is symmetrically distributed on the parallel short sides of the isosceles trapezoid so as to form the first ultrasonic transduction part by matching with the flexible PCB and the impedance matching layer; the other part of the piezoelectric ceramic element is symmetrically distributed on two waist edges of the isosceles trapezoid so as to form the second ultrasonic transduction part by matching with the flexible PCB and the impedance matching layer.
3. The blood pressure monitoring device of claim 2, wherein:
The flexible PCB is bent into a plurality of isosceles trapezoids along the length direction, and the impedance matching layer is arranged at the bottom of the flexible PCB to form a plurality of isosceles trapezoids mounting areas in cooperation with the flexible PCB;
and a plurality of groups of piezoelectric ceramic elements are arranged in each isosceles trapezoid mounting area along the width direction of the flexible PCB, so that the ultrasonic transducers form a rectangular array.
4. A blood pressure monitoring device according to claim 3, wherein:
the angle of the preset included angle is 20-60 degrees.
5. The blood pressure monitoring device according to claim 2, wherein the control section includes:
The MCU main control module is used for monitoring and controlling blood pressure;
The input end of the ultrasonic transmitting module is electrically connected with the MCU main control module, and the output end of the ultrasonic transmitting module is electrically connected with the ultrasonic transducer; the ultrasonic transmitting module is used for receiving the control signal of the MCU main control module and driving the ultrasonic transducer to transmit ultrasonic waves to a target blood vessel;
The input end of the signal processing module is electrically connected with the ultrasonic transducer, and the output end of the signal processing module is electrically connected with the MCU main control module; the signal processing module is used for receiving the electric signals fed back by the ultrasonic transducer and performing data processing so as to feed back the blood pressure monitoring result to the MCU main control module;
the MCU main control module is electrically connected with the display and used for sending the blood pressure monitoring result to the display.
6. The blood pressure monitoring device of claim 5, wherein the ultrasound transmission module comprises:
the impedance matching circuit is electrically connected with the MCU main control module and is used for matching the impedance value of the impedance matching layer;
A frequency generation circuit electrically connected with the impedance matching circuit for forming an initial power for driving the ultrasonic transducer;
And the power amplification circuit is electrically connected with the frequency generation circuit and is used for amplifying the initial power so that the amplified power is enough to drive the ultrasonic transducer.
7. The blood pressure monitoring device of claim 1, wherein the signal processing module comprises:
the signal amplifying circuit is electrically connected with the ultrasonic transducer to receive the electric signal fed back by the ultrasonic transducer and amplify the electric signal;
The filtering circuit is electrically connected with the signal amplifying circuit to receive the amplified electric signal and perform filtering treatment;
The AD conversion circuit is electrically connected with the filter circuit and used for receiving the electric signals after the filter processing and performing data processing based on a preset algorithm to form a blood pressure monitoring result.
8. An ultrasound-based blood pressure monitoring system, comprising:
the blood pressure monitoring device of any one of claims 1 to 7 for real-time blood pressure monitoring of a user;
The cloud end is in communication connection with the blood pressure monitoring device through the base station so as to receive and store real-time blood pressure monitoring information of the blood pressure monitoring device;
The user end is in communication connection with the cloud end and is used for sending a parameter setting request to the cloud end, and feeding back control parameters returned by the cloud end to the blood pressure monitoring device so as to set parameters of the blood pressure monitoring device.
9. The blood pressure monitoring system of claim 8, wherein:
The cloud end is respectively in communication connection with the plurality of blood pressure monitoring devices through the base station, and all communication channels are mutually independent.
10. A blood pressure monitoring method, implemented with the blood pressure monitoring system of claim 8 or 9, characterized by comprising the steps of:
Setting a blood pressure monitoring frequency at the cloud;
Judging whether the blood pressure monitoring frequency is set successfully or not;
If yes, entering the next step, and if not, sending out a communication abnormality alarm;
Controlling an ultrasonic transducer of the blood pressure monitoring device to emit ultrasonic waves to a target blood vessel of a user;
calculating the blood pressure in real time by using a controller of the blood pressure monitoring device;
Displaying the blood pressure monitoring result by using a display of the blood pressure monitoring device, and transmitting data to a cloud for storage until the blood pressure monitoring is finished;
And re-transmitting ultrasonic waves to a target blood vessel of the user based on the blood pressure monitoring frequency so as to perform the next blood pressure monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311784196.3A CN117918886A (en) | 2023-12-22 | 2023-12-22 | Blood pressure monitoring device, system and method based on ultrasonic waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311784196.3A CN117918886A (en) | 2023-12-22 | 2023-12-22 | Blood pressure monitoring device, system and method based on ultrasonic waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117918886A true CN117918886A (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311784196.3A Pending CN117918886A (en) | 2023-12-22 | 2023-12-22 | Blood pressure monitoring device, system and method based on ultrasonic waves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117918886A (en) |
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2023
- 2023-12-22 CN CN202311784196.3A patent/CN117918886A/en active Pending
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