Blood pressure monitoring apparatus, system and method based on ultrasonic wave

Abstract

A blood pressure monitoring apparatus, system and method based on an ultrasonic wave. The blood pressure monitoring apparatus comprises a wearing portion and a monitoring portion, wherein the wearing portion is connected to the monitoring portion end to end, so as to form a ring. The monitoring portion comprises an ultrasonic transducer, a controller, a display and a power supply portion. The ultrasonic transducer comprises a first ultrasonic transduction portion and a second ultrasonic transduction portion, wherein the first ultrasonic transduction portion is arranged in a first direction and emits a first ultrasonic wave, and the second ultrasonic transduction portion is arranged in a second direction and emits a second ultrasonic wave. The controller is electrically connected to the ultrasonic transducer, so as to acquire a blood vessel diameter and a blood vessel type on the basis of an electrical signal fed back by the first ultrasonic transduction portion, and to acquire a blood flow velocity on the basis of an electrical signal fed back by the second ultrasonic transduction portion, thereby calculating a blood pressure monitoring result of a blood vessel, and feeding the blood pressure monitoring result back to the display for picture display. Therefore, by using the blood pressure monitoring apparatus, a blood pressure state of a user can be monitored in real time 24 hours a day when the comfort level is ensured.

Description

Ultrasonic blood pressure monitoring device, system and method Technical Field

[0001] The present invention relates to an ultrasound-based blood pressure monitoring device, a blood pressure monitoring system including the blood pressure monitoring device, and a blood pressure monitoring method using the blood pressure monitoring system, belonging to the technical field of medical devices. Background Art

[0002] Blood pressure plays a crucial role in clinical diagnosis, prevention, and treatment strategies. It accurately reflects a patient's cardiovascular health, enabling doctors to develop appropriate follow-up diagnostic plans. Blood pressure measurement methods are categorized into invasive and non-invasive methods. Invasive, the gold standard for blood pressure measurement, offers undeniable accuracy but is cumbersome to perform. Currently, non-invasive methods used clinically include arterial tonometry, arterial volume clamping, pulse wave measurement, and, currently under development, ultrasonic pressure measurement. Arterial tonometry utilizes highly sensitive sensors and offers high measurement accuracy, but poses challenges in maintaining a fixed sensor position for extended periods. Arterial volume clamping offers high measurement accuracy but does not meet patient comfort requirements. Pulse wave measurement, which requires no pressure cuff, offers satisfactory comfort, but accuracy needs improvement. Ultrasonic pressure measurement offers both comfort and accuracy.

[0003] However, existing ultrasonic pressure measurement methods have the following problems: the sensors are too large, the number of sensors is small, and the position of the sensors is easily shifted. Therefore, it is urgent to design a more comfortable, convenient, and accurate 24-hour continuous blood pressure monitoring device and system. Summary of the Invention

[0004] The primary technical problem to be solved by the present invention is to provide an ultrasound-based blood pressure monitoring device.

[0005] Another technical problem to be solved by the present invention is to provide an ultrasound-based blood pressure monitoring system.

[0006] Another technical problem to be solved by the present invention is to provide a blood pressure monitoring method using the blood pressure monitoring system.

[0007] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0008] According to a first aspect of an embodiment of the present invention, there is provided an ultrasound-based blood pressure monitoring device, comprising a wearing portion for being worn on a human body and a monitoring portion for monitoring blood pressure, wherein the wearing portion and the monitoring portion are connected end to end to form a ring;

[0009] Wherein, the monitoring unit includes:

[0010] a display, located at the outermost side of the monitoring unit, for displaying blood pressure monitoring results;

[0011] a controller, located inside the display, for controlling the transmission and reception of ultrasonic signals, the calculation of blood pressure data, and communication control;

[0012] An ultrasonic transducer is located on the inner side of the display, and includes a first ultrasonic transducer portion and a second ultrasonic transducer portion; wherein the first ultrasonic transducer portion is arranged along a first direction to transmit or receive a first ultrasonic wave in a direction perpendicular to the part of the human body where the device is worn; and the second ultrasonic transducer portion is arranged along a second direction to transmit or receive a second ultrasonic wave in a direction oblique to the part of the human body where the device is worn;

[0013] a power supply unit, located inside the display and electrically connected to the display, the controller and the ultrasonic transducer, for providing electrical energy;

[0014] In which, the controller is electrically connected to the ultrasonic transducer to control the ultrasonic transducer to emit the first ultrasonic wave or the second ultrasonic wave, and receive the electrical signal fed back by the first ultrasonic transducer part or the second ultrasonic transducer part; the controller obtains the blood vessel thickness and blood vessel type based on the electrical signal fed back by the first ultrasonic transducer part, and obtains the blood flow rate in the blood vessel based on the electrical signal fed back by the second ultrasonic transducer part, so as to calculate the blood pressure monitoring result of the blood vessel by comprehensively considering the blood vessel thickness, blood vessel type and blood flow rate; the controller is also electrically connected to the display to send the blood pressure monitoring result to the display.

[0015] Preferably, the ultrasonic transducer comprises:

[0016] A flexible PCB is bent into an isosceles trapezoid, wherein the parallel short sides of the isosceles trapezoid are parallel to the surface of the wear portion of the human body, and the waist side of the isosceles trapezoid forms a preset angle with the surface of the wear portion of the human body;

[0017] An impedance matching layer is provided 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 the human body;

[0018] A group of piezoelectric ceramic elements are arranged on the inner side of the isosceles trapezoid; wherein, a portion of the piezoelectric ceramic elements are symmetrically distributed on the parallel short sides of the isosceles trapezoid to cooperate with the flexible PCB and the impedance matching layer to form the first ultrasonic transducer; another portion of the piezoelectric ceramic elements are symmetrically distributed on the two waist sides of the isosceles trapezoid to cooperate with the flexible PCB and the impedance matching layer to form the second ultrasonic transducer.

[0019] Preferably, the flexible PCB is bent into a plurality of isosceles trapezoids along the length direction, and the impedance matching layer is provided at the bottom of the flexible PCB to cooperate with the flexible PCB to form a plurality of isosceles trapezoidal mounting areas;

[0020] A plurality of piezoelectric ceramic elements are installed in each of the isosceles trapezoidal installation areas along the width direction of the flexible PCB board, so that the ultrasonic transducers form a rectangular array.

[0021] Preferably, the preset angle is between 20° and 60°.

[0022] Preferably, the control unit includes:

[0023] MCU main control module for blood pressure monitoring and control;

[0024] An ultrasonic transmitter module, the input end of which is electrically connected to the MCU main control module, and the output end of which is electrically connected to the ultrasonic transducer; the ultrasonic transmitter module is used to receive control signals from the MCU main control module and drive the ultrasonic transducer to transmit ultrasonic waves toward the target blood vessel;

[0025] a signal processing module, the input end of which is electrically connected to the ultrasonic transducer, and the output end of which is electrically connected to the MCU main control module; the signal processing module is used to receive the electrical signal fed back by the ultrasonic transducer and perform data processing to feed back the blood pressure monitoring result to the MCU main control module;

[0026] The MCU main control module is electrically connected to the display so as to send the blood pressure monitoring result to the display.

[0027] Preferably, the ultrasonic transmitting module includes:

[0028] An impedance matching circuit, electrically connected to the MCU main control module, for matching the impedance value of the impedance matching layer;

[0029] a frequency generating circuit, electrically connected to the impedance matching circuit, for generating initial power for driving the ultrasonic transducer;

[0030] A power amplifying circuit is electrically connected to the frequency generating circuit and is used to amplify the initial power so that the amplified power is sufficient to drive the ultrasonic transducer.

[0031] Preferably, the signal processing module includes:

[0032] a signal amplifying circuit, electrically connected to the ultrasonic transducer, to receive the electrical signal fed back by the ultrasonic transducer and amplify the electrical signal;

[0033] a filtering circuit, electrically connected to the signal amplifying circuit, to receive the amplified electrical signal and perform filtering processing;

[0034] The AD conversion circuit is electrically connected to the filter circuit to receive the electric signal after filtering and perform data processing based on a preset algorithm to form a blood pressure monitoring result.

[0035] According to a second aspect of an embodiment of the present invention, there is provided an ultrasound-based blood pressure monitoring system, comprising:

[0036] The blood pressure monitoring device is used to monitor the user's blood pressure in real time;

[0037] A cloud, wherein the cloud is communicatively connected to the blood pressure monitoring device via a base station to receive and store real-time blood pressure monitoring information from the blood pressure monitoring device;

[0038] The user end is connected to the cloud for communication so as to send a parameter setting request to the cloud and feed back the control parameters returned by the cloud to the blood pressure monitoring device so as to set the parameters of the blood pressure monitoring device.

[0039] Preferably, the cloud is connected to communicate with multiple blood pressure monitoring devices through the base station, and each communication channel is independent of each other.

[0040] According to a third aspect of an embodiment of the present invention, there is provided a blood pressure monitoring method using the above-mentioned blood pressure monitoring system, comprising the following steps:

[0041] Set blood pressure monitoring frequency in the cloud;

[0042] Determining whether the blood pressure monitoring frequency is set successfully;

[0043] If yes, proceed to the next step, if not, issue a communication anomaly alarm;

[0044] controlling an ultrasonic transducer of a blood pressure monitoring device to transmit ultrasonic waves to a target blood vessel of a user;

[0045] Calculating blood pressure in real time using a controller of the blood pressure monitoring device;

[0046] The blood pressure monitoring device displays the blood pressure monitoring results and transmits the data to the cloud for storage until the blood pressure monitoring is completed.

[0047] Ultrasonic waves are re-emitted to the target blood vessel of the user based on the blood pressure monitoring frequency to perform the next blood pressure monitoring.

[0048] Compared with the prior art, the present invention has the following technical effects:

[0049] 1. The flexible wearing portion and the flexible monitoring portion are connected end to end to form a ring. The flexible wearing portion ensures wearing comfort, and the flexible monitoring portion that uses ultrasound to monitor blood pressure ensures the monitoring accuracy of blood pressure data.

[0050] 2. The ultrasonic transducer is divided into two parts, one part is perpendicular to the surface of the human body where it is worn, and the other part is inclined to the surface of the human body where it is worn. They are used to obtain data information such as the diameter, blood vessel type and blood flow rate of the target blood vessel, and then accurately calculate the blood pressure monitoring results of the target blood vessel based on this data information.

[0051] 3. Designing the ultrasonic transducer in an array form facilitates the mapping of blood vessel locations without the need for manual positioning adjustments. This ensures that the ultrasonic energy can cover the target blood vessels (i.e., the ultrasonic energy can hit the target blood vessels), avoiding the tedious operation of changing positions due to inability to find the target blood vessels, thereby improving the convenience and effectiveness of blood pressure monitoring.

[0052] 4. The ring-shaped blood pressure monitoring device on the user's arm can establish a connection and communicate with the cloud through the base station as a bridge, so as to upload the real-time monitoring information of blood pressure to the cloud and store it, so that medical staff or the user's family can download the real-time data from the cloud through the user terminal (such as: local computer, mobile phone, iPad, etc.) to view it. At the same time, relevant parameters can also be set through the user terminal.

[0053] 5. The display on the blood pressure monitoring device does not have a touch function to prevent users from accidentally touching the display and causing errors in the monitoring data. In addition, the monitoring parameters can be set by the cloud according to user needs to achieve parameter changes of the blood pressure monitoring device, that is, how often blood pressure should be measured each day.

[0054] 6. The cloud communicates with multiple blood pressure monitoring devices through a base station, and each communication channel is independent of the others. This allows accurate identification and management of blood pressure data from multiple users, even when multiple users are wearing the ring structure in the same space, to avoid data interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a structural diagram of an ultrasound-based blood pressure monitoring device according to a first embodiment of the present invention;

[0056] FIG2 is a schematic structural diagram of a controller in the first embodiment of the present invention;

[0057] FIG3 is a schematic diagram of the front view of the ultrasonic transducer in the first embodiment of the present invention;

[0058] FIG4 is a schematic side view of the structure of the ultrasonic transducer in the first embodiment of the present invention;

[0059] FIG5 is a schematic diagram of the front view of the ultrasonic transducer in the second embodiment of the present invention;

[0060] FIG6 is a side view schematic diagram of the structure of an ultrasonic transducer in a second embodiment of the present invention;

[0061] FIG7 is a schematic structural diagram of an ultrasound-based blood pressure monitoring system according to a third embodiment of the present invention;

[0062] FIG8 is a flow chart of a blood pressure monitoring method provided by a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0063] The technical content of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0064] The embodiments of the present invention mainly provide a more convenient ultrasonic blood pressure monitoring device and method for clinicians and other practitioners. When the device is placed on the user's preset position (for example, upper arm), the cloud server will communicate with the blood pressure monitoring device, and use the penetration ability of ultrasound to continuously monitor the dynamic changes of human arterial blood vessels and blood flow information in the time domain for 24 hours, thereby displaying the user's blood pressure information on the screen. It can be understood that the blood pressure monitoring device is a 24-hour blood pressure monitoring instrument based on the ultrasonic Doppler effect. It measures peripheral arterial blood pressure through ultrasound and is a non-invasive blood pressure measurement method that can meet the requirements of wearing comfort and measurement accuracy at the same time.

[0065] First embodiment

[0066] As shown in Figure 1, a first embodiment of the present invention provides an ultrasound-based blood pressure monitoring device, comprising a wearable portion 1 and a monitoring portion 2. The wearable portion and the monitoring portion are connected end to end to form a ring. This allows the wearable portion 1 to be used to wear the ring-shaped blood pressure monitoring device on the upper arm, ensuring that the monitoring portion 2 is aligned with the heart, thereby improving the blood pressure monitoring accuracy of the monitoring portion 2.

[0067] In this embodiment, the wearing portion 1 is a detachable, adjustable elastic band that fits the human skin to improve wearing comfort. Preferably, the elastic band is made of a comfortable, flexible material that can fit seamlessly with the human skin. More preferably, the elastic band is made of a retractable material to ensure that users of different body shapes can wear it comfortably. It will be understood that the use of an elastic band as the wearing portion 1 in this embodiment is only a preferred embodiment. In other embodiments, the specific structure of the wearing portion 1 can be adaptively adjusted according to different monitoring scenarios.

[0068] In this embodiment, the monitoring unit 2 includes a display 21, a controller 22, an ultrasonic transducer 23, and a power supply unit 24. The ultrasonic transducer 23 is used to transmit and receive ultrasonic signals, and convert them into electrical signals for signal exchange with the controller 22. The controller 22 is used to control the blood pressure monitoring process as a whole, and to perform data processing based on the electrical signals fed back by the ultrasonic transducer 23 to form blood pressure monitoring results; and the controller 22 is also used to send the blood pressure monitoring results to the display 21, so that the blood pressure monitoring results can be displayed to the user using the display 21. The power supply unit 24 is electrically connected to the display 21, the controller 22, and the ultrasonic transducer 23, respectively, to provide the necessary electrical energy for the three.

[0069] Specifically, in this embodiment, the display 21 is located at the outermost side of the monitoring unit 2 (i.e., the farthest end from the human skin) to display information such as time, network, battery level, and blood pressure data. Since the monitoring unit 2 in this application needs to be in contact with the skin, the display 21 uses an LED soft screen to match the shape of the human arm. Furthermore, preferably, to prevent the user from accidentally touching the display and affecting the display results, the LED soft screen does not have a touch function and only displays the image.

[0070] The controller 22 is located on the inner side of the display 21 (i.e., the side close to the human skin) to control the transmission and reception of ultrasonic signals, the calculation of blood pressure data, and communication control. Specifically, as shown in Figure 2, the controller 22 includes an MCU main control module 221, an ultrasonic transmitter module 222, and a signal processing module 223. Among them, the MCU main control module 221 is used for blood pressure monitoring control. The input end of the ultrasonic transmitter module 222 is electrically connected to the MCU main control module 221, and the output end is electrically connected to the ultrasonic transducer 23, so that the ultrasonic transmitter module can receive the control signal of the MCU main control module 221 and drive the ultrasonic transducer 23 to transmit ultrasonic waves to the target blood vessel. The input end of the signal processing module 223 is electrically connected to the ultrasonic transducer 23, and the output end is electrically connected to the MCU main control module 221, so that the signal processing module 223 can receive the electrical signal fed back by the ultrasonic transducer 23 and perform data processing, thereby forming a blood pressure monitoring result, and feeding the blood pressure monitoring result back to the MCU main control module 221. In addition, the MCU main control module 221 is electrically connected to the display 21 to send the blood pressure monitoring result to the display 21 for screen display.

[0071] In the above embodiment, the ultrasonic transmitting module specifically includes an impedance matching circuit, a frequency generating circuit, and a power amplifier circuit. The impedance matching circuit is electrically connected to the MCU main control module 221 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 to generate the initial power to drive the ultrasonic transducer 23. The power amplifier circuit is electrically connected to the frequency generating circuit to amplify the initial power so that the amplified power is sufficient to drive the ultrasonic transducer 23.

[0072] In the above embodiment, specifically, the signal processing module includes a signal amplification circuit, a filtering circuit, and an AD conversion circuit. The signal amplification circuit is electrically connected to the ultrasonic transducer 23 to receive the electrical signal fed back by the ultrasonic transducer and amplify the electrical signal. The filtering circuit is electrically connected to the signal amplification circuit to receive the amplified electrical signal and perform filtering processing. The AD conversion circuit is electrically connected to the filtering circuit to receive the filtered electrical signal and perform data processing based on a preset algorithm (described in detail below based on the specific structure of the ultrasonic transducer 23) to generate blood pressure monitoring results.

[0073] The ultrasonic transducer 23 is located on the inner side of the controller 22 (i.e., the side closest to the human skin) and includes a first ultrasonic transducer and a second ultrasonic transducer. The first ultrasonic transducer is arranged along a first direction to transmit or receive a first ultrasonic wave perpendicular to the human upper arm (i.e., perpendicular to the skin surface of the human upper arm). The second ultrasonic transducer is arranged along a second direction to transmit or receive a second ultrasonic wave oblique to the human upper arm (i.e., forming a certain angle with the human upper arm).

[0074] Specifically, as shown in Figures 3 and 4, in this embodiment, the ultrasonic transducer 23 includes a flexible PCB 231, an impedance matching layer 232, and a set of piezoelectric ceramic elements 233. The flexible PCB 231 is bent into an isosceles trapezoid. When worn, the parallel short sides of the isosceles trapezoid are parallel to the skin surface of the upper arm, and the waist of the isosceles trapezoid forms a preset angle with the surface of the wearer's body. In this embodiment, the preset angle is preferably 20 to 60 degrees. The impedance matching layer 232 is disposed at the bottom of the flexible PCB 231 to form the parallel long sides of the isosceles trapezoid. Furthermore, the impedance matching layer 232 uses a coupling agent (commonly used silicone or ultrasound gel) close to the human body's resistance. By matching the ultrasonic resistance, the generation and transmission of the signal waveform are not deformed, ensuring signal transmission accuracy and improving the accuracy of the monitoring data. In addition, the impedance matching layer 232 is flexible and can seamlessly adhere to the human skin.

[0075] In this embodiment, three piezoelectric ceramic elements 233 form a group, and all three piezoelectric ceramic elements 233 are positioned inside an isosceles trapezoid. One piezoelectric ceramic element 233 is positioned perpendicular to the parallel short sides of the isosceles trapezoid, collaborating with the flexible PCB 231 and impedance matching layer 232 to form a first ultrasonic transducer. The other two piezoelectric ceramic elements 233 are symmetrically distributed along the two waist sides of the isosceles trapezoid, collaborating with the flexible PCB 231 and impedance matching layer 232 to form a second ultrasonic transducer.

[0076] 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 to receive the electrical signal fed back by the first ultrasonic transducer or the second ultrasonic transducer. The controller 22 obtains the blood vessel thickness and type based on the electrical signal fed back by the first ultrasonic transducer, and obtains the blood flow rate within the blood vessel based on the electrical signal fed back by the second ultrasonic transducer, thereby calculating the blood pressure monitoring result of the blood vessel by combining the blood vessel thickness, blood vessel type, and blood flow rate. The specific working process is as follows:

[0077] (1) Obtaining blood vessel diameter and type

[0078] Specifically, the target area is imaged by transmitting and receiving ultrasonic waves using piezoelectric ceramic elements 233, which are positioned perpendicular to the parallel short sides of an isosceles trapezoid. When the ultrasonic signal reaches the target blood vessel, it is reflected and refracted by the anterior and posterior walls, respectively. By analyzing the time difference between the ultrasonic wave's arrival at the anterior and posterior walls, the vessel's diameter and its changes during the heartbeat can be determined. This allows for the successful differentiation of arteries from veins by analyzing the differences in diameter changes between arteries and veins during a normal heartbeat.

[0079] (2) Obtaining blood flow rate

[0080] Specifically, two piezoelectric ceramic elements 233, symmetrically distributed along the two sides of an isosceles trapezoid, transmit continuous high-frequency ultrasound waves into the blood vessels. The incident ultrasound waves are reflected by flowing blood cells, and the frequency of the reflected echo signal changes, forming a Doppler blood flow frequency shift signal. This Doppler blood flow frequency shift signal has a linear relationship with the blood cell velocity component in the direction of sound wave propagation. Leveraging this linear relationship, spectrum analysis of the Doppler blood flow frequency shift signal can measure the blood flow velocity in the direction of sound wave propagation.

[0081] Furthermore, it can be understood that in this embodiment, the two piezoelectric ceramic elements 233 on the two waist sides of the isosceles trapezoid are arranged at 20° to 60° in order to facilitate the use of Doppler frequency shift to measure the blood flow rate. In other embodiments, the size of the angle can be adaptively adjusted according to actual needs.

[0082] It is understandable that the above data (ie, blood vessel diameter, blood vessel type, and blood flow rate) need to be calibrated by an algorithm before use to ensure data accuracy.

[0083] In summary, the ultrasound-based blood pressure monitoring device provided by the first embodiment of the present invention can perfectly cover the blood vessels to be measured by placing a flexible ultrasonic transducer on the user's upper arm. The inverse piezoelectric effect of the piezoelectric material inside the flexible ultrasonic transducer is utilized, and the excitation effect is achieved by designing a circuit that matches the flexible ultrasonic transducer. A part of the flexible ultrasonic transducer is arranged vertically to identify blood vessels, measure blood vessel diameters, and distinguish between arterial and venous blood vessels; the other part is arranged at a preset tilt angle to facilitate the use of Doppler frequency shift to measure the blood flow rate. Therefore, the above data can be corrected by an algorithm to obtain the blood flow velocity, diameter, and blood vessel type of the blood vessel, so that the flow rate of the target blood vessel can be calculated, and then the pressure of the blood vessel can be calculated.

[0084] Second embodiment

[0085] Based on the first embodiment described above, the second embodiment of the present invention provides another ultrasound-based blood pressure monitoring device. This blood pressure monitoring device includes a wearable portion 1 and a monitoring portion 2. Compared to the first embodiment, the ultrasonic transducer 23 in this embodiment is in array form.

[0086] Specifically, as shown in Figures 5 and 6, the flexible PCB 231 is bent along its length into m isosceles trapezoids. An impedance matching layer 232 is provided at the bottom of the flexible PCB 231 to form multiple isosceles trapezoidal mounting areas 230. Each isosceles trapezoidal mounting area 230 is equipped with n groups of piezoelectric ceramic elements 233 along the width of the flexible PCB 231, thereby forming an m*n rectangular array of ultrasonic transducers 23.

[0087] It can be understood that by forming the ultrasonic transducer 23 into an array form to facilitate drawing a blood vessel position map, there is no need to manually adjust the positioning, which can ensure that the ultrasonic energy can cover the target blood vessel (i.e., the ultrasonic energy can hit the target blood vessel), avoiding the tedious operation of changing the position due to the inability to find the target blood vessel, thereby improving the convenience and effectiveness of blood pressure monitoring.

[0088] Except for the above differences, the rest of the structure of this embodiment is the same as that of the first embodiment and will not be described again here.

[0089] Third embodiment

[0090] Based on the first or second embodiment described above, the third embodiment of the present invention provides an ultrasound-based blood pressure monitoring system. As shown in FIG7 , the blood pressure monitoring system includes a blood pressure monitoring device 10 , a base station 20 , a cloud 30 , and a user terminal 40 .

[0091] Specifically, the blood pressure monitoring device 10 is used to monitor a user's blood pressure in real time. The cloud 30 is connected to the blood pressure monitoring device 10 via the base station 20 to receive and store real-time blood pressure monitoring information from the blood pressure monitoring device 10. The user terminal 40 is connected to the cloud 30 to send parameter setting requests to the cloud 30 and feed back the control parameters returned by the cloud 30 to the blood pressure monitoring device 10 to configure the parameters of the blood pressure monitoring device 10.

[0092] It is understandable that in this embodiment, the ring-shaped blood pressure monitoring device 10 on the user's arm establishes a connection and communicates with the cloud 30 through the base station 20 as a bridge, so as to upload the real-time monitoring information of the blood pressure to the cloud and store it. Medical staff or the user's family can download the real-time data of the cloud 30 through the user terminal 40 (for example: a local computer, mobile phone, iPad, etc.) and view it. At the same time, relevant parameters can also be set through the user terminal 40. Specifically, to prevent the user from accidentally touching the screen, the monitoring parameters are set by the cloud 30. The user terminal 40 sends a parameter setting request to the cloud 30. The cloud 30 returns the control parameters to the user terminal 40 based on the parameter setting request. The user terminal 40 feeds back the control parameters to the MCU control module of the blood pressure monitoring device 10, thereby realizing the parameter change of the blood pressure monitoring device 10. Without loss of generality, this parameter is the blood pressure monitoring frequency, that is, how often the blood pressure is measured every day.

[0093] Furthermore, in this embodiment, the cloud 30 communicates with multiple blood pressure monitoring devices 10 via the base station 20, and each communication channel is independent of the others. This allows accurate identification and management of blood pressure data from different users, even when multiple users are wearing the ring structure in the same space, avoiding data interference.

[0094] Fourth embodiment

[0095] As shown in FIG8 , based on the third embodiment described above, the fourth embodiment of the present invention further provides a blood pressure monitoring method, which specifically includes steps S1 to S7:

[0096] S1: Set the blood pressure monitoring frequency in the cloud 30.

[0097] S2: Determine whether the blood pressure monitoring frequency is set successfully.

[0098] S3: If yes, proceed to the next step; if no, issue a communication abnormality alarm.

[0099] S4: Control the ultrasonic transducer 23 of the blood pressure monitoring device 10 to transmit ultrasonic waves to the target blood vessel of the user.

[0100] S5: Calculate the blood pressure in real time using the controller 22 of the blood pressure monitoring device 10 .

[0101] S6: The display 21 of the blood pressure monitoring device 10 displays the blood pressure monitoring result of this time, and transmits the data to the cloud 30 for storage until the blood pressure monitoring of this time is completed.

[0102] S7: Re-transmitting ultrasonic waves to the target blood vessels of the user based on the blood pressure monitoring frequency for the next blood pressure monitoring.

[0103] It can be understood that the blood pressure monitoring method can achieve 24-hour uninterrupted blood pressure monitoring, and the ring-shaped blood pressure monitoring device 10 will not affect the user's normal life. It can not only ensure the comfort of wearing, but also monitor the user's blood pressure status in real time and accurately.

[0104] It should be noted that the above embodiments are only examples, and the technical solutions of the various embodiments can be combined and are all within the protection scope of the present invention.

[0105] It should be understood that the terms "thickness", "depth", "up", "down", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0107] The ultrasonic blood pressure monitoring device, system, and method provided by the present invention are described in detail above. Any obvious modification made to the present invention without departing from its essence would constitute an infringement of the present invention's patent rights and would incur corresponding legal liability.

Claims

1. An ultrasonic blood pressure monitoring device, characterized in that It comprises a wearing part for being worn on a human body and a monitoring part for monitoring blood pressure, wherein the wearing part and the monitoring part are connected end to end to form a ring; Wherein, the monitoring unit comprises: A display, located at the outermost side of the monitoring unit, for displaying blood pressure monitoring results; A controller, located inside the display, for controlling the sending and receiving of ultrasonic signals, the calculation of blood pressure data, and communication control; An ultrasonic transducer is located on the inner side of the display, and includes a first ultrasonic transducer and a second ultrasonic transducer; wherein the first ultrasonic transducer is arranged along a first direction to transmit or receive a first ultrasonic wave in a direction perpendicular to a part of a human body where the device is worn; and the second ultrasonic transducer is arranged along a second direction to transmit or receive a second ultrasonic wave in a direction oblique to a part of a human body where the device is worn; A power supply unit, located inside the display and electrically connected to the display, the controller and the ultrasonic transducer, respectively, for providing electrical energy; Wherein, the controller is electrically connected to the ultrasonic transducer to control the ultrasonic transducer to emit the first ultrasonic wave or the second ultrasonic wave, and receive the electrical signal fed back by the first ultrasonic transducer unit or the second ultrasonic transducer unit; the controller obtains the blood vessel thickness and blood vessel type based on the electrical signal fed back by the first ultrasonic transducer unit, and obtains the blood flow rate in the blood vessel based on the electrical signal fed back by the second ultrasonic transducer unit, so as to calculate the blood pressure monitoring result of the blood vessel by comprehensively considering the blood vessel thickness, blood vessel type and blood flow rate; the controller is also electrically connected to the display to send the blood pressure monitoring result to the display.

2. The blood pressure monitoring device according to claim 1, characterized in that The ultrasonic transducer comprises: The flexible PCB is bent into an isosceles trapezoid, wherein the parallel short sides of the isosceles trapezoid are parallel to the surface of the part where the wearer is on the human body, and the waist side of the isosceles trapezoid forms a preset angle with the surface of the part where the wearer is on the human body; An impedance matching layer is arranged at the bottom of the flexible PCB board to form parallel long sides of the isosceles trapezoid, and the resistance value of the impedance matching layer is close to the resistance value of the human body; A group of piezoelectric ceramic elements are arranged on the inner side of the isosceles trapezoid; wherein a part of the piezoelectric ceramic elements are symmetrically distributed on the parallel short sides of the isosceles trapezoid to cooperate with the flexible PCB board and the impedance matching layer to form the first ultrasonic transducer; another part of the piezoelectric ceramic elements are symmetrically distributed on the two waist sides of the isosceles trapezoid to cooperate with the flexible PCB board and the impedance matching layer to form the second ultrasonic transducer.

3. The blood pressure monitoring device according to 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 cooperate with the flexible PCB to form a plurality of isosceles trapezoidal installation areas; A plurality of groups of piezoelectric ceramic elements are installed in each of the isosceles trapezoidal installation areas along the width direction of the flexible PCB board, so that the ultrasonic transducers form a rectangular array.

4. The blood pressure monitoring device according to claim 3, wherein: The preset angle is between 20° and 60°.

5. The blood pressure monitoring device according to claim 2, characterized in that The control unit includes: MCU main control module for blood pressure monitoring and control; An ultrasonic transmitting module, the input end of which is electrically connected to the MCU main control module, and the output end of which is electrically connected to the ultrasonic transducer; the ultrasonic transmitting module is used to receive the control signal of the MCU main control module and drive the ultrasonic transducer to transmit ultrasonic waves to the target blood vessel; A signal processing module, the input end of which is electrically connected to the ultrasonic transducer, and the output end of which is electrically connected to the MCU main control module; the signal processing module is used to receive the electrical signal fed back by the ultrasonic transducer and perform data processing to feed back the blood pressure monitoring result to the MCU main control module; Wherein, the MCU main control module is electrically connected to the display so as to send the blood pressure monitoring result to the display.

6. The blood pressure monitoring device according to claim 5, characterized in that The ultrasonic transmitting module comprises: An impedance matching circuit, electrically connected to the MCU main control module, for matching the impedance value of the impedance matching layer; A frequency generating circuit, electrically connected to the impedance matching circuit, for forming an initial power for driving the ultrasonic transducer; The power amplifier circuit is electrically connected to the frequency generating circuit and is used to amplify the initial power so that the amplified power is sufficient to drive the ultrasonic transducer.

7. The blood pressure monitoring device according to claim 1, characterized in that The signal processing module comprises: A signal amplifying circuit, electrically connected to the ultrasonic transducer, to receive the electrical signal fed back by the ultrasonic transducer and amplify the electrical signal; A filtering circuit is electrically connected to the signal amplifying circuit to receive the amplified electrical signal and perform filtering processing; The AD conversion circuit is electrically connected to the filter circuit to receive the electric signal after filtering and perform data processing based on a preset algorithm to form a blood pressure monitoring result.

8. An ultrasound-based blood pressure monitoring system, characterized in that include: The blood pressure monitoring device according to any one of claims 1 to 7, used for real-time blood pressure monitoring of a user; A cloud, wherein the cloud is connected to the blood pressure monitoring device through a base station to receive and store real-time blood pressure monitoring information of the blood pressure monitoring device; The user end is connected to the cloud for communication so as to send a parameter setting request to the cloud and feed back the control parameters returned by the cloud to the blood pressure monitoring device so as to set the parameters of the blood pressure monitoring device.

9. The blood pressure monitoring system according to claim 8, wherein: The cloud is respectively connected to communicate with a plurality of blood pressure monitoring devices through the base station, and each communication channel is independent of each other.

10. A blood pressure monitoring method, implemented using the blood pressure monitoring system according to claim 8 or 9, characterized in that The steps include: Set blood pressure monitoring frequency in the cloud; Determining whether the blood pressure monitoring frequency is set successfully; If yes, proceed to the next step, if no, issue a communication abnormality alarm; controlling an ultrasonic transducer of a blood pressure monitoring device to transmit ultrasonic waves to a target blood vessel of a user; Calculating blood pressure in real time using a controller of the blood pressure monitoring device; The blood pressure monitoring result is displayed on the display of the blood pressure monitoring device, and the data is transmitted to the cloud for storage until the blood pressure monitoring is completed; Ultrasonic waves are re-emitted to the target blood vessel of the user based on the blood pressure monitoring frequency to perform the next blood pressure monitoring.

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