CN212261359U - Ultrasonic wave double entry sphygmomanometer - Google Patents
Ultrasonic wave double entry sphygmomanometer Download PDFInfo
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- CN212261359U CN212261359U CN202022353335.5U CN202022353335U CN212261359U CN 212261359 U CN212261359 U CN 212261359U CN 202022353335 U CN202022353335 U CN 202022353335U CN 212261359 U CN212261359 U CN 212261359U
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Abstract
The utility model belongs to the technical field of the medical treatment detects, concretely relates to ultrasonic wave double entry electronic sphygmomanometer, be equipped with the adapter on its characterized in that cladding body, the adapter passes through audio conditioning circuit and CPU signal connection, and audio conditioning circuit includes adapter plug, transient suppression diode, high frequency filter resistance, high frequency filter electric capacity and operational amplifier, and high frequency filter resistance, transient suppression diode and high frequency filter electric capacity establish ties the back and the parallelly connected setting of high frequency filter resistance between adapter plug and operational amplifier. The utility model has the advantages of the measuring result stability is good, the practicality is strong.
Description
Technical Field
The utility model belongs to medical treatment detection device field, concretely relates to ultrasonic wave double entry electronic sphygmomanometer.
Background
The blood pressure is an important physiological parameter of a human body, can reflect the working function of a circulatory system of the human body, can know the self blood pressure value through blood pressure measurement, can better know the self health condition, and effectively carries out self-regulation. The blood pressure refers to the pressure of blood in blood vessels on the walls of the blood vessels, the blood can be delivered to every part of a human body just because of the action of the blood pressure, the blood pressure is a variable quantity and changes periodically along with the beating of the heart, and when the heart contracts, the blood is injected into the artery, so that the blood pressure is increased; when the heart relaxes, blood flows back to the heart and the blood pressure decreases. Generally, the blood pressure level refers to the variation range of the blood pressure, not all the blood pressure levels in the whole heart cycle, the blood pressure measurement results in the systolic pressure and the diastolic pressure, the systolic pressure is the maximum value of the blood pressure during the systole, the diastolic pressure is the minimum value during the diastole, and the unit of the blood pressure value is generally mm Hg (millimeter Hg).
With the development of society and the increasing living standard of people, people pay more and more attention to the physical health of the people and family members. The increase of the incidence rate of hypertension enables the electronic sphygmomanometer to be taken into the life of people and become one of indispensable household appliances for many people, and the electronic sphygmomanometer brings convenience for early detection of hypertension and monitoring of treatment effect.
The auscultatory method (Korotkoff method) was proposed by the russian doctor Korotkoff (Korotkoff) in 1905, and one of the most clinically used blood pressure measurement methods at present is the standard for measuring blood pressure. The auscultation method is characterized in that the cuff is an expandable sealing bag, a liquid bag is arranged in the inflatable sealing bag and is connected with a mercury column, the other air bag is connected with an inflatable ball, the cuff is bound on the upper arm of the right hand, the stethoscope is placed on an arterial blood vessel and is inflated and pressurized until the brachial artery is deflated, the blood vessel is completely blocked, the pressure of blood on the blood vessel pushes the mercury column upwards through the liquid bag, the mercury column has a certain height, the blood vessel is completely blocked when the stethoscope can not hear pulse sound completely, then air in the compressed air bag is released slowly, the pressure of the cuff can be gradually reduced along with the reduction of pressure-bearing air, when the pressure is reduced to that blood can flow, the sound of the blood flowing in the blood vessel can be heard from the stethoscope, the indication of the pressure of mercury when the sound can be heard for the first time is systolic pressure, the heard sound is korotkoff type sound, the pressure of the cuff is reduced continuously, the stethoscope can hear the sound getting bigger and bigger to the maximum, then because the stethoscope reduces with skin pressure gradually, when the sound gets to the minimum until the measurer can not hear the moment at all that the blood vessel is fully opened, the registration of mercury post is the diastolic pressure. From the process and details of the measurement, it is clear that the auscultatory method has the advantages of accurate measurement, but has many disadvantages:
1) the reaction and proficiency of the measurer influence the measurement result, the measurer needs to constantly observe the mercury pressure gauge, listen and discharge air, and the reaction time and proficiency of each person are different, so that human errors are caused.
2) Different people have different hearing abilities, vision abilities and reading estimating abilities, and the reading is different when distinguishing and selecting the characteristic sound.
3) The deflation speed during the measurement process also has an influence on the accuracy of the measurement data.
Therefore, electronic blood pressure meters have been developed in the industry. However, the conventional electronic sphygmomanometer has the defect of unstable measurement data.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ultrasonic wave double entry electronic sphygmomanometer, it increases the pickup function on traditional electronic sphygmomanometer's basis, has simplified the design of procedure, has improved measuring result's stability, has strengthened the practicality.
The utility model discloses a realize through following technical scheme:
the ultrasonic duplex electronic sphygmomanometer comprises a coating body, a charging and discharging control device, an ultrasonic transmitting device, an ultrasonic receiving device and a CPU, and is characterized in that a pickup is arranged on the coating body and is in signal connection with the CPU through an audio conditioning circuit, the audio conditioning circuit comprises a pickup plug, a transient suppression diode, a high-frequency filter resistor, a high-frequency filter capacitor and an operational amplifier, and the high-frequency filter resistor is connected in parallel with the high-frequency filter resistor after the transient suppression diode is connected in series with the high-frequency filter capacitor and is arranged between the pickup plug and the operational amplifier.
The utility model discloses adapter on the cladding body passes through the adapter plug and links to each other with audio frequency conditioning circuit, and the transient state restraines the diode and prevents to appear disturbing peak value, and high frequency filter resistance, high frequency filter capacitance filter the high frequency composition in the adapter, then send CPU's AD input, and CPU can carry out digital processing and analysis to this signal.
The utility model discloses increase adapter and audio frequency management circuit on the basis of the sphygmomanometer that CN201610916421.8 disclosed.
The utility model discloses an element is prior art mature product on sale among adapter and the audio conditioning circuit. The pickup model is COTT-S30.
The utility model discloses a cladding body is prior art product, and its inside is equipped with gas pressure sensor, air pump, constant speed discharge valve and solenoid valve, and gas pressure sensor's signal is transmitted to CPU, CPU model STM32F103RCT6 after signal conditioning, data acquisition.
When the cladding body is inflated, the air pump inflates the cladding body, the pressure of the cladding body is increased, and when the pressure of the cladding body is greater than the contraction pressure, blood cannot flow, and the inflation is stopped. Then the air is discharged through a constant-speed exhaust valve and an electromagnetic valve, and the pressure of the cladding body is gradually reduced. The pressure of the cladding is detected by an air pressure sensor in the process of increasing and then decreasing the pressure of the cladding, and the air pressure sensor commonly used for blood pressure measurement is MPS20N 0040D.
The blood pressure monitoring method of the utility model comprises the following steps:
1) binding the cladding body on the upper arm of the right hand, inflating the cladding body through an inflation and deflation control device, detecting an output signal of the audio conditioning circuit by the CPU, starting the ultrasonic transmitting device to transmit ultrasonic waves for detection, and receiving a return signal of the ultrasonic receiving device;
2) the cladding body is inflated and pressurized until the brachial artery is deflated, at the moment, the blood vessel is completely blocked, the output signal of the audio conditioning circuit is smaller than a set value (the typical value is 20mv), and the blood vessel is completely blocked when the blood flow cannot be detected by ultrasonic waves, and the cladding body is deflated by the inflation and deflation control device;
3) when the cladding enters the air release process, the blood flow signal obtained by the sound pick-up is subjected to integral operation according to a set time window (2 s); when the integral value is greater than a set threshold (typical value 1000), it is considered that a korotkoff sound is detected;
4) after the first monitoring finds the Korotkoff sound, detecting the difference between the frequency of the ultrasonic reflection signal and the frequency of the ultrasonic emission signal, and calculating the blood pressure value by using the difference;
5) calculating blood pressure values once every a period of time, and sequentially storing the blood pressure values in a memory of the CPU;
6) when the fact that the Korotkoff sounds disappear is monitored, and the maximum value of the blood flow speed is detected by ultrasonic waves, the deflation is finished, the first measured value is the systolic pressure, and the last measured value is the diastolic pressure in the memory of the CPU.
As a preferred embodiment: filtering by using FFT or STFT or wavelet algorithm before integration in the time window in the step 3).
As a preferred embodiment: and 5) calculating the sequential blood pressure values every 1s in the step 5).
The utility model discloses the principle of ultrasonic detection blood pressure is with CN 201610916421.8.
The utility model discloses the principle that the adapter used is as follows:
1) when the pressure of the coating body is greater than the systolic pressure, the arterial blood flow is blocked, and the sound pick-up in the coating body can hardly detect pulse waves;
2) as the pressure of the coating body is gradually reduced, the blood flow is gradually recovered, and the amplitude of the pulse wave detected by the sound pick-up in the coating body is increased;
3) when the pressure of the coating body is equal to the average pressure, the blood vessel is completely in an open state, and the amplitude of the pulse wave detected by the sound pickup in the coating body reaches the maximum value;
4) when the pressure of the coating body is gradually reduced from the average pressure, the loose contact between the coating body and the arm is caused, and the pulse wave amplitude value detected by the sound pickup in the coating body is gradually reduced.
The CPU can adopt a digital algorithm to calculate the wave amplitude, pulse width and other parameters of each pulse wave amplitude value and parameters or criteria during blood pressure calculation.
The utility model has the advantages of the measuring result stability is good, the practicality is strong.
Drawings
FIG. 1 is a schematic block diagram of the structure of the present invention;
FIG. 2 is a schematic block diagram of the structure of the inflation/deflation device of the present invention;
fig. 3 is a corresponding graph of the pressure of the coating and the signal of the pickup according to the present invention;
fig. 4 is a schematic circuit diagram of the audio conditioning circuit of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
As shown in fig. 1: the cladding body is internally provided with a pickup, an ultrasonic transmitting probe and an ultrasonic receiving probe, the cladding body is in signal connection with a CPU through an air charging and discharging control device, the pickup is in audio conditioning short circuit, the ultrasonic transmitting probe is in signal connection with the CPU through an ultrasonic transmitting device and an ultrasonic receiving probe through an ultrasonic receiving device, and the CPU is also connected with a power supply, an LCD display and a keyboard.
As shown in fig. 2: the structure of the cladding body is the prior art, and is internally provided with a gas pressure sensor, an air pump, a constant-speed exhaust valve and an electromagnetic valve, and signals of the gas pressure sensor are transmitted to a CPU after signal conditioning and data acquisition.
As shown in fig. 4: the transient suppression diode TVS1 and the high-frequency filter capacitor C7 of the audio conditioning circuit are connected in series and then connected in parallel with the high-frequency filter resistor R13 to be arranged between the pickup plug H2 and the operational amplifier LM 324.
The utility model discloses examine time measuring step as follows:
1) binding the cladding body on the upper arm of the right hand, inflating the cladding body through an inflation and deflation control device, detecting an output signal of the audio conditioning circuit by the CPU, starting the ultrasonic transmitting device to transmit ultrasonic waves for detection, and receiving a return signal of the ultrasonic receiving device;
2) the cladding body is inflated and pressurized until the brachial artery is deflated, at the moment, the blood vessel is completely blocked, the output signal of the audio conditioning circuit is less than 20mv, and the blood flow cannot be detected by ultrasonic waves, which indicates that the blood vessel is completely blocked, and the cladding body is deflated by the inflation and deflation control device;
3) when the cladding body enters the air release process, the blood flow signal obtained by the sound pick-up is subjected to integral operation according to a time window (2 s); when the integral value is greater than a set threshold (1000), it is considered that a korotkoff sound is detected, and filtering is performed using FFT or STFT or wavelet algorithm before integration is performed within the time window.
4) After the first monitoring finds the Korotkoff sound, detecting the difference between the frequency of the ultrasonic reflection signal and the frequency of the ultrasonic emission signal, and calculating the blood pressure value by using the difference;
5) calculating blood pressure values every 1s, and sequentially storing the blood pressure values in a memory of the CPU;
6) when the fact that the Korotkoff sounds disappear is monitored, and the maximum value of the blood flow speed is detected by ultrasonic waves, the deflation is finished, the first measured value is the systolic pressure, and the last measured value is the diastolic pressure in the memory of the CPU.
It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Such as radar waves instead of ultrasound waves.
Claims (1)
1. The ultrasonic duplex electronic sphygmomanometer comprises a coating body, a charging and discharging control device, an ultrasonic transmitting device, an ultrasonic receiving device and a CPU (central processing unit), and is characterized in that a pickup is arranged on the coating body and is in signal connection with the CPU through an audio conditioning circuit, the audio conditioning circuit comprises a pickup plug, a transient suppression diode, a high-frequency filter resistor, a high-frequency filter capacitor and an operational amplifier, and the high-frequency filter resistor, the transient suppression diode and the high-frequency filter capacitor are connected in series and then are connected in parallel with the high-frequency filter resistor between the pickup plug and the operational amplifier.
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| CN202022353335.5U CN212261359U (en) | 2020-10-21 | 2020-10-21 | Ultrasonic wave double entry sphygmomanometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112155538A (en) * | 2020-10-21 | 2021-01-01 | 山东吉联电气科技有限公司 | Ultrasonic compound electronic sphygmomanometer and blood pressure detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112155538A (en) * | 2020-10-21 | 2021-01-01 | 山东吉联电气科技有限公司 | Ultrasonic compound electronic sphygmomanometer and blood pressure detection method thereof |
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