CN113080910B - Blood pressure measuring device and sphygmomanometer - Google Patents
Blood pressure measuring device and sphygmomanometer Download PDFInfo
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- CN113080910B CN113080910B CN202110344455.5A CN202110344455A CN113080910B CN 113080910 B CN113080910 B CN 113080910B CN 202110344455 A CN202110344455 A CN 202110344455A CN 113080910 B CN113080910 B CN 113080910B
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- 230000036772 blood pressure Effects 0.000 title claims abstract description 70
- 238000012545 processing Methods 0.000 claims abstract description 58
- 230000005236 sound signal Effects 0.000 claims abstract description 24
- 210000001367 artery Anatomy 0.000 claims abstract description 8
- 238000011946 reduction process Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 12
- 238000009530 blood pressure measurement Methods 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 4
- 210000004712 air sac Anatomy 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000002555 auscultation Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 230000035488 systolic blood pressure Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000035487 diastolic blood pressure Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 244000304217 Brassica oleracea var. gongylodes Species 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02108—Measuring pressure in heart or blood vessels from analysis of pulse wave characteristics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/0225—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Ophthalmology & Optometry (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention provides a blood pressure measuring device and a blood pressure meter, wherein a processing module is used for controlling an inflation and deflation module to inflate and deflate a first air bag and a second air bag; the air-saving pipe is used for controlling the inflation and deflation speed of the first air bag; the first sensor and the second sensor are respectively used for collecting pressure signals in the two air bags, the sound sensor is used for collecting pulse sound signals applied to the artery of the person to be tested in the pressure reduction process, and the processing module is also used for determining the blood pressure value based on analysis processing of the pulse sound signals and the pressure signals. In the blood pressure measuring device, the first sensor and the second sensor are respectively connected with the first air bag and the second air bag, and the air passage of the first sensor and the air passage of the second sensor can be kept relatively independent through the arrangement of the air-saving pipe, so that the air flow in the air passage of the first sensor is reduced, the air flow velocity is slowed down, the air flow noise is reduced, the acquisition precision of the sound sensor to pulse sound signals can be improved, and the measurement precision of the blood pressure value is further improved.
Description
Technical Field
The invention relates to the technical field of blood pressure measurement, in particular to a blood pressure measuring device and a blood pressure meter.
Background
The sphygmomanometer is a main tool for measuring blood pressure, and comprises a Mic sound sensor and a pressure sensor in some sphygmomanometers, wherein the Mic sound sensor can be used for collecting pulse sounds, the pressure sensor can be used for collecting pressure values in an air bag, in the related art, the sphygmomanometer mostly adopts a single air pump, and the Mic sound sensor and the pressure sensor share the same air channel, the same air bag and the same inflation and deflation unit.
Disclosure of Invention
The invention aims to provide a blood pressure measuring device and a blood pressure meter, which are used for improving the acquisition accuracy of pulse sound signals and further improving the measurement accuracy of blood pressure values.
The invention provides a blood pressure measuring device, which comprises: the device comprises a first air bag, a second air bag, an air saving pipe, a first sensor, a second sensor, a sound sensor, an inflation and deflation module and a processing module; the first end of the first sensor is respectively connected with the first end of the sound sensor, the first end of the throttle pipe and the first air bag; the second end of the air-saving pipe is connected with the first end of the inflation and deflation module, the first end of the second sensor and the second air bag; the processing module is respectively connected with the second end of the first sensor, the second end of the sound sensor, the second end of the inflation and deflation module and the second end of the second sensor; the processing module is used for controlling the inflation and deflation module to inflate and deflate the first air bag and the second air bag; the throttle pipe is used for controlling the inflation and deflation speeds of the first air bag; the first sensor is used for collecting a first pressure signal in the first air bag and sending the first pressure signal to the processing module; the second sensor is used for acquiring a second pressure signal in the second air bag and sending the second pressure signal to the processing module; the sound sensor is used for collecting pulse sound signals applied to the artery of the person to be tested in the pressure reduction process and sending the pulse sound signals to the processing module; the processing module is further configured to determine a blood pressure value based on the pulse tone signal, the first pressure signal, and the second pressure signal.
Further, the first end of the first sensor, the first end of the sound sensor, the first end of the throttle pipe and the first air bag are connected through a first four-way joint; the second end of the air-saving pipe, the first end of the air charging and discharging module, the first end of the second sensor and the second air bag are connected through a second four-way joint.
Further, the ratio of the width of the first bladder to the width of the second bladder includes 1:3 and 2:7.
Further, the diameter of the circular hole of the air-saving pipe is related to the volume ratio of the first air bag to the second air bag; the smaller the volume ratio is, the smaller the diameter of the circular hole of the air-saving pipe is.
Further, the circular hole diameter of the air-saving pipe comprises: 0.1mm.
Further, the device further comprises a cuff; the cuff includes the first balloon and the second balloon therein.
Further, the device also comprises a cylinder; the second end of the air-saving pipe is connected with the first end of the air charging and discharging module through the air cylinder; the cylinder is used for buffering air flow when the inflation and deflation module inflates and deflates the first air bag and the second air bag.
Further, the inflation and deflation module comprises: an air pump, a quick air release valve and a uniform air release valve; the air outlet end of the air pump, the first end of the quick air release valve and the first end of the uniform air release valve are respectively connected with the air cylinder; the control end of the air pump, the second end of the quick air release valve and the second end of the uniform air release valve are respectively connected with the processing module; the air pump is used for receiving the inflation signals output by the processing module and inflating the first air bag and the second air bag based on the inflation signals; the constant-speed air release valve is used for receiving a constant-speed air release signal output by the processing module, and based on the constant-speed air release signal, the first air bag is released according to a first preset speed, and the second air bag is released according to a second preset speed; the rapid deflation valve is used for receiving a rapid deflation signal output by the processing module, based on the rapid deflation signal, the first air bag is deflated according to a third preset speed, and the second air bag is deflated according to a fourth preset speed.
Further, the device further comprises: a gas rectification module; the air inlet end of the air pump is connected with the air rectifying module, and the air rectifying module is used for converting input air flow into gentle air flow and conveying the gentle air flow to the air inlet end of the air pump.
The invention provides a sphygmomanometer, which comprises a display module and a blood pressure measuring device, wherein the blood pressure measuring device is used for measuring the blood pressure of the patient; the display module is connected with the blood pressure measuring device; the display module is used for displaying the blood pressure value determined by the blood pressure measuring device.
The invention provides a blood pressure measuring device and a blood pressure meter, wherein the first end of a first sensor is respectively connected with the first end of a sound sensor, the first end of a gas-saving pipe and a first gas bag; the second end of the air-saving pipe is respectively connected with the first end of the air charging and discharging module, the first end of the second sensor and the second air bag; the processing module is respectively connected with the second end of the first sensor, the second end of the sound sensor, the second end of the inflation and deflation module and the second end of the second sensor; the processing module is used for controlling the inflation and deflation module to inflate and deflate the first air bag and the second air bag; the air-saving pipe is used for controlling the inflation and deflation speed of the first air bag; the first sensor is used for collecting a first pressure signal in the first air bag and sending the first pressure signal to the processing module; the second sensor is used for acquiring a second pressure signal in the second air bag and sending the second pressure signal to the processing module; the sound sensor is used for collecting pulse sound signals applied to the artery of the person to be tested in the pressure reduction process and sending the pulse sound signals to the processing module; the processing module is further configured to determine a blood pressure value based on the pulse tone signal, the first pressure signal, and the second pressure signal. In the blood pressure measuring device, the first sensor and the second sensor are respectively connected with the first air bag and the second air bag, and the air passage of the first sensor and the air passage of the second sensor can be kept relatively independent through the arrangement of the air-saving pipe, so that the air flow in the air passage of the first sensor is reduced, the air flow velocity is slowed down, the air flow noise is reduced, the acquisition precision of the sound sensor to pulse sound signals can be improved, and the measurement precision of the blood pressure value is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a system implementation provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electronic auscultation sphygmomanometer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a blood pressure measurement device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another blood pressure measurement device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another blood pressure measuring device according to an embodiment of the present invention;
Fig. 6 is a schematic structural diagram of a sphygmomanometer according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Currently, a sphygmomanometer is a main tool for measuring blood pressure, and some sphygmomanometers generally comprise a pressure sensor, for example, in the related art, a dual-mode electronic sphygmomanometer with a Korotkoff sound sensor and a pressure sensor is proposed, and a system implementation block diagram of the dual-mode electronic sphygmomanometer is shown in fig. 1; in the related art, the human blood pressure can be measured according to the combination of the auscultation method and the oscillometric method, and the structure schematic diagram of the electronic auscultation sphygmomanometer is shown in fig. 2.
The above-mentioned related art kohlrabi sound sensor is a Mic sound sensor, and it can be seen from the above-mentioned comparison document that most of blood pressure meters using Mic sound sensors employ a single air pump, one Mic sound sensor is communicated with an air channel of a pressure sensor, the Mic sound sensor can collect pulse sounds, the pressure sensor can test the pressure of a cuff air bag, and the two are relatively close in structure.
Based on the above, the embodiment of the invention provides a blood pressure measuring device and a blood pressure meter, and the technology can be applied to blood pressure measurement application.
For the convenience of understanding the present embodiment, first, a blood pressure measuring device disclosed in the present embodiment will be described in detail; as shown in fig. 3, the apparatus includes: a first airbag 30, a second airbag 31, a throttle tube 32, a first sensor 33, a second sensor 34, a sound sensor 37, an inflation/deflation module 35, and a processing module 36; the first end of the first sensor 33 is connected to the first end of the sound sensor 37, the first end of the damper pipe 32, and the first air bag 30, respectively; the second end of the throttle tube 32 is connected with the first end of the inflation and deflation module 35, the first end of the second sensor 34 and the second air bag 31; the processing module 36 is respectively connected with the second end of the first sensor 33, the second end of the sound sensor 37, the second end of the air charging and discharging module 35 and the second end of the second sensor 34; the processing module 36 is used for controlling the inflation and deflation module 35 to inflate and deflate the first air bag 30 and the second air bag 31; the air-saving pipe 32 is used for controlling the inflation and deflation speed of the first air bag 30; the first sensor 33 is configured to collect a first pressure signal in the first air bag 30, and send the first pressure signal to the processing module 36; the second sensor 34 is configured to collect a second pressure signal in the second air bag 31, and send the second pressure signal to the processing module 36; the sound sensor 37 is used for collecting pulse sound signals applied to the artery of the person to be tested in the process of pressure reduction, and sending the pulse sound signals to the processing module 36; the processing module 36 is further configured to determine a blood pressure value based on the pulse tone signal and the first and second pressure signals.
The first air bag 30 and the second air bag 31 may be set to a proper size according to actual requirements, and in general, the size of the first air bag 30 is smaller than that of the second air bag 31; the throttle pipe 32 is generally provided with a throttle hole with a preset aperture, and the aperture of the throttle hole can be set according to actual requirements; the sound sensor 37 may be a Mic sound sensor, or may be any other sensor that can collect pulse sound signals; the first sensor 33 and the second sensor 34 may be pressure sensors or the like capable of acquiring pressure signals; the inflation and deflation module 35 generally includes associated inflation and deflation components, such as an air pump, a deflation valve, and the like.
In actual implementation, the first sensor 33 may be connected to the first end of the sound sensor 37, the first end of the throttle pipe 32, and the first air bag 30 through four-way connectors, respectively; the second end of the air-saving pipe 32 is respectively connected with the first end of the air charging and discharging module 35, the first end of the second sensor 34 and the second air bag 31 through four-way connectors; by arranging the air-saving pipe 32, the first air path corresponding to the first sensor 33 and the second air path corresponding to the second sensor 34 can be kept relatively independent, and when the sound sensor 37 acquires a pulse sound signal applied to the artery of a person to be tested in the pressure reduction process, the air flows of the second air bag 31 and the air outlet pipe are far away from the sound sensor 37, so that the sound sensor 37 is less influenced by air flow noise.
In this embodiment, the processing module 36 is further connected to the second end of the first sensor 33, the second end of the sound sensor 37, the second end of the air inflation/deflation module 35, and the second end of the second sensor 34, where the processing module 36 can control the air inflation/deflation module 35 to inflate and deflate the first air bag 30 and the second air bag 31, and the air inflation/deflation speed of the first air bag 30 can be controlled by the air-saving hole provided on the air-saving pipe 32, so as to reduce the air flow in the first air path corresponding to the first sensor 33, and slow down the air flow. When the processing module 36 starts to deflate the second air bag 31 by controlling the inflation and deflation module 35, the pressure signal of the second air bag 31 in the deflation stage can be acquired by the second sensor 34 and then sent to the processing module 36, meanwhile, the first air bag 30 connected by the air saving pipe 32 also starts to deflate, the pressure signal of the first air bag 30 in the deflation stage can be acquired by the first sensor 33 and then sent to the processing module 36, and the sound sensor 37 connected with the first air bag 30 can acquire pulse sound signals applied to the artery of the person to be tested in the pressure reduction process and then send to the processing module 36; the processing module 36 may integrate the pressure signal and the pulse tone signal acquired by the three sensors, respectively, to determine a final blood pressure value.
The blood pressure measuring device is characterized in that a first end of a first sensor is respectively connected with a first end of a sound sensor 37, a first end of a gas-saving pipe and a first gas bag; the second end of the air-saving pipe is respectively connected with the first end of the air charging and discharging module, the first end of the second sensor and the second air bag; the processing module is respectively connected with the second end of the first sensor, the second end of the sound sensor 37, the second end of the inflation and deflation module and the second end of the second sensor; the processing module is used for controlling the inflation and deflation module to inflate and deflate the first air bag and the second air bag; the air-saving pipe is used for controlling the inflation and deflation speed of the first air bag; the first sensor is used for collecting a first pressure signal in the first air bag and sending the first pressure signal to the processing module; the second sensor is used for acquiring a second pressure signal in the second air bag and sending the second pressure signal to the processing module; the sound sensor 37 is used for collecting pulse sound signals applied to the artery of the person to be tested in the process of pressure reduction and sending the pulse sound signals to the processing module; the processing module is further configured to determine a blood pressure value based on the pulse tone signal, the first pressure signal, and the second and pressure signals. In the blood pressure measuring device, the first sensor and the second sensor are respectively connected with the first air bag and the second air bag, and the air passage of the first sensor and the air passage of the second sensor can be kept relatively independent through the arrangement of the air-saving pipe, so that the air flow in the air passage of the first sensor is reduced, the air flow velocity is slowed down, the air flow noise is reduced, the acquisition precision of the sound sensor to pulse sound signals can be improved, and the measurement precision of the blood pressure value is further improved.
Further, the first end of the first sensor 33, the first end of the sound sensor 37, the first end of the throttle pipe 32 and the first air bag 30 are connected through a first four-way joint; the second end of the gas-saving pipe 32, the first end of the gas charging and discharging module 35, the first end of the second sensor 34 and the second air bag 31 are connected through a second four-way joint.
Further, the ratio of the width of the first airbag 30 to the width of the second airbag 31 ranges from: 1:2.2-1:3.5 and similar proportions.
In practical implementation, the second sensor 34 connected to the second air bag 31 may collect a pressure signal in the second air bag 31, and calculate a corresponding blood pressure value by using an oscillometric method based on the pressure signal, so that in order to ensure accuracy of measurement of the blood pressure value, an optimal design needs to be performed on a relative width of the first air bag 30 and the second air bag 31, and through test, the width of the first air bag 30 needs to be smaller than that of the second air bag 31, and a ratio of the width of the first air bag 30 to the width of the second air bag 31 may be set between 1:2.2 to 1:3.5, specifically may be set according to actual requirements. Of course, the ratio of the widths of the first air bag 30 and the second air bag 31 may be other ratios outside the range of the ratio, and the influence of different ratios on the data acquisition accuracy needs to be comprehensively considered.
Further, the ratio of the width of the first bladder 30 to the width of the second bladder 31 includes 1:3 and 2:7 and similar ratios.
As a preferable aspect, the ratio of the widths of the first airbag 30 and the second airbag 31 may be set to 1:3, that is, the width of the first airbag 30 is 1/4 of the total width of the airbag, the width of the second airbag 31 is 3/4 of the total width of the airbag, the ratio of the widths of the first airbag 30 and the second airbag 31 may be set to 2:7, etc., the lengths of the first balloon 30 and the second balloon 31 are generally designed to be the same or similar length values. Such a specification design provides a better wearing comfort experience when worn, based on subject feedback.
Further, the total width range of the width of the first airbag 30 and the width of the second airbag 31 includes: 11.5cm-14cm and similar ranges.
In order to ensure the accuracy of the blood pressure value measured by the second air bag 31, the actual widths of the first air bag 30 and the second air bag 31 should be set within a reasonable range, and experiments prove that the total width of the first air bag 30 and the second air bag 31 can be set between 11.5cm and 14cm, and the width of the first air bag 30 and the width of the second air bag 31 can be obtained respectively by combining the width ratios of the first air bag 30 and the second air bag 31; of course, the width of the first air bag 30 and the second air bag 31 may be other widths outside the total width range, and the influence of different total widths on the data acquisition accuracy needs to be comprehensively considered.
Further, the diameter of the circular hole of the throttle pipe 32 is related to the volume ratio of the first air bag 30 to the second air bag 31; the smaller the volume ratio, the smaller the diameter of the circular hole of the throttle pipe 32.
The throttle hole 32 may be a circular hole, or may be in any other shape, for example, a square hole or an oval hole, and the throttle hole on the throttle pipe 32 is an example of a circular hole, and the diameter of the circular hole of the throttle pipe 32 may be understood as the diameter of the throttle hole on the throttle pipe 32, and in practical implementation, the specification design of the diameter of the circular hole of the throttle pipe 32 is mainly related to two factors, one factor is the volume of the first air bag 30, the other factor is the volume of the second air bag 31, and the size and the relative relationship of the two determine the size of the circular hole diameter. If the diameter of the circular hole of the air-saving pipe 32 is too large, the sound of the air flow in the first air bag 30 too fast can influence the quality of the sound signal collected by the first sensor 33; if the circular hole diameter of the air-saving pipe 32 is too small, a large deviation of the air pressure in the first air bag 30 from the air pressure in the second air bag 31 is caused.
Further, the range of circular hole diameters of the damper 32 includes: 0.05mm-0.15mm and similar ranges.
Further, the circular hole diameter of the throttle pipe 32 includes: 0.1mm and similar ranges.
Through experimental tests, according to the volume ratio of the first air bag 30 to the second air bag 31, the diameter range of the circular hole of the air throttle pipe 32 can be set between 0.05mm and 0.15mm, and the air throttle pipe can be specifically set according to actual requirements. In combination with the above-described total width range and preferable width ratio of the first balloon 30 and the second balloon 31, the volume ratio can be confirmed, and as a preferable aspect, the circular hole diameter of the air-saving pipe 32 may be set to 0.1mm. The range of the diameter of the circular hole of the throttle pipe 32 may be any other diameter than the range of the diameter of the circular hole, and the preferred diameter of the circular hole may be any other value, and the influence of the diameter of the circular hole on the data acquisition accuracy needs to be comprehensively considered.
Further, the device also comprises a cuff; the cuff includes a first balloon 30 and a second balloon 31.
In practical implementation, the blood pressure measuring device generally includes a cuff, and the blood pressure tester generally needs to wear the cuff to perform the blood pressure measurement, and the first and second air bags 30 and 31 are generally disposed in the cuff.
Further, the device also comprises a cylinder; the second end of the air-saving pipe 32 is connected with the first end of the air charging and discharging module 35 through an air cylinder; the air cylinder is used for buffering the air flow when the air charging and discharging module 35 charges and discharges the first air bag 30 and the second air bag 31.
In actual implementation, the second end of the throttle pipe 32 may be connected to one end of the air cylinder through a four-way joint, and the other end of the air cylinder is connected to the first end of the air charging and discharging module 35; because the four-way joint is also respectively connected with the first end of the second sensor 34 and the second air bag 31, a certain amount of air can be stored through the air cylinder, the buffer effect is achieved on the airflow flow among the first air bag 30, the second air bag 31 and the inflation and deflation module 35, and the noise caused by the air with rapid convection is reduced.
Further, the inflation/deflation module 35 includes: an air pump, a quick air release valve and a uniform air release valve; the air outlet end of the air pump, the first end of the quick air release valve and the first end of the uniform air release valve are respectively connected with the air cylinder; the control end of the air pump, the second end of the quick deflation valve and the second end of the uniform deflation valve are respectively connected with the processing module 36; the air pump is used for receiving the inflation signals output by the processing module 36 and inflating the first air bag 30 and the second air bag 31 based on the inflation signals; the constant-speed air release valve is used for receiving a constant-speed air release signal output by the processing module 36, and based on the constant-speed air release signal, the first air bag 30 is released at a first preset speed, and the second air bag 31 is released at a second preset speed; the quick release valve is configured to receive the quick release signal output by the processing module 36, and based on the quick release signal, deflate the first air bag 30 at a third preset speed, and deflate the second air bag 31 at a fourth preset speed.
Further, the apparatus further comprises: a gas rectification module; the air inlet end of the air pump is connected with the air rectifying module, and the air rectifying module is used for converting input air flow into gentle air flow and conveying the gentle air flow to the air inlet end of the air pump.
In actual implementation, an air rectifying module may be added at the air inlet end of the air pump to filter the air flow entering the air pump, so that the air flow can enter the air pump more gently, after receiving the inflation signal output by the processing module 36, the air pump is started, the second air bag 31 is inflated through the connecting pipe and the air cylinder, and meanwhile, the first air bag 30 is inflated through the air-saving pipe 32; when the first air bag 30 and the second air bag 31 are inflated to the preset air pressure, the processing module 36 will normally output a constant-speed deflation signal to the constant-speed deflation valve to open the constant-speed deflation valve, the constant-speed deflation valve starts to perform constant-speed deflation on the second air bag 31, meanwhile, the first air bag 30 connected through the air-saving pipe 32 starts to perform constant-speed deflation, the air quantity in the first air bag 30 will be smaller than the air quantity in the second air bag 31 because the size of the first air bag 30 is smaller than the size of the second air bag 31, and considering that the air quantity in the first air bag 30 needs to pass through the air-saving pipe 32 when the air is deflated, the deflation speeds of the first air bag 30 and the second air bag 31 will normally be different, i.e. the first air bag 30 will perform constant-speed deflation at the first preset speed, and the second air bag 31 will perform constant-speed deflation at the second preset speed, and the deflation speed of the second air bag 31 will be slightly faster than the deflation speed of the first air bag 30.
To further understand the above embodiments, a schematic structural diagram of another blood pressure measuring device shown in fig. 4 is provided below, where the device includes a first air bag, a second air bag, a gas saving pipe, a Mic sound sensor (corresponding to the above sound sensor), a first pressure sensor (corresponding to the above first sensor), a second pressure sensor (corresponding to the above second sensor), a cylinder, a rapid deflation valve, a uniform deflation valve, a gas pump, and a gas rectifier (corresponding to the above gas rectification module). The Mic sound sensor is connected with a first pressure sensor at one end and a first air bag at the other end through a four-way joint, and a third end is connected with a second air bag, a second pressure sensor and an air cylinder through an air saving pipe and another four-way joint, namely, the second pressure sensor is respectively connected with the second air bag, the air cylinder and the air saving pipe through another four-way joint, and the second pressure sensor is relatively isolated from an air path of the Mic sound sensor through the arrangement of the air saving pipe and the air cylinder; the air cylinder is arranged between the second air bag and the constant-speed air release valve, and between the quick air release valve and the air pump, a certain amount of air can be stored, the buffer effect is achieved on the air flow between the first air bag and the second air bag and the air pump and between the air pump and the air release valve, and the noise formed by the air with rapid convection is reduced.
The integral air circuit is arranged, so that air flow is reduced in the air circuit of the Mic sound sensor, the air flow speed is slowed down, and air flow noise is reduced. Through the design of the air-saving pipe connected with the first air bag, on one hand, the noise of the second air bag can be prevented from affecting the first air bag as much as possible, the two air bags are independent as much as possible, and meanwhile, the air pressure in the two air bags can be guaranteed to be equal. On the other hand, the deflation speed of the first air bag can be reduced, namely the air flow noise of the first air bag is reduced, so that the Mic sound sensor can collect pulse sound signals more easily.
In addition, the cylinder is additionally arranged in the blood pressure measuring device, and the cylinder with a proper volume can be selected according to actual demands, for example, the cylinder can be a 10ml cylinder and the like, gas can be stored through the cylinder so as to play a role in buffering the air flow of inflation and deflation, and particularly, the air flow of deflation can be buffered.
Referring to fig. 5, another schematic diagram of a blood pressure measuring device is shown; the processor (corresponding to the processing module) is respectively connected with the Mic sound sensor (corresponding to the sound sensor), the first pressure sensor (corresponding to the first sensor), the second pressure sensor (corresponding to the second sensor), the gas rectifier (corresponding to the gas rectifying module), the air pump, the quick air release valve and the uniform air release valve; in the following description of the method for measuring blood pressure, referring to fig. 4 and 5, firstly, the processor drives the air rectifier and the air pump to start to inflate the first air bag and the second air bag until the pressure sensor detects 170mmHg, then the processor drives the uniform-speed deflation valve to start to deflate the second air bag, and simultaneously the first air bag connected through the air-saving pipe starts to deflate, in the deflation stage, the Mic sound sensor connected with the first air bag can collect corresponding pulse sound signals, the first pressure sensor can collect pressure signals of the first air bag, the second pressure sensor connected with the second air bag can collect pressure signals of the second air bag, finally, the processor can calculate respective corresponding blood pressure values according to the oscillography and auscultation respectively based on the pressure signals and the pulse sound signals collected by the three sensors, and further obtains a final blood pressure measurement result, namely a final blood pressure value by using a weighted average method. As a preferred solution, the systolic pressure measured by the auscultation method and the diastolic pressure measured by the oscillometric method may be determined as final blood pressure values, wherein the systolic pressure measured by the auscultation method may be determined based on the measurement value of the Mic sound sensor in the first balloon, and the diastolic pressure measured by the oscillometric method may be determined based on the measurement value of the oscillometric method in the second balloon descent mode; as another preferable mode, the pressure value acquired by the pressure sensor corresponding to the occurrence time of the ringing sound and the vanishing sound of the auscultation method may be used as the final blood pressure value.
The blood pressure measuring device adopts a new air path design mode, the cuff of the blood pressure measuring device adopts a double-air-bag cuff, namely the cuff comprises a first air bag and a second air bag, each air bag is provided with a corresponding sensor, wherein the first air bag is specially connected with a Mic sound sensor to acquire pulse sound signals, the first air bag is connected with a first pressure sensor to acquire gas pressure change in the first air bag, the second air bag is connected with a second pressure sensor to acquire gas pressure change in the second air bag, and then a processor can estimate a blood pressure value by using an oscillometric method, the blood pressure value generally comprises systolic pressure and diastolic pressure, and finally, corresponding algorithm calculation is carried out based on data acquired by the three sensors, so that more accurate blood pressure values, in particular systolic pressure, are obtained.
The embodiment of the invention also provides a sphygmomanometer, referring to the schematic structural diagram of the sphygmomanometer shown in fig. 6, the sphygmomanometer comprises a display module 61, and a blood pressure measuring device 60 according to any one of the above-mentioned aspects; the display module 61 is connected with the blood pressure measuring device 60; the display module 61 is used for displaying the blood pressure value determined by the blood pressure measuring device 60.
In practical implementation, the display module 61 may be a liquid crystal display, etc., and after the final blood pressure value is determined by the blood pressure measuring device 60, the blood pressure value may be displayed by the connected display module 61, so that the test personnel can check the blood pressure measurement result in time.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. A blood pressure measurement device, the device comprising: the device comprises a first air bag, a second air bag, an air saving pipe, a first sensor, a second sensor, a sound sensor, an inflation and deflation module and a processing module;
The first end of the first sensor is respectively connected with the first end of the sound sensor, the first end of the throttle pipe and the first air bag; the second end of the air-saving pipe is connected with the first end of the inflation and deflation module, the first end of the second sensor and the second air bag; the processing module is respectively connected with the second end of the first sensor, the second end of the sound sensor, the second end of the inflation and deflation module and the second end of the second sensor;
The processing module is used for controlling the inflation and deflation module to inflate and deflate the first air bag and the second air bag; the throttle pipe is used for controlling the inflation and deflation speeds of the first air bag; the first sensor is used for collecting a first pressure signal in the first air bag and sending the first pressure signal to the processing module; the second sensor is used for acquiring a second pressure signal in the second air bag and sending the second pressure signal to the processing module; the sound sensor is used for collecting pulse sound signals applied to the artery of the person to be tested in the pressure reduction process and sending the pulse sound signals to the processing module; the processing module is further configured to determine a blood pressure value based on the pulse tone signal, the first pressure signal, and the second pressure signal;
The air-saving pipe is provided with an air-saving hole with a preset aperture; the air-saving holes are round holes, square holes or oval holes;
The diameter of the circular hole of the throttle pipe is related to the volume ratio of the first air bag to the second air bag; the smaller the volume ratio is, the smaller the diameter of the circular hole of the air-saving pipe is;
the ratio of the width of the first bladder to the width of the second bladder comprises 1:3 and 2:7;
the total width range of the width of the first air bag and the width of the second air bag comprises: 11.5cm-14cm.
2. The apparatus of claim 1, wherein the first end of the first sensor, the first end of the acoustic sensor, the first end of the damper pipe, and the first air bladder are connected by a first four-way joint;
The second end of the air-saving pipe, the first end of the air charging and discharging module, the first end of the second sensor and the second air bag are connected through a second four-way joint.
3. The device of claim 1, wherein the circular orifice diameter of the gas-saving tube comprises: 0.1mm.
4. The device of claim 1, further comprising a cuff; the cuff includes the first balloon and the second balloon therein.
5. The apparatus of claim 1, further comprising a cylinder;
The second end of the air-saving pipe is connected with the first end of the air charging and discharging module through the air cylinder;
the cylinder is used for buffering air flow when the inflation and deflation module inflates and deflates the first air bag and the second air bag.
6. The apparatus of claim 5, wherein the inflation and deflation module comprises: an air pump, a quick air release valve and a uniform air release valve;
The air outlet end of the air pump, the first end of the quick air release valve and the first end of the uniform air release valve are respectively connected with the air cylinder; the control end of the air pump, the second end of the quick air release valve and the second end of the uniform air release valve are respectively connected with the processing module;
The air pump is used for receiving the inflation signals output by the processing module and inflating the first air bag and the second air bag based on the inflation signals;
The constant-speed air release valve is used for receiving a constant-speed air release signal output by the processing module, and based on the constant-speed air release signal, the first air bag is released according to a first preset speed, and the second air bag is released according to a second preset speed;
The rapid deflation valve is used for receiving a rapid deflation signal output by the processing module, based on the rapid deflation signal, the first air bag is deflated according to a third preset speed, and the second air bag is deflated according to a fourth preset speed.
7. The apparatus of claim 6, wherein the apparatus further comprises: a gas rectification module;
the air inlet end of the air pump is connected with the air rectifying module,
The gas rectifying module is used for converting input air flow into gentle air flow and conveying the gentle air flow to the air inlet end of the air pump.
8. A blood pressure meter comprising a display module and the blood pressure measuring device of any one of claims 1-7;
the display module is connected with the blood pressure measuring device;
the display module is used for displaying the blood pressure value determined by the blood pressure measuring device.
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