WO2009033310A1 - No-mercury medical sphygmomanometer - Google Patents

Abstract

A no-mercury medical sphygmomanometer includes a cuff (6), an air feeding and deflating equipment (4), a pressure sensor (8), an equipment (5) for hearing pulse sound, an input unit (10), a display unit and a singlechip-control unit (1). The display unit includes a simulative mercury column display (2) and a blood pressure display (3). The sampled blood pressure amplitude data are processed and transferred, and then displayed on the simulative mercury column display (2) and the blood pressure display (3) by the singlechip-control unit (1). The singlechip-control unit (1) also includes: a judging module for producing the start-jumping point and the resuming point of each pulsating period according to the sampled blood pressure amplitude data and the judging conditions; a data amplify module for amplifying the blood pressure amplitude data sampled in each pulsating period, so as to increase the sensory display amplitude of the blood pressure amplitude data in each pulsating period which are outputted to the simulative mercury column display (2) and the blood pressure display (3).

Description

 Medical mercury-free sphygmomanometer

 The present invention relates to the display of measured values of a sphygmomanometer, particularly a medical mercury-free sphygmomanometer.

Background technique

 With the development of society and the improvement of people's living standards, people need to understand the physical situation more and more; at the same time, due to the development of industrial society, the pollution caused by people's living environment also makes people also I hope that there is a tool that allows him to have a general understanding of his physical condition. According to scientific research, the level of blood pressure is a manifestation of his physical condition. Therefore, people pay more attention to various indexes of blood pressure in daily life, and from the blood pressure measuring instruments provided by the prior art, there are mainly mercury sphygmomanometers and medical mercury-free sphygmomanometers.

 The mercury sphygmomanometer has the advantages of stability, durability and low price. However, because the proportion of mercury is too large, and the mercury column sphygmomanometer uses the Coriolis method, because each doctor's hearing response speed is different, sometimes because the blood pressure reading is not recorded immediately when measuring, the larger error . Therefore, each doctor's measurement also produces errors, which are difficult to accurately and accurately reflect the instantaneous changes in blood pressure during each stroke. Moreover, mercury is a highly polluting and poisonous medium-sized metal that poses a certain risk to humans and the environment and is banned in many countries or regions.

 The other is the use of medical mercury-free sphygmomanometers, including semi-automatic medical mercury-free sphygmomanometers and fully automatic medical mercury-free sphygmomanometers, the difference between which is the way in which the gas is vented. The common principle is to use the pressure sensor to detect the gas pressure oscillation wave and pressure in the airbag, and generate different oscillation waves according to the change of the pressure in the airbag, and indirectly obtain the systolic blood pressure and the diastolic pressure of the blood pressure through the central processor, and pass through the display device. The blood pressure value and its pulse value are displayed.

 From the medical mercury-free sphygmomanometer provided by the prior art, it is a great improvement compared with the original mercury sphygmomanometer, which improves the speed and accuracy of the measurement to a certain extent, and avoids the The use of mercury improves the protection of the human body and the environment.

 However, the medical mercury-free sphygmomanometer provided by the prior art still has the following shortcomings.

1

Confirmation At:

 1. The existing medical mercury-free sphygmomanometer or the liquid crystal bar simulates the mercury column to read the blood pressure value, or directly converts the pressure value into a digital display through the liquid crystal block, because the simulated mercury column has a small jitter when the blood pressure is generated. The time is short, and it is difficult for the user to observe and capture this data;

 2. The prior art medical mercury-free sphygmomanometers have insufficient sampling intervals and sampling accuracy for the analog/digital conversion of blood pressure values when measuring blood pressure values.

 Therefore, how to develop a new type of medical mercury-free sphygmomanometer with high measurement accuracy, improved analog/digital conversion sampling interval and sampling accuracy for blood pressure, and at the same time is convenient to use has become a related art in the field. A problem in front of the personnel.

Summary of the invention

 The object of the present invention is to provide a measurement accuracy and use in view of the disadvantages of the cost, the accuracy of the reading and the accuracy of the output data of the medical mercury-free sphygmomanometer provided by the prior art. It is easy to observe and capture blood pressure data; at the same time, it has a new medical mercury-free sphygmomanometer with convenient advantages.

 In order to achieve the above object, the technical solution adopted by the present invention is as follows:

 A medical mercury-free sphygmomanometer, comprising a cuff, a charging and discharging device, a pressure sensor, a pulse sound listening device, an input unit, a display unit and a single-chip microcomputer control unit, wherein the 1⁄2 display unit comprises a simulated mercury column screen and a blood pressure display. The single-chip microcomputer control unit displays the collected blood pressure amplitude data on the simulated mercury column display screen and the blood pressure display screen after being processed, and the single-chip microcomputer control unit further includes a judgment module and a data amplification module, and determines The module generates a jump point and a recovery point pulse beat period for each pulse beat period according to the sampled blood pressure amplitude data and the judgment condition, and the data amplification module angle amplifies the blood pressure amplitude data collected in each pulse beat period to Increase the sensory display amplitude of the blood pressure amplitude data output to the simulated mercury column and blood pressure display during each pulse beat period.

 According to the medical mercury-free sphygmomanometer, the simulated mercury column display screen and the blood pressure display screen are liquid crystal display screens, and the sensory display amplitude amplified by the data amplification module is the amplitude of blood pressure collected during each pulse beat period. 2 times or more of the data.

According to the medical mercury-free sphygmomanometer, the judgment condition is: starting from the first blood pressure amplitude sampling data, and sequentially comparing the sampled data backwards, if one sampling data is larger than the previous sampling after consecutive N occurrences Data, it is considered that the time point corresponding to the first sampling data after the first occurrence is the starting point of the pulse hopping period, and the first one after the same is equal to the starting point value. The corresponding time point is a recovery point of the pulse beat period; wherein N is an integer greater than or equal to 2. According to the medical mercury-free sphygmomanometer, the value of N is 3.

 According to the medical mercury-free sphygmomanometer, the sampling frequency of the blood pressure value obtained by the single-chip microcomputer control unit is 200 to 420 Hz, the sampling precision is less than or equal to 0.1 mmHg, and the number of bits of the analog/digital conversion is 11 bits. or above.

 According to the medical mercury-free sphygmomanometer, the single-chip microcomputer control unit further includes a pulse sound processing module for determining a moment when the pulse sound completely disappears, and instructing the charging and discharging device to quickly and automatically start from a moment when the pulse sound completely disappears. Deflate or manually deflate quickly.

 According to the medical mercury-free sphygmomanometer, the pulse sound listening device is one of a stethoscope or a loudspeaker.

The present invention also provides a display method based on the medical mercury-free sphygmomanometer described above, comprising the following steps _: Step 1: Inflating the cuff through the charging and discharging device;

 Step 2: 'The pressure sensor detects the blood pressure pressure value obtained in the cuff and transmits it to the MCU control unit;

 Step 3: The MCU control unit compares the received pressure value with a preset pressure value pre-stored in the control unit of the single chip microcomputer, and stops the inflation when the pressure value is at the preset pressure value; Step 4: The MCU control unit issues an instruction , the charge and discharge device starts to deflate slowly;

 Step 5: The pressure sensor collects the blood pressure amplitude data and transmits it to the single-chip microcomputer control unit, and the single-chip microcomputer control unit generates a jump point and a recovery point of each pulse beat period according to the collected blood pressure amplitude data and the judgment condition;

 Step 6: Amplify the blood pressure amplitude data collected during each pulse beat period, and display the blood pressure amplitude output to the simulated mercury column and the blood pressure display.

 According to the display method of the medical mercury-free sphygmomanometer, after the step 6, the method further includes: Step 7: After the MCU control unit determines that the pulse sound completely disappears, instruct the charging and discharging device to automatically deflate or manually Quickly deflate.

According to the display method of the medical mercury-free sphygmomanometer, the judging condition is: starting from the first blood pressure amplitude sampling data, and sequentially comparing the sampled data backwards, if one sampling data occurs after N consecutive times If it is larger than the previous sampling data, it is considered that one sampling data after the first occurrence is larger than the starting point of the pulse jumping period corresponding to the previous sampling data, and the first one corresponding to the starting point value is equal to a recovery point of the pulse beat period; wherein N is an integer greater than or equal to 2. The sampling frequency of the blood pressure value obtained by the data acquisition module is 200 to 420 Hz, the sampling precision is less than or equal to 0.1 mmHg, and the number of bits of the analog/digital conversion is 11 or more.

 The invention has the beneficial effects of providing a measurement accuracy by making up for the disadvantages of high cost, accurate reading and unreliable data accuracy of the medical mercury-free sphygmomanometer provided by the prior art. A new medical mercury-free sphygmomanometer that is high in use and can improve the sampling interval and sampling accuracy of blood pressure, while at the same time being convenient to use.

DRAWINGS

 Figure 1 is a block diagram showing the structure of a medical mercury-free sphygmomanometer of the present invention;

 Figure 2 is a plan view of a display device of a prior art medical mercury-free sphygmomanometer;

 Figure 3 is a plan view showing a display device of the medical mercury-free blood pressure monitor of the present invention;

 Figure 4 is a time-change function diagram of blood pressure values;

 Figure 5 is a flow chart showing the main control routine of the medical mercury-free sphygmomanometer of the present invention;

 Figure 6 is a flow chart showing the slow deflation control program and display procedure of the medical mercury-free sphygmomanometer of the present invention. detailed description

 The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

 1 and FIG. 3, FIG. 1 is a structural block diagram of a medical mercury-free sphygmomanometer according to the present invention; and FIG. 3 is a plan view of a display device of the medical mercury-free sphygmomanometer of the present invention.

 The medical mercury-free sphygmomanometer shown in the figure includes a power source 7, a cuff 6, a charge and discharge device 4, a pressure sensor 8, a pulse sound listening device 5, an input unit 10, a display unit (including a simulated mercury column display 3 and blood pressure). Display 2) and the medical mercury-free sphygmomanometer composed of the MCU control unit 1. The display unit 2, 3 is an LED light display strip or a liquid crystal display strip, and the single-chip microcomputer control unit 1 processes the collected blood pressure amplitude data, and displays it on the simulated mercury column display screen 3 and the blood pressure display. On screen 2. The charging and discharging device 4 is one of a manual charging and discharging device and an automatic charging and discharging device, and the single chip control unit 1 controls the charging and discharging device 4 through a solenoid valve at a suitable flushing gas speed. Perform a flushing operation. The pulse sound listening device 5 is one of a stethoscope or a loudspeaker.

The MCU control unit 1 further includes a judging module and a data amplifying module. The judging module judges the starting point and the recovery point of each pulse bounce period according to the sampled blood pressure amplitude data and the judgment condition; the data amplifying module is used to amplify each Blood pressure amplitude data collected during a pulse beat period to increase output to the simulated mercury column and blood pressure display 'in the blood pressure amplitude data of each pulse beat period Sensory display amplitude. Preferably, the sampling frequency of the blood pressure value obtained by the single chip control unit is

200 to 420 Hz, the sampling accuracy is less than or equal to 0.1 mmHg column, and the number of bits of the analog/digital conversion is 11 bits or more.

 Please refer to Figure 4. Figure 4 is a graph showing the time variation of blood pressure values. The pressure curve 10 shown in the figure is expressed as a jitter generated by simulating the change of the mercury column with time, wherein the pressure curve A gradually decreases as the air pressure in the cuff 6 decreases, and when the gas pressure drops to be equal to the systolic pressure When the first pulsation sound is heard, the scale indicated by the mercury column is the systolic pressure, and then a series of pulse pulsation periods are generated. When the internal pressure of the airbag gradually decreases to the same as the diastolic pressure of the heart, the pulsating sound suddenly becomes weak or disappears. At this time, the scale indicated by the mercury column is diastolic pressure.

 The judging module included in the single chip control unit 1 determines the start point and the recovery point of each pulse bounce period based on the sampled blood pressure amplitude data and the judgment condition. Taking the period of generating the systolic pressure as an example, starting from the first blood pressure amplitude sampling data input to the single-chip microcomputer control unit, if one sampling data is larger than the previous sampling data after consecutive N occurrences, it is considered that the first occurrence occurs after the first one. The sampling data is larger than the starting point of the pulse beat period corresponding to the previous sampling data, and the first one corresponding to the starting point value is the recovery point of the pulse beat period; wherein N is greater than or equal to 2 An integer, for example, the value of N is 3.

 At the initial point 101 (ie, the jump point) of the systolic pressure, systolic pressure begins to occur, and as the pressure curve jumps up to the systolic pressure point 102, then begins to fall, followed by the first and the hop. The equal value corresponds to the recovery point 103 of the pulse beat period. In this embodiment, the data amplifying module included in the single chip control unit is configured to amplify the blood pressure amplitude data collected during each pulse bounce period to increase the output to the simulated mercury column and blood pressure. The sensory display amplitude of the blood pressure amplitude data during each pulse beat period. Moreover, the jitter amplitude of the blood pressure amplitude data displayed by the simulated mercury column display 2 is more than doubled during each pulse beat period.

 Referring to FIG. 2, FIG. 2 is a plan view of a display device of a prior art medical mercury-free sphygmomanometer; and FIG. 3 is a plan view of a display device of the medical mercury-free sphygmomanometer of the present invention. As shown, the blood pressure jitter range of the medical mercury-free sphygmomanometer of the present invention is at least doubled in comparison with the blood pressure jitter range 91 of the medical mercury-free sphygmomanometer provided by the prior art of Figure 1.

As the pressure in the cuff 6 drops, the pressure value rebounds continuously until the pulse sound disappears. Recording the diastolic blood pressure, you can end this measurement. .

 Preferably, when the MCU control unit determines that the pulse sound completely disappears, the charging and discharging device is instructed to quickly and automatically deflate or manually deflate.

 The display method of the medical mercury-free sphygmomanometer of the present invention will be described in detail below with reference to Figs. 5 and 6. Figure 5 is a flow chart showing the main control routine of the medical mercury-free sphygmomanometer of the present invention; and Figure 6 is a flow chart showing the slow deflation control program and display program of the medical mercury-free sphygmomanometer of the present invention.

 As shown in FIG. 5, the system is powered on, the main control program starts to run (step S01); the initialization is entered (step S02), and in step S02, the single-chip microcomputer control unit 1' receives the preset pressure value input by the input device 10, for example, 180 mmHg column. And storing the pressure value in the memory of the single-chip microcomputer control unit 1; after the initialization is completed, the single-chip microcomputer control unit i controls the charging and discharging device 4 to start inflating (step S03), and the inflation speed is 2 mmHg/s and 3 mmHg. Between the /S; the microcontroller control unit 1 compares the received pressure value with a preset pressure value pre-stored in the single-chip microcomputer control unit 1, and stops the inflation when the pressure value is at the preset pressure value; specifically, That is, whether the air pressure is greater than

180mmHg (step S04); if less than 180mmHg, then go to step S03, continue to inflate, if it is greater than 180mmHg, stop inflation (step 05); the microcontroller control unit 1 issues an instruction, the charging and deflation device starts slow deflation measurement (step S06) Then, step S07 is performed.

 In step S07, it is determined whether the air pressure is less than 40 mmHg, if the air pressure is not less than 40 mmHg, the process proceeds to step S06, and the measurement is continued; if the air pressure is less than 40 mmHg, the process proceeds to step S08 to quickly deflate; after the rapid deflation is completed, the next measurement command is awaited. (Step S09), that is, it is judged that it is necessary to perform the next measurement, if necessary, the process goes to step S03, and if it is not, the shutdown is completed (step S010).

 Fig. 6 is a flow chart showing the slow deflation control program and display program of the medical mercury-free sphygmomanometer of the present invention (step S06). In Fig. 6, the slow deflation control program is started from step S21; the pressure sensor 8 detects the blood pressure pressure value acquired in the cuff 6 and transmits it to the single chip microcomputer control unit 1 (step 22); The film control unit 1 samples the blood pressure pressure value to generate blood pressure amplitude data (data0, data data2, data3, data4, data5) (step S23); and then, according to the collected blood pressure amplitude data and the judgment condition, each pulse is generated. a jump point and a recovery point of the jitter period (step S24); amplifying blood pressure amplitude data collected during each pulse beat period (step S25), and displaying the blood pressure amplitude output to the simulated mercury column and blood pressure On the display screen (step S26).

Specifically, the determining condition is: starting from the first blood pressure amplitude sampling data, backwards Comparing the sampled data, if one consecutive N occurrences, one sample data is larger than the previous sample data, where N is an integer greater than or equal to 2, preferably, N is equal to 3. For example, if the blood pressure value dataO>datal is extracted but datal<data2<data3, it is considered that the time point corresponding to the previous sampling data after the first occurrence is the hopping point (datal) of the pulse hopping period, and thereafter The first time point corresponding to the value of the jump point is the recovery point of the pulse beat period (for example, data9), then, it can be considered that the first pulse beat period obtained is the systolic pressure pulse beat period, after m There is a series of pulse beat periods until the last pulse beat period, that is, the diastolic pressure pulse beat period is obtained; then, the blood pressure amplitude data collected during each pulse beat period is amplified, and the blood pressure amplitude output is displayed to the simulation Mercury column and blood pressure display (step S26).

 In summary, the medical mercury-free sphygmomanometer of the present invention can be captured when the sampling accuracy is 0.1 mmHg, and when it encounters a pulse rising period of about 0.5 mmHg, the value can be further amplified by more than one time. The display exaggerates the beat of the pulse, making it easier for the user to observe the beat. Therefore, the medical mercury-free sphygmomanometer of the present invention compensates for the disadvantages of the high cost, the accuracy of the reading, and the difficulty in ensuring the accuracy of the medical mercury-free sphygmomanometer provided by the prior art, and provides a A new medical mercury-free sphygmomanometer with high measurement accuracy, improved sampling interval for blood pressure and sampling accuracy, and at the same time, is easy to use.

Claims

Claim A medical mercury-free sphygmomanometer comprising a cuff, a charge and discharge device, a pressure sensor, a pulse sound listening device, an input unit, a display unit and a single-chip microcomputer control unit, wherein the display unit comprises a simulated mercury column display and a blood pressure display Screen, the single-chip microcomputer control unit displays the collected blood pressure amplitude data, after being processed and converted, and displayed on the simulated mercury column display screen and the blood pressure display screen;  The control unit further includes:  The judging module generates a jump point and a recovery point pulse bounce period for each pulse bounce period according to the sampled blood pressure amplitude data and the judgment condition;  The data amplifying module is configured to amplify the blood pressure amplitude data collected during each pulse beat period to increase the sensory display amplitude of the blood pressure amplitude data outputted to the simulated mercury column and the blood pressure display during each pulse beat period.  2. The medical mercury-free sphygmomanometer according to claim 1, wherein: the simulated mercury column display screen and the blood pressure display screen are liquid crystal display screens, and the sensory display amplitude amplified by the data amplification module is each pulse pulse. 2 times or more of the blood pressure amplitude data collected during the beating period.  3. The medical mercury-free sphygmomanometer according to claim 2, wherein: the determining condition is: starting from the first blood pressure amplitude sampling data, and sequentially comparing the sampled data backwards, if consecutive N times After the occurrence of one sample data is larger than the previous sample data, it is considered that the time point corresponding to the previous sample data after the first occurrence is the start point of the pulse beat period, and the first one and the start point thereafter The time point corresponding to the equal value is the recovery point of the pulse bounce period; wherein N is an integer greater than or equal to 2. '  4. The medical mercury-free sphygmomanometer according to claim 3, wherein: the value of N is 3.  The medical mercury-free sphygmomanometer according to any one of claims 1, 2 or 3, wherein: the sampling frequency of the blood pressure value obtained by the single-chip control unit is 200 to 420 Hz, and the sampling precision is less than or equal to 0.1 mmHg column. And the number of bits of the analog-to-digital conversion is 11 bits or more. 6. The medical mercury-free pressure according to claim 1, wherein: the single-chip microcomputer control unit further comprises a pulse sound processing module, configured to determine a moment when the pulse sound completely disappears, and instruct the charging and discharging device to be pulsed The time when the sound completely disappears is quickly and automatically deflated or manually deflated quickly. 7. A medical mercury-free sphygmomanometer according to claim 1, wherein: said pulse sound listening device is one of a stethoscope or a loudspeaker.  8. A method of displaying a medical mercury-free sphygmomanometer according to claim 1, characterized by - comprising the steps of:  Step 1: Inflate the cuff through the charging and discharging device;  Step 2: The pressure sensor detects the blood pressure pressure value acquired in the cuff and transmits it to the single-chip control unit;  Step 3: The MCU control unit compares the received pressure value with a preset pressure value pre-stored in the control unit of the single chip microcomputer, and stops the inflation when the pressure value is at the preset pressure value; Step 4: The MCU control unit issues an instruction The charging and discharging device starts to deflate slowly;  Step 5: The pressure sensor collects the blood pressure amplitude data and transmits it to the single-chip microcomputer control unit, and the single-chip microcomputer control unit generates a jump point and a recovery point of each pulse beat period according to the collected blood pressure amplitude data and the judgment condition;  Step 6: Amplify the blood pressure amplitude data collected during each pulse beat period, and display the blood pressure amplitude output to the simulated mercury column and the blood pressure display.  9. The method according to claim 8, wherein the step 6 further comprises:  Step 7: After the MCU control unit determines that the pulse sound completely disappears, the charging and discharging device is instructed to quickly and automatically deflate or manually deflate.  10. A method of displaying a medical mercury-free sphygmomanometer according to any of claims 8 or 9, wherein:  The judging condition is: starting from the first blood pressure amplitude sampling data, and sequentially comparing the sampled data backwards, if one sampling data is larger than the previous sampling data after consecutive N occurrences, it is considered that after the first occurrence A sampling data is larger than a starting point of the pulse hopping period corresponding to the previous sampling data, and the first one corresponding to the starting point value is a recovery point of the pulse hopping period; wherein, N is greater than or equal to An integer of 2;  The data acquisition module acquires a blood pressure pressure value with a sampling frequency of 200 to 420 Hz, a sampling accuracy of less than or equal to an O.lmmHg column, and a number of bits of the analog/digital conversion of 11 bits or more.