CN112057064A - Detection mode of limb occlusion pressure and application method thereof - Google Patents
Detection mode of limb occlusion pressure and application method thereof Download PDFInfo
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- CN112057064A CN112057064A CN202010916952.3A CN202010916952A CN112057064A CN 112057064 A CN112057064 A CN 112057064A CN 202010916952 A CN202010916952 A CN 202010916952A CN 112057064 A CN112057064 A CN 112057064A
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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
Abstract
The invention discloses a detection method of limb occlusion pressure, which comprises the steps of sleeving a hemostasis cuff on a limb, increasing the pressure of the hemostasis cuff to a preset value set manually by using an electric air pump, gradually deflating at the speed of 2-4 mmHg, and sending the amplitude of a pulse wave and the static pressure of the hemostasis cuff detected each time to a CPU for processing. The device firstly pressurizes the inside of the tourniquet to block the arterial blood flow of the aorta of four limbs, then slowly reduces the pressure, and in the process of reducing the pressure, small pressure pulses can be conducted along the whole high-pressure gas of the tourniquet.
Description
Technical Field
The invention relates to the technical field of detection of limb occlusive pressure, in particular to a detection mode of limb occlusive pressure and an application method thereof.
Background
The lateral pressure of blood in the blood vessel against the wall of the blood vessel is the blood pressure. Since blood vessels are divided into arterial, venous and capillary blood, there are also arterial, venous and capillary pressures; the blood pressure is commonly referred to as arterial blood pressure. The difference between the systolic pressure and the diastolic pressure is called pulse pressure, called pulse pressure for short. Blood pressure is the pressure acting on the wall of a blood vessel when blood flows in the blood vessel, and is the driving force for driving the blood to flow in the blood vessel.
The specific methods for determining systolic pressure and diastolic pressure by using the oscillometric method are many, and can be mainly classified into two types: waveform characterization methods and amplitude coefficient methods. The basic principle of the waveform characteristic method is that the inflection point of the pulse wave envelope curve is utilized to measure the blood pressure, the static pressure corresponding to the inflection point is the systolic pressure when the pressure rises, and the static pressure corresponding to the inflection point is the diastolic pressure when the pressure falls. This method has poor individual adaptability in measurement and unstable measurement accuracy, and thus further improvement processing is required.
Disclosure of Invention
The present invention is directed to a method for detecting a limb occlusion pressure and a method for using the same, which solve the above-mentioned problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a detection mode of limb occlusion pressure is characterized in that a hemostasis cuff is sleeved on a limb, the pressure of the hemostasis cuff is increased to a preset value set manually by an electric air pump, then the hemostasis cuff is deflated gradually at the speed of 2-4 mmHg, the amplitude of pulse waves and the static pressure of the hemostasis cuff are detected each time and sent to a CPU for processing, and the heart rate is calculated according to the frequency of pulses; when the point positions of systolic pressure, average pressure and diastolic pressure are detected, the air valve is opened to completely deflate the hemostatic cuff, a measurement process is completed, the measurement result is stored, and the whole measurement process is controlled by STM32F103ZET6 to complete various calculations.
Preferably, the systolic pressure and the diastolic pressure are identified by determining normalization coefficients of the systolic pressure and the diastolic pressure, As is set As a pulse wave amplitude corresponding to the systolic pressure, Am is a pulse wave amplitude corresponding to an average pressure, Ad is a pulse wave amplitude corresponding to the diastolic pressure, As/Am is a normalization value of the systolic pressure Pd, Ad/Am is a normalization value of the diastolic pressure Ps, Pc is the cuff pressure, and an abscissa represents a continuous decrease of the pressure in the cuff during deflation.
Preferably, As/Am ═ C1, Ad/Am ═ C2, correspond to the position of systolic and diastolic blood pressure, respectively; according to the measured pulse wave amplitude value and the corresponding static pressure, the systolic pressure Ps, the diastolic pressure Pd and the average pressure Pm can be obtained. The amplitude coefficient of the systolic pressure is 0.46-0.64, and the amplitude coefficient of the diastolic pressure is 0.43-0.73.
Preferably, the hemostatic cuff is communicated with the pressure sensor to acquire the pressure in the hemostatic cuff in real time, and the pressure detection processing system of the system converts the cuff pressure into digital data through analog-digital conversion and displays the digital data in the display system in real time and measures and controls the pressure in real time.
Preferably, the hemostasis cuff deflation comprises an electromagnetic valve and a speed regulating valve, and the speed regulating principle is that the opening amplitude of the speed regulating valve is controlled by a current control signal generated by the system to control the flow of gas so as to regulate the exhaust speed.
Preferably, the detection mode of the limb occlusion pressure further comprises a pressure compensation module, the system can monitor the cuff pressure in real time and feed the cuff pressure back to the display system in real time for display, when the cuff pressure is lower than a certain value of the set pressure of the system, the motor is automatically started, the pressurizing air pump inflates the cuff, and when the cuff pressure exceeds the certain value of the set pressure, the inflating is automatically stopped, and the system enters a real-time monitoring state.
An application method of a detection mode of limb occlusion pressure comprises the steps that pressure gas generated by an electric air pump inflates and pressurizes a working cuff, and the pressure generated by an inflatable belt presses a limb to block blood flow of the limb.
Compared with the prior art, the invention has the beneficial effects that:
the device firstly pressurizes the inside of the tourniquet to block the arterial blood flow of the aorta of four limbs, then slowly reduces the pressure, and in the process of reducing the pressure, small pressure pulses can be conducted along the whole high-pressure gas of the tourniquet; the locking pressure of the aorta is obtained from a certain point on this envelope; due to the hemodynamic effects of the heart beat, pressure fluctuations synchronized with the heart beat, i.e. pulse waves, will be superimposed on the cuff pressure. When the cuff pressure is much higher than the systolic pressure, the pulse wave disappears. As cuff pressure drops, a pulse begins to appear. When the cuff pressure drops from above to below the systolic pressure, the pulse wave increases abruptly. Reaching a maximum value by the mean pressure. And then decays as cuff pressure decreases. Oscillometric blood pressure measurement estimates blood pressure based on the relationship between pulse wave amplitude and cuff pressure. The average pressure corresponds to the maximum value of the pulse wave, and the systolic pressure and the diastolic pressure respectively correspond to the proportion of the maximum amplitude of the pulse wave to determine the trachea.
Drawings
Fig. 1 is a schematic diagram of the working principle of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the present invention, a method for detecting a pressure of a limb occlusion includes sleeving a hemostatic cuff on a limb, increasing the pressure of the hemostatic cuff to a preset value manually set by using an electric air pump A, B, gradually deflating at a speed of 2 to 4mmHg, sending the amplitude of a pulse wave and the static pressure of the hemostatic cuff detected each time to a CPU for processing, and calculating a heart rate according to the frequency of the pulse; when the point positions of systolic pressure, mean pressure and diastolic pressure are detected, the air valve is opened to enable the hemostatic cuff to be completely deflated, a measurement process is completed, the measurement result is stored, and the whole measurement process is controlled by STM32F103ZET6 and various calculations are completed.
The systolic pressure and the diastolic pressure of the embodiment are identified by determining the normalization coefficient of the systolic pressure and the diastolic pressure, As is set As the pulse wave amplitude corresponding to the systolic pressure, Am is the pulse wave amplitude corresponding to the average pressure, Ad is the pulse wave amplitude corresponding to the diastolic pressure, As/Am is the normalized value of the systolic pressure Pd, Ad/Am is the normalized value of the diastolic pressure Ps, Pc is the cuff pressure, and the abscissa represents the continuous reduction of the pressure in the cuff during deflation.
As/Am ═ C1 and Ad/Am ═ C2 in this example, and correspond to the positions of systolic and diastolic blood pressure, respectively; according to the measured pulse wave amplitude value and the corresponding static pressure, the systolic pressure Ps, the diastolic pressure Pd and the average pressure Pm can be obtained. The amplitude coefficient of the systolic pressure is 0.46-0.64, and the amplitude coefficient of the diastolic pressure is 0.43-0.73.
The hemostasis cuff of the embodiment is communicated with the pressure sensor, the pressure inside the hemostasis cuff is collected in real time, the pressure detection processing system of the system converts the cuff pressure into digital data through analog-digital conversion and then displays the digital data in the display system in real time, and the pressure is measured and controlled in real time.
The hemostasis cuff deflation of the embodiment is composed of an electromagnetic valve A, B and a speed regulating valve A, B, and the speed regulating principle is that the opening amplitude of the speed regulating valve is controlled by a current control signal generated by the system to control the flow of gas and further regulate the exhaust speed.
The detection mode of the limb occlusive pressure of the embodiment further comprises a pressure compensation module, the pressure compensation module can monitor the cuff pressure in real time in a system and feed the cuff pressure back to the display system in real time for display, when the cuff pressure is lower than a certain value of the set pressure of the system, the motor is automatically started, the pressurizing air pump inflates the cuff, and when the cuff pressure exceeds the certain value of the set pressure, the inflation is automatically stopped, and the limb occlusive pressure enters a real-time monitoring state.
An application method of a detection mode of limb occlusion pressure comprises the steps that pressure gas generated by an electric air pump inflates and pressurizes a working cuff, and the pressure generated by an inflatable belt presses a limb to block blood flow of the limb.
The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description of the embodiments is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A detection mode of limb occlusive pressure is characterized in that a hemostatic cuff is sleeved on a limb, the pressure of the hemostatic cuff is increased to a preset value set manually by an electric air pump, then the hemostatic cuff is deflated gradually at the speed of 2-4 mmHg, the amplitude of a pulse wave and the static pressure of the hemostatic cuff are detected each time and sent to a CPU for processing, and the heart rate is calculated according to the frequency of the pulse; when the point positions of systolic pressure, mean pressure and diastolic pressure are detected, the air valve is opened to enable the hemostatic cuff to be completely deflated, a measurement process is completed, the measurement result is stored, and the whole measurement process is controlled by STM32F103ZET6 and various calculations are completed.
2. The method of claim 1, wherein the systolic pressure and the diastolic pressure are identified by determining a normalized coefficient of the systolic pressure and the diastolic pressure, As is a pulse wave amplitude corresponding to the systolic pressure, Am is a pulse wave amplitude corresponding to an average pressure, Ad is a pulse wave amplitude corresponding to the diastolic pressure, As/Am is a normalized value of a systolic pressure Pd, Ad/Am is a normalized value of a diastolic pressure Ps, Pc is a cuff pressure, and an abscissa represents a continuous decrease of the pressure in the cuff during deflation.
3. The method of claim 2, wherein As/Am ═ C1 and Ad/Am ═ C2 correspond to the systolic and diastolic blood pressure positions, respectively; according to the measured pulse wave amplitude value and the corresponding static pressure, the systolic pressure Ps, the diastolic pressure Pd and the average pressure Pm can be obtained. The amplitude coefficient of the systolic pressure is 0.46-0.64, and the amplitude coefficient of the diastolic pressure is 0.43-0.73.
4. The method for detecting the pressure of the occluded limb according to claim 1, wherein the hemostatic cuff is in communication with the pressure sensor to collect the pressure inside the hemostatic cuff in real time, and the pressure detection processing system of the system converts the cuff pressure into digital data through analog-digital conversion and displays the digital data on the display system in real time, and measures and controls the pressure in real time.
5. The method for detecting the pressure of the occluded limb according to claim 1, wherein the deflation of the hemostatic cuff is composed of an electromagnetic valve and a speed regulating valve, and the speed regulating principle is that the magnitude of the opening amplitude of the speed regulating valve is controlled by a current control signal generated by the system to control the flow of the gas and further regulate the exhaust speed.
6. The method for detecting the occlusive pressure of the limbs as claimed in claim 1, further comprising a pressure compensation module, wherein the cuff pressure is monitored in real time and fed back to the display system for displaying, when the cuff pressure is lower than a certain value of the set pressure of the system, the motor is automatically started, the pressurizing air pump inflates the cuff, and when the cuff pressure exceeds the certain value of the set pressure, the inflating is automatically stopped to enter a real-time monitoring state.
7. A method for detecting the occlusive pressure of the limbs according to claims 1-6, wherein the pressure gas generated by the electric air pump inflates and pressurizes the working cuff, and the pressure generated by the inflatable belt presses the limbs to block the blood flow of the limbs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010916952.3A CN112057064A (en) | 2020-09-03 | 2020-09-03 | Detection mode of limb occlusion pressure and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010916952.3A CN112057064A (en) | 2020-09-03 | 2020-09-03 | Detection mode of limb occlusion pressure and application method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1394546A (en) * | 2002-08-08 | 2003-02-05 | 天津市先石光学技术有限公司 | Blood pressure measuring device and method |
| CN1923133A (en) * | 2005-08-31 | 2007-03-07 | 深圳迈瑞生物医疗电子股份有限公司 | Method and device for calculating blood pressure by using signal transformation |
| CN101077299A (en) * | 2006-05-25 | 2007-11-28 | 王超文 | Electronic sphygmomanometer |
| CN104287805A (en) * | 2014-10-22 | 2015-01-21 | 南通航运职业技术学院 | Automatic artery compression haemostat and hemostasis method |
| US9039730B1 (en) * | 2014-07-10 | 2015-05-26 | Western Clinical Engineering, Ltd. | Personalized tourniquet system having dual-purpose cuff |
-
2020
- 2020-09-03 CN CN202010916952.3A patent/CN112057064A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1394546A (en) * | 2002-08-08 | 2003-02-05 | 天津市先石光学技术有限公司 | Blood pressure measuring device and method |
| CN1923133A (en) * | 2005-08-31 | 2007-03-07 | 深圳迈瑞生物医疗电子股份有限公司 | Method and device for calculating blood pressure by using signal transformation |
| CN101077299A (en) * | 2006-05-25 | 2007-11-28 | 王超文 | Electronic sphygmomanometer |
| US9039730B1 (en) * | 2014-07-10 | 2015-05-26 | Western Clinical Engineering, Ltd. | Personalized tourniquet system having dual-purpose cuff |
| CN104287805A (en) * | 2014-10-22 | 2015-01-21 | 南通航运职业技术学院 | Automatic artery compression haemostat and hemostasis method |
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