Blood oxygen saturation algorithm under ischemia preconditioning training

Abstract

The invention discloses a blood oxygen saturation algorithm under ischemic preconditioning training, which specifically comprises the following steps: S1, ischemic preconditioning training: pressurizing a left big arm and a right big arm through a cuff by using an ischemic preconditioning training instrument, pressurizing to 200mmHg, stopping pressurizing to 200mmHg and maintaining for 5 minutes, and relieving the pressure for 5 minutes, repeating for 5 times, and totally 45 minutes; the invention relates to the technical field of electrocardiogram monitoring. According to the blood oxygen saturation algorithm under ischemia pre-adaptation training, the algorithm is suitable for thin tissues such as lips, the change of the blood oxygen saturation, especially the change of the color of the lips in an oxygen deficit state, is more sensitive and remarkable, and in the process of self-adaptation ischemia training, the blood oxygen probe detects the blood oxygen saturation in blood, so that the blood oxygen saturation in the blood is not influenced. The control unit adjusts the pressure intensity of the inflatable air bag and the training duration according to the blood oxygen saturation degree, carries out real-time calculation according to data provided by the blood oxygen probe, controls the training pressure and the training duration, carries out targeted training on a trainee and strengthens the training effect.

Description

Technical Field

[0001] The invention relates to the technical field of electrocardiogram monitoring, and in particular to a blood oxygen saturation algorithm under ischemic preconditioning training. Background Art

[0002] Blood oxygen refers to the oxygen in the blood. It is an important physiological parameter of respiratory circulation, not an indicator of heart rate. The blood oxygen saturation of healthy people is generally above 94%, and the heart rate is between 60-100. Blood oxygen saturation is an indicator of human health. It is used to mark the ratio of oxygen and hemoglobin in arterial blood to total hemoglobin. If the human body's blood oxygen content is insufficient, it is easy to cause many complications. The most obvious point is dizziness and sleepiness, lack of energy in doing things, and irritability. If the blood oxygen content is insufficient for a long time, the cerebral cortex will be the first to suffer the most direct damage. If the brain is diseased, the harm to the human body is the most obvious, causing myocardial failure, poor blood circulation and other symptoms. Blood oxygen saturation is an important physiological parameter of human respiratory circulation, which can directly reflect the oxygenation of the lungs and the oxygen-carrying capacity of hemoglobin in the blood. Hypoxia will directly affect tissue aerobic metabolism, thereby causing organ dysfunction or even failure. Chronic obstructive pulmonary disease, some congenital heart diseases and other diseases all have hypoxia.

[0003] Currently, blood oxygen saturation is mainly monitored clinically through pulse oximeters and blood gas analysis, both of which require special testing instruments. Although the former is more portable, it is affected by factors such as skin pigmentation and bilirubin, and has a measurement error of 2-3%. The latter is the "gold standard" for blood oxygen saturation monitoring, but it requires invasive blood sampling and the use of a specific blood gas analyzer to analyze the data, which is more cumbersome to operate. Traditional functional indicator detection methods are mostly limited to destructive detection, or the detection resolution is not high, and cannot provide effective monitoring capabilities for blood oxygen indicators at specific locations. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a blood oxygen saturation algorithm under ischemic preconditioning training, which solves the problems of complicated operation and the traditional functional index detection methods being mostly limited to lossy detection or low detection resolution.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a blood oxygen saturation algorithm under ischemic preconditioning training, specifically comprising the following steps:

[0006] S1. Ischemic preconditioning training: Use an ischemic preconditioning training device to apply pressure to the left and right upper arms through a cuff to 200 mmHg, then block the pressure to 200 mmHg for 5 minutes, release the pressure for 5 minutes, repeat this 5 times for a total of 45 minutes;

[0007] S2. Measure blood oxygen saturation: Use photoplethysmography to measure:

[0008] (1) Measure heart rate, n heartbeat cycles as one time unit t, and measure the reference oxygen saturation SaO0;

[0009] (2) Block for one time unit, release the pressure within one heartbeat cycle, and immediately measure the oxygen saturation SaO1. Block for two time units to obtain SaO2. After k times, measure SaOK.

[0010] (3) With t as the independent variable and SaO as the dependent variable, the Gaussian formula is used for fitting. After obtaining the Gaussian parameters, the time is calculated based on the lower limit of the allowable oxygen saturation value. This time is the maximum time of a single block. The maximum time is m (0-1) times the maximum time as the safe training time.

[0011] Preferably, in S1, the ischemic preconditioning training instrument adopts an original pump pressure intelligent technology, which is in line with relevant practical verification. It can activate a large amount of protective factors such as limb adenosine, bradykinin and nitric oxide instantly through external intervention and regular short-term blocking of limb, upper or lower limb arterial and venous blood flow. After repeated short-term ischemia and reperfusion, it can achieve the effect of ischemic adaptation, which plays an important role in the protection of cardiovascular and cerebrovascular and other organs, and is an effective method to protect cardiovascular and cerebrovascular organs from the source.

[0012] Preferably, in S1, before selecting the blood pressure measurement mode for blood pressure measurement, the main side arm strap is tied to the upper arm of the tester, and when the ischemic pre-adaptation training device is operated, the control unit controls the air pump to inflate the inflatable air bag, and the air pressure monitoring unit detects the pressure P of the inflatable air bag and transmits the detection result to the control unit. The control unit is provided with a pressure evaluation value Pz, and the control unit compares the detected pressure P with the pressure evaluation value Pz; when P≥Pz, the control unit controls the air pump to stop inflating the inflatable air bag, and controls the inflatable air bag to deflate, and the blood pressure detection module performs blood pressure detection; when P<Pz, the control unit controls the air pump to continue to inflate the inflatable air bag until P≥Pz; when the blood pressure detection is completed, the display screen or the display unit displays the detection result, and the storage unit stores the detection result.

[0013] Preferably, in S2, the photoplethysmography method uses a photoelectric sensor to collect the photoplethysmography signal at the pulse, and the photoelectric sensor is composed of two light emitting diodes and a photoelectric receiving tube. There are two ways to place the photoelectric sensor at the measured arm position: Method 1, arranged according to the reflection principle: using a jaw pad to place two light emitting diodes and a photoelectric receiving tube on the same side of the arm; Method 2, arranged according to the transmission principle: using a jaw pad to place two light emitting diodes on one side of the arm, and the photoelectric receiving tube on the other side of the arm, and the positions of the two light emitting diodes and the photoelectric receiving tube are opposite.

[0014] Preferably, in S2(3), the frequency response curve of the transducer is modeled as a Gaussian function, and h(t) and Specifically, h(t) represents the impulse response of the receiver, as follows:

[0015]

[0016] Where ω0 is the center frequency of the transducer and σ is the bandwidth of the receiver.

[0017] Beneficial Effects

[0018] The present invention provides a blood oxygen saturation algorithm under ischemic pre-adaptation training. Compared with the prior art, it has the following beneficial effects: the blood oxygen saturation algorithm under ischemic pre-adaptation training specifically includes the following steps: S1, ischemic pre-adaptation training: use an ischemic pre-adaptation training device to pressurize the left and right upper arms through a cuff, pressurize to 200mmHg, pressurize to 200mmHg for 5 minutes, release the pressure for 5 minutes, repeat this 5 times, a total of 45 minutes; S2, measure blood oxygen saturation: measure with photoelectric volumetric pulse wave; the photoelectric sensor is composed of two light-emitting diodes and a photoelectric receiving chip, which has the advantages of small size and easy to carry, and the photoelectric sensor can emit red light, infrared light and Green light can be applied to translucent tissues such as lips. Compared with the existing technology, the light emitted by the light emitting diode is not very transmittant and is suitable for thinner tissues such as lips. When the blood oxygen saturation changes, especially in the state of hypoxia, the color change of the lips is more sensitive and significant. During the adaptive ischemia training, the blood oxygen probe detects the blood oxygen saturation in the blood, and the control unit adjusts the inflated air bag pressure and training duration according to the blood oxygen saturation. Real-time calculation is performed based on the data provided by the blood oxygen probe to control the training pressure and duration, conduct targeted training for the trainees, and enhance the training effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a flow chart of the steps of the present invention;

[0020] Figure 2This is a diagram of the operating steps of the ischemic preconditioning training device of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 The present invention provides a technical solution: a blood oxygen saturation algorithm under ischemic preconditioning training, which specifically includes the following steps:

[0023] S1. Ischemic preconditioning training: Use an ischemic preconditioning training device to apply pressure to the left and right upper arms through a cuff to 200 mmHg, then block the pressure to 200 mmHg for 5 minutes, release the pressure for 5 minutes, repeat this 5 times for a total of 45 minutes;

[0024] S2. Measure blood oxygen saturation: Use photoplethysmography to measure:

[0025] (1) Measure heart rate, n heartbeat cycles as one time unit t, and measure the reference oxygen saturation SaO0;

[0026] (2) Block for one time unit, release the pressure within one heartbeat cycle, and immediately measure the oxygen saturation SaO1. Block for two time units to obtain SaO2. After k times, measure SaOK.

[0027] (3) With t as the independent variable and SaO as the dependent variable, the Gaussian formula is used for fitting. After obtaining the Gaussian parameters, the time is calculated based on the lower limit of the allowable oxygen saturation value. This time is the maximum time of a single block. The maximum time is m (0-1) times the maximum time as the safe training time.

[0028] In the present invention, in S1, the ischemic preconditioning training instrument adopts an original pump pressure intelligent technology, which conforms to relevant practical verification. It can activate a large amount of protective factors such as limb adenosine, bradykinin and nitric oxide instantly through external intervention and regular short-term blocking of limb, upper limb or lower limb arterial and venous blood flow. After repeated short-term ischemia and reperfusion, the effect of ischemic adaptation can be achieved. It plays an important role in the protection of cardiovascular and cerebrovascular and other organs, and is an effective method to protect cardiovascular and cerebrovascular organs from the source.

[0029] In the present invention, in S1, before selecting the blood pressure measurement mode for blood pressure measurement, the main side arm strap is tied to the upper arm of the tester, and when the ischemic pre-adaptation training device is operated, the control unit controls the air pump to inflate the inflatable air bag, and the air pressure monitoring unit detects the pressure P of the inflatable air bag and transmits the detection result to the control unit. The control unit is provided with a pressure evaluation value Pz, and the control unit compares the detected pressure P with the pressure evaluation value Pz; when P≥Pz, the control unit controls the air pump to stop inflating the inflatable air bag, and controls the inflatable air bag to deflate, and the blood pressure detection module performs blood pressure detection; when P<Pz, the control unit controls the air pump to continue to inflate the inflatable air bag until P≥Pz; when the blood pressure detection is completed, the display screen or the display unit displays the detection result, and the storage unit stores the detection result.

[0030] In the present invention, in S2, the photoelectric volumetric pulse wave method uses a photoelectric sensor to collect the photoelectric volumetric pulse wave signal at the pulse. The photoelectric sensor is composed of two light-emitting diodes and a photoelectric receiving tube. There are two ways to place the photoelectric sensor at the position of the measured arm: the first way is to arrange it according to the reflection principle: use a jaw pad to place two light-emitting diodes and a photoelectric receiving tube on the same side of the arm; the second way is to arrange it according to the transmission principle: use a jaw pad to place two light-emitting diodes on one side of the arm, and place the photoelectric receiving tube on the other side of the arm, and the positions of the two light-emitting diodes and the photoelectric receiving tube are opposite.

[0031] In the present invention, in S2(3), the frequency response curve of the transducer is modeled as a Gaussian function, and h(t) and Specifically, h(t) represents the impulse response of the receiver, as follows:

[0032]

[0033] Where ω0 is the center frequency of the transducer and σ is the bandwidth of the receiver.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blood oxygen saturation algorithm under ischemic preconditioning training, characterized by: The specific steps include: S1. Ischemic preconditioning training: Use an ischemic preconditioning training device to apply pressure to the left and right upper arms through a cuff to 200 mmHg, then block the pressure to 200 mmHg for 5 minutes, release the pressure for 5 minutes, repeat this 5 times for a total of 45 minutes; S2. Measure blood oxygen saturation: Use photoplethysmography to measure: (1) Measure heart rate, n heartbeat cycles as one time unit t, and measure the reference oxygen saturation SaO0; (2) Block for one time unit, release the pressure within one heartbeat cycle, and immediately measure the oxygen saturation SaO1. Block for two time units to obtain SaO2. After k times, measure SaOK. (3) With t as the independent variable and SaO as the dependent variable, the Gaussian formula is used for fitting. After obtaining the Gaussian parameters, the time is calculated based on the lower limit of the allowable oxygen saturation value. This time is the maximum time of a single block. The maximum time is m (0-1) times the maximum time as the safe training time.

2. The blood oxygen saturation algorithm under ischemic preconditioning training according to claim 1, characterized in that: In the S1, the ischemic preconditioning training device adopts an original pump pressure intelligent technology, which conforms to relevant practical verification. It can activate limb adenosine, bradykinin, nitric oxide and other protective factors in large quantities instantly through external intervention and regular short-term blocking of limb, upper or lower limb arterial and venous blood flow. After repeated short-term ischemia and reperfusion, it can achieve the effect of ischemic adaptation, which plays an important role in the protection of cardiovascular and cerebrovascular and other organs, and is an effective way to protect cardiovascular and cerebrovascular organs from the source.

3. The blood oxygen saturation algorithm under ischemic preconditioning training according to claim 1, characterized in that: In the above S1, before the blood pressure measurement mode is selected to measure the blood pressure, the main arm strap is tied to the upper arm of the tester, and when the ischemic preconditioning training device is operated, the control unit controls the air pump to inflate the inflatable air bag, and the air pressure monitoring unit detects the pressure P of the inflatable air bag and transmits the detection result to the control unit. The control unit is provided with a pressure evaluation value Pz, and the control unit compares the detected pressure P with the pressure evaluation value Pz; When P≥Pz, the control unit controls the air pump to stop inflating the inflatable air bag, and controls the inflatable air bag to deflate, and the blood pressure detection module performs blood pressure detection; when P<Pz, the control unit controls the air pump to continue inflating the inflatable air bag until P≥Pz; when the blood pressure detection is completed, the display screen or the display unit displays the detection result, and the storage unit stores the detection result.

4. The blood oxygen saturation algorithm under ischemic preconditioning training according to claim 1, characterized in that: In S2, the photoelectric volumetric pulse wave method uses a photoelectric sensor to collect the photoelectric volumetric pulse wave signal at the pulse. The photoelectric sensor is composed of two light-emitting diodes and a photoelectric receiving tube. There are two ways to place the photoelectric sensor at the position of the measured arm: Method 1, arranged according to the reflection principle: using a jaw pad to place two light-emitting diodes and a photoelectric receiving tube on the same side of the arm; Method 2, arranged according to the transmission principle: using a jaw pad to place two light-emitting diodes on one side of the arm, and the photoelectric receiving tube on the other side of the arm, and the positions of the two light-emitting diodes and the photoelectric receiving tube are opposite.

5. The blood oxygen saturation algorithm under ischemic preconditioning training according to claim 1, characterized in that: In S2(3), the frequency response curve of the transducer is modeled as a Gaussian function, and h(t) and Specifically, h(t) represents the impulse response of the receiver, as follows: Where ω0 is the center frequency of the transducer and σ is the bandwidth of the receiver.

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