阅读说明：本技术 一种依据生理信息的供氧控制方法 (Oxygen supply control method according to physiological information ) 是由 孙永波 郭士杰 于 2021-07-26 设计创作，主要内容包括：本发明公开一种依据生理信息的供氧控制方法,该方法首先采集飞行员的即时血氧饱和度、心率、吸氧浓度以及座舱压力,并根据上述数据计算出期望吸氧浓度。然后根据期望吸氧浓度来对实时吸氧浓度进行调节,并根据生理指标以及血氧饱和度进行相应的吸氧浓度逐渐降低、吸入气体压力、供给纯氧、发出警报操作,使得飞行员的供氧维持在正常水平或者根据警报采取后续应急措施。该供氧控制方法设计合理,能够有效调控飞行员的供氧状态,使其生理指标保持在正常的状态。(The invention discloses an oxygen supply control method according to physiological information. And then adjusting the real-time oxygen uptake concentration according to the expected oxygen uptake concentration, and performing corresponding operations of gradually reducing the oxygen uptake concentration, absorbing gas pressure, supplying pure oxygen and giving an alarm according to the physiological index and the blood oxygen saturation so that the oxygen supply of a pilot is maintained at a normal level or follow-up emergency measures are taken according to the alarm. The oxygen supply control method is reasonable in design, and can effectively regulate and control the oxygen supply state of the pilot to keep the physiological indexes of the pilot in a normal state.)

1. An oxygen supply control method based on physiological information is characterized by comprising the following steps:

step 1: acquiring the instantaneous blood oxygen saturation, the heart rate, the oxygen inhalation concentration and the cockpit pressure of a pilot, and calculating the expected oxygen inhalation concentration according to the data;

step 2: adjusting the value of the real-time oxygen uptake concentration according to the expected oxygen uptake concentration calculated in the step 1, and gradually reducing the oxygen uptake concentration to a normal oxygen supply value if the blood oxygen saturation is detected to be increased; if the blood oxygen saturation degree cannot be detected to be increased, the pressure of inhaled air is increased, and the equal ratio of the clothing punching to the air pressure is increased;

and step 3: after the pressure of the inhaled gas is increased, collecting physiological indexes and judging whether the inhaled gas is normal or not, if the inhaled gas is normal, gradually reducing the pressure of the inhaled gas, and gradually reducing the oxygen inhalation concentration to a normal oxygen supply value; if the physiological index is abnormal, an alarm signal is sent out;

and 4, step 4: after the oxygen absorption concentration is gradually reduced to a normal oxygen supply value, continuously collecting physiological indexes and judging whether the oxygen absorption concentration is normal or not, and if the oxygen absorption concentration is normal, keeping the current state; if the physiological index is abnormal, judging whether the current blood oxygen saturation value is lower than 80%; if the current blood oxygen saturation value is lower than 80%, supplying pure oxygen for 1 minute, and if the current blood oxygen saturation value is not lower than 80%, skipping to the step 1 to perform circulating oxygen supply control;

and 5: after supplying pure oxygen for 1 minute, if the current blood oxygen saturation value is not lower than 80%, skipping to the step 1 to perform circulating oxygen supply control; and if the current blood oxygen saturation value is lower than 80%, sending out an alarm signal.

2. The method as claimed in claim 1, wherein the desired oxygen concentration is calculated by calling a relation function between related data in a historical database and calculating according to the instantaneous data.

3. The method as claimed in claim 1, wherein the normal oxygen supply value is a set value.

4. The method as claimed in claim 1, wherein the physiological index and corresponding normal range are as follows: the blood oxygen saturation is more than 90 percent or the partial pressure of the blood oxygen of the artery is more than 60mmHg, the pH value of the arterial blood is 7.35-7.45, the partial pressure of the carbon dioxide of the artery is 40 mmHg-45 mmHg: 12/min < respiratory rate < 28/min, end tidal carbon dioxide partial pressure <55 mmHg.

Technical Field

The invention relates to the field of breathing machines, in particular to an oxygen supply control method according to physiological information.

Background

When the 'natural environment' on the ground where people live and live leaves generations rises to the high altitude, the environment with sudden change of atmospheric pressure is firstly encountered, namely, the environment enters the extremely severe external environments with low air pressure, sudden change of air temperature, radiation enhancement and the like from the earth of long-term life of the people, so that the normal life activities are threatened. High air pressure environmental factors or conditions can be so important for human flight activities because their changes can cause a series of physiological effects, wherein the strong one, or the long action time or the fast change time, can make the human physiological effect too violent, exceed the tolerance limit, and cause the flight incapacity to affect the flight control. The change of the atmospheric pressure environment causes pathological changes of the human body, or incurs functional influence or organic injury. The aviation oxygen supply equipment is aviation protection equipment which can prevent flight personnel or passengers from being damaged by high-altitude low-voltage factors by artificially creating a micro environment. The breathing protection system is mainly composed of an aviation oxygen supply mask or a pressurizing helmet, a high altitude compensation clothes, an oxygen regulator and an oxygen source for a pilot. The aeronautical oxygen supply protective equipment is a product of the development of aircraft tactical technical performance, and the protective performance of the aeronautical oxygen supply protective equipment is continuously improved and perfected along with the improvement of the performance of the aeronautical oxygen supply protective equipment.

Physiologically, hypoxia refers to a pathological process in which abnormal changes may occur in the metabolism, function, and even morphology of tissues and cells when the tissues and cells do not obtain sufficient oxygen, or oxygen deficiency, and oxygen cannot be fully utilized, and can be further classified into hypotonic hypoxia, blood hypoxia, circulatory hypoxia, and tissue hypoxia according to the causes of hypoxia and the characteristics of blood-gas changes.

High altitude hypoxia belongs to hypotonic hypoxia, and is mainly characterized in that the high altitude hypoxia can be divided into three types of fulminant high altitude hypoxia, acute high altitude hypoxia and chronic high altitude hypoxia due to the fact that the partial pressure of inhaled oxygen is too low and the severity, the development speed of hypoxia and the exposure time are different. In the field of aviation, explosive high altitude anoxia and acute high altitude anoxia are common, and meanwhile, the phenomenon of over ventilation also exists.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides an oxygen supply control method according to physiological information. According to the oxygen supply control method, the expected oxygen inhalation concentration is calculated by collecting oxygen supply related parameters, and the oxygen inhalation concentration and the inhaled gas pressure are adjusted by measuring the parameters in real time, so that the oxygen supply of a pilot is maintained at a normal level or alarm information is sent out.

The technical scheme of the invention is as follows: designing an oxygen supply control method according to physiological information, which is characterized by comprising the following steps:

step 1: acquiring the instantaneous blood oxygen saturation, the heart rate, the oxygen inhalation concentration and the cockpit pressure of a pilot, and calculating the expected oxygen inhalation concentration according to the data;

step 2: adjusting the value of the real-time oxygen uptake concentration according to the expected oxygen uptake concentration calculated in the step 1, and gradually reducing the oxygen uptake concentration to a normal oxygen supply value if the blood oxygen saturation is detected to be increased; if the blood oxygen saturation degree cannot be detected to be increased, the pressure of inhaled air is increased, and the equal ratio of the clothing punching to the air pressure is increased;

and step 3: after the pressure of the inhaled gas is increased, collecting physiological indexes and judging whether the inhaled gas is normal or not, if the inhaled gas is normal, gradually reducing the pressure of the inhaled gas, and gradually reducing the oxygen inhalation concentration to a normal oxygen supply value; if the physiological index is abnormal, an alarm signal is sent out;

and 4, step 4: after the oxygen absorption concentration is gradually reduced to a normal oxygen supply value, continuously collecting physiological indexes and judging whether the oxygen absorption concentration is normal or not, and if the oxygen absorption concentration is normal, keeping the current state; if the physiological index is abnormal, judging whether the current blood oxygen saturation value is lower than 80%; if the current blood oxygen saturation value is lower than 80%, supplying pure oxygen for 1 minute, and if the current blood oxygen saturation value is not lower than 80%, skipping to the step 1 to perform circulating oxygen supply control;

and 5: after supplying pure oxygen for 1 minute, if the current blood oxygen saturation value is not lower than 80%, skipping to the step 1 to perform circulating oxygen supply control; and if the current blood oxygen saturation value is lower than 80%, sending out an alarm signal.

Compared with the prior art, the invention has the beneficial effects that: according to the oxygen supply control method based on the physiological information, the instantaneous blood oxygen saturation, the heart rate, the oxygen inhalation concentration and the cabin pressure of a pilot are collected firstly, and the expected oxygen inhalation concentration is calculated according to the data. And then adjusting the real-time oxygen uptake concentration according to the expected oxygen uptake concentration, and performing corresponding operations of gradually reducing the oxygen uptake concentration, absorbing gas pressure, supplying pure oxygen and giving an alarm according to the physiological index and the blood oxygen saturation so that the oxygen supply of a pilot is maintained at a normal level or follow-up emergency measures are taken according to the alarm. The oxygen supply control method is reasonable in design, and can effectively regulate and control the oxygen supply state of the pilot to keep the physiological indexes of the pilot in a normal state.

Drawings

FIG. 1 is a logic diagram of the oxygen supply control method according to physiological information.

Detailed Description

The invention provides an oxygen supply control method according to physiological information, which specifically comprises the following steps:

step 1: acquiring the instantaneous blood oxygen saturation, the heart rate, the oxygen inhalation concentration and the cockpit pressure of a pilot, and calculating the expected oxygen inhalation concentration according to the data;

step 2: adjusting the value of the real-time oxygen uptake concentration according to the expected oxygen uptake concentration calculated in the step 1, and gradually reducing the oxygen uptake concentration to a normal oxygen supply value if the blood oxygen saturation is detected to be increased; if the blood oxygen saturation degree is not detected to be increased, the pressure of inhaled air is increased, and the ratio of the clothes punching pressure to the air pressure is increased.

And step 3: after the pressure of the inhaled gas is increased, collecting physiological indexes and judging whether the inhaled gas is normal or not, if the inhaled gas is normal, gradually reducing the pressure of the inhaled gas, and gradually reducing the oxygen inhalation concentration to a normal oxygen supply value; if the physiological index is abnormal, an alarm signal is sent out.

And 4, step 4: after the oxygen absorption concentration is gradually reduced to a normal oxygen supply value, continuously collecting physiological indexes and judging whether the oxygen absorption concentration is normal or not, and if the oxygen absorption concentration is normal, keeping the current state; if the physiological index is abnormal, judging whether the current blood oxygen saturation value is lower than 80%; if the current blood oxygen saturation value is lower than 80%, supplying pure oxygen for 1 minute, and if the current blood oxygen saturation value is not lower than 80%, skipping to the step 1 to perform circulating oxygen supply control;

and 5: after supplying pure oxygen for 1 minute, if the current blood oxygen saturation value is not lower than 80%, skipping to the step 1 to perform circulating oxygen supply control; and if the current blood oxygen saturation value is lower than 80%, sending out an alarm signal.

The calculation method of the expected oxygen uptake concentration is obtained by calling a relation function between related data in a historical database and calculating according to instant data.

The normal oxygen supply value is a set value.

The collected physiological indexes and corresponding normal ranges are as follows: the blood oxygen saturation is more than 90 percent or the partial pressure of the blood oxygen of the artery is more than 60mmHg, the pH value of the arterial blood is 7.35-7.45, the partial pressure of the carbon dioxide of the artery is 40 mmHg-45 mmHg: 12/min < respiratory rate < 28/min, end tidal carbon dioxide partial pressure <55 mmHg.

The respiratory rate is a parameter of gas exchange, reflects the speed of gas exchange of a human body, and the too high respiratory rate is generally a compensation reaction of the human body to hypoxia and is a signal for generating hypoxia.

The end-tidal carbon dioxide partial pressure (PetCO2) is the peak value of carbon dioxide concentration in the exhalation process, is an important respiratory index, and not only can detect the ventilation function, but also can reflect the circulation and the pulmonary blood flow condition.

The percentage of time with blood oxygen saturation < 90% per unit of monitored time (TS 90%) is an objective parameter. The lowest blood oxygen saturation (LSpO2) does not objectively reflect the occurrence frequency and duration of hypoxia, and only represents the instantaneous blood oxygen saturation. The oxygen reduction index (ODI) is the frequency of blood oxygen saturation decreases of 3% or more per hour.

The degree of hypoxia exhibited by blood oxygen saturation was associated with TS 90%, ODI and LSpO2 by 0.805, 0.946 and-0.711, respectively. The TS 90%, ODI and LSpO2 values are considered together to identify the current hypoxia status, and the variation range of one or two values is weighted to judge whether the current hypoxia status is serious.

Nothing in this specification is said to apply to the prior art.