CN111672001A

CN111672001A - Intelligent control device for oxygen therapy

Info

Publication number: CN111672001A
Application number: CN202010486610.2A
Authority: CN
Inventors: 顾文超; 孙万驹; 王林宣; 金文静; 周海; 栾丽娜; 朱兆丰
Original assignee: Shanghai Pudong New Area Peoples Hospital
Current assignee: Shanghai Pudong New Area Peoples Hospital
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-09-18

Abstract

The invention discloses an intelligent control device for oxygen therapy, which comprises a first air inlet pipe connected with an oxygen bottle, an oxygen mask with an oxygen delivery pipe, an oxygen delivery control device and an intelligent control system, wherein the oxygen delivery control device and the intelligent control system are connected with the first air inlet pipe, the oxygen delivery control device is used for controlling the mixing ratio of air and oxygen, the oxygen delivery control device comprises a mixing chamber and an electromagnetic proportional valve, the electromagnetic proportional valve is connected with the air inlet pipe, the intelligent control system comprises a single chip microcomputer, the output end of the single chip microcomputer is connected with the electromagnetic proportional valve and is used for controlling the flow of oxygen, and the mixing chamber comprises a first air inlet pipe connected with the electromagnetic proportional valve, a second air inlet pipe communicated with air and a first air outlet. The invention can automatically and continuously adjust the mixing ratio of the air and the oxygen and fully mix the air and the oxygen, and can also heat and humidify the mixed gas, thereby avoiding the dry and cold gas from damaging the mucous membrane of the air passage.

Description

Intelligent control device for oxygen therapy

Technical Field

The invention relates to the technical field of oxygen therapy devices, in particular to an intelligent oxygen therapy control device.

Background

Chronic obstructive pulmonary disease (chronic obstructive pulmonary disease or COPD for short) is a common disease and frequently encountered disease which seriously endanger human health, and brings heavy economic burden to patients, families and society thereof. The study on the lung health of Chinese adults (CPHS) in 2018 shows that the prevalence rate of chronic obstructive pulmonary disease of adults 20 years old or more is 8.6%, and the prevalence rate of chronic obstructive pulmonary disease of adults 40 years old or more is 13.7%, and the number of chronic obstructive pulmonary disease patients in China is nearly 1 hundred million, which is clear for the first time, and the chronic obstructive pulmonary disease forms a serious disease burden. According to the global disease burden research project, the slow-obstructive lung will be located at the 3 rd position of the global death cause in 2020. The world bank/WHO data indicates that chronic obstructive pulmonary disease will be at the 5 th of the world's disease economic burden by 2020. The oxygen therapy position list is the top of four basic principles (including healthy diet, respiratory exercise, long-term oxygen therapy and good mood) after the slow obstructive pulmonary disease is discharged. Patients with chronic obstructive pulmonary disease with respiratory failure have hypoxemia, and it is essential to correct the patient's hypoxia status and adjust the blood oxygen concentration for the treatment of chronic obstructive pulmonary disease. Long-term oxygen therapy can improve lung function and improve life quality of patients. Oxygen therapy is one of the important means for clinically curing patients with respiratory failure. Indications of oxygen therapy adaptation: when the indoor air is breathed, the partial pressure of the arterial blood oxygen is less than 7.3kPa (55mmHg) or the oxygen saturation of the arterial blood is within the range of 0.95-0.98; this is the most prominent indication for long-term oxygen therapy. The oxygen therapy aims to prevent the slow obstructive pulmonary disease from generating serious hypoxia phenomenon during rest, sleep and activity of a patient, eliminate the adverse effects of chronic hypoxia on health, such as correcting hypoxemia, reducing pulmonary artery pressure, delaying the progress of pulmonary heart disease and the like, finally prolong the survival time of the patient, improve the life quality and improve the prognosis of the patient. Oxygen therapy is a therapeutic approach that plays a major role in the treatment of critically ill respiratory failure patients. Conventional oxygen therapy devices are not sufficiently humidified to inhale oxygen, and the continuous flow of oxygen may cause drying damage to the airway mucosa to varying degrees. After the patient inhales cold air, the cold air is not beneficial to the airway mucous membrane to effectively remove secretion, and the chronic inflammation of the airway is aggravated to different degrees.

Disclosure of Invention

The invention aims to provide an intelligent control device for oxygen therapy, which can automatically and continuously adjust the mixing ratio of air and oxygen and fully mix the air and the oxygen, and can also heat and humidify mixed gas to avoid the dry and cold gas from damaging airway mucosa.

In order to achieve the purpose, the invention provides the following technical scheme: an oxygen therapy intelligent control device comprises a first air inlet pipe connected with an oxygen bottle, an oxygen mask with an oxygen delivery pipe, an oxygen delivery control device and an intelligent control system, wherein the oxygen delivery control device is connected with the first air inlet pipe and is used for controlling the mixing proportion of air and oxygen; the PID control algorithm comprises a preset standard blood oxygen saturation range, the blood oxygen saturation detector detects the finger tip arterial blood oxygen saturation value of the patient, the finger tip arterial blood oxygen saturation value is transmitted to the processing circuit, and the processing circuit controls the power supply current of the electromagnetic proportional valve until the acquired finger tip arterial blood oxygen saturation value of the patient is in the standard blood oxygen saturation range; the mixing chamber comprises a first air inlet pipe connected with the electromagnetic proportional valve, a second air inlet pipe communicated with air and a first air outlet, and the second air inlet pipe is connected with the air pump and used for introducing air flow with constant pressure into the mixing chamber; the mixing chamber comprises an arc-shaped side wall arranged along the air inlet direction of the first air inlet pipe, the air inlet direction of the second air inlet pipe is perpendicular to the air inlet direction of the first air inlet pipe, and a flow equalizing net is arranged at the position, close to the second air inlet pipe, of the mixing chamber; the first air outlet of the mixing chamber is connected with a humidifying device, the humidifying device is used for generating warm mist, the humidifying device comprises a second air outlet, and the second air outlet is connected with an oxygen conveying pipe and used for conveying the humidified mixed gas to an oxygen mask through the oxygen conveying pipe.

Preferably, the first outlet is provided with a first manual valve and a gas flowmeter.

Preferably, humidification device includes third air inlet and second water inlet, first gas outlet is connected with the third air inlet, humidification device still includes interconnect's heating jar and atomizer, be equipped with the heater in the heating jar, just be equipped with temperature sensor in the heating jar, the output electric connection of heater and singlechip, temperature sensor is connected with the input electricity of singlechip.

Preferably, humidification device still includes the automatic mechanism of adding water, the heating jar includes first water inlet and first delivery port, the automatic mechanism of adding water includes the water pump that links to each other with first water inlet and sets up the level sensor in the heating jar, the water pump is connected with the storage water tank, level sensor and the input electric connection of singlechip, the output electric connection of water pump and singlechip.

Preferably, the first water outlet of the heating tank is connected with the second water inlet of the atomizer, the third air inlet of the atomizer is connected with the first air outlet, and the third air inlet and the second air outlet are arranged on two sides of the atomizer.

Preferably, the atomizer includes atomizer, the arc cover that flow equalizes is installed to atomizer front end, flow equalize and cover and to have seted up a plurality of pores.

Preferably, the intelligent control system further comprises a blood oxygen saturation detector electrically connected with the input end of the single chip microcomputer and used for detecting the arterial blood oxygen saturation of the finger tip of the patient.

Preferably, the blood oxygen saturation detector comprises a first red light emitter and a second red light emitter which emit light with different wavelengths and a photoelectric detector for receiving reflected light of the first red light emitter and the second red light emitter.

Preferably, the photodetector includes a signal analyzing circuit for analyzing and processing the electric signal detected by the photodetector and varying periodically with the pulse.

Preferably, the electromagnetism proportional valve include the circular telegram coil and the circular telegram coil passes through spring coupling's ferromagnetic block, the ferromagnetic block is kept away from the one end of spring and is equipped with the separation blade, the separation blade pass a lateral wall of first intake pipe with first intake pipe activity sealing connection.

Compared with the prior art, the invention has the beneficial effects that:

the oxygen delivery control device with the mixing chamber and the electromagnetic proportional valve is arranged, so that the mixing proportion of air and oxygen can be automatically and continuously adjusted and the air and the oxygen can be fully mixed; and set up humidification device through the first gas outlet at the mixing chamber for produce warm fog, can heat the humidification processing to the mist, avoid dry and cold gas to cause the damage to the air flue mucous membrane.

By providing the first manual valve and the gas flow meter, the total intake air flow rate can be manually adjusted for the indication of the gas flow meter.

Set up automatic mechanism of adding water, including with the input electric connection's of singlechip level sensor and with the output electric connection's of singlechip water pump, can add water to the heating tank is automatic.

The oxyhemoglobin saturation detector electrically connected with the input end of the single chip microcomputer is arranged, so that the oxyhemoglobin saturation of the artery at the finger end of a patient can be detected.

Drawings

Fig. 1 is a schematic structural connection diagram of an intelligent control device for oxygen therapy according to the present invention;

FIG. 2 is a schematic structural view of a first electromagnetic proportional valve of an intelligent control device for oxygen therapy according to the present invention;

fig. 3 is a circuit connection block diagram of an intelligent control device for oxygen therapy according to the present invention.

In the figure: 1. an oxygen cylinder; 201. a mixing chamber; 2011. a first intake pipe; 2012. a second intake pipe; 2013. a first air outlet; 2014. an air pump; 2015. an arcuate sidewall; 2016. a flow equalization net; 202. an electromagnetic proportional valve; 2021. an electrified coil; 2022. a ferromagnetic block; 2023. a spring; 2024. a baffle plate; 203. an oxygen delivery tube; 204. an oxygen mask; 205. a first manual valve; 206. a gas flow meter; 301. a second air outlet; 302. a heating tank; 3021. a first water inlet; 3022. a first water outlet; 3023. a heater; 3024. a temperature sensor; 303. an atomizer; 3031. an atomizing spray head; 3032. an arc-shaped flow equalizing cover; 3041. a water pump; 3042. a liquid level sensor; 4. a water storage tank.

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.

As shown in fig. 1, in an embodiment of the present invention, an oxygen therapy intelligent control device includes a first air inlet pipe 2011 connected to an oxygen cylinder 1, an oxygen mask 204 with an oxygen delivery pipe 203, an oxygen delivery control device and an intelligent control system connected to the first air inlet pipe 2011, the oxygen supply control device is used for controlling the mixing proportion of air and oxygen, and comprises a mixing chamber 201 and an electromagnetic proportional valve 202, the electromagnetic proportional valve 202 is connected with an air inlet pipe, the intelligent control system comprises a singlechip and a blood oxygen saturation detector electrically connected with the input end of the singlechip, the output end of the singlechip is connected with the electromagnetic proportional valve 202, the oxyhemoglobin saturation detector is used for detecting the arterial oxyhemoglobin saturation of the finger tip of a patient, and the single chip microcomputer comprises a processing circuit which is configured with a PID control algorithm; the PID control algorithm comprises a preset standard oxyhemoglobin saturation range, the oxyhemoglobin saturation detector detects the finger tip arterial oxyhemoglobin saturation value of a patient, the finger tip arterial oxyhemoglobin saturation value is transmitted to the processing circuit, the processing circuit controls the power supply current of the electromagnetic proportional valve (the part of the processing circuit controlling the power supply current is the prior art, the part can be realized through the PWM control circuit, and the description is omitted here), and the detected finger tip arterial oxyhemoglobin saturation value of the patient is in the standard oxyhemoglobin saturation range; the proportional solenoid valve is an actuating mechanism for converting electric pulse into valve core displacement, can realize stepless regulation of pressure and speed, avoids the impact phenomenon when a normally-open switch type gas valve is reversed, ensures that oxygen is stable when being output, can continuously regulate the valve opening of the proportional solenoid valve according to a control signal sent by a singlechip, and improves the accuracy and the safety of oxygen inhalation therapy. The mixing chamber 201 comprises a first air inlet pipe 2011 connected with the electromagnetic proportional valve 202, a second air inlet pipe 2012 communicated with air and a first air outlet 2013, wherein the second air inlet pipe 2012 is connected with the air pump 2014 and is used for introducing air flow with constant pressure into the mixing chamber 201; the mixing chamber 201 comprises an arc-shaped side wall 2015 arranged along the air inlet direction of a first air inlet pipe 2011, and air entering the mixing chamber 201 through the first air inlet pipe 2011 is accelerated in airflow through the arc-shaped side wall 2015, so that the rotation speed of the airflow can be accelerated, and the air and oxygen can be rapidly mixed; the direction of admitting air and the first intake pipe 2011 direction of admitting air mutually perpendicular of second intake pipe 2012, just mixing chamber 201 is close to second intake pipe 2012 and is equipped with flow equalizing net 2016, and the setting of flow equalizing net 2016 and the structural design of two directions of admitting air of mutually perpendicular can make the homogeneous mixing of air and oxygen to this realizes the abundant even mixture of oxygen and air. The first air outlet 2013 of the mixing chamber 201 is connected with a humidifying device, the humidifying device is used for generating warm mist, the humidifying device comprises a second air outlet 301, the second air outlet 301 is connected with the oxygen delivery pipe 203 and used for delivering the humidified mixed gas to the oxygen mask 204 through the oxygen delivery pipe 203, the warm mist and the mist are favorable for diluting and removing airway mucous membrane secretions, and the airway is purified and the ventilation effect is obviously improved.

Preferably, the first outlet is provided with a first manual valve 205 and a gas flow meter 206, and the total intake air flow rate can be manually adjusted according to the indication of the gas flow meter 206.

Preferably, the humidifying device includes a third air inlet and a second water inlet, the first air outlet 2013 is connected with the third air inlet, the humidifying device further includes a heating tank 302 and an atomizer 303 which are connected with each other, a heater 3023 is arranged in the heating tank 302, a temperature sensor 3024 is arranged in the heating tank 302, the heater 3023 is electrically connected with an output end of the single chip microcomputer, and the temperature sensor 3024 is electrically connected with an input end of the single chip microcomputer, so that an effect of heating water in the heating tank 302 to a proper temperature can be realized.

Preferably, the humidifying device further comprises an automatic water adding mechanism, the heating tank 302 comprises a first water inlet 3021 and a first water outlet 3022, the automatic water adding mechanism comprises a water pump 3041 connected with the first water inlet 3021 and a liquid level sensor 3042 arranged in the heating tank 302, the water pump 3041 is connected with the water storage tank 4, the liquid level sensor 3042 is electrically connected with the input end of the single chip microcomputer, and the water pump 3041 is electrically connected with the output end of the single chip microcomputer; water level detection by the level sensor 3042 allows automatic water addition into the heating tank 302.

Preferably, the first water outlet 3022 of the heating tank 302 is connected to the second water inlet of the atomizer 303, the third air inlet of the atomizer 303 is connected to the first air outlet 2013, and the third air inlet and the second air outlet 301 are disposed on two sides of the atomizer 303.

Preferably, the atomizer 303 includes an atomizer 3031, an arc flow equalizing cover 3032 is installed at the front end of the atomizer 3031, and a plurality of pores are formed in the flow equalizing cover, so that the sprayed warm mist is more uniform.

As shown in fig. 2, the electromagnetic proportional valve 202 includes an electrical coil 2021 and a ferromagnetic block 2022 connected to the electrical coil 2021 through a spring 2023, one end of the ferromagnetic block 2022 away from the spring 2023 is provided with a blocking piece 2024, and the blocking piece 2024 passes through a side wall of the first air inlet pipe 2011 and is movably and hermetically connected to the first air inlet pipe 2011; the size of the current passing through the electrified coil 2021 is adjusted, that is, the size of the attraction force of the electrified coil 2021 to the ferromagnetic block 2022 can be adjusted, and then the proportion of the cross-sectional area of the baffle plate 2024 occupied in the first air inlet pipe 2011 can be adjusted, so that the air inlet flow of the first air inlet pipe 2011 is adjusted.

As shown in fig. 3, a circuit connection block diagram of the intelligent control device for oxygen therapy is shown, in which a liquid level sensor 3042 is electrically connected to an input terminal of a single chip microcomputer, a water pump 3041 is electrically connected to an output terminal of the single chip microcomputer, and water can be automatically added into the heating tank 302 by detecting a water level by the liquid level sensor 3042. The intelligent control system also comprises a blood oxygen saturation detector electrically connected with the input end of the single chip microcomputer and used for detecting the arterial blood oxygen saturation of the finger tip of the patient. The blood oxygen saturation detector comprises a first red light emitter and a second red light emitter which emit light with different wavelengths and a photoelectric detector for receiving the reflected light of the first red light emitter and the second red light emitter. The oxygen therapy effect is almost an instant effect, and with the increase of the oxygen flow, especially the increase of the oxygen flow in a short period, the partial pressure of the blood oxygen in the artery of a patient can be rapidly improved, and the physical state is obviously improved, so that the real-time monitoring of the oxygen therapy effect in the oxygen therapy process is very important, and the purpose of improving the oxygen deficiency can be rapidly achieved through monitoring feedback and synchronous adjustment.

Specifically, the emission wavelength of the first red light emitter is 660nm, the emission wavelength of the second red light emitter is 940nm, the amount of absorption of oxyhemoglobin to the wavelength of 660nm is small, the absorption to the red light with the wavelength of 940nm is large, hemoglobin is just opposite to oxyhemoglobin, the amount of absorption of hemoglobin to the wavelength of 660nm is large, the amount of absorption to the red light with the wavelength of 940nm is small, and the oxygenation degree of hemoglobin can be determined by judging the absorption ratio of the two red lights through a signal analysis circuit.

Preferably, the arterial blood oxygen saturation is controlled to be within the range of 0.95-0.98.

The working principle is as follows: by arranging the oxygen delivery control device with the mixing chamber 201 and the electromagnetic proportional valve 202, the mixing proportion of air and oxygen can be automatically and continuously adjusted and the air and oxygen can be fully mixed; the humidifying device is arranged at the first air outlet 2013 of the mixing chamber 201 and used for generating warm mist, the mixed air can be heated and humidified, and damage of dry and cold air to air passage mucous membranes is avoided; the oxyhemoglobin saturation detector electrically connected with the input end of the single chip microcomputer is arranged, so that the oxyhemoglobin saturation of the artery at the finger end of a patient can be detected, the oxyhemoglobin saturation information is transmitted to the single chip microcomputer through the oxyhemoglobin saturation detector, and the single chip microcomputer controls the opening degree of the electromagnetic proportional valve 202 to adjust the mixing ratio of oxygen and air.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. 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.

Claims

1. An oxygen therapy intelligent control device comprises an air inlet pipe connected with an oxygen bottle and an oxygen mask with an oxygen delivery pipe, and is characterized by further comprising an oxygen delivery control device and an intelligent control system which are connected with the air inlet pipe, wherein the oxygen delivery control device is used for controlling the mixing proportion of air and oxygen, the oxygen delivery control device comprises a mixing chamber and an electromagnetic proportional valve, the electromagnetic proportional valve is connected with the air inlet pipe, the intelligent control system comprises a single chip microcomputer and a blood oxygen saturation detector which is electrically connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the electromagnetic proportional valve and is used for controlling the flow of the oxygen, the blood oxygen saturation detector is used for detecting the arterial blood oxygen saturation of a finger tip of a patient, the single chip microcomputer comprises a processing circuit, and the processing circuit is configured with; the PID control algorithm comprises a preset standard blood oxygen saturation range, the blood oxygen saturation detector detects the finger tip arterial blood oxygen saturation value of the patient, the finger tip arterial blood oxygen saturation value is transmitted to the processing circuit, and the processing circuit controls the power supply current of the electromagnetic proportional valve until the acquired finger tip arterial blood oxygen saturation value of the patient is in the standard blood oxygen saturation range;

the mixing chamber comprises a first air inlet pipe connected with the electromagnetic proportional valve, a second air inlet pipe communicated with air and a first air outlet, and the second air inlet pipe is connected with the air pump and used for introducing air flow with constant pressure into the mixing chamber; the mixing chamber comprises an arc-shaped side wall arranged along the air inlet direction of the first air inlet pipe, the air inlet direction of the second air inlet pipe is perpendicular to the air inlet direction of the first air inlet pipe, and a flow equalizing net is arranged at the position, close to the second air inlet pipe, of the mixing chamber; the first air outlet of the mixing chamber is connected with a humidifying device, the humidifying device is used for generating warm mist, the humidifying device comprises a second air outlet, and the second air outlet is connected with an oxygen conveying pipe and used for conveying the humidified mixed gas to an oxygen mask through the oxygen conveying pipe.

2. The intelligent control device for oxygen therapy according to claim 1, characterized in that: and a first manual valve and a gas flowmeter are arranged at the first outlet.

3. The intelligent control device for oxygen therapy according to claim 1, characterized in that: humidification device includes third air inlet and second water inlet, first gas outlet is connected with the third air inlet, humidification device still includes interconnect's heating jar and atomizer, be equipped with the heater in the heating jar, just be equipped with temperature sensor in the heating jar, the output electric connection of heater and singlechip, temperature sensor is connected with the input electricity of singlechip.

4. The intelligent control device for oxygen therapy according to claim 3, characterized in that: humidification device still includes the automatic mechanism that adds water, the heating jar includes first water inlet and first delivery port, the automatic mechanism that adds water includes the water pump that links to each other with first water inlet and sets up the level sensor in the heating jar, the water pump is connected with the storage water tank, level sensor and the input electric connection of singlechip, the output electric connection of water pump and singlechip.

5. The intelligent control device for oxygen therapy according to claim 4, characterized in that: the first delivery port of heating jar is connected with the second water inlet of atomizer, the third air inlet of atomizer is connected with first gas outlet, third air inlet and second gas outlet set up the both sides at the atomizer.

6. An intelligent control device for oxygen therapy according to any one of claims 3-5, characterized in that: the atomizer includes atomizer, the arc cover that flow equalizes is installed to atomizer front end, flow equalize and cover and to have seted up a plurality of pores.

7. The intelligent control device for oxygen therapy as claimed in claim 1, wherein: the intelligent control system also comprises a blood oxygen saturation detector electrically connected with the input end of the single chip microcomputer and used for detecting the arterial blood oxygen saturation of the finger tip of the patient.

8. An intelligent control device for oxygen therapy according to claim 7, characterized in that: the blood oxygen saturation detector comprises a first red light emitter and a second red light emitter which emit light with different wavelengths and a photoelectric detector for receiving the reflected light of the first red light emitter and the second red light emitter.

9. An intelligent control device for oxygen therapy according to claim 8, characterized in that: the photoelectric detector comprises a signal analysis circuit which is used for analyzing and processing the electric signal which is detected by the photoelectric detector and changes with the pulse period.

10. The intelligent control device for oxygen therapy as claimed in claim 1, wherein: the electromagnetic proportional valve comprises an electrified coil and a ferromagnetic block connected with the electrified coil through a spring, wherein a blocking piece is arranged at one end, far away from the spring, of the ferromagnetic block, and the blocking piece penetrates through one side wall of the first air inlet pipe and is movably and hermetically connected with the first air inlet pipe.