An intelligent respiratory rehabilitation device that can assist in expectoration, pronunciation and assessment

By designing an intelligent respiratory rehabilitation device containing auxiliary components, absorbent parts, pressure sensors and terminals, the problem of insufficient functional independence and applicability in the prior art is solved, and the function of simultaneously assisting sputum, pronunciation and evaluation is realized. It is suitable for respiratory muscle rehabilitation exercises in patients with tracheostomy or tracheal intubation.

CN111658923BActive Publication Date: 2025-05-13GUANGZHOU TIANXI MEDICAL TECH CO LTD
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Patent Information

Application Number
CN202010536769.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-06-12
Publication Date
2025-05-13
Estimated Expiration
2040-06-12

AI Technical Summary

Technical Problem

In the prior art, the functional structure of the pronunciation of respiratory muscle rehabilitation exercise, sputum excretion, oxygen inhalation and tracheostomy patients is independent, and these rehabilitation functions cannot be achieved simultaneously, and there is a lack of respiratory muscle rehabilitation exercise products suitable for patients with tracheostomy or tracheointestination.

Method used

An intelligent breathing rehabilitation device is designed, including auxiliary components, water absorbent parts, pressure sensors and terminals. The gas flow channel is divided and connected through elastic parts and baffle structures. It combines the oscillation plate and resistance spring to generate oscillation waves, promotes the discharge of sputum, and provides humidized and heated oxygen through the oxygen connection port.

Benefits of technology

It realizes the function of assisting sputum excretion, pronunciation and evaluation at the same time. It is suitable for respiratory muscle rehabilitation exercises in patients with tracheotomy or tracheal intubation, and improves the ability of airway secretions to remove and pronunciation of patients.

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Abstract

The present invention relates to the field of rehabilitation assistance, and in particular to an intelligent respiratory rehabilitation device that can assist in expectoration, pronunciation and evaluation. The present invention is composed of an elastic member, an auxiliary component, a baffle, a water absorbent member, a pressure sensor and a terminal combination; an oxygen connection port is provided on the side of a first gas flow channel, and oxygen is supplied to the first gas flow channel through the oxygen connection port. When a patient inhales through a second gas flow channel and then pulls an oscillation plate, the oxygen in the first gas flow channel enters the second gas flow channel along the patient's inhalation. The patient can inhale oxygen by inhaling through the first gas flow channel and the second gas flow channel; the second gas flow channel is suitable for patients who need inspiratory muscle training, and they inhale through the second gas flow channel, and the inhalation pulls the oscillation plate to compress a resistance spring; the first gas flow channel is suitable for patients who need expiratory muscle training, and they exhale into the first gas flow channel, and the exhalation pushes the oscillation plate to compress the resistance spring; the oscillation plate moves back and forth to generate an oscillation wave, which promotes the removal of the patient's secretions.
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Description

Technical Field

[0001] The invention relates to the field of rehabilitation assistance, and in particular to an intelligent respiratory rehabilitation device capable of assisting sputum discharge, pronunciation and evaluation. Background Art

[0002] Dyspnea, cough and sputum are common symptoms of respiratory diseases. Dyspnea will affect the patient's ability to clear airway secretions. Increased airway secretions (sputum) will aggravate dyspnea. Therefore, it is necessary to improve dyspnea and clear airway secretions in a timely and effective manner.

[0003] When the patient's dyspnea is related to hypoxemia, oxygen inhalation is helpful to improve dyspnea. However, if the inhaled oxygen is not humidified and heated, it will cause the airway secretions to lose water, which can easily lead to the formation of sputum crust, further aggravating airway obstruction and dyspnea. For patients with tracheotomy and endotracheal intubation, since the inhaled gas bypasses the upper airway, the formation of sputum crust on the tracheotomy tube and endotracheal tube caused by insufficient humidification and heating of the inhaled gas is more common and its consequences will be more serious. Sputum crust on the tracheotomy tube and endotracheal intubation will lead to recurrent lung infections. In order to humidify and heat the inhaled gas, an external humidification and heating device can be used, or an artificial nose can be used.

[0004] The temperature of normal people's exhaled gas is 37℃, the relative humidity is 100%, and the absolute humidity is 44mg / L. When passing through the artificial nose that stores moisture and heat, the moisture and heat of the exhaled gas will be stored in the artificial nose. The next time you inhale, the gas passes through the artificial nose that stores moisture and heat, and the inhaled gas can be humidified and heated.

[0005] The process of coughing is: after the patient takes a deep breath, the vocal cords close, the expiratory muscles contract strongly, and the glottis closes suddenly, causing a sudden drop in airway pressure, and airway secretions are expelled by the jet airflow. Therefore, the ability to cough is related to the strength of the inspiratory and expiratory muscles. Respiratory muscles are skeletal muscles, and their rehabilitation exercises include strength training and endurance training; their strength training is performed by isometric contraction to overcome the maximum inspiratory resistance or the maximum expiratory resistance, and their endurance training is performed by repeated contraction under a certain load.

[0006] Rehabilitation exercises of respiratory muscles for patients undergoing mechanical ventilation are beneficial for shortening ventilation time and improving the success rate of weaning from the machine and removing the endotracheal tube or tracheotomy tube.

[0007] The ability to clear airway secretions is not only related to the strength of the inspiratory muscles and expiratory muscles, but also to the fluidity of sputum. The mechanical shock waves synchronized with inhalation or exhalation can cause the airway secretions to oscillate at a common frequency, which is beneficial to improving the fluidity of airway secretions and further improving the patient's ability to clear airway secretions.

[0008] When the condition of a tracheotomy patient improves and he or she has no breathing difficulties after treatment, the patient can speak with the help of an auxiliary device. The mechanism is as follows: the speech-assisting device has no resistance during inhalation but has resistance during exhalation. After the gas in the air bag of the patient's tracheotomy tube is completely exhausted, the speech-assisting device is connected to the tracheotomy tube. When the patient inhales, the gas passes through the auxiliary device and the tracheotomy tube to the lungs. When the patient exhales, since the exhalation resistance of the auxiliary device is higher than that of the upper airway, the exhaled gas is exhaled through the trachea, larynx, pharynx, and oral cavity above the tracheotomy opening. When the gas passes through the vocal cords of the larynx, the patient can speak.

[0009] At present, patents related to respiratory muscle rehabilitation training, expectoration, and oxygen inhalation equipment (such as: CN201420266534.4, CN201520495504.5 and 201320103951.2, US6581598 and US7059324) all have the following problems:

[0010] 1. The functional structures of expiratory muscle and inspiratory muscle training, nebulization inhalation, expiratory phase positive pressure, common frequency oscillation expectoration, oxygen inhalation, and assisted pronunciation for tracheotomy patients are all independent and cannot achieve these rehabilitation functions at the same time. Some have both respiratory muscle training and expectoration functions, but both functions are exclusive, that is, only one of them can be achieved.

[0011] 2. There are no products suitable for respiratory muscle rehabilitation exercises for tracheotomy or endotracheal intubation. Summary of the invention

[0012] In order to solve the above problems, the present invention provides an intelligent respiratory rehabilitation device that can assist in expectoration, pronunciation and evaluation, and its purpose is to solve the problem of single function of expectoration devices in the prior art.

[0013] The present invention provides an intelligent respiratory rehabilitation device that can assist in expectoration, pronunciation and evaluation. Another purpose is to solve the clinical problem that the medical products in the prior art are not suitable for rehabilitation training of respiratory muscles of tracheotomy or endotracheal intubation. To achieve the above purpose, the technical solution adopted by the present invention is: an intelligent respiratory rehabilitation device that can assist in expectoration, pronunciation and evaluation, characterized in that:

[0014] An auxiliary component, with open structures at both ends, an elastic member is provided inside the auxiliary component to divide the auxiliary component into a first gas flow channel and a second gas flow channel, and baffles located in the first gas flow channel and the second gas flow channel are provided on the inner wall of the auxiliary component, and the baffles are arranged in two opposite directions, the two baffles located in the first gas flow channel extend in the direction of the central axis of the auxiliary component and are not connected to each other, and the two baffles located in the second gas flow channel extend in the direction of the central axis of the auxiliary component and are not connected to each other, and the elastic member is formed by connecting a resistance spring and an oscillation plate, one end of the resistance spring is connected to the baffle of the second gas flow channel, and the oscillation plate is against the baffle of the first gas flow channel;

[0015] The water absorbing member is distributed in the first gas flow channel and the second gas flow channel area;

[0016] Pressure sensors are distributed in the first gas flow channel, the second gas flow channel and on the oscillating plate;

[0017] A terminal, connected to the pressure sensor signal;

[0018] Among them, the surface of the auxiliary component is provided with an oxygen connection port connected to the first gas flow channel, a first compensation one-way air inlet, and a second compensation one-way air outlet connected to the second gas flow channel, the inner wall of the first gas flow channel is provided with a first gas flow channel elastic sheet corresponding to the oxygen connection port and the first compensation one-way air inlet, and the outer wall of the second gas flow channel is provided with a second gas flow channel elastic sheet corresponding to the second compensation one-way air outlet.

[0019] Furthermore, the water absorbing member is a sponge made of polyurethane.

[0020] Furthermore, the auxiliary component is formed by two shells being threadedly connected, and the elastic member is located at the connection between the two shells.

[0021] Furthermore, the baffle located in the first gas flow channel is the first baffle, the baffle located in the second gas flow channel is the second baffle, and the distance between the first baffle and the central axis of the auxiliary component is longer than the distance between the second baffle and the central axis of the auxiliary component.

[0022] Furthermore, a mouthpiece is also included, and the mouthpiece is detachably connected to both ends of the auxiliary component, and the water absorbent is located between the connection between the mouthpiece and the auxiliary component.

[0023] Furthermore, there is a gap between the water absorbing member and the first gas flow channel and the second gas flow channel.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention is composed of an elastic member, an auxiliary component, a baffle, a water-absorbing member, a pressure sensor and a terminal. An oxygen connection port is provided on the side of the first gas flow channel, and oxygen is supplied to the first gas flow channel through the oxygen connection port. When the patient inhales through the second gas flow channel and then pulls the oscillation plate, the oxygen in the first gas flow channel enters the second gas flow channel along the patient's inhalation. The patient can inhale oxygen by inhaling through the first gas flow channel and the second gas flow channel. The second gas flow channel is suitable for patients who need to exercise their inspiratory muscles. When they inhale through the second gas flow channel, the inhalation pulls the oscillation plate to compress the resistance spring. The first gas flow channel is suitable for patients who need to exercise their expiratory muscles. When they exhale into the first gas flow channel, the exhalation pushes the oscillation plate to compress the resistance spring. The shock wave generated during the reciprocating movement of the oscillation plate enters the patient's airway to promote the removal of secretions. The water-absorbing member is used to maintain the temperature and humidity inside the auxiliary component.

[0026] 2. The first gas flow channel and the second gas flow channel can be connected to the opening of the tracheotomy tube or the endotracheal tube, which is suitable for respiratory muscle training of patients with tracheotomy or endotracheal tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the present invention.

[0028] Description of the accompanying drawings: 1-first gas flow channel; 100-auxiliary component; 2-second gas flow channel;

[0029] 3-resistance spring; 4-oscillation plate; 5-pressure sensor; 6-oxygen connection port;

[0030] 7-first compensating one-way air inlet; 8-second compensating one-way air outlet; 9-first gas flow channel elastic sheet;

[0031] 10-second gas flow channel elastic sheet; 11-water absorbing member; 12-wireless signal transmitter; 13-gap;

[0032] 14-mouthpiece; 15-first baffle; 16-second baffle. DETAILED DESCRIPTION

[0033] See also Figure 1 As shown, in order to make the technical solution clearer and more understandable, the present invention is further explained in combination with the specification and the drawings. The terminal referred to in this article has a data processing function, and this terminal is a single-chip microcomputer in the prior art, and the single-chip microcomputer can realize the data processing function. Therefore, the single-chip microcomputer model is no longer repeated.

[0034] The present invention relates to an intelligent respiratory rehabilitation device that can assist in expectoration, pronunciation and evaluation, and is characterized by:

[0035] An auxiliary component, with open structures at both ends, an elastic member is provided inside the auxiliary component to divide the auxiliary component into a first gas flow channel and a second gas flow channel, and baffles located in the first gas flow channel and the second gas flow channel are provided on the inner wall of the auxiliary component, and the baffles are arranged in two opposite directions, the two baffles located in the first gas flow channel extend in the direction of the central axis of the auxiliary component and are not connected to each other, and the two baffles located in the second gas flow channel extend in the direction of the central axis of the auxiliary component and are not connected to each other, and the elastic member is formed by connecting a resistance spring and an oscillation plate, one end of the resistance spring is connected to the baffle of the second gas flow channel, and the oscillation plate is against the baffle of the first gas flow channel;

[0036] The water absorbing member 11 is distributed in the first gas flow channel 1 and the second gas flow channel 2;

[0037] The pressure sensor 5 is distributed in the first gas flow channel 1 and the second gas flow channel 2 and on the oscillating plate 4;

[0038] The terminal is signal-connected to the pressure sensor 5 .

[0039] Among them, the surface of the auxiliary component 100 is provided with an oxygen connecting port 6 connected to the first gas flow channel 1, a first compensating one-way air inlet 7, and a second compensating one-way air outlet 8 connected to the second gas flow channel 2, the inner wall of the first gas flow channel 1 is provided with a first gas flow channel elastic sheet 9 corresponding to the oxygen connecting port 6 and the first compensating one-way air inlet 7, and the outer wall of the second gas flow channel 2 is provided with a second gas flow channel elastic sheet 10 corresponding to the second compensating one-way air outlet 8.

[0040] The specific usage principle is:

[0041] The first gas flow channel 1 and the second gas flow channel 2 are both used for breathing exercises and auxiliary expectoration, and the oxygen connection port 6 is suitable for auxiliary expectoration for patients who also suffer from hypoxemia.

[0042] It should be noted that one end of the first gas channel elastic sheet 9 is fixed on the inner wall of the first gas channel 1, and the other end of the first gas channel elastic sheet 9 is oblique to the central axis of the auxiliary component 100 along the direction of the oxygen connecting port 6 and the first compensation one-way air inlet 7.

[0043] One end of the second gas channel elastic sheet 10 is fixed on the outer wall of the second gas channel 2 , and the other end of the second gas channel elastic sheet 10 is obliquely directed to the outside of the auxiliary component 100 along the direction of the second compensation one-way gas outlet 8 .

[0044] The two ends of the auxiliary component 100 are respectively the first gas flow channel opening and the second gas flow channel opening. In the natural state, the oscillation plate 4 is offset against the baffle by the elastic force, so that the first gas flow channel 1 and the second gas flow channel 2 cannot exchange gas. The oxygen connection port 6 and the first compensation one-way air inlet 7 are disconnected from the external air by the action of the first gas flow channel elastic plate 9. During the alternating process of inhalation and exhalation, the first gas flow channel elastic plate 9 is affected by the air pressure to close or open the oxygen connection port 6 and the first compensation one-way air inlet 7, and cooperates with the elastic part to make the first gas flow channel 1 in a state between the patient's maximum inhalation negative pressure and atmospheric pressure. The maximum inhalation negative pressure of each patient depends on the individual situation. For this, the specific interval value is no longer repeated.

[0045] The specific steps are:

[0046] When exhaling from the opening of the first gas flow channel into the first gas flow channel 1, the oscillation plate 4 is in an oscillating state due to the action of air pressure. The shock wave generated by the oscillation plate 4 diffuses to the surroundings and enters the airway of the human body. The oscillation frequency of the shock wave causes the secretions in the airway to resonate and oscillate, thereby promoting the elimination of the secretions. Of course, the oscillation plate 4 is compressed by the air pressure to compress the resistance spring 3, so that the oscillation plate 4 is separated from the baffle, and the first gas flow channel 1 is connected to the second gas flow channel 2. The exhaled airflow passes through the second gas flow channel 2 and is discharged to the outside from the opening of the second gas flow channel.

[0047] It should be noted that the path of the exhaled gas is: first through the water absorbent 11 and then to the oscillation plate 4, and the exhaled gas is mixed with moisture, and the moisture has a certain temperature, then the water absorbent 11 absorbs the moisture, and in the subsequent inhalation process, the new air drives the moisture and heat on the water absorbent 11 to re-enter the human lungs, avoiding the phenomenon of sputum crust.

[0048] That is, when the patient inhales from the opening of the first gas flow channel, the elastic sheet 9 of the first gas flow channel is affected by the air pressure, the oxygen connection port 6 and the first compensation one-way air inlet 7 are opened, and oxygen and air are inhaled into the lungs; during the passage of the inhaled oxygen and air through the water absorbent 11, they are humidified and heated by the moisture and heat stored in the water absorbent 11, so that the gas inhaled into the lungs has a certain humidity and temperature; when exhaling, the temperature of the exhaled gas is 37° C. and the relative humidity is 100%. During the passage of the exhaled gas through the water absorbent 11, its moisture and heat are absorbed and stored in the water absorbent 11, which humidifies and heats the subsequently inhaled gas; when the exhaled gas reaches the first gas flow channel 1, a positive pressure is generated in the first gas flow channel 1, the first compensation one-way air inlet 7 and the oxygen connection port 6 are closed, and oxygen and air (or atomized gas) stop being provided to the first gas flow channel 1; the exhaled gas is discharged to the second gas flow channel 2 through the middle oscillating sheet 4.

[0049] When the pressure in the first gas flow channel 1 repeatedly exceeds the resistance of the resistance spring 3 due to continuous exhalation, the oscillation plate 4 generates an oscillation wave in phase with the exhalation in the first gas flow channel 1 under the repeated resetting of the resistance spring 3 .

[0050] When the second gas flow channel 2 is inhaled, the pressure in the second gas flow channel 2 decreases. When the pressure is low enough and can overcome the resistance of the resistance spring 3, the oscillation plate 4 pulls the resistance spring 3 to separate the oscillation plate 4 from the baffle, and the first gas flow channel 1 is connected to the second gas flow channel 2. The air pressure in the second gas flow channel 2 returns to normal pressure, and the oscillation plate 4 and the resistance spring 3 are reset. When the pressure in the second gas flow channel 2 repeatedly decreases due to continuous inhalation and can overcome the resistance of the oscillation plate 4 and the resistance spring 3, the oscillation plate 4 is repeatedly reset by the resistance spring 3 to make the second gas flow channel 2 An inhalation-phase shock wave is generated in the flow channel 2; the inhaled oxygen and air pass through the water absorbent 11, and are humidified and heated by the moisture and heat stored in the water absorbent 11, so that the gas inhaled into the lungs has a certain humidity and temperature; when exhaling, the temperature of the exhaled gas is 37°C and the relative humidity is 100%, and its moisture and heat are absorbed and stored in the water absorbent 11 of the second gas flow channel 2, which humidifies and heats the inhaled gas; after passing through the water absorbent 11 of the second gas flow channel 2, the exhaled gas is directly discharged through the second compensating one-way air outlet 8.

[0051] The pressure sensors 5 located on the first gas flow channel 1, the oscillation plate 4, and the second gas flow channel 2 simultaneously record the pressure changes at the three positions in real time, and real-time data analysis is performed through the terminal to form an inspiratory muscle force-time curve, an expiratory muscle force-time curve, and an airway oscillation frequency-time curve based on the three pressure sensors 5.

[0052] In this specific example, a wireless signal transmitter 12 matching the terminal is also provided. The signal detected by the pressure sensor 5 is transmitted to the terminal through the wireless signal transmitter 12. A corresponding APP or mobile software with similar functions can also be constructed based on the terminal. Through communication technology, remote monitoring management and rehabilitation guidance can be achieved. That is, by installing the corresponding application software on the mobile phone, the inspiratory muscle strength, expiratory muscle strength, lung function, and voice conditions automatically analyzed and diagnosed by the terminal can be observed, so as to guide the patient's further rehabilitation exercises.

[0053] Furthermore, the water absorbing member 11 is a sponge made of polyurethane.

[0054] Furthermore, the auxiliary component 100 is formed by two shells being threadedly connected, and the elastic member is located at the connection between the two shells; with the above scheme, when exhaling through the inlet and outlet of the first air flow channel, according to the maximum exhalation resistance that the patient can overcome, the resistance spring 3 is compressed or expanded by adjusting the relative rotation of the two shells, thereby achieving the purpose of exercising the expiratory muscles and the inspiratory muscles.

[0055] When the first gas flow channel 1 is connected to the patient's tracheotomy tube and the gas in the tracheotomy tube bag is removed, the patient has no upper airway obstruction, and the resistance of the resistance spring 3 is adjusted to at least 20 cmH2O, the gas exhaled by the patient is discharged to the trachea, larynx, pharynx, and mouth above the tracheotomy opening with low resistance. Since there is airflow passing through the vocal cords in the larynx, the patient can make sounds.

[0056] Furthermore, the baffle located in the first gas flow channel 1 is the first baffle 15 , the baffle located in the second gas flow channel 2 is the second baffle 16 , and the distance between the first baffle 15 and the central axis of the auxiliary component 100 is longer than the distance between the second baffle 16 and the central axis of the auxiliary component 100 .

[0057] Furthermore, a mouthpiece 14 is included, and the mouthpiece 14 is detachably connected to both ends of the auxiliary component 100. The water absorbent member 11 is located between the mouthpiece 14 and the auxiliary component 100 to avoid cross infection.

[0058] Furthermore, there is a gap 13 between the water absorbent 11 and the first gas flow channel 1 and the second gas flow channel 2. With the above scheme, when the water absorbent 11 is fully humidified and cannot be breathable, breathing can be carried out through the gap 13. The purpose of this design is to prevent suffocation. When the humidity of the water absorbent 11 decreases, its breathability is automatically restored.

[0059] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An intelligent respiratory rehabilitation device that can assist in expectoration, pronunciation and assessment, characterized in that: An auxiliary component, with open structures at both ends, an elastic member is provided inside the auxiliary component to divide the auxiliary component into a first gas flow channel and a second gas flow channel, and baffles located in the first gas flow channel and the second gas flow channel are provided on the inner wall of the auxiliary component, and the baffles are arranged in two opposite directions, the two baffles located in the first gas flow channel extend in the direction of the central axis of the auxiliary component and are not connected to each other, and the two baffles located in the second gas flow channel extend in the direction of the central axis of the auxiliary component and are not connected to each other, and the elastic member is formed by connecting a resistance spring and an oscillation plate, one end of the resistance spring is connected to the baffle of the second gas flow channel, and the oscillation plate is against the baffle of the first gas flow channel; The water absorbing member is distributed in the first gas flow channel and the second gas flow channel area; Pressure sensors are distributed in the first gas flow channel, the second gas flow channel and on the oscillating plate; A terminal, connected to the pressure sensor signal; Among them, the surface of the auxiliary component is provided with an oxygen connection port connected to the first gas flow channel, a first compensation one-way air inlet, and a second compensation one-way air outlet connected to the second gas flow channel, the inner wall of the first gas flow channel is provided with a first gas flow channel elastic sheet corresponding to the oxygen connection port and the first compensation one-way air inlet, and the outer wall of the second gas flow channel is provided with a second gas flow channel elastic sheet corresponding to the second compensation one-way air outlet.

2. According to claim 1, an intelligent respiratory rehabilitation device capable of assisting sputum discharge, pronunciation and assessment is characterized in that: The water absorbing member is a sponge made of inner polyurethane.

3. The intelligent respiratory rehabilitation device capable of assisting sputum discharge, pronunciation and assessment according to claim 1, characterized in that: The auxiliary component is formed by threaded connection of two shells, and the elastic member is located at the connection between the two shells.

4. The intelligent respiratory rehabilitation device capable of assisting sputum discharge, pronunciation and assessment according to claim 1, characterized in that: The baffle located in the first gas flow channel is the first baffle, the baffle located in the second gas flow channel is the second baffle, and the distance between the first baffle and the central axis of the auxiliary component is longer than the distance between the second baffle and the central axis of the auxiliary component.

5. The intelligent respiratory rehabilitation device capable of assisting sputum discharge, pronunciation and assessment according to claim 1, characterized in that: The invention also comprises a mouthpiece, wherein the mouthpiece is detachably connected to two ends of the auxiliary component, and the water absorbing member is located between the connection between the mouthpiece and the auxiliary component.

6. The intelligent respiratory rehabilitation device capable of assisting sputum discharge, pronunciation and assessment according to claim 1, characterized in that: There is a gap between the water absorbing member and the first gas flow channel and the second gas flow channel.

Citation Information

Patent Citations

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    CN203154726U

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