Respiratory training auxiliary device for critical medicine patient

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a critical medicine patient respiratory training auxiliary device which comprises a breathing mask and bandages, the surface of the breathing mask is provided with an expiration port and a plurality of inspiration ports, the bandages sleeve the two sides of the breathing mask, the expiration port is communicated with an air delivery pipe, and the breathing mask is communicated with a detection assembly through the air delivery pipe; a telescopic cavity is formed in the pipe wall of the air conveying pipe, a plurality of first springs are arranged in the telescopic cavity, the two ends of each first spring are fixedly connected with the two side walls of the telescopic cavity respectively, the surface of the breathing mask is covered with a bearing shell, and a telescopic air bag for achieving volume change according to the expiration strength of a patient is arranged on the edge of the breathing mask. A plurality of gas exchange assemblies are embedded in the surface of the bearing shell and communicate with the telescopic air bag. By designing the air delivery pipe which can be dynamically adjusted according to the expiration intensity of the patient, the negative influence of the resistance of the air delivery pipe on the breathing training of the patient is reduced, and the accuracy of detecting the expiration intensity of the patient is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a breathing training auxiliary device for critical care patients. Background Art

[0002] Given the long-term recovery process for patients with respiratory impairment, they often rely on a ventilator for oxygen support. While this measure can maintain vital signs, it can also lead to adverse consequences such as respiratory muscle paralysis, respiratory function decline, and a significant decrease in vital capacity. To effectively promote the gradual recovery of patients' respiratory function, it is particularly important to implement systematic breathing exercises. This is why breathing training assistive devices designed to specifically improve patients' vital capacity have emerged.

[0003] Traditional respiratory training assistance devices usually monitor and quantify the patient's breathing intensity through the visualization of gas exchange, and enhance the patient's breathing capacity in stages based on preset indicator thresholds. As the patient's breathing capacity gradually improves, these devices will correspondingly increase the respiratory index compliance standards in order to achieve gradual improvement in respiratory function. However, it is worth noting that most existing devices ignore the resistance effect of the diameter of the respiratory oxygen delivery pipeline (i.e., the airway) on the patient's breathing during design. Specifically, when the patient's breathing capacity improves and successfully reaches a higher visual indication standard (such as raising the visualization ball to a higher position), if the diameter of the airway is not adjusted in time, the patient will need to use more respiratory muscle strength to overcome the increased respiratory airflow resistance due to the diameter restriction. This phenomenon may not only conceal the patient's true recovery progress, but also mislead medical staff in their assessment of the patient's recovery status, and further affect the formulation and adjustment of subsequent respiratory training plans.

[0004] In view of this, a respiratory training assist device for critical care patients was designed. The air tube design can be dynamically adjusted according to the changes in the patient's respiratory ability, reducing the negative impact of improper air tube resistance on the patient's respiratory training, improving the accuracy of medical staff's assessment of the patient's recovery process, and providing strong technical support for the formulation of a more scientific and reasonable respiratory training plan. Summary of the Invention

[0005] To solve the above problems, the present invention provides a respiratory training assistance device for critical care patients. By designing an air tube that can be dynamically adjusted according to the patient's exhalation intensity, the negative impact of the air tube resistance on the patient's respiratory training is reduced, and the accuracy of detecting the patient's exhalation intensity is improved.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a breathing training auxiliary device for critical care patients, comprising a breathing mask and a strap, wherein the breathing mask is provided with an exhalation port and a plurality of inhalation ports, the straps are sleeved on both sides of the breathing mask, the exhalation port is connected to an air supply tube, and the breathing mask is connected to a detection component for visualizing the patient's tidal volume through the air supply tube;

[0007] A telescopic cavity is opened in the wall of the air supply pipe, and a plurality of first springs are arranged in the telescopic cavity. The two ends of the first springs are fixedly connected to the two side walls of the telescopic cavity respectively. The surface of the breathing mask is covered with a load-bearing shell, and the load-bearing shell is fixedly connected to the breathing mask. The edge of the breathing mask is provided with a telescopic airbag for realizing volume change according to the patient's exhalation intensity. The surface of the load-bearing shell is inlaid with a plurality of gas exchange components for assisting in adjusting the diameter of the air supply pipe, and the gas exchange components are all connected to the telescopic airbag.

[0008] The technical principles of the above scheme are as follows: gas exchange is achieved through the design of the exhalation port and the inhalation port. The separation design of the exhalation port and several inhalation ports allows patients to smoothly exchange gas during breathing training. The connection of the air supply tube and the detection component enables visualization of tidal volume. The air supply tube connected to the exhalation port guides the patient's exhalation and transmits it to the detection component. The detection component can measure and display the patient's tidal volume in real time, that is, the amount of gas inhaled or exhaled with each breath. The design of the telescopic cavity and the first spring enables dynamic adjustment of the diameter of the air supply tube. The telescopic cavity opened in the wall of the air supply tube and the first spring set inside constitute a dynamic adjustment mechanism. Auxiliary adjustment is achieved by connecting the telescopic airbag with the gas exchange component. The telescopic airbag set at the edge of the breathing mask can achieve volume changes according to the patient's exhalation intensity.

[0009] The above scheme has the following beneficial effects:

[0010] 1. This solution cleverly adapts to the exhalation intensity of different patients at different stages of rehabilitation by dynamically adjusting the diameter of the air tube. When the patient exhales, as the airflow pressure increases, the telescopic cavity in the air tube expands moderately under the action of the first spring, effectively reducing the resistance to airflow and avoiding patient discomfort caused by excessive resistance. This allows patients to experience a smooth breathing experience throughout the entire breathing training process, thereby greatly improving their comfort and reducing anxiety and resistance during training.

[0011] 2. This device's core advantage lies in its ability to dynamically adjust the diameter of the airway in real time based on the patient's exhalation intensity. This design ensures that the airway maintains optimal flow regardless of changes in the patient's exhalation intensity, accurately reflecting the patient's true exhalation status. This not only helps medical staff gain a more comprehensive understanding of the patient's respiratory function, but also provides strong data support for developing and adjusting personalized treatment plans.

[0012] 3. This device also excels in enhancing training outcomes. By maintaining a steady breathing rhythm and intensity, it guides patients to gradually establish a correct breathing pattern during breathing training. As training continues, the patient's respiratory muscles are gradually trained and strengthened, effectively improving respiratory function. Furthermore, the device's design fully considers the patient's psychological needs, providing a comfortable breathing experience that stimulates patient motivation and further enhances training outcomes. Under the guidance of medical staff, patients using this device for regular breathing training are expected to accelerate their recovery and return to a healthy life sooner.

[0013] Furthermore, a first one-way valve is fixedly connected to the air inlet, and the first one-way valve allows gas to flow from outside the breathing mask to inside the breathing mask.

[0014] Beneficial effects: The one-way valve ensures that gas can only enter the breathing mask in one direction, avoiding breathing difficulties caused by gas backflow and improving the patient's inhalation efficiency; in addition, the one-way flow of gas helps maintain the oxygen content in the breathing mask, reducing the risk of hypoxia in patients during breathing training and enhancing the safety of training.

[0015] Furthermore, the detection component includes a detection cylinder, in which a first partition is welded. The first partition divides the detection cylinder into a detection chamber and an air passage chamber from top to bottom. The side wall of the detection chamber is transparent. A first air hole is opened on the surface of the first partition. The detection chamber and the air passage chamber are connected through the first air hole. A detection piston is provided in the detection chamber. The detection piston slides with the inner wall of the detection chamber, and a scale corresponding to the position of the detection chamber is provided on the outer wall of the detection cylinder.

[0016] Beneficial effect: As the patient's exhaled gas flows in and out, the detection piston moves up and down in the detection chamber. Combined with the transparent side wall of the detection chamber and the outer wall of the detection tube marked with scales corresponding to the position of the detection chamber, by reading the scales, medical staff can accurately understand the patient's tidal volume, that is, the amount of gas in each breath.

[0017] Furthermore, a return spring is provided above the detection piston, and two ends of the return spring are fixedly connected to the inner top wall of the detection cavity and the top wall of the detection piston respectively.

[0018] Beneficial Effects: After each patient completes exhalation training, the return spring uses its own elastic force to push the detection piston back to its initial position, ready for the next test. This design simplifies the operation process and improves testing efficiency. The presence of the return spring ensures smoother movement of the detection piston, reducing errors caused by shaking, and helps improve the accuracy and reliability of the test.

[0019] Furthermore, an electromagnetic valve is fixedly connected in the first air hole, and the electromagnetic valve signal is connected to the controller.

[0020] Beneficial effects: Through the signal connection between the solenoid valve and the controller, fine control of gas circulation is achieved, allowing the device to dynamically adjust the opening degree of the first air hole according to different training needs or patient conditions, thereby regulating the gas flow entering the detection cavity; for example, in the training of strengthening the expiratory muscle group, the controller can gradually reduce the opening area of the solenoid valve, increase the expiratory resistance, and force the patient to use more expiratory muscle strength to complete the exhalation action, effectively improving the training effect, providing a highly flexible training mode, which can meet the personalized needs of different patients and promote targeted improvement of respiratory function.

[0021] Furthermore, the connection position between the gas supply pipe and the gas cavity is located on the side wall of the detection cylinder, and the side wall of the gas cavity away from the gas supply pipe is provided with a second one-way gas valve symmetrical to the gas supply pipe connection port. The second one-way gas valve allows gas from the outside of the detection cylinder to enter the gas cavity.

[0022] Beneficial Effects: When the patient completes an exhalation exercise and the detection piston returns to its original position under the action of the return spring, some of the gas below the detection piston will return to the air chamber through the first air hole and flow back into the breathing mask through the air supply tube. At this time, the opening of the second one-way air valve allows fresh air from the outside to quickly replenish the air chamber, accelerating the gas return process, simulating the state of lung inhalation, and helping to train the patient's inspiratory muscles. In addition, this design ensures that the return gas has sufficient oxygen content, reducing the risk of hypoxia during breathing training and improving the safety and comfort of training.

[0023] Furthermore, a plurality of second air holes are provided on the inner side wall of the telescopic airbag, and the telescopic airbag corresponds to the shape of the edge of the breathing mask.

[0024] Beneficial Effects: This design allows the expandable airbag to effectively expel excess air as the air pressure inside the mask increases. During exhalation training, the air pressure inside the mask rises with increasing exhalation intensity. At this point, air can smoothly enter the expandable airbag through the second air hole, preventing leaks or dislodging caused by excessive mask pressure. It also helps maintain the continuity and stability of breathing training, improving training effectiveness.

[0025] Furthermore, the telescopic airbag is an airbag with a foldable structure.

[0026] Beneficial effects: The foldable structure design allows the telescopic airbag to maintain a small volume when not in use, making it easy to carry and store the device. When needed, the telescopic airbag can be quickly deployed and its volume adjusted according to the changes in air pressure in the breathing mask. This not only improves the flexibility and adaptability of the telescopic airbag, but also ensures that the device can maintain good sealing and stability for different patients and different training stages.

[0027] Furthermore, the gas exchange component includes a sealing tube, and a second partition is provided in the sealing tube. The second partition is integrally formed with the sealing tube. The second partition divides the sealing tube into a negative pressure chamber and a positive pressure chamber from top to bottom. The positive pressure chamber and the negative pressure chamber are both provided with pneumatic pistons that can slide with the corresponding chamber side walls, and a connecting rod is provided between the two pneumatic pistons located in the same sealing tube. The connecting rods pass through the corresponding second partitions and their two ends are fixedly connected to the corresponding pneumatic pistons respectively. The pneumatic pistons divide the positive pressure chamber and the negative pressure chamber into a first chamber and a second chamber from top to bottom. The second chamber of the positive pressure chamber is connected to the telescopic airbag, and the second chamber of the negative pressure chamber is connected to the telescopic chamber.

[0028] Beneficial Effects: Through the synergistic effect of the positive and negative pressure chambers, and the linkage mechanism of the pneumatic piston and connecting rod, this design achieves more precise and flexible adjustment of the air tube diameter. This adjustment is not only dependent on the pressure of the patient's exhaled gas, but also influenced by the gas pressure within the telescopic airbag. This improves the adaptability and response speed of the entire respiratory training assist device, achieves the effect of dynamic adjustment of the auxiliary air tube diameter, enhances the stability of the dynamic adjustment design, and makes the entire device more reliable during use.

[0029] Furthermore, the first chambers of the positive pressure chamber and the negative pressure chamber are both communicated with the outside and are provided with a second spring, and both ends of the second spring are fixedly connected to the pneumatic piston and the inner wall of the first chamber respectively.

[0030] Beneficial Effects: When a patient performs exhalation training, as the exhaled gas increases, the pressure in the second chamber of the positive-pressure chamber increases, pushing the pneumatic piston toward the negative-pressure chamber. At this time, the pressure in the first chamber of the positive-pressure chamber, connected to the outside world, remains relatively stable, while the second spring acts as a buffer and stabilizes the movement of the pneumatic piston. As the intensity of exhalation decreases, the pressure in the second chamber of the positive-pressure chamber decreases, and the pneumatic piston, under the elastic force of the second spring, begins to reset, moving toward the positive-pressure chamber, preparing for the next exhalation training session.

[0031] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a respiratory training auxiliary device for critical care patients of the present invention;

[0033] Figure 2 This is an axonometric cross-sectional view of the detection tube in an embodiment of the respiratory training auxiliary device for critical care patients of the present invention;

[0034] Figure 3 This is an axonometric cross-sectional view of the air delivery tube in an embodiment of the respiratory training auxiliary device for critical care patients of the present invention;

[0035] Figure 4 This is a schematic diagram of the connection of the sealing tube in an embodiment of the respiratory training auxiliary device for critical care patients of the present invention;

[0036] Figure 5 This is an axonometric cross-sectional view of a sealing tube in an embodiment of the respiratory training auxiliary device for critical care patients of the present invention.

[0037] The figure marks in the drawings of the specification include: 1. breathing mask; 2. strap; 3. exhalation port; 4. inhalation port; 5. air supply pipe; 6. detection cylinder; 7. telescopic chamber; 8. first spring; 9. supporting shell; 10. telescopic air bag; 11. first one-way air valve; 12. first partition; 13. detection chamber; 14. air passage chamber; 15. first air hole; 16. detection piston; 17. scale; 18. reset spring; 19. solenoid valve; 20. second one-way air valve; 21. second air hole; 22. sealing tube; 23. second partition; 24. positive pressure chamber; 25. negative pressure chamber; 26. pneumatic piston; 27. connecting rod; 28. first chamber; 29. second chamber; 30. second spring. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] The following is further described in detail through specific implementation methods:

[0042] Example 1:

[0043] As attached Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The figure shows: a breathing training auxiliary device for critical care patients, comprising a breathing mask 1 and a strap 2, the straps 2 being sleeved on both sides of the breathing mask 1, and the patient fixes the breathing mask 1 to the mouth and nose through the straps 2 for breathing training; an exhalation port 3 and two inhalation ports 4 are opened on the surface of the breathing mask 1, and the two inhalation ports 4 are symmetrically located on both sides of the exhalation port 3, the exhalation port 3 is connected to an air supply pipe 5, and a first one-way air valve 11 is welded in the inhalation port 4, the breathing mask 1 is connected to a detection cylinder 6 for visualizing the patient's tidal volume through the air supply pipe 5, and the first one-way air valve 11 allows the gas to flow from the outside of the breathing mask 1 to the inside of the breathing mask 1, ensuring smooth and unobstructed inhalation of the patient; during use, the patient exhales into the exhalation port 3, and the gas is sent into the detection cylinder 6, and the patient's tidal volume (i.e., the amount of gas per breath) is monitored in real time through the detection cylinder 6. By observing the changes in tidal volume, medical staff can evaluate the patient's respiratory function and adjust the training intensity as needed.

[0044] like Figure 2As shown, a first partition 12 is welded inside the detection cylinder 6, and the first partition 12 divides the detection cylinder 6 into a detection chamber 13 and an air passage chamber 14 from top to bottom. The air passage chamber 14 is connected to the breathing mask 1 through the air supply pipe 5. A first air hole 15 is opened on the surface of the first partition 12, and the detection chamber 13 and the air passage chamber 14 are connected through the first air hole 15. An electromagnetic valve 19 is fixedly connected to the first air hole 15 by bolts, and the signal of the electromagnetic valve 19 is connected to the controller. A detection piston 16 is provided in the detection chamber 13, and the detection piston 16 slides with the inner wall of the detection chamber 13, and a scale 17 corresponding to the position of the detection chamber 13 is provided on the outer wall of the detection cylinder 6. When the patient exhales, the exhaled gas enters the air passage chamber 14 through the air supply pipe 5, and then enters the detection chamber 13 through the first air hole 15, increasing the gas volume at the bottom of the detection piston 16, thereby raising the detection piston 16, and medical staff can observe the patient's tidal volume through the scale 17. In addition, a reset spring 18 is provided above the detection piston 16, and the two ends of the reset spring 18 are fixedly connected to the inner top wall of the detection chamber 13 and the top wall of the detection piston 16 respectively, ensuring that the detection piston 16 can automatically reset to the initial position after completing an exhalation training, preparing for the next test, simplifying the operating process, improving the detection efficiency, and avoiding the risk of affecting the accuracy of the next test due to improper position of the detection piston 16.

[0045] It includes two training modes. In one, the same scale 17 height (tidal volume) is used as the patient's target for one exhalation. The solenoid valve 19 is controlled by the controller signal to reduce the flow area of the first air hole 15. The patient's expiratory muscles (such as abdominal muscles, intercostal muscles, etc.) need to overcome the resistance caused by the reduction in flow area before they can discharge the gas into the detection cavity 13, so as to strengthen the strength and endurance of the expiratory muscles and improve the patient's respiratory function.

[0046] Secondly, the flow area of the first air hole 15 is maintained and the scale 17 of the target exhaled volume is increased, that is, the patient needs to exhale more gas in one breath to reach the target scale 17, exercise the patient's lung muscles to increase the patient's vital capacity, and combine the two exercise modes to strengthen the respiratory muscles while exercising and enhancing the patient's vital capacity, more effectively assisting the patient in breathing training and improving the efficiency of respiratory recovery.

[0047] The special thing is that, no matter the training mode that increases the expiratory resistance or the training mode that increases the target tidal volume, the increased expiratory pressure and gas flow will be affected by the resistance of the air tube 5 with a constant diameter. For this reason, a telescopic cavity 7 is designed to be opened in the wall of the air tube 5, and a plurality of first springs 8 are arranged in the telescopic cavity 7. The two ends of the first spring 8 are respectively welded to the two side walls of the telescopic cavity 7. When the patient's expiratory muscle group exerts more strength, that is, the air pressure in the breathing mask 1 increases during a certain exhalation process of the patient, the flow of the exhaled gas entering the air tube 5 increases, and the air pressure in the air tube 5 also increases accordingly. The inner wall of the air tube 5 will be subjected to outward pressure, and the first spring 8 is subjected to pressure toward the outside of the air tube 7, thereby compressing the volume of the telescopic cavity 7, thereby achieving the effect of expanding the diameter of the air tube 5, that is, the air tube 5 dynamically adjusts the diameter according to the patient's exhalation intensity. Compared with the air tube 5 with a fixed diameter, the influence of the resistance of the air tube 5 on the patient's exhalation volume detection is reduced, and the accuracy of the detection tube 6 in detecting the patient's exhalation intensity is improved.

[0048] In addition, as the amount of exhaled gas increases, the amount of exhaled gas that can pass through the air supply pipe 5 is always limited, and some of the excess gas will be retained in the breathing mask 1, increasing the air pressure of the breathing mask 1, causing the breathing mask 1 to have a trend of increasing in volume. Taking advantage of this trend, the surface of the breathing mask 1 is designed to be covered with a supporting shell 9, and the supporting shell 9 is fixedly connected to the breathing mask 1 through a snap-fit structure. The edge of the breathing mask 1 is provided with a telescopic airbag 10 with a folding structure, and the inner side wall of the telescopic airbag 10 is provided with a plurality of second air holes 21, and the telescopic airbag 10 corresponds to the shape of the edge of the breathing mask 1. The surface of the carrying shell 9 is inlaid with a plurality of sealing tubes 22 for assisting in adjusting the diameter of the gas pipe 5. The sealing tubes 22 are all connected to the telescopic airbag 10. When gas accumulates in the breathing mask 1, the gas that cannot enter the gas pipe 5 enters the telescopic airbag 10 through the plurality of second air holes 21, thereby increasing the volume of the telescopic airbag 10. On the one hand, it is helpful to alleviate the trend of increasing the volume of the breathing mask 1 and reduce the risk of leakage or falling off of the breathing mask 1. On the other hand, the excess gas entering the telescopic airbag 10 enters the plurality of sealing tubes 22 to assist in adjusting the diameter of the gas pipe 5.

[0049] For auxiliary regulation of the gas pipe 5, specifically Figure 5As shown, a second partition 23 is provided in the sealing tube 22, and the second partition 23 is integrally formed with the sealing tube 22. The second partition 23 divides the sealing tube 22 into a negative pressure chamber 25 and a positive pressure chamber 24 from top to bottom. A pneumatic piston 26 that can slide with the corresponding chamber side wall is provided in the positive pressure chamber 24 and the negative pressure chamber 25, and a connecting rod 27 is provided between the two pneumatic pistons 26 located in the same sealing tube 22. The connecting rod 27 passes through the corresponding second partition 23 and its two ends are respectively welded to the corresponding pneumatic piston 26, and the connecting rod 27 is connected to the A sealing ring is provided at the contact point of the second partition 23 to avoid leakage when gas is exchanged between the chambers; the pneumatic piston 26 divides the positive pressure chamber 24 and the negative pressure chamber 25 into a first chamber 28 and a second chamber 29 from top to bottom, the second chamber 29 of the positive pressure chamber 24 is connected to the telescopic airbag 10, the second chamber 29 of the negative pressure chamber 25 is connected to the telescopic chamber 7, the first chamber 28 of the positive pressure chamber 24 and the negative pressure chamber 25 are connected to the outside world and are provided with a second spring 30, both ends of the second spring 30 are connected to the pneumatic piston 26 The inner wall of the first chamber 28 is welded to the inner wall of the first chamber 28. Taking one of the sealing tubes 22 as an example, when the gas transmitted from the telescopic airbag 10 enters the second chamber 29 of the positive pressure chamber 24, the volume of the second chamber 29 of the positive pressure chamber 24 increases, and the pneumatic piston 26 in the positive pressure chamber 24 moves toward the direction close to the negative pressure chamber 25. At this time, the connecting rod 27 transmits the displacement to the pneumatic piston 26 in the negative pressure chamber 25, so that the volume of the second chamber 29 in the negative pressure chamber 25 is passively increased, thereby generating negative pressure to absorb the gas in the telescopic chamber 7 connected thereto, thereby achieving the telescopic effect. The volume of the shrinkage chamber 7, that is, the adjustment of the diameter of the air supply tube 5 is increased, which enhances the flexibility of dynamic adjustment of the diameter of the air supply tube 5 compared with the adjustment only by the air pressure of the patient's exhaled gas; and the design of the second spring 30, when the patient performs exhalation training, the second spring 30 plays a role in buffering and stabilizing the movement of the pneumatic piston 26; when the exhalation intensity weakens, the pressure in the second chamber 29 of the positive pressure chamber 24 decreases, and the pneumatic piston 26 begins to reset under the elastic force of the second spring 30, moving toward the positive pressure chamber 24, and preparing for the next exhalation training.

[0050] Example 2:

[0051] As attached Figure 2As shown, the difference from Example 1 is that the connection position between the air supply pipe 5 and the air passage cavity 14 is located on the side wall of the detection cylinder 6, and the side wall of the air passage cavity 14 away from the air supply pipe 5 is provided with a second one-way air valve 20 symmetrical to the connection port of the air supply pipe 5. The second one-way air valve 20 allows gas from the outside of the detection cylinder 6 to enter the air passage cavity 14, that is, when the patient finishes an exhalation training, the detection piston 16 is returning to its position, and the gas below the detection piston 16 returns to the air passage cavity 14 through the first air hole 15, and flows back into the breathing mask 1 through the air supply pipe 5. The flow of the reflux gas will accelerate the flow rate of the external fresh air entering the air supply pipe 5 from the second one-way air valve 20. On the one hand, the increase in the flow rate of the reflux gas entrained with fresh air can simulate the state of the patient's lung inhalation and assist in exercising the patient's inspiratory muscle groups. On the other hand, the flow rate of the reflux gas is used to accelerate the entry of fresh gas, so that the gas that finally flows back to the breathing mask 1 maintains sufficient oxygen content, reducing the risk of hypoxia during the patient's breathing training process and improving the safety of the training.

[0052] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A breathing training auxiliary device for critical care patients, comprising a breathing mask (1) and a strap (2), wherein the breathing mask (1) is provided with an exhalation port (3) and a plurality of inhalation ports (4), and the strap (2) is sleeved on both sides of the breathing mask (1), characterized in that: The exhalation port (3) is connected to an air supply pipe (5), and the breathing mask (1) is connected to a detection component for visualizing the patient's tidal volume through the air supply pipe (5); A telescopic cavity (7) is provided in the wall of the air delivery pipe (5), a plurality of first springs (8) are provided in the telescopic cavity (7), and the two ends of the first springs (8) are fixedly connected to the two side walls of the telescopic cavity (7), respectively. The surface of the breathing mask (1) is covered with a bearing shell (9), and the bearing shell (9) is fixedly connected to the breathing mask (1). The edge of the breathing mask (1) is provided with a telescopic air bag (10) for achieving volume change according to the patient's exhalation intensity. The surface of the bearing shell (9) is inlaid with a plurality of gas exchange components for assisting in adjusting the diameter of the air delivery pipe (5), and the gas exchange components are all connected to the telescopic air bag (10).

2. The respiratory training assist device for critical care patients according to claim 1, characterized in that: A first one-way air valve (11) is fixedly connected to each of the air inlets (4), and the first one-way air valve (11) allows air to flow from outside the breathing mask (1) to inside the breathing mask (1).

3. The respiratory training assist device for critical care patients according to claim 2, characterized in that: The detection assembly includes a detection cylinder (6), a first partition (12) is welded inside the detection cylinder (6), and the first partition (12) divides the detection cylinder (6) into a detection chamber (13) and an air passage chamber (14) from top to bottom. The side wall of the detection chamber (13) is transparent, and a first air hole (15) is opened on the surface of the first partition (12). The detection chamber (13) and the air passage chamber (14) are connected through the first air hole (15). A detection piston (16) is provided in the detection chamber (13), and the detection piston (16) is slidably matched with the inner wall of the detection chamber (13). The outer wall of the detection cylinder (6) is provided with a scale (17) corresponding to the position of the detection chamber (13).

4. The respiratory training assist device for critical care patients according to claim 3, characterized in that: A reset spring (18) is provided above the detection piston (16), and two ends of the reset spring (18) are fixedly connected to the inner top wall of the detection cavity (13) and the top wall of the detection piston (16) respectively.

5. The respiratory training assist device for critical care patients according to claim 4, characterized in that: An electromagnetic valve (19) is fixedly connected in the first air hole (15), and the electromagnetic valve (19) is signal-connected to a controller.

6. The respiratory training assist device for critical care patients according to claim 5, characterized in that: The communication position between the gas supply pipe (5) and the gas passage cavity (14) is located on the side wall of the detection cylinder (6), and a second one-way gas valve (20) symmetrical to the communication port of the gas supply pipe (5) is provided on the side wall of the gas passage cavity (14) away from the gas supply pipe (5). The second one-way gas valve (20) allows gas from the outside of the detection cylinder (6) to enter the gas passage cavity (14).

7. The respiratory training assist device for critical care patients according to claim 6, characterized in that: The inner side wall of the telescopic airbag (10) is provided with a plurality of second air holes (21), and the telescopic airbag (10) corresponds to the shape of the edge of the breathing mask (1).

8. The respiratory training assist device for critical care patients according to claim 7, characterized in that: The telescopic airbag (10) is an airbag with a foldable structure.

9. The respiratory training assist device for critical care patients according to claim 8, characterized in that: The gas exchange assembly includes a sealing tube (22), a second partition (23) is provided in each sealing tube (22), the second partition (23) is integrally formed with the sealing tube (22), and the second partition (23) divides the sealing tube (22) into a negative pressure chamber (25) and a positive pressure chamber (24) from top to bottom. The positive pressure chamber (24) and the negative pressure chamber (25) are both provided with a pneumatic piston (26) that slides with the corresponding chamber side wall, and the two pneumatic pistons (26) are located in the same sealing tube (22). A connecting rod (27) is provided between the two connecting rods. The connecting rods (27) pass through the corresponding second partitions (23) and the two ends thereof are fixedly connected to the corresponding pneumatic pistons (26). The pneumatic pistons (26) divide the positive pressure chamber (24) and the negative pressure chamber (25) into a first chamber (28) and a second chamber (29) from top to bottom. The second chamber (29) of the positive pressure chamber (24) is connected to the telescopic airbag (10), and the second chamber (29) of the negative pressure chamber (25) is connected to the telescopic chamber (7).

10. The respiratory training assist device for critical care patients according to claim 9, characterized in that: The first chambers (28) of the positive pressure chamber (24) and the negative pressure chamber (25) are both communicated with the outside and are provided with a second spring (30). Both ends of the second spring (30) are fixedly connected to the pneumatic piston (26) and the inner wall of the first chamber (28) respectively.

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