Breathing resistance adjustable type end-tidal carbon dioxide monitoring nasal mask

Abstract

The invention relates to the technical field of medical instruments, and discloses an adjustable respiratory resistance type end-expiratory carbon dioxide monitoring nasal mask which comprises a nasal mask body, an end-expiratory carbon dioxide collecting tube, an oxygen conveying hose and a connector assembly arranged at one end of the nasal mask body and used for connecting the end-expiratory carbon dioxide collecting tube and the oxygen conveying hose. The connector assembly comprises a double-channel connector connected with the nasal mask body, a partition plate is fixedly connected to the inner wall of the double-channel connector, and when the inspiration resistance is adjusted through the arranged inspiration adjusting mechanism and expiration adjusting mechanism, the hand wheel assembly is manually operated to control the blocking film assembly, so that the caliber size of the oxygen delivery port is changed, and the oxygen delivery effect is improved. The larger the diameter of the oxygen delivery port is, the smaller the inspiration resistance is, when the expiration resistance is adjusted, the reel assembly is manually operated, so that the total gas displacement of the exhaust hole in the exhaust buckle is changed, the larger the total gas displacement of the exhaust hole is, the smaller the expiration resistance is, and therefore the effect of improving the treatment accuracy is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an adjustable respiratory resistance type end-tidal carbon dioxide monitoring nasal mask. Background Art

[0002] The end-tidal carbon dioxide monitoring nasal mask is a medical device used to monitor the patient's end-tidal carbon dioxide concentration in real time. It is widely used in anesthesia, intensive care, emergency and respiratory therapy. By integrating high-precision sensors, the device can continuously monitor the patient's respiratory status, evaluate ventilation function and carbon dioxide discharge efficiency, and provide key data for clinical diagnosis and treatment. Its design is lightweight and comfortable to wear. It is suitable for a variety of medical scenarios, helps to detect respiratory dysfunction in a timely manner, improves patient safety and treatment effects, and is an important tool for modern respiratory management.

[0003] The patent publication number CN221618259U discloses an oxygen mask with an end-tidal carbon dioxide detection function, including a mask body and an end-tidal carbon dioxide detection tube. The mask body has a receiving groove, the receiving groove is used to accommodate the patient's nose, the receiving groove is connected to the oxygen source, and the end-tidal carbon dioxide detection tube has a proximal end and a distal end opposite to each other, the proximal end is arranged in the receiving groove, the distal end passes through the oxygen mask, and is arranged outside the receiving groove for connection with a monitor. The utility model can monitor the end-tidal carbon dioxide level in real time when the patient uses the oxygen mask by arranging the end-tidal carbon dioxide detection tube in the mask body to prevent the patient from having carbon dioxide retention; and since there is no need to insert an additional trachea between the mask body and the patient's face, the sealing performance of the oxygen mask will not be reduced, and therefore the oxygen supply effect of the oxygen mask to the patient will not be affected.

[0004] The prior art has the following defects: Unable to adjust breathing resistance: Existing end-tidal carbon dioxide monitoring nasal masks are usually designed with fixed breathing resistance and cannot be adjusted according to the actual needs of the user. This fixed design may cause users to have difficulty breathing or inefficient oxygen utilization in some cases. For example, patients with chronic obstructive pulmonary disease (COPD) and sleep apnea will have changes in breathing frequency and depth. Fixed breathing resistance cannot meet these changes, thus affecting the use effect and comfort. Therefore, it is necessary to set up a structure with adjustable breathing resistance function so that medical staff can flexibly adjust the breathing resistance according to the needs of patients, thereby more realistically simulating different breathing conditions and improving the accuracy of respiratory function assessment and treatment.

[0005] Unable to cope with the supply and exhaust of mouth-inhalation in emergency situations: In emergency situations, patients will switch to mouth-inhalation due to breathing difficulties or impaired consciousness, that is, breathing through the mouth instead of normal nasal inhalation. Mouth-inhalation goes directly through the mouth, with faster airflow, larger ventilation volume, and more carbon dioxide when exhausting. Therefore, it is necessary to adjust the breathing resistance to the minimum in time, that is, to maximize the airflow flow diameter. Therefore, it is necessary to set a structure to adjust the maximum airflow flow diameter to ensure the patient's breathing safety in emergency situations, so as to improve the rescue effect and safety in emergency situations. Summary of the invention

[0006] In view of the fact that the existing technology cannot adjust the breathing resistance and cannot cope with the supply and exhaust of air in the mouth-inhalation state in an emergency, a nasal mask with adjustable breathing resistance and end-tidal carbon dioxide monitoring is proposed.

[0007] The present application provides an adjustable respiratory resistance type end-tidal carbon dioxide monitoring nasal mask, the purpose of which is: through the provision of an inhalation adjustment mechanism and an exhalation adjustment mechanism, medical staff can flexibly adjust the respiratory resistance according to the needs of the patient, thereby more realistically simulating different breathing conditions, thereby achieving the effect of improving the accuracy of respiratory function assessment and treatment, while also ensuring the patient's breathing safety in emergency situations, thereby achieving the effect of improving the rescue effect and safety in emergency situations.

[0008] The technical solution of the present invention is: an adjustable breathing resistance type end-tidal carbon dioxide monitoring nasal mask, comprising a nasal mask body, an end-tidal carbon dioxide collection tube, an oxygen supply hose, and a joint assembly arranged at one end of the nasal mask body for connecting the end-tidal carbon dioxide collection tube and the oxygen supply hose, the joint assembly comprising a double-channel joint connected to the nasal mask body, the inner wall of the double-channel joint is fixedly connected with a partition plate, the interior of the double-channel joint is divided into an end-tidal port and an oxygen supply port by the partition plate, the end-tidal port is connected to the end-tidal carbon dioxide collection tube, the oxygen supply port is connected to the oxygen supply hose, and the oxygen supply port is provided with an inhalation regulating mechanism; The inhalation adjustment mechanism includes a handwheel assembly for manual adjustment, a limit groove opened inside the dual-channel joint, a flexible sealing strip installed between the limit groove and the oxygen supply port, and a film-blocking assembly for adjusting the size of the oxygen supply port. The handwheel assembly is arranged on the outside of the dual-channel joint, and the film-blocking assembly is arranged on the inside of the oxygen supply port.

[0009] By adopting the above scheme, through the inhalation adjustment mechanism, when inhaling through the nose, the handwheel assembly is manually operated to control the membrane resistance assembly, thereby changing the diameter of the oxygen supply port. The larger the diameter of the oxygen supply port, the smaller the inhalation resistance. When inhaling through the mouth, the greater suction force will adsorb the membrane resistance assembly inward, so that the diameter of the oxygen supply port is in the maximum state, thereby ensuring the patient's breathing safety in emergency situations, and achieving the effect of improving the rescue effect and safety in emergency situations.

[0010] Furthermore, the barrier film assembly includes a movable shaft rotatably connected to the bottom of the partition plate, the bottom of the movable shaft is fixedly connected to a barrier film outer frame, the interior of the barrier film outer frame is slidably connected to a folded barrier film, and the outer wall of the barrier film outer frame is fixedly connected to a guide column.

[0011] Furthermore, the middle section of the guide column is fixedly connected to a middle stopper, a slider is slidably connected to the inside of the guide column, a return spring is installed between the slider and the middle stopper, the slider is fixedly connected to the bottom of the folding resistance film, a connecting wire is arranged inside the guide column, and one end of the connecting wire passes through the return spring and is fixedly connected to the slider.

[0012] By adopting the above scheme, when adjusting the inhalation resistance through the provided resistance film assembly, the handwheel assembly is manually operated to pull the connecting wire to slide in the guide column, and the connecting wire pulls the slider to slide in the guide column and squeezes the reset spring, and the slider drives the folding resistance film to fold in the resistance film outer frame, thereby changing the diameter of the oxygen supply port. The larger the diameter of the oxygen supply port, the smaller the inhalation resistance, which plays a role in adjusting the diameter of the oxygen supply port.

[0013] Furthermore, the handwheel assembly includes a supporting wheel fixedly connected to the guide column, the outer wall of the supporting wheel is rotatably connected to an adjustment pointer, the other end of the connecting wire is fixedly connected to the fingertip of the adjusting pointer by penetrating the supporting wheel, an adjustment groove is opened inside the supporting wheel, and the fingertip of the adjusting pointer moves in an arc shape along the adjustment groove.

[0014] Furthermore, a hollow connecting tube is fixedly connected to the outer wall of the adjusting pointer, and an adjusting hand wheel is fixedly connected to one end of the hollow connecting tube away from the adjusting pointer, and the adjusting hand wheel is used to drive the rotation of the adjusting pointer.

[0015] By adopting the above scheme, when adjusting the inhalation resistance through the handwheel assembly, the adjusting handwheel is manually operated, and the adjusting handwheel drives the adjusting pointer on the supporting wheel to move in an arc along the adjusting groove through the hollow connecting tube, thereby pulling the connecting wire to slide in the guide column, and the caregiver can assist in controlling the inhalation to the maximum control amount by bending the guide column, thereby playing a role of control and adjustment.

[0016] Furthermore, an end-of-exhalation collection component is provided inside the end-of-exhalation port, and the end-of-exhalation collection component includes a fixed plate fixedly connected to the inner wall of the end-of-exhalation port, the inner wall of the fixed plate is rotatably connected to a swing shaft, the outer wall of the swing shaft is fixedly connected to a swing membrane, the swing membrane is provided inside the fixed plate, and the inner wall of the fixed plate is fixedly connected to a plurality of evenly distributed limit blocks, and the plurality of limit blocks are used to limit the swing direction of the swing membrane.

[0017] By adopting the above scheme, through the end-tidal carbon dioxide collection component that is set up, when the patient exhales, the exhaled gas is first sprayed toward the end-tidal carbon dioxide collection component, and the gas blows the swinging membrane to swing at the swinging axis in the fixed plate, and part of the exhaled gas enters the end-tidal carbon dioxide collection tube through the end-tidal port to be collected. Due to the presence of the swinging membrane, it can be prevented that air enters the end-tidal carbon dioxide collection tube during inhalation and causes the sampling sample to deviate, thereby playing the role of extracting part of the end-tidal carbon dioxide into the end-tidal carbon dioxide collection tube for collection.

[0018] Furthermore, two exhalation regulating mechanisms are symmetrically arranged inside the mask body, and the exhalation regulating mechanism includes a flip shaft rotatably connected to the inside of the mask body, an exhaust buckle is fixedly connected to the outer wall of the flip shaft, a plurality of exhaust holes are provided on a side of the exhaust buckle close to the mask body, and a reel assembly is provided on a side of the exhaust buckle away from the mask body.

[0019] Furthermore, the reel assembly includes a rotating shaft rotatably connected to the inside of the exhaust buckle, the end of the rotating shaft away from the exhaust buckle is fixedly connected to a reel handwheel, the outer wall of the rotating shaft is fixedly connected to two axially symmetrically arranged reel films, the inside of the exhaust buckle is fixedly connected to two telescopic springs, and the ends of the two telescopic springs close to the rotating shaft are respectively fixedly connected to the two reel films.

[0020] Furthermore, the inner wall of the nose mask body is fixedly connected with two symmetrically arranged limit stops, and the two limit stops are respectively used to limit the rotation range of the two exhaust buckles.

[0021] By adopting the above scheme, when adjusting the exhalation resistance through the exhalation adjustment mechanism, the reel handwheel is manually operated, and the reel handwheel drives the rotating shaft to rotate in the exhaust buckle. While the rotating shaft rotates, the reel films on both sides are pulled to roll toward the rotating shaft, thereby changing the total exhaust volume of the exhaust holes on the exhaust buckle. The larger the total exhaust volume of the exhaust holes, the smaller the exhalation resistance. When inhaling through the mouth, the larger wind force blown out will blow the reel film, so that the exhaust buckle reaches a state perpendicular to the nasal mask body at the flip axis, so that the exhaust volume reaches the maximum state, and the caregiver can bend the rotating shaft to assist in controlling the exhaust to be at the maximum control volume. At this point, the patient's breathing safety in emergency situations is ensured, and the effect of improving the rescue effect and safety in emergency situations is achieved.

[0022] Beneficial effects of the present invention: 1. Through the inhalation adjustment mechanism and the exhalation adjustment mechanism, when the inhalation resistance is adjusted, the handwheel assembly is manually operated to control the resistance membrane assembly, thereby changing the diameter of the oxygen supply port. The larger the diameter of the oxygen supply port, the smaller the inhalation resistance. When adjusting the exhalation resistance, the scroll assembly is manually operated to change the total exhaust volume of the exhaust hole on the exhaust buckle. The larger the total exhaust volume of the exhaust hole, the smaller the exhalation resistance. This enables medical staff to flexibly adjust the respiratory resistance according to the needs of patients, thereby more realistically simulating different breathing conditions and achieving the effect of improving the accuracy of respiratory function assessment and treatment.

[0023] 2. Through the inhalation adjustment mechanism and the exhalation adjustment mechanism, when encountering an emergency, the patient will switch to mouth inhalation due to breathing difficulties or impaired consciousness. The mouth inhalation airflow is faster, the ventilation volume is larger, and more carbon dioxide is discharged during exhaust. Therefore, it is necessary to adjust the breathing resistance to the minimum in time, that is, the airflow flow diameter is maximized. Therefore, the greater suction force will adsorb the folded resistance film inward, so that the outer frame of the resistance film is close to the partition plate at the movable axis, so that the diameter of the oxygen supply port is in the maximum state. At the same time, the greater wind force blown out will blow the scroll film, so that the exhaust buckle is perpendicular to the nasal mask body at the flip axis, so that the exhaust volume reaches the maximum state, and the caregiver can assist in controlling the inhalation and exhaust at the maximum control amount by turning the guide column and the rotating shaft. At this point, the patient's breathing safety in an emergency is ensured, and the effect of improving the rescue effect and safety in an emergency is achieved.

[0024] 3. Through the end-tidal carbon dioxide collection component that is set up, when the patient exhales, the exhaled gas is first sprayed toward the end-tidal carbon dioxide collection component, and the gas blows the swinging membrane to swing at the swinging axis in the fixed plate, and part of the exhaled gas enters the end-tidal carbon dioxide collection tube through the end-tidal port and is collected. Due to the presence of the swinging membrane, it can prevent air from entering the end-tidal carbon dioxide collection tube during inhalation to cause deviation in the sampling sample, thereby playing a role in extracting part of the end-tidal carbon dioxide into the end-tidal carbon dioxide collection tube for collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the nasal mask body of the present invention; Figure 2 It is a front view of the overall structure of the nasal mask body of the present invention; Figure 3 It is a structural schematic diagram of the joint assembly of the present invention; Figure 4 It is a structural schematic diagram of the air intake regulating mechanism of the present invention; Figure 5 It is a structural schematic diagram of the barrier film assembly of the present invention; Figure 6 It is a structural schematic diagram of the return spring of the present invention; Figure 7 It is a structural schematic diagram of the hand wheel assembly of the present invention; Figure 8 It is a structural schematic diagram of the adjusting hand wheel of the present invention; Fig. 9 It is a schematic diagram of different adjustment states of the folding barrier film of the present invention; Fig.10 It is a structural schematic diagram of the end-of-exhalation collection component of the present invention; Fig.11 It is a schematic diagram of different swinging states of the swinging membrane of the present invention; Fig.12 It is a structural schematic diagram of the exhalation regulating mechanism of the present invention; Fig.13 It is a structural schematic diagram of the reel assembly of the present invention.

[0026] In the figure: 1. Nasal mask body; 2. Connector assembly; 21. Dual-channel connector; 22. Partition plate; 23. End-tidal port; 24. Oxygen supply port; 3. End-tidal carbon dioxide collection tube; 4. Oxygen supply hose; 5. Inhalation adjustment mechanism; 51. Handwheel assembly; 511. Support wheel; 512. Adjustment pointer; 513. Adjustment slot; 514. Hollow connecting tube; 515. Adjustment handwheel; 52. Limiting slot; 53. Flexible sealing strip; 54. Blocking film assembly; 541. Movable shaft; 542. Blocking film Outer frame; 543, folding resistance film; 544, slider; 545, connecting wire; 546, reset spring; 547, guide column; 548, middle block; 6, end-of-exhalation collection component; 61, fixed plate; 62, swing membrane; 63, swing shaft; 64, limit block; 7, exhalation adjustment mechanism; 71, exhaust buckle; 72, limit stop frame; 73, flip shaft; 74, reel assembly; 741, reel handwheel; 742, rotating shaft; 743, reel membrane; 744, telescopic spring. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Reference Figure 1 - Fig.13, provides an adjustable respiratory resistance type end-tidal carbon dioxide monitoring nasal mask, including a nasal mask body 1, an end-tidal carbon dioxide collection tube 3, an oxygen supply hose 4, and a joint assembly 2 arranged at one end of the nasal mask body 1 for connecting the end-tidal carbon dioxide collection tube 3 and the oxygen supply hose 4, the joint assembly 2 includes a double-channel joint 21 connected to the nasal mask body 1, the inner wall of the double-channel joint 21 is fixedly connected with a partition plate 22, the interior of the double-channel joint 21 is divided into an end-tidal port 23 and an oxygen supply port 24 by the partition plate 22, the end-tidal port 23 is connected to the end-tidal carbon dioxide collection tube 3, the oxygen supply port 24 is connected to the oxygen supply hose 4, and the interior of the oxygen supply port 24 is provided with an inhalation adjustment mechanism 5.

[0029] Reference Figure 3 - Figure 4 The inhalation adjustment mechanism 5 includes a handwheel assembly 51 for manual adjustment, a limiting groove 52 opened inside the dual-channel joint 21, a flexible sealing strip 53 installed between the limiting groove 52 and the oxygen supply port 24, and a film-blocking assembly 54 for adjusting the size of the oxygen supply port 24. The handwheel assembly 51 is arranged outside the dual-channel joint 21, and the film-blocking assembly 54 is arranged inside the oxygen supply port 24.

[0030] Specifically, the handwheel assembly 51 is lighter than the film-blocking assembly 54. In the case of nasal inhalation, the film-blocking assembly 54 and the handwheel assembly 51 maintain an initial state. In the case of oral inhalation, the handwheel assembly 51 is pressed down and the film-blocking assembly 54 is tilted. The handwheel assembly 51 can be restricted at the limiting groove 52 to prevent the film-blocking assembly 54 from resetting. The flexible sealing strip 53 can seal the limiting groove 52 to prevent oxygen-containing air from leaking out. At the same time, any position of the flexible sealing strip 53 can pass through the film-blocking assembly 54 and seal the opening on the path.

[0031] Through the inhalation adjustment mechanism 5, when inhaling through the nose, the handwheel assembly 51 is manually operated to control the membrane resistance assembly 54, thereby changing the diameter of the oxygen supply port 24. The larger the diameter of the oxygen supply port 24, the smaller the inhalation resistance. When inhaling through the mouth, a larger suction force will adsorb the membrane resistance assembly 54 inward, so that the diameter of the oxygen supply port 24 is in the maximum state. In this way, the patient's breathing safety in emergency situations is ensured, and the effect of improving the rescue effect and safety in emergency situations is achieved.

[0032] Reference Figure 5 - Figure 8The film-blocking assembly 54 includes a movable shaft 541 rotatably connected to the bottom of the partition plate 22, a film-blocking outer frame 542 is fixedly connected to the bottom of the movable shaft 541, a folded film-blocking outer frame 542 is slidably connected to the inside of the film-blocking outer frame 542, a guide column 547 is fixedly connected to the outer wall of the film-blocking outer frame 542, a middle block 548 is fixedly connected to the middle section of the guide column 547, a slider 544 is slidably connected to the inside of the guide column 547, a return spring 546 is installed between the slider 544 and the middle block 548, the slider 544 is fixedly connected to the bottom of the folded film-blocking 543, a connecting wire 545 is arranged inside the guide column 547, one end of the connecting wire 545 passes through the return spring 546 and is fixedly connected to the slider 544.

[0033] Specifically, the folding resistance film 543 can be folded in the resistance film outer frame 542, and the resistance film outer frame 542 limits the edge of the folding resistance film 543 to prevent the folding resistance film 543 from going out of the frame. The folding resistance film 543 is folded by pulling the slider 544 through the connecting wire 545, and is reset by the rebound force of the reset spring 546 when resetting.

[0034] When the inhalation resistance is adjusted by the provided resistance film assembly 54, the manually operated handwheel assembly 51 pulls the connecting thread 545 to slide in the guide column 547, and the connecting thread 545 pulls the slider 544 to slide in the guide column 547 and squeezes the reset spring 546, and the slider 544 drives the folding resistance film 543 to fold in the resistance film outer frame 542, thereby changing the diameter of the oxygen supply port 24. The larger the diameter of the oxygen supply port 24, the smaller the inhalation resistance, which plays a role in adjusting the diameter of the oxygen supply port 24.

[0035] Reference Figure 7 - Figure 8 The handwheel assembly 51 includes a supporting wheel 511 fixedly connected to a guide column 547, an outer wall of the supporting wheel 511 is rotatably connected to an adjusting pointer 512, the other end of the connecting thread 545 is fixedly connected to the fingertip of the adjusting pointer 512 by penetrating the supporting wheel 511, an adjusting groove 513 is provided inside the supporting wheel 511, the fingertip of the adjusting pointer 512 makes an arc motion along the adjusting groove 513, an outer wall of the adjusting pointer 512 is fixedly connected to a hollow connecting tube 514, an end of the hollow connecting tube 514 away from the adjusting pointer 512 is fixedly connected to an adjusting handwheel 515, and the adjusting handwheel 515 is used to drive the rotation of the adjusting pointer 512.

[0036] When adjusting the inhalation resistance through the handwheel assembly 51, the adjusting handwheel 515 is manually operated, and the adjusting handwheel 515 drives the adjusting pointer 512 on the supporting wheel 511 to make an arc movement along the adjusting groove 513 through the hollow connecting tube 514, thereby pulling the connecting wire 545 to slide in the guide column 547, and the caregiver can assist in controlling the inhalation to the maximum control amount by bending the guide column 547, thereby playing a role of control and adjustment.

[0037] Reference Fig.10 - Fig.11 An end-of-exhalation collection component 6 is arranged inside the end-of-exhalation opening 23, and the end-of-exhalation collection component 6 includes a fixed plate 61 fixedly connected to the inner wall of the end-of-exhalation opening 23, the inner wall of the fixed plate 61 is rotatably connected with a swing shaft 63, the outer wall of the swing shaft 63 is fixedly connected with a swing membrane 62, the swing membrane 62 is arranged inside the fixed plate 61, and the inner wall of the fixed plate 61 is fixedly connected with a plurality of uniformly distributed limit blocks 64, and the plurality of limit blocks 64 are used to limit the swing direction of the swing membrane 62.

[0038] Through the end-tidal carbon dioxide collection component 6, when the patient exhales, the exhaled gas is first sprayed toward the end-tidal carbon dioxide collection component 6, and the gas blows the swing membrane 62 to swing at the swing axis 63 in the fixed plate 61, and part of the exhaled gas enters the end-tidal carbon dioxide collection tube 3 through the end-tidal port 23 to be collected. Due to the existence of the swing membrane 62, it can be prevented that air enters the end-tidal carbon dioxide collection tube 3 during inhalation to cause the sampling sample to deviate, thereby playing the role of extracting part of the end-tidal carbon dioxide into the end-tidal carbon dioxide collection tube 3 for collection.

[0039] Reference Fig.12 - Fig.13 Two exhalation adjustment mechanisms 7 are symmetrically arranged inside the mask body 1, and the exhalation adjustment mechanism 7 includes a flip shaft 73 rotatably connected to the inside of the mask body 1, and an exhaust buckle 71 is fixedly connected to the outer wall of the flip shaft 73. A plurality of exhaust holes are provided on the side of the exhaust buckle 71 close to the mask body 1, and a reel assembly 74 is arranged on the side of the exhaust buckle 71 away from the mask body 1. The reel assembly 74 includes a rotating shaft 742 rotatably connected to the inside of the exhaust buckle 71, and a reel handwheel 741 is fixedly connected to the end of the rotating shaft 742 away from the exhaust buckle 71, and two reel films 743 symmetrically arranged are fixedly connected to the outer wall of the rotating shaft 742, and two telescopic springs 744 are fixedly connected to the inside of the exhaust buckle 71, and one end of the two telescopic springs 744 close to the rotating shaft 742 is respectively fixedly connected to the two reel films 743, and two limit stops 72 symmetrically arranged are fixedly connected to the inner wall of the mask body 1, and the two limit stops 72 are respectively used to limit the rotation amplitude of the two exhaust buckles 71.

[0040] When adjusting the exhalation resistance through the exhalation adjustment mechanism 7, the reel handwheel 741 is manually operated, and the reel handwheel 741 drives the rotating shaft 742 to rotate in the exhaust buckle 71. While the rotating shaft 742 rotates, the reel films 743 on both sides are pulled to roll toward the rotating shaft 742, thereby changing the total exhaust volume of the exhaust hole on the exhaust buckle 71. The larger the total exhaust volume of the exhaust hole, the smaller the exhalation resistance. When inhaling through the mouth, the larger wind force blown out will blow the reel film 743, so that the exhaust buckle 71 reaches a state perpendicular to the nasal mask body 1 at the flip axis 73, so that the exhaust volume reaches the maximum state, and the caregiver can bend the rotating shaft 742 to assist in controlling the exhaust to be at the maximum control volume. At this point, the patient's breathing safety in an emergency is ensured, and the effect of improving the rescue effect and safety in an emergency is achieved.

[0041] During use, the nasal mask body 1 is connected to the end-tidal carbon dioxide collection tube 3 and the oxygen supply hose 4 through the dual-channel joint 21, and the respiratory resistance is adjusted according to the patient's physical condition. When adjusting the inhalation resistance, the handwheel assembly 51 is manually operated to control the resistance film assembly 54, thereby changing the caliber of the oxygen supply port 24. The larger the caliber of the oxygen supply port 24, the smaller the inhalation resistance. When adjusting the exhalation resistance, the scroll assembly 74 is manually operated to change the total exhaust volume of the exhaust hole on the exhaust buckle 71. The larger the total exhaust volume of the exhaust hole, the smaller the exhalation resistance. After the respiratory resistance is adjusted, the nasal mask body 1 is covered on the patient's face through the elastic band. When the patient inhales, oxygen-containing air enters the patient's body through the oxygen supply hose 4 and the oxygen supply port 24, wherein the inhalation resistance can be adjusted by the inhalation adjustment mechanism 5 inside the oxygen supply port 24; when the patient exhales, the exhaled gas is first sprayed to the end-tidal collection assembly 6, and part of the exhaled gas enters the end-tidal carbon dioxide collection tube 3 through the end-tidal port 23 and is collected. The remaining exhaled gas is discharged through the exhaust holes on the exhaust buckle 71, and the total exhaust volume of the exhaust holes can be adjusted by the reel assembly 74. When encountering an emergency, the patient will switch to mouth inhalation due to difficulty breathing or impaired consciousness. The mouth inhalation airflow is faster, the ventilation volume is larger, and more carbon dioxide is exhausted. Therefore, it is necessary to adjust the breathing resistance to the minimum in time, that is, the airflow flow diameter is maximized. Therefore, the greater suction force will adsorb the folded resistance film 543 inward, so that the resistance film outer frame 542 is close to the partition plate 22 at the movable axis 541, so that the diameter of the oxygen supply port 24 is in the maximum state. At the same time, the greater wind force blown out will blow the reel film 743, so that the exhaust buckle 71 is perpendicular to the nasal mask body 1 at the flip axis 73, so that the exhaust volume reaches the maximum state, and the caregiver can assist in controlling the inhalation and exhaust to be at the maximum control volume by turning the guide column 547 and the rotating shaft 742. At this point, the patient's breathing safety in an emergency is ensured, and the effect of improving the rescue effect and safety in an emergency is achieved.

[0042] Working principle of the present invention: During operation, the nasal mask body 1 is connected to the end-tidal carbon dioxide collection tube 3 and the oxygen supply hose 4 through the double-channel connector 21, and the breathing resistance is adjusted according to the patient's physical condition.

[0043] When adjusting the inhalation resistance, the adjusting hand wheel 515 is manually operated. The adjusting hand wheel 515 drives the adjusting pointer 512 on the supporting wheel 511 to make an arc movement along the adjusting groove 513 through the hollow connecting tube 514, thereby pulling the connecting wire 545 to slide in the guide column 547. The connecting wire 545 pulls the slider 544 to slide in the guide column 547 and squeezes the reset spring 546. The slider 544 drives the folding resistance film 543 to fold in the resistance film outer frame 542, thereby changing the diameter of the oxygen supply port 24. The larger the diameter of the oxygen supply port 24, the smaller the inhalation resistance.

[0044] When adjusting the exhalation resistance, manually operate the reel hand wheel 741, which drives the rotating shaft 742 to rotate in the exhaust buckle 71. While the rotating shaft 742 rotates, it pulls the reel films 743 on both sides to roll toward the rotating shaft 742, thereby changing the total exhaust volume of the exhaust holes on the exhaust buckle 71. The larger the total exhaust volume of the exhaust holes, the smaller the exhalation resistance.

[0045] After the breathing resistance is adjusted, the nasal mask body 1 is covered on the patient's face by an elastic band. When the patient inhales, oxygen-containing air enters the patient's body through the oxygen supply hose 4 and the oxygen supply port 24, and the inhalation resistance can be adjusted by the inhalation adjustment mechanism 5 inside the oxygen supply port 24; when the patient exhales, the exhaled gas is first sprayed to the end-tidal collection component 6, and the gas blows the swing membrane 62 to swing at the swing shaft 63 in the fixed plate 61, and part of the exhaled gas enters the end-tidal carbon dioxide collection tube 3 through the end-tidal port 23 to be collected, and the rest of the exhaled gas is discharged through the exhaust hole on the exhaust buckle 71, and the total exhaust volume of the exhaust hole can be adjusted by the reel component 74.

[0046] When encountering an emergency, the patient will switch to mouth inhalation due to difficulty breathing or impaired consciousness. Mouth inhalation has a faster airflow, a larger ventilation volume, and more carbon dioxide when exhausting. Therefore, it is necessary to adjust the breathing resistance to the minimum in time, that is, the airflow circulation diameter is maximized. Therefore, the larger suction force will adsorb the folded resistance film 543 inward, so that the resistance film outer frame 542 is close to the partition plate 22 at the movable axis 541, so that the diameter of the oxygen supply port 24 is at the maximum state. At the same time, the larger wind force blown out will blow the scroll film 743, so that the exhaust buckle 71 is perpendicular to the nasal mask body 1 at the flip axis 73, so that the exhaust volume reaches the maximum state, and the caregiver can assist in controlling the inspiration and exhaust to be at the maximum control amount by turning the guide column 547 and the rotating shaft 742. At this point, the patient's breathing safety in an emergency is ensured, and the effect of improving the rescue effect and safety in an emergency is achieved.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An adjustable breathing resistance type end-tidal carbon dioxide monitoring nasal mask, comprising a nasal mask body, an end-tidal carbon dioxide collection tube, an oxygen supply hose, and a connector assembly disposed at one end of the nasal mask body for connecting the end-tidal carbon dioxide collection tube and the oxygen supply hose, characterized in that: The connector assembly includes a double-channel connector connected to the nasal mask body, the inner wall of the double-channel connector is fixedly connected to a partition plate, the interior of the double-channel connector is divided into an end-expiratory port and an oxygen supply port by the partition plate, the end-expiratory port is connected to an end-expiratory carbon dioxide collection tube, the oxygen supply port is connected to an oxygen supply hose, an end-expiratory collection assembly is arranged inside the end-expiratory port, and an inhalation regulating mechanism is arranged inside the oxygen supply port; The inhalation adjustment mechanism includes a handwheel assembly for manual adjustment, a limit groove opened inside the double-channel joint, a flexible sealing strip installed between the limit groove and the oxygen supply port, and a film-blocking assembly for adjusting the size of the oxygen supply port, the handwheel assembly is arranged outside the double-channel joint, and the film-blocking assembly is arranged inside the oxygen supply port; Two exhalation regulating mechanisms are symmetrically arranged inside the mask body, and the exhalation regulating mechanism includes a flip shaft rotatably connected to the inside of the mask body, an exhaust buckle is fixedly connected to the outer wall of the flip shaft, a plurality of exhaust holes are provided on a side of the exhaust buckle close to the mask body, and a reel assembly is provided on a side of the exhaust buckle away from the mask body.

2. The adjustable respiratory resistance type end-tidal carbon dioxide monitoring nasal mask according to claim 1, characterized in that: The film-blocking assembly comprises a movable shaft rotatably connected to the bottom of the partition plate, a film-blocking outer frame is fixedly connected to the bottom of the movable shaft, a folded film-blocking outer frame is slidably connected to the inside, and a guide column is fixedly connected to the outer wall of the film-blocking outer frame.

3. The adjustable respiratory resistance carbon dioxide monitoring nasal mask according to claim 2, characterized in that: The middle section of the guide column is fixedly connected with a middle stopper, the interior of the guide column is slidably connected with a slider, a return spring is installed between the slider and the middle stopper, the slider is fixedly connected to the bottom of the folding resistance film, a connecting wire is arranged inside the guide column, one end of the connecting wire passes through the return spring and is fixedly connected to the slider.

4. The adjustable respiratory resistance carbon dioxide monitoring nasal mask according to claim 3, characterized in that: The handwheel assembly includes a supporting wheel fixedly connected to a guide column, an outer wall of the supporting wheel is rotatably connected to an adjusting pointer, the other end of the connecting wire is fixedly connected to the fingertip of the adjusting pointer by penetrating the supporting wheel, an adjusting groove is provided inside the supporting wheel, and the fingertip of the adjusting pointer moves in an arc shape along the adjusting groove.

5. The adjustable respiratory resistance carbon dioxide monitoring nasal mask according to claim 4, characterized in that: The outer wall of the adjustment pointer is fixedly connected with a hollow connecting tube, and one end of the hollow connecting tube away from the adjustment pointer is fixedly connected with an adjustment handwheel, and the adjustment handwheel is used to drive the rotation of the adjustment pointer.

6. The adjustable breathing resistance type end-tidal carbon dioxide monitoring nasal mask according to claim 1, characterized in that: The end-of-exhalation collection component includes a fixed plate fixedly connected to the inner wall of the end-of-exhalation opening, the inner wall of the fixed plate is rotatably connected to a swing shaft, the outer wall of the swing shaft is fixedly connected to a swing membrane, the swing membrane is arranged inside the fixed plate, and the inner wall of the fixed plate is fixedly connected to a plurality of evenly distributed limit blocks, and the plurality of limit blocks are used to limit the swing direction of the swing membrane.

7. The adjustable respiratory resistance carbon dioxide monitoring nasal mask according to claim 1, characterized in that: The reel assembly includes a rotating shaft rotatably connected to the inside of the exhaust buckle, the end of the rotating shaft away from the exhaust buckle is fixedly connected to a reel handwheel, the outer wall of the rotating shaft is fixedly connected to two axially symmetrically arranged reel films, and the inside of the exhaust buckle is fixedly connected to two telescopic springs, and the ends of the two telescopic springs close to the rotating shaft are respectively fixedly connected to the two reel films.

8. The adjustable respiratory resistance carbon dioxide monitoring nasal mask according to claim 7, characterized in that: The inner wall of the nose mask body is fixedly connected with two symmetrically arranged limit stops, and the two limit stops are respectively used to limit the rotation range of the two exhaust buckles.

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