An intratracheal air bag pressure monitoring system

Abstract

The present application discloses an intratracheal balloon pressure monitoring system, which is arranged on an endotracheal tube to monitor the pressure of the balloon at the end of the endotracheal tube; it belongs to the field of medical devices. It includes: a tube, including a tube wall for inserting into the nasal cavity / oral cavity and a tube cavity defined by the tube wall; an air bag, arranged on the tube wall and connected to the tube cavity; an air film, arranged at the end of the tube away from the air bag and connected to the tube cavity; a first connecting piece, fixedly arranged on the air film; an air pressure component, arranged on the first connecting piece; wherein the air film forms an injection port to connect the tube cavity, and the first connecting piece forms a connecting cavity connected to the injection port; the air pressure component includes an injection component arranged in the connecting cavity and connected to the injection port to inject gas into the tube cavity, and a detection component arranged on the connecting cavity for detecting the air pressure of the balloon. The beneficial effect of the present application is to provide an intratracheal balloon pressure monitoring system that can automatically detect the balloon pressure and automatically adjust the balloon pressure.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular, to an intratracheal balloon pressure monitoring system. Background Art

[0002] Endotracheal intubation is a method of inserting a special endotracheal tube into the trachea or bronchus through the oral or nasal cavity and the glottis, providing the best conditions for airway patency, ventilation and oxygen supply, and airway suction. It is an important measure to rescue patients with respiratory dysfunction.

[0003] During clinical endotracheal intubation, the tightness of the balloon should be appropriate. If the balloon is inflated too much or the balloon pressure is too high, it will affect the airway mucosa. Clinical research results show that when the balloon pressure exceeds 30cmH2O (1cmH2O=0.098KPa), the blood flow of the mucosal capillaries begins to decrease. When the balloon pressure exceeds 50cmH2O, the blood flow is completely blocked. If the tracheal mucosa is compressed for more than a certain period of time, it will cause ischemic damage or even necrosis of the tracheal mucosa. In severe cases, tracheoesophageal fistula may occur. On the contrary, if the balloon is under-inflated, it will cause air leakage, aspiration, etc.

[0004] Therefore, a monitoring system capable of detecting the air pressure of the air bag in the endotracheal tube is required. Summary of the invention

[0005] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0006] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide an endotracheal balloon pressure monitoring system, which is arranged on an endotracheal tube to monitor the pressure of the balloon at the end of the endotracheal tube; comprising:

[0007] A cannula, comprising a tube wall for inserting into the nasal cavity and a lumen defined by the tube wall;

[0008] An air bag is arranged on the tube wall and communicated with the tube cavity;

[0009] An air membrane is arranged at the end of the cannula away from the air bag and is connected with the lumen;

[0010] A first connecting member is fixedly arranged on the air film;

[0011] An adjusting rod, disposed on the first connecting member and in contact with the air film;

[0012] A pneumatic assembly, disposed on the first connecting member;

[0013] Among them, the air film forms an injection port to connect the tube cavity, and the first connecting piece forms a connecting cavity connected to the injection port; the air pressure component includes an injection component arranged in the connecting cavity and connected to the injection port to inject gas into the tube cavity, and a detection component arranged on the connecting cavity for detecting the air pressure of the airbag.

[0014] Through the design of the above scheme, the airbag is inserted into the human body through the cannula; the airbag is inflated through the air injection component; the pressure of the airbag can be detected in real time through the set detection component; and the air pressure of the airbag can be changed by the setting of the adjustment rod to resist the deformation of the air film.

[0015] In some embodiments, an adjustment rod is provided on the first connecting member;

[0016] The adjusting rod is arranged on the first connecting member and inserted into the communicating cavity;

[0017] The adjusting rod is movably connected to the first connecting member and contacts the surface of the air film.

[0018] In some embodiments, a thread groove is formed on the surface of the adjusting rod;

[0019] A threaded ring is rotatably provided on the first connecting member and is threadably engaged with the thread groove;

[0020] The first connecting member is also provided with a rotary motor for driving the threaded ring to rotate;

[0021] The surface of the first connecting piece penetrates into the communicating cavity to form a limiting hole corresponding to the adjusting rod, so that the adjusting rod is limited in the circumferential direction.

[0022] In some embodiments, the air film is configured as a cone, and a middle position along the axial direction corresponds to the adjustment rod.

[0023] In some embodiments, the gas injection component includes:

[0024] A second connecting member having a gas injection cavity connected to the gas injection port;

[0025] A piston block is movably disposed in the gas injection cavity;

[0026] A driving member, disposed on the second connecting member to drive the piston block to move;

[0027] Among them, the second connecting piece is fixedly arranged in the connecting cavity and contacts with the air film; the bottom surface of the air injection cavity opposite to the piston block penetrates to the air injection port to form a through hole; a blocking block for blocking the through hole is arranged on the surface of the second connecting piece away from the air injection cavity, and a first elastic piece is arranged between the blocking block and the second connecting piece; a one-way valve is arranged on the blocking block, and the one-way valve only allows gas to enter the air injection cavity from the outside through the one-way valve.

[0028] In some embodiments, the detection component includes:

[0029] A pressure measuring column, forming a pressure measuring cavity communicated with the air film;

[0030] A pressure measuring membrane is arranged at the cavity opening of the pressure measuring cavity;

[0031] A hydraulic column is movably disposed in the pressure measuring chamber;

[0032] A pressure detector is arranged in the pressure measuring cavity;

[0033] Wherein, a second elastic member is arranged between the hydraulic column and the pressure detector; and normal pressure liquid is always present between the pressure measuring membrane and the hydraulic column.

[0034] In some embodiments, the end surface of the pressure measuring column is provided with a cylindrical wall communicating with the outside;

[0035] The inner wall portion of the cylindrical wall is connected to the gas injection cavity to form a gas leakage port;

[0036] The air leakage port is provided with an air blocking block, which moves along the axial direction of the cylindrical wall;

[0037] A resistance block is arranged on the air blocking block to resist the hydraulic column.

[0038] In some embodiments, the gas blocking block is located on the surface of the cylinder wall;

[0039] The air blocking block is connected to the notch of the air vent through a sealing film.

[0040] In some embodiments, the rotary motor is electrically connected to the pressure detector.

[0041] The beneficial effect of the present application is that it provides an intratracheal airbag pressure monitoring system that can realize automatic detection and automatic adjustment of airbag pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0043] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0044] In the attached picture:

[0045] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0046] Figure 2 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the cannula;

[0047] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing a schematic diagram of plugging and connecting the cannula and the first connecting member;

[0048] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the overall exploded schematic structure;

[0049] Figure 5 It is a structural schematic diagram of a part of the embodiment, mainly showing a half-section schematic structure of the whole;

[0050] Figure 6 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the second connecting member;

[0051] Figure 7 yes Figure 6 Enlarged view of part A.

[0052] Reference numerals:

[0053] 1. Cannula; 2. Air bag; 3. Air film; 4. First connecting piece; 5. Tube cavity; 6. Air injection port; 7. Connecting cavity; 8. Step; 9. Concave edge; 10. Second connecting piece; 11. Piston block; 12. Air injection cavity; 13. Through hole; 14. First elastic piece; 15. Blocking block; 16. Third elastic piece; 18. First magnetic block; 19. Rotating block; 20. Second magnetic block; 21. One-way valve; 22. Pressure measuring column; 23. Pressure measuring membrane; 24. Hydraulic column; 25. Pressure detector; 28. Second elastic piece; 29. ​​Cylindrical wall; 30. Air vent; 31. Sealing membrane; 32. Air blocking block; 33. Resistance block; 34. Adjusting rod; 35. Threaded ring. DETAILED DESCRIPTION

[0054] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0055] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0056] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0057] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0058] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0059] Reference Figures 1 to 7 , an intratracheal airbag pressure monitoring system, arranged on an endotracheal tube 1 to monitor the pressure of an airbag 2 at the end of the endotracheal tube 1; comprising: a tube 1, an airbag 2, an air membrane 3, a first connecting member 4, and an air pressure component;

[0060] The cannula 1 comprises a tube wall for inserting into the nasal cavity / oral cavity and a tube cavity 5 defined by the tube wall, and an air bag 2 is arranged at the end of the cannula 1; in the initial state, the air bag 2 moves into the human trachea through the trachea and inflates the air bag 2 through the tube cavity 5 to close the gap between the cannula 1 and the tracheal wall; more specifically, an air film 3 is arranged at the end of the cannula 1 away from the air bag 2; wherein the air film 3 is integrally formed with the cannula 1 and has a thickness less than that of the cannula 1, and an air injection port 6 connected to the tube cavity 5 is formed at one end of the air film 3 away from the air bag 2; gas is injected through the air injection port 6 to inflate the air bag 2;

[0061] In a more specific embodiment, the first connecting member 4 is fixedly arranged on the air membrane 3, and the first connecting member 4 forms a connecting cavity 7 connected with the gas injection port 6; the air membrane 3 is fixedly arranged on the inner wall of the connecting cavity 7, specifically, the inner wall of the connecting cavity 7 forms a step 8, and the side edge of the air membrane 3 located at the gas injection port 6 is turned outward to form a concave edge 9 that abuts against the step 8; the air membrane 3 is inserted into the connecting cavity 7 so that the concave edge 9 abuts against the step 8 to achieve installation.

[0062] The air pressure component is arranged on the first connecting member 4, and is used to inject air into the air injection port 6 and detect the air pressure of the airbag 2; wherein, the air pressure component includes an air injection component and a detection component; the air injection component includes: a second connecting member 10, a piston block 11, and a driving component; the second connecting member 10 is fixedly arranged in the connecting cavity 7, and its fixing method is preferably threaded connection. Specifically, after the second connecting member 10 is threadedly fixed in the connecting cavity 7, the end portion can contact with the concave edge 9 that contacts with the step 8 to achieve complete fixation of the cannula 1 and the first connecting member 4; more specifically, the second connecting member 10 has an air injection cavity connected to the air injection port 6 12; the bottom of the injection cavity 12 penetrates through the injection port 6 to form a through hole 13, and the second connecting member 10 is away from the end face of the injection cavity 12 and a blocking block 15 is arranged at the through hole 13, and the blocking block 15 completely covers the through hole 13; a first elastic member 14 is arranged between the blocking block 15 and the second connecting member 10, and the first elastic member 14 is a spring, and gives the blocking block 15 an elastic force to always block the through hole 13; with such an arrangement, the gas in the injection cavity 12 can enter the injection port 6 through the through hole 13, and the injection port 6 cannot enter the injection cavity 12 from the through hole 13; it can play a role in blocking the airbag 2.

[0063] In a more specific real-time scheme, the piston block 11 is movably arranged on the inner wall of the gas injection chamber 12, and the piston block 11 is driven by a driving component to reciprocate along the axial direction of the through hole 13. A third elastic member 16 is arranged between the piston block 11 and the bottom surface of the gas injection chamber 12. The third elastic member 16 is a spring that always gives the piston block 11 an elastic force away from the through hole 13; in the present application, a partition is fixedly arranged inside the gas injection chamber 12 to separate the gas injection chamber 12 into two gas injection chambers 12; the two gas injection chambers 12 both have piston blocks 11; wherein, a sealing cover is also fixedly arranged at the cavity opening of the gas injection chamber 12 to seal the two gas injection chambers 12; the driving component comprises: a first magnetic block 18 fixedly arranged on the piston block 11; a rotating block 19 rotatably arranged on the sealing cover, A second magnetic block 20 is arranged; the first magnetic block 18 and the second magnetic block 20 have mutually repelling magnetic fields; the rotating block 19 is driven to rotate by a motor; it can be understood that when the motor drives the rotating block 19 to rotate, the second magnetic block 20 will repeatedly generate mutually repelling magnetic fields with the first magnetic block 18 arranged on the two piston blocks 11; in this way, the two piston blocks 11 can move alternately in the two injection chambers 12; more specifically, a one-way valve 21 is arranged on each piston block 11, and the one-way valve 21 can only allow gas to flow from the outside through the one-way valve 21 and be injected into the injection chamber 12; through the arrangement of the above-mentioned scheme, the alternating movement of the two piston blocks 11 can continuously inflate the airbag 2 without causing a sense of frustration, thereby improving the comfort during use and reducing discomfort.

[0064] The detection components include: a pressure measuring column 22, a pressure measuring membrane 23, a hydraulic column 24, and a pressure detector 25; wherein, the bottom surface of the gas injection cavity 12 is partially raised to form the pressure measuring column 22, and the inside of the pressure measuring column 22 axially penetrates to the gas injection port 6 to form a pressure measuring cavity; the pressure measuring membrane 23 is fixedly arranged at the cavity opening of the pressure measuring cavity, and the pressure measuring membrane 23 is made of rubber or silicone, and can be deformed under the action of external pressure and can restore to the state before deformation after the pressure disappears; a hydraulic column 24 is movably arranged in the pressure measuring cavity, and there is liquid between the hydraulic column 24 and the pressure measuring membrane 23; the liquid can be any one of oil and clean water, After the pressure measuring membrane 23 is deformed under pressure, the liquid can be pressurized to form hydraulic pressure, thereby driving the hydraulic column 24 to move; the hydraulic column 24 is connected to the bottom of the pressure measuring cavity through a second elastic member 28, and the second elastic member 28 is a spring that can always give the hydraulic column 24 an elastic force close to the pressure measuring membrane 23; it can be understood that the air pressure generated when the airbag 2 is filled with gas can cause the pressure measuring membrane 23 to deform, thereby causing the liquid to generate hydraulic drive to move; a pressure detector 25 for detecting hydraulic pressure is also arranged on the hydraulic column 24, which can detect the hydraulic pressure, and the hydraulic pressure value can reflect the pressure of the airbag 2.

[0065] More specifically, the end face of the pressure measuring column 22 away from the pressure measuring membrane 23 forms a cylindrical wall 29 connected to the outside world, and the surface of the cylindrical wall 29 is radially penetrated to form an air vent 30 connected to the air injection chamber 12, and the air vent 30 is always located between the through hole 13 and the piston block 11 in the axial direction of the pressure measuring column 22; wherein, the air vent 30 is provided with an air blocking block 32, and the air blocking block 32 is movably arranged on the cylindrical wall 29; more specifically, the air blocking block 32 is connected to the notch of the air vent 30 through a sealing membrane 31; in the initial state, the sealing membrane 31 and the air blocking block 32 can completely seal the air vent 30, and after the air blocking block 32 moves, the sealing membrane 31 can be deformed and folded to fully open the air vent 30 to connect the outside world and the air injection chamber 12; at this time, the gas generated when the piston block 11 moves again can be discharged from the air vent 30.

[0066] More specifically, a portion of the surface of the air blocking block 32 is raised to form a resistance block 33, which is inserted into the pressure measuring chamber and resists against the hydraulic column 24; wherein, when the hydraulic column 24 moves and approaches the resistance block 33, after the airbag 2 reaches a predetermined air pressure, the hydraulic column 24 will resist the resistance block 33 to move the air blocking block 32, thereby opening the air vent 30; at this time, further movement of the piston block 11 will not inflate the airbag 2.

[0067] In another specific embodiment, the adjusting rod 34 is arranged on the first connecting member 4 and inserted into the connecting cavity 7; wherein the adjusting rod 34 is movably connected to the first connecting member 4 and contacts the surface of the air film 3; more specifically, the surface of the first connecting member 4 penetrates into the connecting cavity 7 to form a lower limit hole corresponding to the adjusting rod 34, and the limit hole is a hole with a non-circular end face, which can limit the adjusting rod 34 in the circumferential direction; a thread groove is formed on the surface of the adjusting rod 34, and a threaded inner ring that meshes with the thread groove is rotatably arranged on the first connecting member 4; rotating the threaded ring 35 can drive the adjusting rod 34 to move along the extension direction of the socket and contact the surface of the air film 3 to cause the air film 3 to deform; wherein the air film 3 is constructed in a cone shape, and is made of rubber, silicone or other materials that can be deformed under the action of external force and restore to its original state after the external force disappears, and the middle position of the air film 3 along the axial direction corresponds to the adjusting rod 34;

[0068] A central processing unit is also provided on the first connecting member 4, and the central processing unit is electrically connected to the pressure detector 25 to receive the pressure electrical signal transmitted by the pressure detector 25; specifically, after the airbag 2 is inflated, the pressure detector 25 can monitor the air pressure of the airbag 2; when the internal pressure of the airbag 2 is reduced, the central processing unit can start the rotating motor to drive the threaded ring 35 to rotate, thereby driving the adjusting rod 34 to move and contact the air film 3; at this time, the air film 3 is deformed, and the gas originally existing in the air film 3 is pressurized and exerts pressure on the airbag 2 again; at the same time, the air pressure generated by the airbag 2 exerts pressure on the pressure measuring membrane 23, thereby automatically adjusting the pressure of the airbag 2.

[0069] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. An intratracheal balloon pressure monitoring system, arranged on an endotracheal tube to monitor the pressure of the balloon at the end of the endotracheal tube; characterized in that: include: A cannula, comprising a tube wall for insertion into the nasal cavity and a lumen defined by the tube wall; An air bag is arranged on the tube wall and communicated with the tube cavity; an air film is arranged at the end of the cannula away from the air bag and communicated with the tube cavity; a first connecting member is fixedly arranged on the air film; An adjusting rod is arranged on the first connecting member and contacts the air film; a pneumatic assembly is arranged on the first connecting member; wherein the air film forms a gas injection port to communicate with the tube cavity, and the first connecting member forms a connecting cavity to communicate with the gas injection port; the pneumatic assembly includes a gas injection component arranged in the connecting cavity and connected to the gas injection port to inject gas into the tube cavity, and a detection component arranged on the connecting cavity for detecting the air pressure of the airbag; The piston block (11) is movably arranged on the inner wall of the gas injection cavity (12); a third elastic member (16) is arranged between the piston block (11) and the bottom surface of the gas injection cavity (12); a partition is fixedly arranged inside the gas injection cavity (12) to separate the gas injection cavity (12) into two gas injection cavities (12); the two gas injection cavities (12) both have a piston block (11); a sealing cover is also fixedly arranged at the cavity opening of the gas injection cavity (12) to seal the two gas injection cavities (12); the gas injection component comprises a driving component, the driving component comprises a first magnetic block (18) fixedly arranged on the piston block (11); a rotating block (19) rotatably arranged on the sealing cover, and a second magnetic block (20) is fixedly arranged on the rotating block (19); the first magnetic block (18) and the second magnetic block (20) have mutually repelling magnetic fields; the rotating block (19) is driven to rotate by a motor; and a one-way valve (21) is arranged on the piston block (11); The gas injection component comprises: a second connecting member, having a gas injection cavity connected to the gas injection port; a driving member, arranged on the second connecting member to drive the piston block to move; wherein the second connecting member is fixedly arranged in the connecting cavity and contacts the gas film; the bottom surface of the gas injection cavity opposite to the piston block penetrates to the gas injection port to form a through hole; a blocking block for blocking the through hole is arranged on the surface of the second connecting member away from the gas injection cavity, and a first elastic member is arranged between the blocking block and the second connecting member; a one-way valve is arranged on the blocking block, and the one-way valve only allows gas to enter the gas injection cavity from the outside through the one-way valve; The detection component includes: a pressure measuring column, forming a pressure measuring cavity connected to the air film; a pressure measuring film, arranged at the cavity opening of the pressure measuring cavity; a hydraulic column, movably arranged in the pressure measuring cavity; a pressure detector, arranged in the pressure measuring cavity; wherein a second elastic member is arranged between the hydraulic column and the pressure detector; and there is always a normal pressure liquid between the pressure measuring film and the hydraulic column; The end face of the pressure measuring column is provided with a cylindrical wall connected to the outside; the inner wall portion of the cylindrical wall is connected to the air injection cavity to form an air leakage port; the air leakage port is provided with an air blocking block, and the air blocking block moves along the axial direction of the cylindrical wall; a resistance block is provided on the air blocking block to resist the hydraulic column.

2. An endotracheal cuff pressure monitoring system according to claim 1, characterized in that: The adjusting rod is arranged on the first connecting member and inserted into the communicating cavity; wherein the adjusting rod is movably connected to the first connecting member and contacts the air film surface.

3. An endotracheal cuff pressure monitoring system according to claim 2, characterized in that: A thread groove is formed on the surface of the adjusting rod; a thread ring is rotatably arranged on the first connecting member and is threadably engaged with the thread groove; a rotating motor for driving the thread ring to rotate is also arranged on the first connecting member; wherein, a limiting hole corresponding to the adjusting rod is formed on the surface of the first connecting member through the connecting cavity, so that the adjusting rod is limited in the circumferential direction.

4. The endotracheal cuff pressure monitoring system according to claim 3, characterized in that: The air film is constructed in a cone shape, and a middle position of the air film in the axial direction corresponds to the adjustment rod.

5. The endotracheal cuff pressure monitoring system according to claim 1, characterized in that: The gas blocking block is located on the surface of the cylindrical wall; the gas blocking block is connected to the notch of the gas leakage port through a sealing film.

6. The endotracheal cuff pressure monitoring system according to claim 3, characterized in that: The rotary motor is electrically connected to the pressure detector.

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