Double-air-bag nasal ventilation catheter

Abstract

The double-air-bag nasal ventilation catheter comprises a catheter body, the air inlet end of the catheter body is connected with a breathing machine connector, and the air outlet end of the catheter body is provided with an arc-shaped insertion part. Ventilation openings are formed in the two sides of the insertion part so that the top end of the insertion part can form an arch-bridge-shaped front end. A first air bag is arranged on the catheter body close to the air outlet end; a second air bag is arranged in the middle section of the catheter body; a bending structure is arranged at the end, close to the breathing machine connector, of the catheter body. The two sides of the insertion part at the front end of the double-air-bag nasal ventilation catheter are both provided with the air vents, so that the top end of the insertion part forms an arch-bridge-shaped round and soft front end, and when the ventilation catheter is inserted into a nasal cavity, the arch-bridge-shaped front end is used as the foremost end to be in contact with the nasal cavity and cannot scratch nasal mucosa. The bent structure is arranged, so that the breathing machine connector can be far away from the mouth of the patient, and enough space is reserved for surgical operation.

Description

Technical Field

[0001] The utility model belongs to the field of auxiliary ventilation mediation equipment, in particular to a double-airbag nasal ventilation catheter. Background Art

[0002] Nasotracheal intubation is a common endotracheal intubation technique in clinical practice. It is mostly limited to oral, perioral, and cervical surgeries that require a good surgical field for the surgeon to facilitate surgical operations. At present, most clinical nasotracheal intubations use ordinary endotracheal tubes, which have the following defects: first, ordinary tracheas are hard in texture, poor in plasticity, and difficult to adapt to the flat structure of the nasal cavity; second, when the catheter is intubated through the nose, the air outlet end is set at a sharp inclination angle, which can easily scratch the nasal septum piriform area, middle turbinate, and inferior turbinate, causing damage to the nasal mucosa and even bleeding, with the risk of blood being accidentally inhaled into the airway; third, because there are many soft tissues in the nose and the fixation is poor, it is easy to fall off the tube in the prone position and during transportation. Fourth, during the operation, the part of the nasotracheal tube outside the nose is usually located in the patient's mouth, which hinders the surgical oral operation. Utility Model Content

[0003] The utility model aims at the technical problems that the existing common endotracheal tubes are easy to scratch the nasal mucosa, have poor plasticity and are easy to fall out. The utility model proposes a double-cuff nasal ventilation tube that is easy to insert into the nasal cavity and can avoid mucosal damage, and has a bending structure at the rear end. The utility model aims at the technical problems that the existing common endotracheal tubes are easy to scratch the nasal mucosa, have poor plasticity and are easy to fall out ... proposes a double-cuff nasal ventilation tube that is easy to insert into the nasal cavity and can avoid mucosal damage, and has a bending structure at the rear end. The utility model aims at the difficult airway patients often encountered in clinical practice, such as snoring, ankylosing spondylitis, mucopolysaccharidosis, Mallampati grade III to IV, poor neck mobility, head and tongue hypertrophy, etc., who are difficult to intubate through the mouth. The utility model adopts the technology combined with awake slow induction to smoothly solve the problem.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A double-balloon nasal ventilation catheter comprises a catheter body, wherein the air inlet end of the catheter body is connected to a ventilator connector, and the air outlet end of the catheter body is provided with an arc-shaped insertion portion; both sides of the insertion portion are provided with ventilation ports so that the top of the insertion portion forms an arch bridge-shaped front end;

[0006] The catheter body is provided with a first air bag at a position close to the air outlet end, and a second air bag is provided at the middle section of the catheter body;

[0007] One end of the catheter body close to the ventilator connector is provided with a bending structure.

[0008] Preferably, the bending structure includes a bending portion with a certain curvature that is injection molded or includes a deformable metal sheet arranged on the side wall of the catheter body.

[0009] Preferably, the bending structure comprises a fixing belt, one end of which is connected to the catheter body, and a fixing belt fixing buckle is provided on the catheter body near the ventilator connector.

[0010] Preferably, the bending structure comprises a corrugated telescopic tube sleeved on the catheter body near the ventilator connector end.

[0011] Preferably, the distance between the bending structure and the top end of the air outlet of the catheter body is 0.68L-0.72L, where L is the total length of the catheter body.

[0012] Preferably, the distance between the second air bag and the top end of the air outlet end of the catheter body is 8.5 cm-19.5 cm.

[0013] Preferably, the catheter body, the first airbag and the second airbag are all made of soft plastic or rubber, and the inner surface and / or outer surface of the catheter body are coated with a super-slip coating.

[0014] Preferably, an inflation channel connecting the first airbag and the second airbag is provided in the tube wall of the catheter body, and the end of the inflation channel is connected to the inflation bag. The inflation bag includes an airbag bag and a connecting tube located at the front end of the airbag bag, and the inner wall of the connecting tube is provided with a protrusion.

[0015] Preferably, a spring wire is arranged inside the tube wall of the catheter body.

[0016] Preferably, the catheter body is arc-shaped as a whole, a suction hole is provided on the outer back side of the arc between the first airbag and the second airbag, close to the first airbag, a suction channel connected to the suction hole is provided on the catheter body, and the end of the suction channel is connected to the connector.

[0017] Compared with the prior art, the advantages and positive effects of the utility model are:

[0018] The front end of the double-airbag nasal ventilation catheter is provided with ventilation ports on both sides of the insertion part, so that the top of the insertion part forms an arch-shaped, rounded and soft front end. When the ventilation catheter is inserted into the nasal cavity, the arch-shaped front end contacts the nasal cavity as the front end, and will not scratch the nasal mucosa. When the ventilation catheter enters a narrow part of the nasal cavity, the arch-shaped front end fits the flat structure of the nasal cavity, so that it can pass through the narrow position smoothly. The two ventilation ports can ensure the ventilation volume of the left and right lungs and improve the ventilation effect.

[0019] When the double airbags are set, if the outlet end of the ventilation catheter is curled during the insertion of the nasal cavity, a sharp angle will be formed at the tortuous position, which will cause scratches and damage to the piriform area of ​​the nasal septum, the middle turbinate and the inferior turbinate during the insertion process. At this time, inflating the first airbag to expand the nasal cavity space can make the outlet end of the catheter rely on elastic force to restore its shape, which can prevent damage to the nasal mucosa. By adjusting the amount of gas in the first airbag, the end of the outlet end can be aligned with the glottis, which is convenient for the tracheal tube to be inserted into the glottis, which can solve various difficult airway problems such as stenosis, high laryngeal stenosis and difficulty in lifting the mandible, and reduce glottis damage, so as to improve the smoothness and convenience of tracheal intubation and increase the safety of the general anesthesia induction period.

[0020] After the second airbag is inflated, it is located at the nasal concha and plays a fixing role, which can effectively prevent the ventilation tube from falling out. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of implementation 1 of the utility model;

[0022] Figure 2 It is a partial structural schematic diagram of implementation 1 of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the inflatable bag according to Embodiment 1 of the present utility model;

[0024] Figure 4 This is a schematic diagram of the structure of implementation 2 of the utility model;

[0025] In the above figures: 1. catheter body; 11. insertion part; 12. large vent; 13. arch-shaped front end; 14. small vent; 2. ventilator connector; 3. first air bag; 4. second air bag; 5. inflation channel; 6. inflation bag; 61. inflation tube; 62. air bag bag; 63. connecting tube; 631. upper stop ring; 632. lower stop ring; 633. pressing column; 634. retaining ring; 635. raised part; 7. deformable metal sheet; 8. fixing belt; 9. fixing buckle. DETAILED DESCRIPTION

[0026] In order to better understand the present invention, a detailed description is given below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1

[0028] like Figure 1 , Figure 2As shown, a double-balloon nasal ventilation catheter comprises a catheter body 1, wherein the air inlet end of the catheter body 1 is connected to a ventilator connector 2 for connecting to the ventilator outlet pipeline, and the air outlet end of the catheter body 1 is provided with an arc-shaped insertion portion 11. Ventilation ports are provided on both sides of the insertion portion 11, so that an arch-shaped front end 13 is formed at the top of the insertion portion 11. Preferably, one of the vents is larger than the other vent, the edge of the large vent 12 is close to or exceeds the central axis of the insertion portion 11, and the small vent 14 does not reach the central axis. The two vents can ensure sufficient ventilation, and the larger vent can also smoothly pass other auxiliary equipment such as a fiberoptic bronchoscope to ensure smooth endotracheal intubation. The positions of the large vent and the small vent are interchanged according to whether the nasal ventilation catheter is used for the left nostril or the right nostril. When the ventilation catheter is inserted into the nasal cavity, the arch-shaped front end 13 can pass smoothly, and the arch-shaped front end 13 is in contact with the nasal cavity as the front end, and will not scratch the nasal mucosa.

[0029] The catheter body 1 is provided with a first airbag 3 near the air outlet, and a second airbag 4 is provided in the middle of the catheter body 1, and the distance between the second airbag 4 and the air outlet of the catheter body 1 is 8.5cm-19.5cm. The catheter body 1 forms a certain curvature during injection molding, which conforms to the physiological characteristics of the nasal ventilation path and is easy to insert into the nasal cavity. The outer diameters of the first airbag 3 and the second airbag 4 are set to 10mm-40mm in various specifications, and different airbag sizes can be suitable for different patients. During the process of inserting the ventilation catheter into the nasal cavity, if the air outlet of the catheter is curled, a sharp angle will be formed at the tortuous position, thereby causing scratches and damage to the piriform area of ​​the nasal septum, the middle turbinate and the inferior turbinate during the insertion process. At this time, inflating the first airbag 3 to expand the nasal space can make the arch bridge part of the catheter air outlet reshape by elastic force, which can prevent damage to the nasal mucosa. By adjusting the amount of gas in the first airbag 3, the end of the air outlet is aligned with the glottis, which can reduce glottis damage and improve the smoothness and convenience of tracheal intubation. After the second airbag 4 is inflated, it is located at the nasal concha, plays a fixing role, and can effectively prevent the ventilation tube from falling out. To increase the anti-skid effect, the outer wall of the second airbag 4 can be provided with anti-skid patterns.

[0030] In order to facilitate the inflation of the first airbag 3 and the second airbag 4, an inflation channel 5 connecting the first airbag 3 and the second airbag 4 is provided in the tube wall of the catheter body 1, and the end of the inflation channel 5 is connected to the inflatable bag 6 through an inflation tube 61. The first airbag 3 and the second airbag 4 can be inflated and deflated at the same time, or they can be inflated and deflated independently. When inflated and deflated at the same time, it is sufficient to set an inflation channel 5 and an inflatable bag 6. When inflated and deflated independently, two inflation channels 5 respectively connecting the first airbag 3 and the second airbag 4 can be provided, and an inflatable bag 6 is connected to the end of each inflation channel 5; it is also possible to set only one channel, but two inflation tubes 61 are installed in the channel, one inflation tube 61 is inserted into the first airbag 3, and the other inflation tube 61 is inserted into the second airbag 4, and the other ends of the two inflation tubes 61 are each connected to an inflatable bag 6.

[0031] The catheter body 1, the first airbag 3 and the second airbag 4 are made of soft plastics such as polyurethane, polyphosphate, polybutylene succinate, polylactic acid, carboxymethyl cellulose, polyvinyl chloride, polyethylene, polypropylene carbonate, styrene-butadiene-styrene copolymer or rubbers such as silica gel. The soft catheter body 1 has the possibility of being flattened after the airbag is inflated to a certain pressure, and once flattened, the ventilation effect will be greatly affected. A spring wire (not shown in the figure) is arranged in the tube wall of the catheter body 1 of the present embodiment, and the spring wire can make the catheter bend freely in the axial direction and keep the circle in the radial direction without being flattened. The specific setting position of the spring wire can be the part from the insertion part 11 to the part before the ventilator connector 2, and can also be arranged in the part from the front of the second airbag to the part before the ventilator connector 2.

[0032] like Figure 3As shown, the inflatable bag 6 includes an airbag bag 62 and a connecting pipe 63 located at the air inlet end of the airbag bag 62, and the end of the airbag bag 62 is connected to the inflation pipe 61. The inner wall of the connecting pipe 63 is provided with an upper stop ring 631 and a lower stop ring 632, a pressing column 633 is installed in the connecting pipe 63, a retaining ring 634 is provided in the middle of the pressing column 633, and a sealing gasket is installed on the retaining ring 634. The retaining ring 634 is located between the upper stop ring 631 and the lower stop ring 632, and a spring sleeved on the lower part of the pressing column 633 is installed between the retaining ring 634 and the lower stop ring 632, so that the sealing gasket on the pressing column 633 is pressed against the upper stop ring 631 under the elastic force of the spring, forming a self-sealing structure, and realizing the sealing of the connecting pipe 63 and the airbag part. When it is necessary to inflate the first airbag 3 and the second airbag 4, the front end of the needle tube is used to press down the pressing column 633, and the sealing pad moves down for ventilation. After the airbag is inflated, the natural seal is released, and the airbag will not leak. When it is necessary to inflate the airbag, a syringe or other inflation device is inserted into the connecting tube. Since there is no tight connection between the connecting tube and the syringe, the two are easy to fall off and difficult to operate. In this embodiment, a protrusion 635 is provided on the inner wall of the connecting tube of the airbag. When the syringe is inserted into the connecting tube, it can be fixed on the inflation tube due to the squeezing of the protrusion 635 and will not fall off. The protrusion 635 can be in the form of scattered dots or in the form of a ring.

[0033] The outer side of the tube wall of the catheter body 1 is also provided with scale lines, so that the insertion depth can be seen during the insertion process, which is convenient for operation.

[0034] The end of the catheter body 1 close to the ventilator connector 2 is provided with a bending structure. The distance between the starting part of the bending structure and the top end of the air outlet of the catheter body 1 is 0.68L-0.72L, where L is the length of the catheter body 1.

[0035] The structure of the bending portion can have various forms. For example, a certain curvature can be formed during the injection molding of the catheter body 1, so that the end of the catheter close to the ventilator connector 2 remains in a bent state. However, the curvature cannot be changed after being molded into a bent shape, and cannot be adjusted according to the individual conditions of the patient. The bending structure of this embodiment includes a deformable metal sheet 7, which is arranged in the side wall of the catheter body 1. The specific position of the metal sheet is that the front end (the end close to the air outlet end) of the metal sheet is 0.68L-0.72L away from the front end of the catheter body 1, and L is the length of the catheter body 1. According to the needs of the surgical operation and the actual situation of the patient, the medical staff can bend the deformable metal sheet 7 to keep the ventilator connector 2 away from the mouth, leaving enough space for the surgical operation. At the same time, it can prevent the catheter body 1 and the ventilator connector 2 from scratching the patient's nose wing, causing pain or discomfort to the patient.

[0036] In this embodiment, the inner and outer surfaces of the catheter body 1 are coated with a super-slip coating to reduce the friction coefficient of the inner and outer surfaces of the catheter. The super-slip coating is selected from one of medical-grade polyvinyl pyrrolidone, polyoxyethylene hydrophilic polymer, glycerol and polyethylene glycol.

[0037] Example 2

[0038] The structure of this embodiment is basically the same as that of embodiment 1, except that the bending structure is different. Figure 4 As shown, in this embodiment, the bending structure includes a fixing belt 8, one end of which is connected to the catheter body 1. The fixing method can be injection molding in the side wall of the catheter body 1, or it can be adhered to the side wall of the catheter body 1, or a retaining ring is set on the catheter body 1. The fixing belt 8 is set in a ring shape and is sleeved on the catheter body 1, and its position is fixed by the retaining ring. The catheter body 1 is provided with a fixing buckle 9 near the ventilator connector 2, and the fixing buckle 9 is L-shaped. By tying the free end of the fixing belt 8 to the fixing buckle 9 and adjusting the length appropriately, the part of the catheter near the ventilator connector 2 can be bent and a suitable curvature can be formed.

[0039] Example 3

[0040] The structure of this embodiment is basically the same as that of embodiment 1, except that the bending structure is different. The bending structure includes a corrugated telescopic tube sleeved on the end of the catheter body 1 near the ventilator connector. The catheter body 1 is formed into a curved structure through the plasticity of the corrugated telescopic tube, and its curvature and bending position can be adjusted at will. The corrugated telescopic tube can be made of plastic or metal, as long as it can be shaped.

[0041] The insertion part 11 of the front end of the double-airbag nasal ventilation catheter described in the above embodiment is provided with ventilation ports on both sides, so that the top of the insertion part 11 forms an arch bridge-shaped front end 13. When the ventilation catheter is inserted into the nasal cavity, the arch bridge-shaped front end 13 contacts the nasal cavity as the front end, and will not scratch the nasal mucosa; when the ventilation catheter enters a narrow part of the nasal cavity, the arch bridge-shaped front end 13 fits the flat structure of the nasal cavity, so that it can pass through the narrow position smoothly. The two ventilation ports in the trachea can ensure the ventilation volume of the left and right lungs and improve the ventilation effect.

[0042] In this embodiment, a suction hole connecting the inside and outside of the catheter body is provided on the catheter body between the first airbag 3 and the second airbag 4, preferably located near the first airbag 3; a suction channel connecting the suction hole is provided on the catheter body 1, and a connector is connected to the end of the suction channel through a pipeline. The connector can be a syringe insertion connector, through which sputum can be manually sucked, or a sputum suction device connector, through which a sputum suction device can be quickly connected, which is convenient for sucking sputum for patients during surgery.

[0043] The utility model is provided with double airbags. When the ventilation catheter is inserted into the nasal cavity, if the air outlet end of the catheter is curled, a sharp angle will be formed at the tortuous position, thereby causing scratches and damage to the piriform area of ​​the nasal septum, the middle turbinate and the inferior turbinate during the insertion process. At this time, inflating the first airbag to expand the nasal cavity space can make the air outlet end of the catheter recover its shape by elastic force, thereby preventing damage to the nasal mucosa. By adjusting the amount of gas in the first airbag, the end of the air outlet can be aligned with the glottis, thereby reducing glottis damage and improving the smoothness and convenience of tracheal intubation. After the second airbag is inflated, it is located at the turbinate and plays a fixing role, which can effectively prevent the ventilation catheter from falling out due to external forces.

[0044] The air inlet end of the double-balloon nasal ventilation catheter is provided with a bending structure. According to the needs of the surgical operation and the actual situation of the patient, the medical staff can use the bending structure to keep the ventilator connector away from the patient's mouth, leaving enough space for the surgical operation. At the same time, it can prevent the catheter body or the ventilator connector from rubbing against the patient's nose, causing pain or discomfort to the patient.

[0045] The double-balloon nasal ventilation catheter described in the utility model optimizes the performance and improves the technology of the common endotracheal intubation, expands the application scope of its indications, and is suitable for almost all types of difficult airway patients except nasal obstruction and congenital nasal occlusion, such as patients with snoring, ankylosing spondylitis, mucopolysaccharidosis, Mallampati grade III to IV, poor neck mobility, head and tongue hypertrophy, etc., who are difficult to intubate through the mouth, and general anesthesia surgery patients, and is particularly suitable for awake slow induction patients.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A double-balloon nasal ventilation catheter, comprising a catheter body, Features: The air inlet end of the catheter body is connected to a ventilator connector, and the air outlet end of the catheter body is provided with an arc-shaped insertion portion; both sides of the insertion portion are provided with vents so that the top of the insertion portion forms an arch bridge-shaped front end; The catheter body is provided with a first air bag at a position close to the air outlet end, and a second air bag is provided at the middle section of the catheter body; One end of the catheter body close to the ventilator connector is provided with a bending structure.

2. The double-balloon nasal ventilation catheter according to claim 1, Features: The bending structure includes a bending portion with a certain curvature injected into it or includes a deformable metal sheet arranged on the side wall of the catheter body.

3. The double-balloon nasal ventilation catheter according to claim 1, Features: The bending structure comprises a fixing belt, one end of which is connected to the catheter body, and a fixing buckle of the fixing belt is arranged near the ventilator joint of the catheter body.

4. The double-balloon nasal ventilation catheter according to claim 1, Features: The bending structure comprises a corrugated telescopic tube which is sleeved on the end of the catheter body close to the breathing machine connector.

5. The double-balloon nasal ventilation catheter according to claim 1, Features: The distance between the bending structure and the top end of the air outlet of the catheter body is 0.68L-0.72L, where L is the total length of the catheter body.

6. The double-balloon nasal ventilation catheter according to claim 1, Features: The distance between the second air bag and the top end of the air outlet end of the catheter body is 8.5 cm-19.5 cm.

7. The double-balloon nasal ventilation catheter according to claim 1, Features: The catheter body, the first airbag and the second airbag are all made of soft plastic or rubber, and the inner surface and / or outer surface of the catheter body are coated with a super-slip coating.

8. The double-balloon nasal ventilation catheter according to claim 1, Features: An inflation channel connecting the first airbag and the second airbag is arranged in the tube wall of the catheter body, and the end of the inflation channel is connected to the inflation bag. The inflation bag includes an airbag bag and a connecting pipe located at the air inlet end of the airbag bag, and the inner wall of the connecting pipe is provided with a protrusion.

9. The double-balloon nasal ventilation catheter according to claim 1, Features: A spring wire is arranged inside the tube wall of the catheter body.

10. The double-balloon nasal ventilation catheter according to claim 1, Features: The catheter body is in an arc shape as a whole, and a suction hole is arranged on the outer back side of the arc between the first airbag and the second airbag and close to the first cuff. A suction channel connected to the suction hole is arranged on the catheter body, and the end of the suction channel is connected to the connector.

Images