Nasal endotracheal catheter

Abstract

The utility model provides a transnasal endotracheal catheter, and belongs to the technical field of medical catheters. Comprising a connecting pipe and a guide pipe body, the bottom of the connecting pipe is fixedly connected with the guide pipe body with the angle of 55 degrees in the natural state, and four sets of pipelines are installed in the guide pipe body. The three pipelines are respectively an anesthetic feeding pipeline, a flushing pipeline, a camera connecting line pipeline and an air duct for the air bag. Through cooperative use of all structures in the buffer assembly, the buffer assembly can be folded in the storage groove in the outer wall of the catheter body and stably attached to the outer wall of the air bag body when the buffer assembly is not used, the buffer assembly cannot be affected by external substances in the intubation process, meanwhile, the advancing difficulty of the catheter body cannot be increased, and the service life of the catheter body is prolonged. The catheter main body can enter the nose in a flow way, and the hemostatic cotton body and the medicine in the cavity are matched for use, so that bleeding stopping and medicine applying can be quickly carried out on the bleeding part by means of the bulging and unfolding force of the air bag body.

Description

Technical Field

[0001] The utility model relates to the technical field of medical catheters, and particularly relates to a nasal endotracheal catheter. Background Art

[0002] Nasal endotracheal intubation is a commonly used method during oral and maxillofacial, otolaryngology or plastic surgery under general anesthesia. The biggest advantage is that it does not interfere with the surgical field of the surgeon. Compared with oral endotracheal intubation, nasal endotracheal intubation stimulates the pharyngeal reflex less, and conscious patients are often more tolerant. Therefore, for patients with a high risk of regurgitation and aspiration or limited head extension, nasal intubation can also be selected for awake intubation. At the same time, during blind intubation, video laryngoscope intubation and flexible fiberoptic bronchoscope intubation, the success rate of nasal intubation is higher.

[0003] However, the most common complication during nasal endotracheal intubation is epistaxis. Since the passage through the nasal cavity is blind and routine nasal endoscopy is not performed, the incidence of epistaxis ranges from 9.6% to 70%. Even if both nostrils are unobstructed, the incidence is as high as 44.4%. Existing hemostasis methods include the application of mucosal vasoconstrictors, special tracheal catheters, gastric tubes or suction catheters for guidance, and the use of heated softening tubes, but these methods cannot completely prevent epistaxis.

[0004] When existing tracheal intubation is used, if epistaxis occurs, it will not only cause pain and discomfort to the patient, but also, if the bleeding site is not quickly stopped in time, the blood will not only contaminate the camera and cause visual field obstruction, but also part of the blood will flow out of the nasal cavity and adhere to the patient's face, further aggravating the patient's discomfort. Moreover, medical staff need to perform additional operations to clean the face, making the entire operation process more troublesome. Therefore, the present application provides a nasal endotracheal catheter to meet the needs. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a nasal endotracheal catheter to solve the problem of easy bleeding during existing nasal endotracheal intubation.

[0006] To solve the above technical problem, the utility model provides the following technical solution:

[0007] A nasal endotracheal catheter includes a connecting tube and a catheter body. The bottom of the connecting tube is fixedly connected to the catheter body with an angle of 55 degrees in the natural state. Four groups of pipelines are installed in the catheter body, namely an anesthetic pipeline, a flushing pipeline, a camera connection line pipeline, and an air vent pipeline for the airbag. The air vent pipeline is connected to the airbag body; a deployment mechanism for exposing hemostatic articles, and the deployment mechanism is connected to the catheter body.

[0008] Optionally, the unfolding mechanism includes a wrapping film installed on the outer wall of the catheter body. A first connecting strip is fixedly connected to the outer wall of the catheter body, and second connecting strips adapted to the first connecting strip are fixedly connected to both sides of the inner wall of the wrapping film.

[0009] Optionally, the wrapping film is a medical waterproof and breathable film made of polytetrafluoroethylene. In the second usage state, its bottom is corrugated and folded on the outer wall of the airbag body.

[0010] Optionally, in the second usage state, the cross-section of the wrapping film is U-shaped with one end closed and one end open. A fourth connecting strip is fixedly connected to one end of the opening of the wrapping film away from the center position of the catheter body, and a fifth connecting strip adapted to the fourth connecting strip is fixedly connected to the corresponding position of the catheter body.

[0011] Optionally, the cross-sections of the fourth connecting strip and the fifth connecting strip are serrated in both usage states.

[0012] Optionally, a hemostatic cotton body fixedly connected to its bottom is installed inside the wrapping film. In the second usage state, the hemostatic cotton body is corrugated and folded in the storage cavity formed by the wrapping film. The hemostatic cotton body is a medical hemostatic cotton made of regenerated oxidized cellulose.

[0013] Optionally, a medicine sac film made of the same material as the wrapping film is provided at one end of the wrapping film away from the center position of the catheter body. In the second usage state, the cross-section of the side of the medicine sac film away from the hemostatic cotton body is symmetrically arranged in two groups of S shapes. A third connecting strip is fixedly connected to the interface of the medicine sac film, and a cavity is formed inside the medicine sac film.

[0014] Optionally, the cross-section of the first connecting strip fixedly connected to the outer wall of the catheter body is positively serrated in the second usage state, and the cross-section of the second connecting strip connected to the wrapping film is negatively serrated in the second usage state.

[0015] Optionally, the cross-section of the third connecting strip is serrated in the second usage state.

[0016] Optionally, a liquid hemostatic drug is stored in the cavity. A connecting band is fixedly connected to the outer wall of the wrapping film. A wire made of polyester fiber is fixedly connected to the side of the connecting band away from the wrapping film. A groove adapted to the unfolding mechanism is provided at the bottom of the catheter body.

[0017] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0018] In the above solution, when the airbag body is ventilated and inflated by setting up the unfolding mechanism, the wrapping film thereon is driven to unfold. During this process, the internal corrugations of the wrapping film are naturally unfolded under force, while the outside of the wrapping film is affected by tension, causing the fourth connecting strip and the fifth connecting strip with the smallest tensile strength at one end to separate from each other, so that the hemostatic cotton body is exposed for use. At the same time when the airbag body is inflated, the hemostatic cotton body undergoes the same deformation. At the moment when the wrapping film is opened, the hemostatic cotton body fits the bleeding opening, squeezes the bleeding opening and adsorbs the blood inside. This structure can immediately provide corresponding protection when unexpected bleeding occurs during the intubation process.

[0019] Through the wrapping film arranged in the unfolding mechanism, other mechanisms inside the wrapping film can be prevented from being affected by the liquid in the nasal cavity during the intubation process, so that the hemostatic cotton body can always be attached to the surface of the airbag body in a compressed state. This structure ensures that the unfolding mechanism has good sealing performance during the intubation process.

[0020] By arranging structures such as the first connecting strip, the second connecting strip, the fourth connecting strip and the fifth connecting strip in the unfolding mechanism, when the airbag body is inflated, the fourth connecting strip and the fifth connecting strip can be separated from each other, while the first connecting strip and the second connecting strip remain in their original states. And by making the tooth density and thickness of the first connecting strip and the second connecting strip greater than the tooth density and spacing between the fourth connecting strip and the fifth connecting strip respectively, it is further ensured that the first connecting strip and the second connecting strip will not be separated by the acting force of the inflation of the airbag body. This structure effectively makes the unfolding mechanism more stable when unfolding.

[0021] By arranging structures such as the medicine bag film and the cavity in the unfolding mechanism, when the airbag body is inflated, the medicine bag film is forced to unfold. At the same time, when the interface of the medicine bag film is opened when the airbag body is nearly fully inflated, the medicine in the cavity just adheres to the wound, achieving the effect of precise medicine application.

[0022] By using the cooperation of each structure in the buffer assembly, the buffer assembly can be retracted into the storage groove on the outer wall of the catheter main body and stably attached to the outer wall of the airbag body when not in use, without being affected by external substances during the intubation process, and at the same time without increasing the difficulty of the catheter main body advancing, so that the catheter main body can smoothly enter the nose. And through the cooperation of the hemostatic cotton body and the medicine in the cavity, by borrowing the force of the inflation and unfolding of the airbag body, it can quickly stop bleeding and apply medicine to the bleeding area, effectively solving the problem of easy bleeding during nasal tracheal intubation, and the structure is simple and convenient to use. Description of the Drawings

[0023] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0024] Figure 1 Schematic three-dimensional structure diagram of the first usage state of the nasotracheal catheter;

[0025] Figure 2 Schematic three-dimensional structure diagram of the first usage state with a mating cross-section of the nasotracheal catheter;

[0026] Figure 3 It is Figure 2 Enlarged structure diagram at position A in

[0027] Figure 4 It is Figure 3 Enlarged structure diagram at position B in

[0028] Figure 5 Schematic three-dimensional structure diagram of the second usage state of the nasotracheal catheter;

[0029] Figure 6 Schematic three-dimensional structure diagram of the second usage state with a mating cross-section of the nasotracheal catheter;

[0030] Figure 7 It is Figure 6 Enlarged structure diagram at position C in

[0031] Figure 8 It is Figure 6 Enlarged structure diagram at position D in

[0032] Figure 9 It is Figure 8 Enlarged structure diagram at position E in

[0033] Figure 10 It is Figure 8 Enlarged structure diagram at position F in

[0034] Figure 11 It is Figure 6 Enlarged structure diagram at position G in

[0035] [Reference Signs]

[0036] 1. Connecting tube; 2. Catheter body; 3. Lens body; 4. Airbag body; 5. Wrapping film; 6. Hemostatic cotton body; 7. Medicine sac film; 8. Connecting band; 9. Pull wire; 10. First connecting strip; 11. Second connecting strip; 12. Third connecting strip; 13. Cavity; 14. Fourth connecting strip; 15. Fifth connecting strip.

[0037] As shown in the figure, in order to clearly show the structure of the embodiments of the present utility model, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present utility model to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed Description of the Embodiments

[0038] The following describes in detail a nasal endotracheal tube provided by the present utility model in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present utility model.

[0039] It should be noted that in the specification, references to "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining embodiments to describe specific features, structures, or characteristics, it should be within the knowledge of those skilled in the relevant art to implement such features, structures, or characteristics in combination with other embodiments, whether or not explicitly described.

[0040] Generally, terms can be understood at least in part from their use in context. For example, at least in part depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that may not be explicitly described.

[0041] It can be understood that the meanings of "on", "above", and "over" in the present utility model should be interpreted in the broadest manner, such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0042] In addition, spatial relative terms such as "under", "below", "lower part", "above", "upper part", etc. may be used in this text for convenience of description to describe the relationship between one element or feature and another or more elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device other than the orientation depicted in the drawings. The device may be oriented in other ways, and the spatial relative descriptive terms used herein may be correspondingly interpreted similarly.

[0043] As Figures 1 to 11 shown, an embodiment of the present utility model provides a nasal endotracheal catheter, which includes a connecting tube 1 and a catheter body 2. The bottom of the connecting tube 1 is fixedly connected to the catheter body 2 with an angle of fifty-five degrees in the natural state. Four groups of pipelines are installed in the catheter body 2, namely an anesthetic supply pipeline, a flushing pipeline, a camera connection line pipeline, and an air vent pipeline for the airbag. The air vent pipeline is connected to the airbag body 4; a deployment mechanism, which is used to expose the hemostatic article, and the deployment mechanism is connected to the catheter body 2. By providing a deployment mechanism adapted to the groove at the lower end of the catheter body 2, the device can be quickly deployed by relying on the tension of the inflated airbag body 4, quickly press the hemostatic cotton body 6 against the bleeding site, and squeeze the wound. At the same time, the medicine capsule film 7 provided on the hemostatic cotton body 6 is pulled open, so that the medicine in the cavity 13 is applied to the wound at the same time, effectively solving the problem that the existing device not only causes discomfort to the patient during use, and if hemostasis is not performed quickly in time, the blood will flow out of the nasal cavity and adhere to the patient's face, further aggravating the discomfort of the patient, and also requiring additional cleaning operations by medical staff on the face, making the entire operation process more troublesome. And the entire operation can deploy the device without applying external force to the deployment mechanism, which is convenient and fast to use, and improves the working efficiency of intubation to a certain extent.

[0044] As Figures 1 to 11As shown in the figure, the unfolding mechanism includes a wrapping film 5 installed on the outer wall of the catheter body 2. A first connecting strip 10 is fixedly connected to the outer wall of the catheter body 2. Two sides of the inner wall of the wrapping film 5 are fixedly connected with second connecting strips 11 adapted to the first connecting strip 10. The wrapping film 5 is a medical waterproof and breathable film made of tetrafluoroethylene material. The bottom of the wrapping film 5 is corrugated and folded on the outer wall of the airbag body 4 in the second use state. The cross-section of the wrapping film 5 in the second use state is U-shaped with one end closed and one end open. One end of the opening of the wrapping film 5 away from the center of the catheter body 2 is fixedly connected with a fourth connecting strip 14. A fifth connecting strip 15 adapted to the fourth connecting strip 14 is fixedly connected to the corresponding position of the catheter body 2 and the fourth connecting strip 14. The cross-sections of the fourth connecting strip 14 and the fifth connecting strip 15 in both use states are serrated. A hemostatic cotton body 6 fixedly connected to its bottom is installed in the wrapping film 5. The hemostatic cotton body 6 is corrugated and folded and retracted in the storage cavity formed by the wrapping film 5 in the second use state. The hemostatic cotton body 6 is a medical hemostatic cotton made of regenerated oxidized cellulose material.

[0045] Completely wrapping the hemostatic cotton body 6 with the wrapping film 5 can effectively prevent the hemostatic cotton body 6 from being affected by nasal tissue fluid or other secretions during the intubation process. Moreover, one inner wall of the hemostatic cotton body 6 is fixedly connected to one inner wall of the wrapping film 5, so that the hemostatic cotton body 6 can be pulled out of the nasal cavity together with the wrapping film 5 after use, thus preventing the problem that the hemostatic cotton body 6 remains in the nasal cavity after use and causes discomfort to the patient. In addition, the other inner wall of the wrapping film 5 is not connected to the hemostatic cotton body 6, so that it will not affect the position of the hemostatic cotton body 6 when it is unfolded. The outer wall of the hemostatic cotton body 6 is connected to the first connecting strip 10 on the catheter body 2 through the second connecting strips 11 at both ends of it, and its outer wall is in contact with but not connected to the outer wall of the airbag body 4.

[0046] In terms of material use, Etamsylate Injection is a commonly used hemostatic drug. Its main ingredient, etamsylate, can enhance the resistance of capillaries and reduce their permeability. Therefore, this drug can help capillaries better resist external pressure and prevent blood from leaking out of the blood vessels. It can effectively prevent and control bleeding at the surgical site. For patients with poor platelet function or fragile blood vessels prone to bleeding, Etamsylate Injection can also play a hemostatic role. Moreover, the high molecular compound formed by the polymerization of tetrafluoroethylene has excellent chemical stability and corrosion resistance. And regenerated oxidized cellulose not only stops bleeding quickly, that is, the Surgicel hemostatic gauze acts as a hemostatic matrix, coagulating blood clots and accelerating the hemostasis process. Its efficacy does not depend on the normal coagulation mechanism in the human body. Surgicel is very effective in controlling bleeding from small blood vessels, and Surgicel can be left in the body. It can be completely absorbed usually within 7 - 10 days, which is faster than other hemostatic products, with almost no tissue reaction, and there are no reports of toxicity, allergic reactions, and rejection reactions. Its structure is not only simple, but also has good stability and safety, further making the use effect of the device better.

[0047] As Figures 1 to 11 shown, one end of the wrapping film 5 far from the central position of the catheter body 2 is provided with a medicine sac film 7 made of the same material as the wrapping film 5. The cross-section of the medicine sac film 7 on the side far from the hemostatic cotton body 6 in the second use state is symmetrically arranged in two groups of S shapes. A third connecting strip 12 is fixedly connected at the interface of the medicine sac film 7. A cavity 13 is formed inside the medicine sac film 7. The cross-section of the first connecting strip 10 fixedly connected to the outer wall of the catheter body 2 in the second use state is a positive sawtooth shape. The density and thickness of the teeth of the first connecting strip 10 and the second connecting strip 11 are greater than the density and thickness of the teeth of the fourth connecting strip 14 and the fifth connecting strip 15. The cross-section of the second connecting strip 11 connected to the wrapping film 5 in the second use state is a negative sawtooth shape, and the cross-section of the third connecting strip 12 in the second use state is a sawtooth shape. The density of the teeth of the third connecting strip 12 is greater than the density of the teeth of the fourth connecting strip 14 and the fifth connecting strip 15.

[0048] A liquid hemostatic drug is stored in the cavity 13. A connecting belt 8 is fixedly connected to the outer wall of the wrapping film 5. A drawing wire 9 made of polyester fiber material is fixedly connected to the side of the connecting belt 8 far from the wrapping film 5. A groove adapted to the unfolding mechanism is provided at the bottom of the catheter body 2. The inner wall end of the medicine sac film 7 is fixedly connected to the outer wall of the hemostatic cotton body 6. The upper end of the medicine sac film 7 is attached to but not connected to the wrapping film 5. One side of the cavity 13 is formed by the hemostatic cotton body 6, and the other side is formed by the medicine sac film 7. The two cooperate to form a sealed cavity 13. Except for the connecting belt 8 and the drawing wire 9, all the structures provided at the groove of the catheter body 2 are used in a circular shape around the outside of the catheter body 2. And the connecting belt 8 is in a Y shape, with one end fixedly connected to the drawing wire 9 and the other two ends fixedly connected to the wrapping film 5.

[0049] The medicine sac film 7 can provide sealed protection for the medicine in the cavity 13, preventing the medicine from being affected by external interference during non-use and affecting the performance of the medicine. By differentiating the connection density and width between the fourth connecting strip 14, the fifth connecting strip 15 and the first connecting strip 10 and the second connecting strip 11, when the wrapping film 5 is in use, its opening will break first. Then, when the connecting belt 8 is pulled after use and the wrapping film 5 is subjected to an outward pulling force, the first connecting strip 10 and the second connecting strip 11 will be separated under the action of the pulling force, facilitating the removal of structures such as the wrapping film 5, the hemostatic cotton body 6, and the medicine sac film 7 from the nasal cavity along the guide of the drawing wire 9. Moreover, the device can quickly stop the bleeding at the bleeding site in the nasal cavity by cooperating with extrusion, blood absorption, and drug hemostasis, effectively solving the problems existing in the existing device, and having a simple structure and being convenient and fast to operate and use.

[0050] The working principle of the technical solution provided by the present utility model is as follows:

[0051] During use, first place the catheter main body 2 in a natural state. Insert the catheter main body 2 from the nostril at the best angle according to the shape of the catheter main body 2. The lens body 3 is located at the bottom end of the catheter main body 2 to facilitate real-time observation of the advancing direction of the catheter and the internal structure of the nasal cavity, as well as whether there is a problem of nasal bleeding. During the insertion of the catheter main body 2, the drawing wire 9 enters the nasal cavity along with the catheter main body 2. When the lens body 3 observes nasal bleeding, immediately stop the advancement of the catheter main body 2. When inflating the airbag body 4, the airbag body 4 expands rapidly. During this period, one end of the opening of the wrapping film 5 is affected by the tension, and the fourth connecting strip 14 fixedly connected to one side of it is separated from the fifth connecting strip 15 fixedly connected to the outer wall of the catheter main body 2, causing the wrapping film 5 to shrink in the direction of the closed part of the original wrapping film 5 under the influence of the pulling force on the other side, exposing the hemostatic cotton body 6. At the same time, the hemostatic cotton body 6 is affected by the tension and expands simultaneously with the airbag body 4. At the same time, the medicine sac film 7 at the upper end of the hemostatic cotton body 6 is affected by the tension. Its originally S-shaped curved surface first unfolds. Under the influence of the continuously increasing tension, after reaching the designated position, the connection part of the medicine sac film 7 is subjected to a pulling force, causing the two groups of third connecting strips 12 to unfold, exposing the cavity 13, and applying the medicine in the cavity 13 to the wound. At the same time, the airbag body 4 expands completely, fitting the hemostatic cotton body 6 to the wound, and at the same time causing the hemostatic cotton body 6 to exert a slight squeezing force on the wound.

[0052] This device not only has a simple structure but also is fast and convenient to use. The wound can be treated quickly and accurately, reducing the discomfort of the patient. After hemostasis is completed, deflate the airbag body 4, pull the drawing wire 9 from the outside, cause the drawing wire 9 to drive the connecting belt 8 to move, and cause the connecting belt 8 to drive the wrapping film 5 and the hemostatic cotton body 6 fixedly connected thereto and other mechanisms to be pulled out of the nasal cavity along the guide of the drawing wire 9 under the influence of the pulling force. Subsequently, the catheter main body 2 continues to be inserted.

Claims

1. A nasal endotracheal tube, characterized in that, It includes a connecting pipe and a catheter body. The bottom of the connecting pipe is fixedly connected to the catheter body with an angle of 55 degrees in the natural state. Four groups of pipelines are installed in the catheter body, namely the anesthetic supply pipeline, the flushing pipeline, the camera connection line pipeline, and the ventilation pipeline for the airbag. An airbag body is fixedly connected to the ventilation pipeline. It also includes two usage states. The first usage state is that all components are expanded and deployed on the catheter body, and the second usage state is that all components are folded and stored on the catheter body. An unfolding mechanism, which is used to expose the hemostatic articles and is connected to the catheter body.

2. The nasal endotracheal tube according to claim 1, characterized in that, The unfolding mechanism includes a wrapping film installed on the outer wall of the catheter body. A first connecting strip is fixedly connected to the outer wall of the catheter body. Second connecting strips with shapes adapted to the first connecting strip are fixedly connected to both sides of the inner wall of the wrapping film.

3. The nasal endotracheal tube according to claim 2, wherein, The wrapping film is a medical waterproof and breathable film made of polytetrafluoroethylene. In the second usage state, its bottom is corrugated and folded on the outer wall of the airbag body.

4. The nasal endotracheal catheter according to claim 2, characterized in that, In the second usage state, the cross-section of the wrapping film is U-shaped with one end closed and one end open. One end of the opening of the wrapping film, which is far from the center of the catheter body, is fixedly connected to a fourth connecting strip, and a fifth connecting strip is fixedly connected to the outer wall of the catheter body.

5. The nasal endotracheal catheter according to claim 4, characterized in that, The cross-sections of the fourth connecting strip and the fifth connecting strip are serrated in both usage states.

6. The nasal endotracheal tube according to claim 2, characterized in that, The bottom of the wrapping film is fixedly connected to a hemostatic cotton body. In the second usage state, the hemostatic cotton body is corrugated and folded and stored in the storage cavity formed by the wrapping film. The hemostatic cotton body is a medical hemostatic cotton made of regenerated oxidized cellulose.

7. The nasal endotracheal tube according to claim 2, characterized in that, One end of the wrapping film, which is far from the center of the catheter body, is provided with a medicine sac film made of the same material as the wrapping film. In the second usage state, the cross-section on the side of the medicine sac film away from the hemostatic cotton body is symmetrically arranged in two groups of S shapes. A third connecting strip is fixedly connected to the interface of the medicine sac film, and a cavity is provided in the medicine sac film.

8. The nasal endotracheal tube according to claim 2, wherein The cross-section of the first connecting strip is positively serrated in the second usage state, and the cross-section of the second connecting strip is negatively serrated in the second usage state.

9. The nasal endotracheal tube according to claim 7, characterized in that, The cross-section of the third connecting strip is serrated in the second usage state.

10. The nasal endotracheal tube according to claim 7, characterized in that, A liquid hemostatic drug is stored in the cavity. A connecting belt is fixedly connected to the outer wall of the wrapping film. A wire made of polyester fiber is fixedly connected to the side of the connecting belt away from the wrapping film. A groove adapted to the unfolding mechanism is provided at the bottom of the catheter body.

Images