Disposable multifunctional nasogastric tube

Abstract

The application discloses a disposable multifunctional nasogastric tube, which comprises a guide sleeve and a combined feeding tube with a length greater than the guide sleeve, and the end surface of the combined feeding tube is provided with a side hole; the end of the guide sleeve is provided with an outer tube connecting seat, the end of the combined feeding tube penetrating through the end of the outer tube connecting seat is connected with a luer lock connector; and a flip cover assembly is connected to the outer wall of the outer tube connecting seat, wherein the combined feeding tube comprises at least two independent pipe bodies for conveying nutrient substances or performing negative pressure extraction work. The application is characterized in that the guide sleeve is used for fixing the guiding cavity from the nasal cavity to the throat part, the combined feeding tube penetrates into the esophagus from the guide sleeve and enters the stomach or the intestinal tract position, and the pain of the patient caused by repeated intubation is reduced. The combined feeding tube has two pipe bodies with conveying functions, so that the treatment measures for the stomach or the intestinal tract part can be realized according to the length of the deep pipe body, and the implementation of the synchronous treatment measures for the complications is realized.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a disposable multifunctional nasogastric tube. Background Technology

[0002] A nasogastric tube is a commonly used medical device primarily used to maintain a patient's nutritional and hydration intake, as well as to administer intravenous fluid therapy. It is particularly important for patients who are unable to eat or have been fasting for extended periods, such as those experiencing loss of consciousness, coma, or hypotension. Intravenous fluid therapy via a nasogastric tube is also a common treatment method, providing essential nutrients and fluids, and can also help manage complications arising from certain conditions or procedures.

[0003] Most existing disposable nasogastric tubes have only one delivery chamber, which means that they can only perform one treatment procedure at a time, such as the delivery of nutrients, water, or intravenous infusion. They can only be used to manage complications one by one, and cannot simultaneously treat multiple complications in patients. Summary of the Invention

[0004] The purpose of this invention is to provide a disposable multifunctional nasogastric tube to solve the technical problem that existing disposable nasogastric tubes cannot meet the treatment needs of patients with multiple concurrent diseases during nasogastric tube treatment.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0006] A disposable multifunctional nasogastric tube includes a guide sleeve and a combined feeding tube with a length greater than the guide sleeve. The combined feeding tube is sleeved with the guide sleeve, and one end of the combined feeding tube and the guide sleeve are aligned. A side hole is provided on the end surface of the combined feeding tube away from the guide sleeve.

[0007] The end of the guide sleeve is provided with an outer tube connector, and the end of the combined feed tube that extends out of the outer tube connector is connected to a Luer locking connector.

[0008] A flip-top assembly is connected to the outer wall of the outer tube connector. The flip-top assembly is used to cooperate with the end opening of the outer tube connector and to seal the end opening.

[0009] The combined feeding tube includes at least two independent tubes for delivering nutrients or performing negative pressure extraction.

[0010] As a preferred embodiment of the present invention, the outer tube connector includes a sleeve fitted onto the connection between the combined feed tube and the Luer locking connector. The end of the sleeve facing the Luer locking connector is connected to a frustum-shaped cavity tube. The frustum-shaped cavity tube has an inner cavity. An air outlet micro-hole is provided at the connection between the sleeve and the frustum-shaped cavity tube. The inner cavity communicates with the air outlet micro-hole. An air inlet terminal is provided on the outer wall of the frustum-shaped cavity tube.

[0011] As a preferred embodiment of the present invention, the combined feeding tube includes a first cavity tube and a second cavity tube, the first cavity tube and the second cavity tube being combined to form a cylindrical cavity.

[0012] As a preferred embodiment of the present invention, the air intake terminal includes a fixed sleeve mounted on the frustum cavity tube and a needle tube mounted inside the fixed sleeve. The bottom of the needle tube protrudes from the bottom of the fixed sleeve and enters the inner cavity. The outer wall of the needle tube is sealed to the inner wall of the fixed sleeve. Under the action of external force, the needle tube can move axially along the fixed sleeve to pierce the inner wall of the inner cavity and the first cavity tube.

[0013] As a preferred embodiment of the present invention, the first cavity tube is provided with a thin ring for the needle tube to puncture, and the thin ring is located on the tube body of the first cavity tube inside the guide sleeve.

[0014] As a preferred embodiment of the present invention, the first cavity tube is a hollow cylinder, and the second cavity tube is provided with a concave guide groove for mounting the first cavity tube along the length direction of the second cavity tube.

[0015] As a preferred embodiment of the present invention, a wedge-shaped guide seat is provided on the inner wall of the first cavity tube and the second cavity tube below the side hole, and a guide cone hole is provided on the surface of the wedge-shaped guide seat facing the direction in which the guide wire enters.

[0016] As a preferred embodiment of the present invention, the guide wire includes a rigid main body segment and a flexible deformable segment connected to the end of the rigid main body segment;

[0017] Specifically, when a force is applied along the length of the rigid main body segment, the end of the flexible deformable segment bends after contacting the guide cone hole of the wedge-shaped guide seat.

[0018] As a preferred embodiment of the present invention, the flip-top assembly includes a cover body, which is connected to the outer tube connector via a connector. The cover body is provided with two wedge plugs corresponding to the Luer locking joints of the combined feed tube body, and the cover body is provided with two through holes for installing the wedge plugs. The diameter of the through holes is smaller than the outer diameter of the combined feed tube body.

[0019] As a preferred embodiment of the present invention, the length of the guide cannula includes the length from the nasal cavity to the pharynx.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The present invention addresses the issue of repetitive intubation by using a guiding cannula to fix a guide cavity from the nasal cavity to the pharynx. A combined feeding tube is then inserted through the guiding cannula into the esophagus and into the stomach or intestines, thus reducing patient discomfort. The combined feeding tube has two delivery tubes, allowing for treatment of the stomach or intestines depending on the depth of the tube. Furthermore, it can be inserted into the lungs from the trachea to perform pulmonary intubation, enabling simultaneous treatment of complications. Attached Figure Description

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the longitudinal section structure of the air intake terminal according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the flip cover assembly according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of a wedge-shaped guide seat structure according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the deformation of the flexible deformation segment under the guidance of the wedge-shaped guide seat according to an embodiment of the present invention;

[0028] Figure 6 This is a longitudinal cross-sectional structural diagram of one embodiment of the first cavity tube and the second cavity tube of the present invention;

[0029] Figure 7 This is a schematic diagram of the longitudinal section structure of another embodiment of the first cavity tube and the second cavity tube of the present invention;

[0030] Figure 8 This is a schematic diagram of the longitudinal section of the outer tube connector according to an embodiment of the present invention.

[0031] The labels in the diagram represent the following:

[0032] 1-Guide sleeve; 2-Combined feed tube; 3-Side hole; 4-Outer tube connector; 5-Luer locking connector; 6-Flip cover assembly; 7-End opening; 8-Concave guide groove; 9-Wedge-shaped guide seat; 10-Guide cone hole; 11-Guide wire;

[0033] 111 - Rigid main body segment; 112 - Flexible deformation segment;

[0034] 21-First cavity tube; 22-Second cavity tube;

[0035] 41-Sleeve; 42-Frustum cavity tube; 43-Inner cavity; 44-Outlet micro-hole; 45-Inlet terminal; 46-Fixing sleeve; 47-Needle tube; 48-Thin ring;

[0036] 61-Cover body; 62-Wedge plug; 63-Through hole. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 8 As shown, the present invention provides a disposable multifunctional nasogastric tube, including a guide tube 1 and a combined feeding tube 2 with a length greater than that of the guide tube 1. The combined feeding tube 2 is sleeved with the guide tube 1, and one end of the combined feeding tube 2 and the guide tube 1 are consistent. A side hole 3 is provided on the end surface of the combined feeding tube 2 away from the guide tube 1.

[0039] The end of the guide sleeve 1 is provided with an outer tube connector 4, and the end of the combined feed tube 2 extends out of the end of the outer tube connector 4 and is connected to a Luer locking connector 5.

[0040] A flip cover assembly 6 is connected to the outer wall of the outer tube connector 4. The flip cover assembly 6 is used to cooperate with the end opening 7 of the outer tube connector 4 and to seal the end opening 7.

[0041] The combined feeding tube 2 includes at least two independent tubes for transporting nutrients or performing negative pressure extraction. Specifically, taking two tubes as an example, the combined feeding tube 2 includes a first cavity tube 21 and a second cavity tube 22, which combine to form a cylindrical cavity. Figure 6 and Figure 7 As shown. Because the diameter of the nasogastric tube itself is not very large, dividing it into too many independent tubes will affect its normal function.

[0042] For example, in the treatment of lung infections that occur during nasogastric or intravenous feeding, including oxygen supply and sputum absorption, and since the nasogastric tube occupies the nasal cavity, it is usually necessary to remove the nasogastric tube before oxygen supply or treatment in other areas can be administered.

[0043] Using multiple tubes simultaneously is obviously one way to solve the problem. However, multiple tubes present the problem of more complicated intubation procedures and simultaneous pressure on the patient's nasal cavity and esophagus, making the treatment process more painful for the patient.

[0044] Therefore, the present invention solves the above-mentioned problems by using a shorter guide sleeve 1 to guide and fix the combined feeding tube 2.

[0045] Specifically, the area from the nasal cavity to the pharynx is typically the most difficult part of nasogastric tube intubation, often requiring the assistance of adjuvant medications to achieve a successful procedure. Therefore, in managing multiple complications, repeated intubation can obviously cause significant suffering for patients.

[0046] The present invention is to fix the part by means of a guide tube 1, and then combine the feeding tube 2 to pass through the guide tube 1 into the esophagus and into the stomach or intestine, thereby solving the problem of repeated intubation and reducing the patient's pain.

[0047] Therefore, the length of the guiding cannula 1 needs to be designed to include the distance from the nasal cavity to the esophagus. The length of the combined feeding tube 2 can be selected according to the specific treatment method.

[0048] Because the combined feeding tube has two delivery tubes, treatment measures can be performed on the stomach or intestines depending on the length of the tube, and the tube can be inserted into the lungs from the trachea to perform pulmonary intubation.

[0049] When inserting a nasogastric tube, the tube occupies space in the nasal cavity, reducing the amount of oxygen the patient receives during breathing. Obviously, if the patient has complications such as difficulty breathing, nasogastric tube feeding cannot guarantee oxygen supply, causing the patient great discomfort.

[0050] Therefore, such as Figure 1 and Figure 8As shown, since the outer tube connector 4 in this invention is located in the nasal cavity, it is desirable that the outer tube connector 4 can also perform oxygen supply operations when the combined feeding tube 2 is used for nasal feeding. The outer tube connector 4 includes a sleeve 41 that is sleeved at the connection between the combined feeding tube 2 and the Luer locking connector 5. The end of the sleeve 41 facing the Luer locking connector 5 is connected to a frustum cavity tube 42. The frustum cavity tube 42 is provided with an inner cavity 43. An air outlet microhole 44 is provided at the connection between the sleeve 41 and the frustum cavity tube 42. The inner cavity 43 communicates with the air outlet microhole 44. An air inlet terminal 45 is provided on the outer wall of the frustum cavity tube 42.

[0051] The specific functions of the outer tube connector 4 in this invention include oxygen supply (the proportion of oxygen in the input gas is determined according to different patient complications), and the specific working method of the air inlet terminal 45 of the outer tube connector 4, wherein during oxygen supply, the connection between the frustum-shaped cavity tube 42 and the sleeve 41 of the outer tube connector 4 enters the nasal cavity), and its oxygen supply methods include two types:

[0052] First, in cases where the patient is able to breathe independently but requires oxygen supply, the intake terminal 45 only needs to be connected to the oxygen supply pipe, and oxygen enters the nasal cavity through the exhaust micro-hole 44 to achieve oxygen supply.

[0053] Secondly, in cases where a patient requires emergency oxygen supply and their spontaneous breathing is weakened, the end of the first cavity tube 21 or the second cavity tube 22 with the side hole 3 needs to be delivered to the lungs through the airway for direct oxygen supply. In the current process, the nasogastric tube needs to be removed first, or an oxygen mask needs to be applied directly. However, the presence of the nasogastric tube limits the fit between the oxygen mask and the patient's face.

[0054] The oxygen supply method provided by this invention can quickly address respiratory problems that occur in patients during nasogastric feeding.

[0055] Furthermore, when a patient has a lung infection and thick sputum, suctioning can be performed through the first cavity tube 21 or the second cavity tube 22, which are inserted into the pulmonary duct.

[0056] Therefore, in order to facilitate convenient switching between the two oxygen supply modes, the present invention provides a specific embodiment of the air inlet terminal 45:

[0057] It includes a fixed sleeve 46 installed on the frustum cavity tube 42 and a needle tube 47 installed inside the fixed sleeve 46. The bottom of the needle tube 47 protrudes from the bottom of the fixed sleeve 46 and enters the inner cavity 43. The outer wall of the needle tube 47 is sealed to the inner wall of the fixed sleeve 46. Under the action of external force, the needle tube 47 can move axially along the fixed sleeve 46 to puncture the inner wall of the inner cavity 43 and the first cavity tube 21.

[0058] Of course, because a puncture method is used, there is a possibility of over-puncture, that is, when the force is too great, the needle tube 47 may puncture through the first cavity tube 21 and the second cavity tube 22. Therefore, a limiting sealing ring needs to be provided on the needle tube 47, and a groove that mates with the sealing ring is provided on the inner wall of the fixing sleeve 46. There are at least two sealing rings, and there is a certain gap between the two sealing rings. The gap is precisely controlled so that the needle of the needle tube 47 can puncture into the first cavity tube 21.

[0059] In this invention, the needle tube 47 is preferably made of metal, and secondarily of rigid plastic. A thin ring 48 for puncturing the needle tube 47 is provided on the first cavity tube 21, and the thin ring 48 is located on the tube body of the first cavity tube 21 within the guide sleeve 1. The thickness of the thin ring 48 is less than the thickness of the tube body of the first cavity tube 21 or the second cavity tube 22, to facilitate the insertion of the needle tube 47. Because it is inside the guide sleeve 1, it will not cause breakage during normal nutrient and negative pressure drainage operations. Figure 1 As shown.

[0060] Furthermore, the first cavity tube 21 in this invention is a hollow cylinder, and the second cavity tube 22 is provided with a concave guide groove 8 along the length of the second cavity tube 22 for mounting the first cavity tube 21. The function of the concave guide groove 8 is to guide either the first cavity tube 21 or the second cavity tube 22 regardless of which one is adjusted. In specific implementation, the first cavity tube 21 or the second cavity tube 22 are interlocked in longitudinal section. This reduces the diameter of the second cavity tube 22, which has a certain impact on the delivery of nutrients and water. Specific designs can be made according to actual needs.

[0061] In the current practice of inserting nasogastric tubes for the treatment of patients with diseases, the purpose of using nasogastric tubes is to avoid causing pain to patients during the insertion process, as the nasogastric tubes are made of medical materials with a certain degree of flexibility.

[0062] However, overly soft tubes are difficult to insert, so guide wires are usually used to enhance the overall "rigidity" of the nasogastric tube, making it easier to guide it into the nose, stomach, and intestines. However, the guide wires usually only allow the nasogastric tube to enter the end of the body and do not have angular or directional guiding functions.

[0063] While normal intubation methods do not have any impact on the vast majority of normal individuals, they can easily irritate the esophagus or intestines if there are protruding parts in the intestinal or esophageal structures. Furthermore, the angle and position of the connection between the stomach and intestines vary from person to person, which requires certain steering and angle control during intubation.

[0064] Therefore, such as Figure 4 and Figure 5 As shown, in this invention, a wedge-shaped guide seat 9 is provided on the inner wall of the first cavity tube 21 and the second cavity tube 22 below the side hole 3. The side hole 3 is preferably located near the end of the first cavity tube 21 or the second cavity tube 22. Its purpose is naturally to obtain the maximum steering control angle. A guide cone hole 10 is provided on the surface of the wedge-shaped guide seat 9 facing the direction in which the guide wire 11 enters.

[0065] The centerline of the guide cone hole 10 forms an angle with the length of the first cavity tube 21 or the second cavity tube 22, with the angle ranging from 30° to 60°. The purpose of this angle is to deflect the force exerted by the guide wire on the first cavity tube 21 or the second cavity tube 22 in the radial direction rather than the axial direction, so that the end of the first cavity tube 21 or the second cavity tube 22 will change angle.

[0066] However, due to the influence of the inner diameter of the first cavity tube 21 or the second cavity tube 22, its rotation angle will not be too large, but it is sufficient to meet the purpose of smoothly performing the cannulation operation.

[0067] Its specific working principle is that when the end of the guide wire enters the guide cone hole 10, the continued application of an axial force along the first cavity tube 21 or the second cavity tube 22 to the guide wire will cause the guide wire to bend completely (provided that the guide wire can bend to a certain extent). In this way, the component of the force exerted by the guide wire on the first cavity tube 21 or the second cavity tube 22 will be biased towards the radial direction of the first cavity tube 21 or the second cavity tube 22, thereby causing the end of the first cavity tube 21 or the second cavity tube 22 to change angle.

[0068] In order to enable the guide wire to bend and turn at a target position or a larger angle (mainly at the end of the first cavity tube 21 or the second cavity tube 22), this application provides a preferred embodiment of the guide wire, specifically:

[0069] The guide wire 11 includes a rigid main body section 111 and a flexible deformable section 112 connected to the end of the rigid main body section 111; wherein, when a force is applied along the length direction of the rigid main body section 111, the end of the flexible deformable section 112 bends after contacting the guide cone hole 10 of the wedge-shaped guide seat 9.

[0070] The purpose is to achieve the maximum turning angle when the length of the flexible deformable section 112 is much smaller than the length of the rigid main body section 111, and when the flexible deformable section 112 is slightly smaller than the inner diameter of the first cavity tube 21 or the second cavity tube 22.

[0071] This is because, after the end of the flexible deformable section 112, away from the rigid main body section 111, contacts the guide cone hole 10, it bends radially towards the tube body. At this time, the connection between the flexible deformable section 112 and the rigid main body section 111 is close to the inner wall of the tube body. When the flexible deformable section 112 tends to be parallel to the radial direction of the tube body, it exerts a large force on the inner wall of the tube body (an external force acting on the guide wire along the axial direction of the tube body). This results in a larger deflection angle at the end of the tube body to support the angle adjustment and steering action of the end of the tube body (first cavity tube 21 or second cavity tube 22), such as... Figure 5 As shown.

[0072] In existing nasogastric tube structures, the cap is used to seal the tube when it is not in use, preventing contamination by bacteria or other substances. However, in this invention, since there are multiple tubes, the cap needs to be able to simultaneously or selectively seal the two tubes and the end opening 7 of the outer tube connecting seat 4 of the guide sleeve 1.

[0073] Therefore, the present invention provides a specific embodiment of the flip cover assembly 6:

[0074] like Figure 3 As shown, it includes a cover 61, which is connected to the outer tube connecting seat 4 via a connector. The cover 61 is disc-shaped and can fit perfectly with the end opening 7 of the outer tube connecting seat 4, so as to achieve overall sealing when the two tubes are not used. The connector is a rubber strip integrally formed with the cover.

[0075] To achieve selective sealing, the cover 61 is provided with two wedge plugs 62 corresponding to the Luer locking joints 5 of the combined feed tube 2. The cover 61 is provided with two through holes 63 for installing the wedge plugs 62. The two wedge plugs 62 are installed in the through holes 63 at the same time. The cover 61 is connected to the end opening 7, and the overall sealing is completed (the sealing of the end of the combined feed tube 2 that connects to the nutrient solution or water).

[0076] When one tube is in use and the other tube needs to be sealed, the corresponding wedge plug 62 is opened, and the injection end of the syringe containing nutrients or water is inserted through the through hole 63.

[0077] In the above, it is necessary to supply oxygen (not pure oxygen but air) or perform negative pressure suction to the first cavity tube 21 in an emergency through the air inlet terminal 45. If the patient has a lung disease, the first cavity tube 21 needs to be adjusted to the corresponding position, that is, the inlet of the pulmonary tube. At this time, the length of the first cavity tube 21 needs to be adjusted.

[0078] like Figure 2As shown, by pulling the first cavity tube 21 from the outer tube connector 4 to the corresponding position, the end of the first cavity tube 21 is positioned at a suitable location on the lesion site that needs treatment (at this time, the needle tube 47 is inserted into the thin film ring 48, that is, the positions of the two should correspond during the pulling process, and the needle tube 47 supplies oxygen into the first cavity tube 21).

[0079] At this point, it is necessary to seal the portion of the first cavity tube 21 that has been pulled out of the outer tube connector 4. This can be achieved by making the diameter of the through hole 63 smaller than the outer diameter of the combined feed tube 2. In this case, the diameter of the first cavity tube 21 is restricted by the diameter of the through hole 63, thus compressing the tube diameter and achieving a seal. Alternatively, a wedge plug 62 can be inserted into the through hole 63 at this time to further compress the tube body of the first cavity tube 21.

[0080] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A disposable multifunctional nasogastric tube, characterized in that, It includes a guide sleeve (1) and a combined feed tube (2) with a length greater than that of the guide sleeve (1). The combined feed tube (2) is sleeved with the guide sleeve (1), and one end of the combined feed tube (2) and the guide sleeve (1) are aligned. A side hole (3) is provided on the end surface of the combined feed tube (2) away from the guide sleeve (1). The end of the guide sleeve (1) is provided with an outer tube connector (4), and the end of the combined feed tube (2) that passes through the outer tube connector (4) is connected to a Luer locking connector (5). A flip cover assembly (6) is connected to the outer wall of the outer tube connector (4). The flip cover assembly (6) is used to cooperate with the end opening (7) of the outer tube connector (4) and to seal the end opening (7). The combined feeding tube (2) includes at least two independent tubes for transporting nutrients or performing negative pressure extraction. The outer tube connector (4) includes a sleeve (41) that is sleeved at the connection between the combined feed tube (2) and the Luer locking connector (5). A frustum cavity tube (42) is connected to the end of the sleeve (41) facing the Luer locking connector (5). An inner cavity (43) is provided inside the frustum cavity tube (42). An air outlet microhole (44) is provided at the connection between the sleeve (41) and the frustum cavity tube (42). The inner cavity (43) communicates with the air outlet microhole (44). An air inlet terminal (45) is provided on the outer wall of the frustum cavity tube (42). The combined feeding tube (2) includes a first cavity tube (21) and a second cavity tube (22), which are combined to form a cylindrical cavity; The air inlet terminal (45) includes a fixed sleeve (46) installed on the frustum cavity tube (42) and a needle tube (47) installed inside the fixed sleeve (46). The bottom of the needle tube (47) protrudes from the bottom of the fixed sleeve (46) and enters the inner cavity (43). The outer wall of the needle tube (47) is sealed to the inner wall of the fixed sleeve (46), and the needle tube (47) can move axially along the fixed sleeve (46) to puncture the inner wall of the inner cavity (43) and the first cavity tube (21) under the action of external force.

2. The disposable multifunctional nasogastric tube according to claim 1, characterized in that, The first cavity tube (21) is provided with a thin ring (48) for the needle tube (47) to puncture, and the thin ring (48) is located on the tube body of the first cavity tube (21) inside the guide sleeve (1).

3. The disposable multifunctional nasogastric tube according to claim 1, characterized in that, The first cavity tube (21) is a hollow cylinder, and the second cavity tube (22) is provided with a concave guide groove (8) for mounting the first cavity tube (21) along the length direction of the second cavity tube (22).

4. The disposable multifunctional nasogastric tube according to claim 1, characterized in that, The first cavity tube (21) and the second cavity tube (22) are provided with wedge-shaped guide seats (9) on the inner wall of the tube below the side hole (3). The surface of the wedge-shaped guide seat (9) facing the direction of the guide wire (11) is provided with a guide cone hole (10).

5. A disposable multifunctional nasogastric tube according to claim 4, characterized in that, The guide wire (11) includes a rigid main body section (111) and a flexible deformable section (112) connected to the end of the rigid main body section (111). Wherein, when a force is applied along the length direction of the rigid main body segment (111), the end of the flexible deformable segment (112) bends after contacting the guide cone hole (10) of the wedge-shaped guide seat (9).

6. A disposable multifunctional nasogastric tube according to claim 1, characterized in that, The flip-top assembly (6) includes a cover (61), which is connected to the outer tube connector (4) via a connector. The cover (61) is provided with two wedges (62) corresponding to the Luer locking connectors (5) of the combined feed tube (2). The cover (61) is provided with two through holes (63) for installing the wedges (62). The diameter of the through holes (63) is smaller than the outer diameter of the combined feed tube (2).

7. A disposable multifunctional nasogastric tube according to claim 1, characterized in that, The length of the guide cannula (1) includes the length from the nasal cavity to the pharynx.

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