Enteral nutrition tube pushing set and pushing method thereof

Abstract

The invention belongs to the field of medical instruments, and discloses an enteral nutrient canal pushing set and a pushing method thereof. The enteral nutrition tube pushing set comprises a nutrition tube which is used for being placed through the nose to reach the gastral cavity position and is placed at the jejunum position by means of guiding of a supporting tube, a pathfinding catheter and a guide wire; the supporting tube is used for placing the nutrient tube so as to search for the pylorus or the output loop after reaching the gastral cavity position; the pathfinding catheter is used for being placed through the supporting tube so as to enter the duodenum and advance to the jejunum position after reaching the pylorus position. The device can help to find the pylorus or the output loop, reduces the operation difficulty of the nutrient canal and the discomfort of a patient caused by repeated friction of the nasal cavity in the operation process, and also plays a very good auxiliary role in passing through the narrow section of the intestinal tract; in addition, a narrow section can be helped to be opened, so that the intestinal stent is easier to convey and place.

Description

Technical Field

[0001] The invention belongs to the field of medical devices and relates to an enteral nutrition auxiliary pushing device, in particular to an enteral nutrition tube pushing kit and a pushing method thereof. Background Art

[0002] For patients with upper gastrointestinal obstruction or gastroparesis, most hospitals still use intravenous infusion to solve nutritional problems. However, this parenteral nutrition method has problems such as incomplete nutrition, high cost, long-term hospitalization, and concurrent infection, which have an adverse effect on the long-term survival of patients. Therefore, some hospitals will implement enteral nutrition by placing jejunal nutrition tubes or small intestinal nutrition tubes. Compared with parenteral nutrition, enteral nutrition supplements the nutrients needed by the body more comprehensively and is more conducive to the patient's physical recovery. It not only saves treatment costs, but also makes it possible for these patients to recuperate at home, greatly reducing the length of hospital stay.

[0003] At present, there are two conventional methods for placing feeding tubes: oral placement under digestive endoscopy and transnasal placement under DSA. The advantage of oral placement of feeding tubes under endoscopy is that the gastric cavity segment has good support, which is conducive to pushing the guide wire to the distal end. The disadvantage is that it is not easy for the gastroscope to pass through the stenotic segment, and it is impossible to judge the condition and insertion depth of the guide wire distal to the stenotic segment. In the conventional transnasal placement method under DSA, due to the receptive expansion of the gastric cavity, the catheter guide wire has poor support in the gastric cavity segment, which is not conducive to delivering the guide wire catheter to the duodenum and distal jejunum. In addition, it is difficult to find the output loop of the gastric pylorus or gastric surgery, which increases the difficulty of placing a feeding tube under DSA. In addition, the nasal cavity will be repeatedly rubbed during the operation, causing pain to the patient.

[0004] The two conventional methods of placing a feeding tube mentioned above both require placing the guide wire in a satisfactory position before inserting the feeding tube through the guide wire. During this operation, there is still a possibility of failure of the operation due to insufficient support or slippage of the guide wire. Summary of the invention

[0005] In view of the above-mentioned defects existing in the existing conventional feeding tube placement method, the present invention proposes an enteral feeding tube pushing kit and a pushing method thereof which can greatly reduce the difficulty of feeding tube placement, so as to solve the problems of easy blockage and slippage of the existing feeding tube, maintenance stability and inconvenience for patients.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention is to provide an enteral nutrition tube pushing kit, comprising:

[0008] A nutrition tube, which is inserted through the nose to reach the stomach cavity and is placed in the jejunum with the help of a support tube, a pathfinder catheter, and a guide wire;

[0009] A support tube, which is used to be placed through the feeding tube to reach the gastric cavity and then explore the pylorus or efferent loop;

[0010] A pathfinder catheter is used to be placed through the support tube to reach the pylorus position, then enter the duodenum and move to the jejunum position.

[0011] Furthermore, the nutrition tube is of a straight-cylindrical type, with a length of 1.3 to 2.0 m, an outer diameter of 4.35 to 5.33 mm, and an inner diameter of 3.0 to 4.05 mm.

[0012] Furthermore, the nutrition tube is made of polyurethane / polyimide material, and its surface is coated with polytetrafluoroethylene coating.

[0013] Furthermore, the proximal end of the nutrition tube is at least a two-way joint structure, including a first sleeve joint formed by the proximal end thereof and a second sleeve joint located on one side of the first sleeve joint.

[0014] Further preferably, the second casing joint is arranged obliquely with respect to the first casing joint, and the included angle is 30-60°.

[0015] Furthermore, the nutrition tube is of a straight-cylindrical type, and through holes are provided at intervals along the length direction of at least one side of the tube body at a distance of 50 to 60 cm from the proximal end, and the number of the through holes is 8 to 12.

[0016] Further preferably, the proximal end of the feeding tube is at least a two-way joint structure, which includes a first sleeve joint formed by the proximal end thereof and a second sleeve joint located on one side of the first sleeve joint.

[0017] Furthermore, the nutrition tube is of a straight-cylindrical type, and a plurality of first interlayer side holes connected in sequence are opened on the tube body 50 to 60 cm away from the proximal end, and the number of the first interlayer side holes is 8 to 12.

[0018] Further preferably, a plurality of the first interlayer side holes are interconnected through the first interlayer channels opened on the inner wall of the tube body.

[0019] Further preferably, a plurality of the first interlayer side holes are arranged at intervals along the length direction of the feeding tube.

[0020] Further preferably, a plurality of the first interlayer side holes are distributed in a spiral shape along the circumference of the nutrition tube.

[0021] Further preferably, a plurality of the first interlayer side holes are dispersedly arranged along the circumference of the nutrition tube.

[0022] Further preferably, the proximal end of the nutrition tube is at least a three-way joint structure, which includes a first sleeve joint formed by the proximal end thereof and a second sleeve joint and a third sleeve joint located at upper and lower sides of the first sleeve joint;

[0023] Wherein, the second sleeve joint is in communication with the inner cavity of the first sleeve;

[0024] The third sleeve joint is connected to a plurality of the first interlayer side holes in sequence through a first interlayer channel opened in the pipe wall.

[0025] Further preferably, a first positioning mark is provided on the nutrition tube at 80 to 90 cm from the proximal end, and the first positioning mark is annular or linear.

[0026] Furthermore, the nutrition tube is a straight tube, and a plurality of second interlayer side holes and a plurality of third interlayer side holes are respectively arranged at 10 cm from the proximal end and the distal end of the tube body;

[0027] Wherein, a plurality of the second interlayer side holes are connected to the third interlayer side holes through a plurality of second interlayer channels opened in the tube wall.

[0028] Further preferably, a plurality of second interlayer side holes and a plurality of third interlayer side holes are arranged at intervals along the length direction of the feeding tube.

[0029] Further preferably, the plurality of second interlayer side holes and the plurality of third interlayer side holes are distributed in a spiral shape along the circumference of the nutrition tube.

[0030] Further preferably, a plurality of second interlayer side holes and a plurality of third interlayer side holes are dispersedly arranged along the circumference of the nutrition tube.

[0031] Further preferably, the proximal end of the feeding tube is at least a two-way joint structure, which includes a first sleeve joint formed by its proximal end and a second sleeve joint located on one side of the first sleeve joint, the second sleeve joint is connected to the inner cavity of the first sleeve, and the number of the second interlayer side holes and the third interlayer side holes are both 8 to 12.

[0032] Further preferably, a one-way film valve is arranged in the second interlayer channel between the second interlayer side hole and the third interlayer side hole.

[0033] Further preferably, a second positioning mark is provided on the tube body between the second interlayer channel and the third interlayer side hole, and the second positioning mark is annular or linear.

[0034] Furthermore, the length of the support tube is 1.6 to 1.8 m, and its length is 20 to 30 cm greater than the length of the nutrition tube.

[0035] More preferably, the support tube has an outer diameter of 2.6-4.0 mm and an inner diameter of 1.56-2.0 mm.

[0036] Further preferably, the distal end of the support tube is a curved and pre-molded exposed section, and the angle relative to the length direction thereof is 20-30°.

[0037] Further preferably, the length of the exposed section is 20 to 30 cm, and the diameter gradually decreases from the proximal end to the distal end.

[0038] Furthermore, the outer diameter of the exposed section gradually decreases to 2.6-2.95 mm from the proximal end to the distal end.

[0039] Further preferably, the inner diameter of the exposed section gradually decreases to 1.63-1.96 mm from the proximal end to the distal end.

[0040] Furthermore, the support tube is made of polytetrafluoroethylene or nylon 12.

[0041] Furthermore, a third positioning mark is provided on the support tube, and the third positioning mark is annular or linear.

[0042] Furthermore, the pathfinder catheter is at least a two-way joint structure, which includes a first pathfinder joint formed by its proximal end and a second pathfinder joint located on one side of the first pathfinder joint.

[0043] Furthermore, the second pathfinder joint is arranged obliquely relative to the first pathfinder joint, and the angle thereof is 30 to 60 degrees.

[0044] Furthermore, the distal end of the pathfinder catheter is a curved and pre-molded elbow section, and the angle of the elbow section relative to its length direction is 3 to 5 degrees.

[0045] Furthermore, the pathfinder catheter has a length of 1.8 to 2.0 m, an outer diameter of 1.55 to 1.9 mm, and an inner diameter that can pass through a .38 guide wire.

[0046] Furthermore, the pathfinder catheter is made of polyurethane / polyimide, polytetrafluoroethylene or nylon 12.

[0047] The second aspect of the present invention is to provide an enteral nutrition delivery method of the delivery set, wherein the nutrition tube is an I-type structure without side holes, and specifically comprises the following steps:

[0048] S11, insert the feeding tube through the nose to the stomach cavity;

[0049] S12, insert the support tube through the feeding tube, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0050] S13, inserting the pathfinder catheter and the guide wire therein through the support tube, and entering the duodenum after reaching the pylorus and advancing to the jejunum, or passing through the narrow section and entering the distal intestinal tract;

[0051] S13, then controlling the feeding tube and the support tube to follow along the pathfinding catheter to a satisfactory position in the jejunum, or controlling the proximal position;

[0052] S14, retain the feeding tube and guide wire, and remove the support tube and pathfinding catheter;

[0053] S15, fix the nutrition tube and realize nutrition delivery through the nutrition tube;

[0054] S16, after the nutrition delivery is completed, the operation is ended with drinking water flushing.

[0055] The third aspect of the present invention is to provide an enteral nutrition delivery method of the delivery set, wherein the nutrition tube is a type II structure of double interfaces + double lumens + proximal side holes, and specifically comprises the following steps:

[0056] S21, insert the feeding tube through the nose to reach the stomach cavity and prevent it from slipping;

[0057] S22, insert the support tube through the feeding tube, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0058] S23, inserting the pathfinder catheter and the guide wire therein through the support tube, finding the pylorus position, and then entering the duodenum and moving to the jejunum position;

[0059] S24, then controlling the nutrition tube and the support tube to follow the pathfinding catheter to the jejunum, adjusting the position of the nutrition tube through the first positioning mark so that the side hole is placed in the stomach cavity;

[0060] S25, retain the feeding tube, and withdraw the guide wire, support tube, and pathfinding catheter in sequence;

[0061] S26, fix the nutrition tube and realize nutrition delivery through the nutrition tube.

[0062] The fourth aspect of the present invention is to provide an enteral nutrition delivery method of the delivery set, wherein the nutrition tube is a type III structure of single interface + double cavity + proximal and distal side holes, and specifically comprises the following steps:

[0063] S31, insert the feeding tube through the nose to reach the stomach cavity and prevent it from slipping;

[0064] S32, insert the support tube through the feeding tube, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0065] S33, inserting the pathfinder catheter and the guide wire therein through the support tube, finding the pylorus position, and then entering the duodenum and moving to the jejunum position;

[0066] S34, then controlling the nutrition tube and the support tube to follow the pathfinding catheter to the jejunum, and adjusting the position of the nutrition tube according to the second positioning mark so that the second positioning mark passes over the intestinal stenosis;

[0067] S35, retain the feeding tube, and withdraw the guide wire, support tube, and pathfinding catheter in sequence;

[0068] S36, fixed feeding tube, nutrition delivery is achieved through the feeding tube, and the patient can also eat liquid food without residue.

[0069] The present invention adopts the above technical solution, which has the following technical effects compared with the prior art:

[0070] (1) Reduce the difficulty of operation: The enteral nutrition tube push kit can reduce the difficulty of operation, easily insert it through the nasal cavity, help find the pylorus or output loop, reduce the difficulty of operation of the nutrition tube and the discomfort caused to the patient by repeated friction of the nasal cavity during operation, and also play a good auxiliary role in passing through the narrow section of the intestine;

[0071] (2) Solve the problem of insufficient gastric cavity support: The enteral nutrition tube push kit can solve the problem of insufficient support of conventional push equipment due to the expansion of gastric cavity receptivity during surgery;

[0072] (3) Solve the problems of tube blockage and inconvenient maintenance: The push kit can help to open the narrow section, making the delivery and placement of the intestinal stent easier. It can also easily solve the problems of tube blockage and slippage of the nutrition tube, and is easy to maintain and replace. Patients and their families can also maintain it by themselves.

[0073] (4) Beautiful and convenient: The nutrition tube part of the enteral nutrition tube push kit can be easily disassembled when not in use, and can also be installed by oneself when enteral nutrition is needed, solving the problem of inconvenience in travel for patients;

[0074] (5) Wide range of applications: The nutrition tube used in the enteral nutrition tube push kit has three subtypes of structural design: Type I without side holes, Type II with single side holes, and Type III with double side holes, which can be suitable for patients with different diseases and meet different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 This is a schematic diagram of the three-dimensional structure of a straight-cylinder nutrition tube;

[0076] Figure 2 This is a schematic diagram of the main structure of a straight-cylinder nutrition tube;

[0077] Figure 3 The figure is a schematic diagram of the cross-sectional structure of a straight-cylinder nutrition tube;

[0078] Figure 4 The top view of the nutrition tube is a straight-cylinder structure diagram;

[0079] Figure 5 This is a three-dimensional structural diagram of a nutrition tube with a double-way connector structure;

[0080] Figure 6 This is a schematic diagram of the main structure of the nutrition tube with a double-way joint structure;

[0081] Figure 7 This is a schematic diagram of the cross-sectional structure of a nutrition tube with a two-way joint structure;

[0082] Figure 8 This is a schematic diagram of a top view of a nutrition tube having a double-way joint structure;

[0083] Fig. 9 This is a schematic diagram of the three-dimensional structure of the nutrition tube as a through-hole structure;

[0084] Fig.10 This is a schematic diagram of the main structure of the nutrition tube as a through-hole structure;

[0085] Fig.11 This is a schematic diagram of the cross-sectional structure of the nutrition tube as a through-hole structure;

[0086] Fig.12 This is a schematic diagram of a top view of a nutrition tube having a through hole structure;

[0087] Fig.13 It is a schematic diagram of the three-dimensional structure of the nutrition tube with a through hole and a double-way connector structure;

[0088] Fig.14 This is a schematic diagram of the main structure of the nutrition tube with a through hole and a double-way joint structure;

[0089] Fig.15 It is a schematic diagram of the cross-sectional structure of the nutrition tube with a through hole and a two-way joint structure;

[0090] Fig.16 It is a top view schematic diagram of the nutrition tube with a through hole and a double-way joint structure;

[0091] Fig.17 It is a three-dimensional structural schematic diagram of a nutrition tube having a single-side sandwich side hole and a single-lumen connector structure;

[0092] Fig.18 This is a schematic diagram of the main structure of the nutrition tube with a single-sided sandwich side hole and a single-lumen connector structure;

[0093] Fig.19 It is a three-dimensional structural schematic diagram of a nutrition tube having a single-side sandwich side hole and a double-way connector structure;

[0094] Fig. 20 This is a schematic diagram of the main structure of the nutrition tube with a single-sided sandwich side hole and a double-way connector structure;

[0095] Fig.21 The cross-sectional structure of the nutrition tube is a single-sided sandwich side hole and a double-way connector structure. Figure 1 ;

[0096] Fig. 22 The cross-sectional structure of the nutrition tube is a single-sided sandwich side hole and a double-way connector structure. Figure 2 ;

[0097] Fig.23 It is a schematic diagram of the three-dimensional structure of a nutrition tube with a single-sided sandwich side hole and a three-lumen connector;

[0098] Fig.24 This is a schematic diagram of the main structure of the nutrition tube with a single-sided sandwich side hole and a three-lumen connector;

[0099] Fig.25 The figure is a schematic diagram of the transverse cross-sectional structure of a nutrition tube with a single-sided sandwich side hole and a three-lumen connector;

[0100] Fig.26 This is a schematic diagram of the overall cross-sectional structure of a nutrition tube with a single-sided sandwich side hole and a three-lumen connector;

[0101] Fig. 27 It is a schematic diagram of the three-dimensional structure of the nutrition tube with double-sided sandwich side holes;

[0102] Fig.28 This is a schematic diagram of the main structure of the nutrition tube with double-sided sandwich side holes;

[0103] Fig.29 The figure is a schematic diagram of the cross-sectional structure of a nutrition tube with double-sided sandwich side holes;

[0104] Fig.30 The top view schematic diagram of the nutrition tube with double-sided sandwich side holes;

[0105] Fig.31 This is a schematic diagram of the overall cross-sectional structure of a nutrition tube with double-sided sandwich side holes;

[0106] Fig.32 The figure is a three-dimensional structural diagram of a nutrition tube with double-sided sandwich side holes and a double-lumen connector;

[0107] Fig.33 This is a schematic diagram of the main structure of the nutrition tube with double-sided sandwich side holes and a double-lumen connector;

[0108] Fig.34 The figure is a vertical cross-sectional structural diagram of a nutrition tube having double-sided sandwich side holes and a double-lumen connector;

[0109] Fig.35 The figure is a schematic diagram of the cross-sectional structure of a nutrition tube with double-sided sandwich side holes and a double-lumen connector;

[0110] Fig.36This is a schematic diagram of the overall structure of the nutrition tube with double-sided sandwich side holes and a double-lumen connector;

[0111] Fig.37 Schematic diagram of the three-dimensional structure of the support tube;

[0112] Fig.38 It is a schematic diagram of the main structure of the support tube;

[0113] Fig.39 is a schematic diagram of the cross-sectional structure of the support tube;

[0114] Fig.40 Schematic diagram of the top view of the support tube;

[0115] Fig.41 It is a schematic diagram of the three-dimensional structure of the pathfinder catheter;

[0116] Fig.42 This is a schematic diagram of the main structure of the pathfinder catheter;

[0117] Fig.43 It is a schematic diagram of the cross-sectional structure of the pathfinder catheter;

[0118] Fig.44 This is a schematic diagram of the top view of the pathfinder catheter. DETAILED DESCRIPTION

[0119] The present invention first provides an enteral nutrition tube push set, which is mainly composed of three parts: a nutrition tube 10, a support tube 20 and a pathfinder catheter 30. The nutrition tube 10 is used to be inserted through the nose to reach the gastric cavity position, and is placed in the jejunum position with the help of the support tube, the pathfinder catheter and the guide wire, and plays the role of support and nutrition delivery at the same time; the support tube 20 is used to be inserted through the nutrition tube 10 to reach the gastric cavity position and then explore the pylorus or output loop; the pathfinder catheter 30 is used to be inserted through the support tube 20 to enter the duodenum after reaching the pylorus position and move to the jejunum position.

[0120] The enteral nutrition tube push kit is designed with nutrition tubes 10 of different structural characteristics for patients with different diseases. The nutrition tubes 10 are mainly divided into three subtypes: type I, type II, and type III, as follows:

[0121] Type I feeding tube 10 is a type without side holes: the distal end reaches the jejunum and can be used directly as a feeding tube; usage scenarios: pancreatitis patients who are in a coma or unable to eat independently and require jejunal nutritional support.

[0122] II Nutritional Tube 10 is a double-port + double-lumen + proximal side hole type: the distal end is placed in the jejunum and used as a nutrition tube. There is a MARK mark on the far end of the side hole. When placed, the MARK does not exceed the pylorus to ensure that the side hole is located in the gastric cavity and is used for gastrointestinal decompression. Usage scenario: patients with gastroparesis who require enteral nutrition.

[0123] III Nutrition tube 10 is a single-lumen connector + double-lumen + proximal and distal double-side holes: MARK is located between the proximal and distal side holes, and the proximal and distal side holes are connected. When placing the nutrition tube, make sure that MARK passes over the narrow section of the intestine, acting as a temporary intestinal stent or for patients who are not suitable for intestinal stents. Usage scenario: For patients with intestinal stenosis, this design allows patients to eat liquid without residue on their own, and nutrition can also be injected through the nutrition tube.

[0124] By using the enteral nutrition tube pushing kit provided by the present invention, guide wire exploration and nutrition tube placement can be completed at one time for patients with different diseases, avoiding the risk of insufficient guide wire support and slippage, greatly reducing the difficulty and time of the operation, and eliminating the pain of repeated rubbing of the nasal cavity.

[0125] In addition, for the application scenarios corresponding to the three subtypes of the feeding tube 10, the present invention also provides a one-step placement method for the corresponding push kit. The one-step method not only avoids the disadvantages of placement under gastroscopy, but also effectively solves the problem that the prior art is not easy to adjust the guidewire catheter to the pylorus or output loop, and the difficulty in supporting the guidewire catheter in the gastric cavity segment, making it easier to deliver the feeding tube to the distal end.

[0126] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0127] The present invention is described in detail and specifically by specific embodiments below to make the present invention better understood, but the following embodiments do not limit the scope of the present invention. In addition, when describing the orientation, the present invention refers to the direction close to the operator during surgery as "near" and the direction away from the operator as "far".

[0128] Example 1

[0129] See also Figure 1 , Fig.37 and Fig.41 As shown, this embodiment provides an enteral nutrition tube push kit, which is a set structure consisting of a nutrition tube 10 that can be developed under X-ray fluoroscopy, a support tube 20 and a pathfinding catheter 30. The structure of the nutrition tube 10 is as shown in FIG. Figure 1 As shown, the structure of the support tube 20 is as follows Fig.35 As shown, and the structure of the pathfinder catheter 30 is as shown Fig.39 As shown, the feeding tube 10, the support tube 20 and the pathfinding catheter 30 all have a proximal end and a distal end.

[0130] The nutrition tube 10 adopts a type I structure design without side holes. When in use, the distal end of the nutrition tube 10 without side holes reaches the jejunum and can be used directly as a nutrition tube. The use scenario of the nutrition tube 10 without side holes is: pancreatitis patients who are comatose or unable to eat independently and need jejunal nutritional support.

[0131] In this embodiment, if Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the feeding tube 10 is a hollow tubular structure with a proximal end and a distal end, and its function is to be inserted through the nose to reach the stomach cavity. The use of the feeding tube 10 avoids repeated friction on the nasopharyngeal tract during the operation, plays a protective role, and also plays a certain supporting role.

[0132] In this embodiment, if Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the nutrition tube 10 is a straight tube with a length of 1.3 to 2.0 m, such as a general length of 1.3 to 1.5 m. Of course, according to the location of intestinal stenosis, a 1.6 to 2 m long nutrition tube can be specially made. The outer diameter of the nutrition tube 10 is 4.35 to 5.33 mm, and the inner diameter is 3.0 to 4.05 mm; preferably, the outer diameter of the nutrition tube 10 is 4.65 to 5.0 mm, and the inner diameter is 3.2 to 3.85 mm.

[0133] As an implementation method, Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the proximal end of the nutrition tube 10 is a two-way joint structure, which includes a first sleeve joint 11 formed by the proximal end thereof and a second sleeve joint 12 located on one side of the first sleeve joint 11. The first sleeve joint 11 is used to enter the nutrition tube 40, and the second sleeve joint 12 is used to inject water or other liquids. The second sleeve joint 12 on one side of the first sleeve joint 11 is an integrally formed structure.

[0134] In this embodiment, if Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the second sleeve joint 12 is arranged obliquely relative to the first sleeve joint 11, and the angle thereof is 30-60°; preferably, the angle thereof is 32-55°; further preferably, the angle thereof is 32-50°; more preferably, the angle thereof is 35-48°; more preferably, the angle thereof is 35-40°.

[0135] In this embodiment, the main body of the nutrition tube 10 and the second sleeve joint 12 on one side of the first sleeve joint 11 are an integral structure, and are made of one or both of polyurethane and polyimide materials. The polyurethane and polyimide used have the characteristics of soft material, good elasticity, and not easy to breed bacteria.

[0136] As an alternative technical solution, the material of the nutrition tube 10 can also be PEEK, nylon, polyurethane, polyethylene terephthalate (PET), HDHMWPE (high-density, high-molecular-weight polyethylene) or thermoplastic elastomer, etc.

[0137] In addition, according to actual application needs, a protective layer can be coated on the surface of the nutrition tube 10. The protective layer is made of polytetrafluoroethylene coating. The polytetrafluoroethylene coating has an extremely low friction coefficient and is resistant to acids, alkalis, and various organic solvents. It reduces the resistance of the nutrition tube 10 in the intestine and ensures the stability of the product.

[0138] In this embodiment, a first positioning mark 13 is provided on the nutrition tube 10 at a distance of 80 to 90 cm from the proximal end. The first positioning mark 13 is annular or linear.

[0139] In this embodiment, if Fig.37 , Fig.38 , Fig.39 and Fig.40 As shown, the support tube 20 is a hollow tubular structure with a proximal end and a distal end, specifically, a proximal support tube proximal joint 21 and a distal exposed section 22, which is used to be inserted through the nutrition tube 10 to reach the gastric cavity and then explore the pylorus or the output tract. The use of the support tube 20 can help the surgeon quickly find the output tract and play a supporting role, reduce the difficulty of the operation, and save the operation time.

[0140] The length of the support tube 20 is 1.6 to 1.8 m, and its length is greater than 20 to 30 cm of the length of the nutrition tube 10; preferably, the length of the support tube 20 is 1.65 to 1.76 m, and its length is greater than 22 to 28 cm of the length of the nutrition tube 10; more preferably, the length of the support tube 20 is 1.68 to 1.75 m, and its length is greater than 23 to 27 cm of the length of the nutrition tube 10; more preferably, the length of the support tube 20 is 1.68 to 1.72 m, and its length is greater than 25 to 26 cm of the length of the nutrition tube 10. Specifically, the length of the support tube 20 is based on the length of the nutrition tube 10, and its length must exceed 20 to 30 cm of the length of the nutrition tube 10, and can be lengthened if necessary.

[0141] The inner and outer diameters of the support tube 20 need to correspond to the inner diameter of the nutrition tube 10 and the outer diameter of the pathfinder catheter 30, so that the support tube 20 and the pathfinder catheter 30 can be freely passed through. Specifically, the outer diameter of the support tube 20 is 2.6-4.0 mm, and the inner diameter of the support tube 20 matching the inner diameter of the nutrition tube 10 is 1.56-2.0 mm, for the purpose of passing the 5-6F pathfinder catheter 30; preferably, the outer diameter of the support tube 20 is 2.8-3.8 mm, and the inner diameter is 1.60-1.92 m; more preferably, the outer diameter of the support tube 20 is 2.9-3.6 mm, and the inner diameter is 1.65-1.86 mm; more preferably, the outer diameter of the support tube 20 is 3.2-3.5 mm, and the inner diameter is 1.70-1.76 mm.

[0142] The distal end of the support tube 20 is a curved and pre-molded exposed section 22, with an angle of 25 to 90° relative to its length direction. The large elbow structure design can guide and control the direction of the guidewire, making it easier to find the pylorus or output loop. The length of the exposed section 22 is 20 to 30 cm, and the diameter gradually decreases from the proximal end to the distal end. That is, the exposed section 22 at the distal end of the support tube 20 at the nutrition tube 10 is designed with a tapered structure with a gradually decreasing diameter, and the outer diameter of the exposed section 22 gradually decreases to 2.6 to 2.95 mm from the proximal end to the distal end. The inner diameter of the exposed section 22 gradually decreases to 1.63 to 1.96 mm from the proximal end to the distal end. That is, the inner and outer diameters of the exposed section 22 begin to tighten after exiting the nutrition tube 10, with the purpose of passing through the 5 to 6F pathfinder catheter 30 tube.

[0143] The support tube 20 is made of polytetrafluoroethylene, nylon 12 or other preferred polymer materials. The exposed section 22 and the support tube 20 are both injection molded with polymer materials, wherein the exposed section 22 has the functions of guiding, increasing permeability, and reducing intestinal wall damage. The polymer material of the exposed section 22 is designed to be lubricating and durable, and the polymer material can be selected from one or more of ABS (ABS resin), PLA (polylactic acid), PVA (polyvinyl alcohol), PTFE (polytetrafluoroethylene) and Nylon (nylon). The support tube 20 made of tough material, the sleeve structure composed of the pathfinding catheter and the guide wire can provide sufficient support in the gastric cavity section, making the placement of the nutrition tube 10 smoother.

[0144] The support tube 20 is provided with a third positioning mark 23, which is annular or linear. The third positioning mark 23 is an annular marking ring, which is set at the distal end of the support tube 20 through an interference sleeve; or the third positioning mark 23 is a linear strip mark, which is embedded at the distal end along the direction of the support tube 20. The third positioning mark 23 is made of platinum-iridium alloy material, and the position of the distal end of the support tube 20 in the body can be further clarified through the third positioning mark 23.

[0145] In this embodiment, if Fig.41 , Fig.42 , Fig.43 and Fig.44 As shown, the entire body of the pathfinder catheter 30 can be visualized. It is a hollow tubular structure with a proximal end and a distal end. The pathfinder catheter 30 is used to be placed through the support tube 20, and then enter the duodenum after reaching the pylorus position and move to the jejunum position. The use of the pathfinder catheter 30 can make it easier for the guidewire catheter to pass through the intestinal stenosis, and is more adaptable to the multi-bend structure of the distal jejunum, so that the guidewire can move more smoothly and farther in the multi-bend structure of the jejunum.

[0146] The pathfinder catheter 30 is a double-way connector structure, which includes a first pathfinder connector 31 formed by its proximal end and a second pathfinder connector 32 located on one side of the first pathfinder connector 31. The first pathfinder connector 31 and the second pathfinder connector 32 are an integrally formed structure. The first pathfinder connector 31 is used to insert a guide wire, and the second pathfinder connector 32 is used to inject a contrast agent. The double-lumen connector design of the pathfinder catheter 30 achieves the effect of injecting a contrast agent while pathfinder, avoiding the need for conventional catheters to withdraw the guide wire before injecting the contrast agent, making the operation more convenient.

[0147] The second pathfinder joint 32 is arranged at an angle relative to the first pathfinder joint 31, and the angle thereof is 30 to 60°. Preferably, the angle thereof is 32 to 56° relative to the first pathfinder joint 31; more preferably, the angle thereof is 35 to 50° relative to the first pathfinder joint 31; more preferably, the angle thereof is 40 to 45° relative to the first pathfinder joint 31.

[0148] The distal end of the pathfinder catheter 30 is a curved and pre-molded elbow section 33, and the angle of the elbow section 33 relative to its length direction is 3 to 5 degrees; preferably, the angle of the elbow section 33 relative to its length direction is 3.2 to 4.9 degrees; more preferably, the angle of the elbow section 33 relative to its length direction is 3.5 to 4.8 degrees; more preferably, the angle of the elbow section 33 relative to its length direction is 4.2 to 4.5 degrees

[0149] The length of the pathfinder catheter 30 is based on the support tube 20, and the length needs to exceed the support tube by 20 to 30 cm. If necessary, it can be lengthened. Specifically, the length of the pathfinder catheter 30 is 1.8 to 2.0 m, the outer diameter is 1.55 to 1.9 mm, and the inner diameter can pass through a 0.38 guide wire. Preferably, the length of the pathfinder catheter 30 is 1.85 to 1.96 m, the outer diameter is 1.60 to 1.85 mm, and the inner diameter can pass through a 0.38 guide wire; more preferably, the length of the pathfinder catheter 30 is 1.88 to 1.95 m, the outer diameter is 1.65 to 1.80 mm, and the inner diameter can pass through a 0.38 guide wire; more preferably, the length of the pathfinder catheter 30 is 1.90 to 1.93 m, the outer diameter is 1.72 to 1.80 mm, and the inner diameter can pass through a 0.38 guide wire.

[0150] As required, the pathfinder catheter 30 can be made of nylon 12 or other preferred polymer materials. The pathfinder catheter 30 has the functions of guiding, increasing permeability, and reducing intestinal wall damage. In addition, the polymer material on the surface of the pathfinder catheter 30 is designed to be lubricating and durable, and one or more of ABS (ABS resin), PLA (polylactic acid), PVA (polyvinyl alcohol), PTFE (polytetrafluoroethylene) and Nylon (nylon) are used.

[0151] As a specific application of the enteral nutrition tube push set solution of this embodiment, for patients with pancreatitis who are comatose or unable to eat independently and need jejunal nutrition support, the nutrition tube 10 adopts an I-type structure without side holes, a straight barrel type or double-lumen connector with a proximal single-lumen connector, and the distal end reaches the jejunum and can be directly used as a nutrition tube.

[0152] The enteral nutrition tube pushing set having an I-type structure nutrition tube 10 without side holes, a support tube 20 and a pathfinding catheter 30, and the enteral nutrition pushing method thereof when used, specifically comprises the following steps:

[0153] Step 1, insert the feeding tube 10 through the nose to reach the stomach cavity and prevent it from slipping;

[0154] Step 2, insert the support tube 20 through the feeding tube 10, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0155] Step 3, insert the pathfinder catheter 30 and the guide wire therein through the support tube 20, find the pylorus position, and then enter the duodenum and move to the jejunum position;

[0156] Step 4, then controlling the feeding tube 10 and the support tube 20 to follow the pathfinding catheter 30 to the jejunum position;

[0157] Step 5, retain the feeding tube 10, and withdraw the guide wire, support tube 20 and pathfinding catheter 30 in sequence;

[0158] Step 6, fixing the nutrition tube 10, and delivering nutrition through the nutrition tube 10;

[0159] Step 7: After the nutrition delivery is completed, the nutrition tube 10 is flushed with drinking water.

[0160] Example 2

[0161] See also Fig.16 , Fig.18 and Fig.23 As shown, different from the above-mentioned embodiment 1, an improved enteral nutrition tube push kit is provided for the use scenario of patients with gastroparesis who need enteral nutrition, which adopts a new type of nutrition tube 10, and the new type of nutrition tube 10 has a first positioning mark 13 and a plurality of first interlayer side holes 16.

[0162] The new type of nutrition tube 10 is a type II structure design of double interfaces + double lumens + proximal side holes. When in use, the distal end of the new type of nutrition tube 10 is placed in the jejunum and used as a nutrition tube. The farthest end of the side hole is marked with a MARK. When placed, the MARK does not exceed the pylorus to ensure that the side hole is located in the gastric cavity and is used for gastrointestinal decompression; usage scenario: patients with gastroparesis who need enteral nutrition.

[0163] The first positioning mark 13 is located at the farthest end of the nutrition tube 10, about 80 to 90 cm from the proximal end of the nutrition tube 10, and the first positioning mark 13 is annular or linear. The first interlayer side holes 16 are connected to the outside of the tube body, and the inside is not connected to the inner cavity of the nutrition tube 10, and each first interlayer side hole 16 is connected to each other through the first interlayer channel 17 on the tube body.

[0164] As one of the implementation schemes of this embodiment, Fig.17 and Fig.18 As shown, the feeding tube 10 is a straight tube, and a plurality of first interlayer side holes 16 are opened at 50 to 60 cm from the proximal end of the tube body. The number of the first interlayer side holes 16 is 8 to 12, and they are located at one end of the feeding tube 10, which can also be called a single-side hole structure. When in use, the first positioning mark 13 at the distal end of the feeding tube 10 is placed not to exceed the pylorus, so as to ensure that the first interlayer side holes 16 are located in the gastric cavity for gastrointestinal decompression.

[0165] As an alternative technical solution, Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 and Fig.16 As shown, regardless of the straight-tube feeding tube 10 with a single-lumen structure, an improved feeding tube 10 is provided, in which a plurality of through holes 14 are provided at the proximal end of the new feeding tube 10 .

[0166] See also Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, specifically, at least one side of the nutrition tube 10 at a distance of 50 to 60 cm from the proximal end is provided with through holes 14 spaced apart along the length direction thereof, and the number of the through holes 14 is 8 to 12.

[0167] In addition, as needed, the through holes 14 may be arranged in a ring shape along the circumference of the nutrition tube 10; or the through holes 14 may be arranged in a spiral shape along the circumference of the nutrition tube 10; or the through holes 14 may be arranged in a dispersed manner along the circumference of the nutrition tube 10.

[0168] Accordingly, if Fig.13 , Fig.14 , Fig.15 and Fig.16 As shown, the proximal end of the feeding tube 10 with the through hole 14 can be a single-lumen joint structure or a double-way joint structure, and the double-way joint structure includes a first sleeve joint 11 formed by its proximal end and a second sleeve joint 12 located on one side of the first sleeve joint 11.

[0169] As another implementation of this embodiment, Fig.19 , Fig. 20 , Fig.21 and Fig. 22 As shown, the proximal end of the nutrition tube 10 is a two-way joint structure, which mainly includes a first sleeve joint 11 and a second sleeve joint 12. The first sleeve joint 11 is composed of the proximal end of the nutrition tube 10, and the second sleeve joint 12 is located at one side of the first sleeve joint 11.

[0170] The second sleeve joint 12 is connected to the inner cavity of the first sleeve joint 11. A plurality of first interlayer side holes 16 are provided on the nutrition tube 10 with the double-way joint structure at 50 to 60 cm from the proximal end, and the first interlayer side holes 16 are blind holes provided on the proximal tube body of the nutrition tube 10, and the first interlayer side holes 16 are connected to each other through the first interlayer channels 17 on the tube body.

[0171] According to actual needs, the first interlayer side holes 16 are arranged at intervals along the length direction of the feeding tube 10, or are distributed in a spiral shape along the circumference of the feeding tube 10 at its proximal end, or are dispersedly arranged along the circumference of the feeding tube 10. At the same time, it is also required that the first positioning mark 13 at the distal end of the feeding tube 10 is placed not beyond the pylorus to ensure that the first interlayer side holes 16 are located in the gastric cavity for gastrointestinal decompression.

[0172] As another implementation of this embodiment, Fig.23 , Fig.24 , Fig.25 and Fig.26 , a nutrition tube 10 with a three-way joint structure and a single-side hole structure is provided. The nutrition tube 10 mainly includes a first sleeve joint 11, a second sleeve joint 12 and a third sleeve joint 15.

[0173] The first sleeve joint 11 is formed by the proximal end of the feeding tube 10, and the second sleeve joint 12 and the third sleeve joint 15 are respectively located at the upper and lower sides of the first sleeve joint 11. The second sleeve joint 12 is connected to the inner cavity of the first sleeve joint 11. The third sleeve joint 15 is connected to a plurality of first interlayer side holes 16 in sequence through a first interlayer channel 17 opened in the tube wall.

[0174] As a specific application of the push set with the second nutrition tube 10 scheme of this embodiment, the nutrition tube 10 used has a double-way joint structure, a double cavity and a proximal first sandwich side hole 16 structure, the double-way joint structure is a first sleeve joint 11 and a second sleeve joint 12, and the double cavity is the inner cavity of the nutrition tube 10 and the first sandwich channel 17. When in use, the distal end of the nutrition tube 10 is placed in the jejunum and used as a nutrition tube. The first positioning mark 13 is set at the farthest end of the first sandwich side hole 16. When placed, the first positioning mark 13 does not exceed the pylorus to ensure that the first sandwich side hole 16 is located in the gastric cavity to play a role in gastrointestinal decompression.

[0175] The enteral nutrition tube pushing set of the II-type structure nutrition tube 10 with a proximal single-end side hole, the support tube 20 and the pathfinding catheter 30, when used, comprises the following steps for the enteral nutrition pushing method:

[0176] Step 1, insert the feeding tube 10 through the nose to reach the stomach cavity and prevent it from slipping;

[0177] Step 2, insert the support tube 20 through the feeding tube 10, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0178] Step 3, insert the pathfinder catheter 30 and the guide wire therein through the support tube 20, find the pylorus position, and then enter the duodenum and move to the jejunum position;

[0179] Step 4, then control the feeding tube 10 and the support tube 20 to follow the pathfinding catheter 30 to the jejunum position, adjust the position of the feeding tube 10 through the first positioning mark 13, and place the side hole in the stomach cavity for gastrointestinal decompression;

[0180] Step 5, retain the feeding tube 10, and withdraw the guide wire, support tube 20 and pathfinding catheter 30 in sequence;

[0181] Step 6, fixing the nutrition tube 10 and delivering nutrition through the nutrition tube 10.

[0182] Example 3

[0183] See also Fig. 27 and Fig.32 As shown, different from the above-mentioned embodiment 1, a push set with a specific structural design is used for the special application scenario of patients with intestinal stenosis. The enteral nutrition tube push set adopts a new type of nutrition tube 10, which has a second sandwich side hole 18 and a plurality of third sandwich side holes 19, and a second positioning mark 112 is provided on the tube body between the second sandwich side hole 18 and the plurality of third sandwich side holes 19. This design allows patients to eat liquid without residue by themselves, and nutrition can also be injected through the nutrition tube.

[0184] The novel feeding tube 10 is a type III structure design of single lumen connector + double lumen + proximal and distal double side holes, and the MARK is located between the proximal and distal side holes of the feeding tube 10, and the proximal and distal side holes are connected. When in use, the feeding tube 10 is placed to ensure that the MARK passes over the intestinal stenosis, acting as a temporary intestinal stent or for patients who are not suitable for intestinal stents or intestinal stenosis.

[0185] The second positioning mark 112 is annular or linear. As an embodiment, the second positioning mark 112 is an annular marking ring, which is set at the proximal end of the nutrition tube 10 through an interference sleeve. As another embodiment, the second positioning mark 112 is a linear strip mark, which is embedded at the proximal position along the direction of the support tube 20. The second positioning mark 112 is made of platinum-iridium alloy material, and the position of the distal end of the nutrition tube 10 in the body can be further clarified through the second positioning mark 112.

[0186] As one of the implementation schemes of this embodiment, Fig. 27 , Fig.28 , Fig.29 , Fig.30 and Fig.31 As shown, a straight-tube feeding tube 10 is provided, wherein a plurality of second interlayer side holes 18 and a plurality of third interlayer side holes 19 are respectively arranged at 10 cm from the proximal end and the distal end of the tube body. The number of the second interlayer side holes 18 and the number of the third interlayer side holes 19 are both 8 to 12.

[0187] Preferably, a second positioning mark 112 is provided between the second interlayer side hole 18 and the third interlayer side hole 19 at the distal end, the second interlayer side hole 18 at the proximal end of the nutrition tube 10 is a plurality of holes, and the third interlayer side holes 19 at the distal end are at least 2 rows. The second interlayer side hole 18 and the proximal end of the nutrition tube 10 are at least 30 cm long.

[0188] A second interlayer channel 110 is provided on the tube body of the nutrition tube 10 along its length direction, one end of the second interlayer channel 110 is connected to a plurality of second interlayer side holes 18 at the proximal end, and a distal end is connected to a plurality of third interlayer side holes 19. The second interlayer side holes 18 and the plurality of third interlayer side holes 19 can be arranged at intervals along the length direction of the nutrition tube 10, or arranged in a spiral shape along the circumference of the nutrition tube 10, or arranged in a dispersed manner along the circumference of the nutrition tube 10 as required.

[0189] As another implementation of this embodiment, Fig.32 , Fig.33 , Fig.34 , Fig.35 and Fig.36As shown, a nutrition tube 10 with a double-lumen joint at the proximal end is provided, which includes a first sleeve joint 11 formed by the proximal end thereof and a second sleeve joint 12 located on one side of the first sleeve joint 11, and the second sleeve joint 12 is connected to the inner cavity of the first sleeve joint 11. A plurality of second interlayer side holes 18 and third interlayer side holes 19 are respectively provided at 10 cm from the proximal end and the distal end of the nutrition tube 10, and the number of the second interlayer side holes 18 and the number of the third interlayer side holes 19 are both 8 to 12.

[0190] According to the need, in order to prevent the backflow of the accumulated liquid, a one-way film valve 111 can be arranged in the second interlayer channel 110 between the second interlayer side hole 18 and the third interlayer side hole 19. The one-way film valve 111 mainly realizes the anti-return effect by the diaphragm valve diaphragm arranged in the second interlayer channel 110, and its structural principle is the conventional film valve structure, which will not be repeated here.

[0191] As a specific application of the push set with the first nutrition tube 10 scheme in this embodiment, the nutrition tube 10 used has a single joint structure, a double lumen and a distal and proximal double side hole structure, the single joint structure is the first sleeve joint 11, and the double lumen is the inner lumen of the nutrition tube 10 and the second sandwich side hole 18. When in use, the nutrition tube 10 is placed to ensure that the second positioning mark 112 passes over the intestinal stenosis, serving as a temporary intestinal stent, and is suitable for patients who are not suitable for intestinal stents.

[0192] The push kit comprises an enteral nutrition tube push kit including a III-type structure nutrition tube 10 with double side holes, a support tube 20 and a pathfinding catheter 30. The enteral nutrition push kit comprises the following steps when used:

[0193] Step 1, insert the feeding tube 10 through the nose to reach the stomach cavity and prevent it from slipping;

[0194] Step 2, insert the support tube 20 through the feeding tube 10, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0195] Step 3, insert the pathfinder catheter 30 and the guide wire therein through the support tube 20, find the pylorus position, and then enter the duodenum and move to the jejunum position;

[0196] Step 4, then control the feeding tube 10 and the support tube 20 to follow the pathfinding catheter 30 to the jejunum, adjust the position of the feeding tube 10 according to the second positioning mark 112, so that the second positioning mark 112 passes over the intestinal stenosis, and acts as a temporary intestinal stent;

[0197] Step 5, retain the feeding tube 10, and withdraw the guide wire, support tube 20 and pathfinding catheter 30 in sequence;

[0198] Step 6, fix the nutrition tube 10, and realize nutrition delivery through the nutrition tube 10, and the patient can also eat liquid food without residue.

[0199] The enteral nutrition tube push kit provided by the present invention can realize the one-time completion of guidewire exploration and nutrition tube placement, avoiding the risk of insufficient guidewire support and slippage, greatly reducing the difficulty and time of surgery, and eliminating the pain of repeated rubbing of the nasal cavity. The one-step placement method using the push kit not only does not have the disadvantages of placement under gastroscopy, but also effectively solves the problem that the existing technology is not easy to adjust the guidewire catheter to the pylorus or output loop, and the difficulty of supporting the guidewire catheter in the gastric cavity, making it easier to deliver the nutrition tube to the distal end.

[0200] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0201] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0202] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An enteral nutrition tube push kit, characterized in that: include: A nutrition tube (10), the nutrition tube (10) is used for insertion through the nose to reach the gastric cavity, and is placed in the jejunum with the help of a support tube, a pathfinding catheter, and a guide wire; A support tube (20), the support tube (20) is used to be inserted through the nutrition tube (10) to reach the gastric cavity and then explore the pylorus or efferent loop; A pathfinder catheter (30) is used to be placed through the support tube (20) to reach the pylorus position, then enter the duodenum and move to the jejunum position.

2. The enteral nutrition tube pushing kit according to claim 1, characterized in that: The nutrition tube (10) is of a straight-tube type, and the proximal end is a two-way joint structure or a three-way joint structure.

3. The enteral nutrition tube pushing kit according to claim 1, characterized in that: At least one side of the tube body of the nutrition tube (10) at a distance of 50 to 60 cm from the proximal end is provided with a through hole (14) that penetrates inside and outside, and the number of the through holes (14) is 8 to 12.

4. The enteral nutrition tube pushing kit according to claim 1, characterized in that: The tube body of the nutrition tube (10) is provided with a plurality of first interlayer side holes (16) which are interconnected at a position 50 to 60 cm from the proximal end, and the number of the first interlayer side holes (16) is 8 to 12.

5. The enteral nutrition tube pushing kit according to claim 1, characterized in that: The tube body of the nutrition tube (10) is provided with a plurality of second interlayer side holes (18) and a plurality of third interlayer side holes (19) at 10 cm from the proximal end and the distal end respectively; Wherein, a plurality of the second interlayer side holes (18) are connected to the third interlayer side holes (19) through a plurality of second interlayer channels (110) opened in the tube wall.

6. The enteral nutrition tube pushing kit according to claim 1, characterized in that: The distal end of the support tube (20) is a curved and pre-molded exposed section (22), the angle of which relative to the length direction is 25 to 90 degrees.

7. The enteral nutrition tube pushing kit according to claim 1, characterized in that: The distal end of the pathfinder catheter (30) is a curved and pre-molded elbow section (33), and the angle of the elbow section (33) relative to its length direction is 3 to 5 degrees.

8. The enteral nutrition tube pushing kit according to claim 1, characterized in that: The pathfinder catheter (30) has a length of 1.8 to 2.0 m, an outer diameter of 1.55 to 1.9 mm, and an inner diameter that can pass through a .38 guide wire.

9. A method for delivering enteral nutrition using the delivery kit as claimed in claim 1, characterized in that: The nutrition tube (10) is an I-type structure without side holes, and specifically comprises the following steps: S11, inserting a feeding tube (10) through the nose to the stomach cavity; S12, inserting the support tube (20) through the nutrition tube (10), and searching for the pylorus or output loop after reaching the gastric cavity; S13, inserting the pathfinder catheter (30) and the guide wire therein through the support tube (20), entering the duodenum after reaching the pylorus and moving to the jejunum, or passing through the narrow section and entering the distal intestinal tract; S14, then controlling the nutrition tube (10) and the support tube (20) to follow the pathfinding catheter (30) to the jejunum; S15, retain the nutrition tube (10) and the guide wire, and withdraw the support tube (20) and the pathfinding catheter (30); S16, fixing the nutrition tube (10), and achieving nutrition delivery through the nutrition tube (10); S17, after the nutrition delivery is completed, the operation is ended with drinking water flushing.

10. A method for delivering enteral nutrition using the delivery kit as claimed in claim 1, characterized in that: The nutrition tube (10) is a type II structure of double interfaces + double lumens + proximal side holes, and specifically comprises the following steps: S21, insert the feeding tube (10) through the nose to reach the stomach cavity and prevent it from slipping; S22, inserting the support tube (20) through the nutrition tube (10), and searching for the pylorus or output loop after reaching the gastric cavity; S23, inserting the pathfinder catheter (30) and the guide wire therein through the support tube (20), finding the pylorus position, and then entering the duodenum and moving to the jejunum position; S24, then controlling the nutrition tube (10) and the support tube (20) to follow the pathfinding catheter (30) to the jejunum, adjusting the position of the nutrition tube (10) through the first positioning mark (13) so that the side hole is placed in the stomach cavity; S25, retaining the nutrition tube (10), and sequentially withdrawing the guide wire, the support tube (20), and the pathfinding catheter (30); S26, fixing the nutrition tube (10), and achieving nutrition delivery through the nutrition tube (10).

11. A method for delivering enteral nutrition using the delivery kit as claimed in claim 1, characterized in that: The nutrition tube (10) is a type III structure of single interface + double lumen + proximal and distal side holes, and specifically comprises the following steps: S31, insert the feeding tube (10) through the nose to reach the stomach cavity and prevent it from slipping; S32, inserting the support tube (20) through the nutrition tube (10), and searching for the pylorus or the efferent loop after reaching the gastric cavity; S33, inserting the pathfinder catheter (30) and the guide wire therein through the support tube (20), finding the pylorus position, and then entering the duodenum and moving to the jejunum position; S34, then controlling the nutrition tube (10) and the support tube (20) to follow the pathfinding catheter (30) to the jejunum, adjusting the position of the nutrition tube (10) according to the second positioning mark (112), so that the second positioning mark (112) passes over the narrow section of the intestine; S35, retaining the nutrition tube (10), and sequentially withdrawing the guide wire, the support tube (20), and the pathfinding catheter (30); S36, fix the nutrition tube (10), and realize nutrition delivery through the nutrition tube (10), and the patient can also eat liquid food without residue.

Images