Double-interface side hole type nutrition pusher

Abstract

The utility model discloses a double-interface side hole type nutrition pusher which comprises a nutrition tube, a supporting tube and a path finding guide tube, the supporting tube is movably arranged in the nutrition tube in a penetrating mode, and the path finding guide tube is movably arranged in the supporting tube in a penetrating mode. The nutrient canal is of a two-way joint structure and comprises a first sleeve joint formed by the near end of the nutrient canal and a second sleeve joint located on one side of the first sleeve joint, and a plurality of first interlayer side holes are formed in the near end of a canal body of the nutrient canal. The nutrient canal adopts the structural design of double interfaces, double cavities and the near-end side hole, the far end of the nutrient canal is arranged in the jejunum and can be used as the nutrient canal, the farthest end of the side hole is provided with an MARK mark, and the MARK does not exceed the pylorus when the nutrient canal is arranged, so that the side hole is positioned in the gastral cavity and is used for gastrointestinal decompression, and the nutrient canal is particularly suitable for patients suffering from gastric paralysis and needing enteral nutrition.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments and relates to an enteral nutrition auxiliary pushing device, in particular to a double-interface side-hole type nutrition pusher. Background Art

[0002] Currently, there are two conventional methods for placing feeding tubes: oral placement under digestive endoscopy and nasal placement under DSA. The advantage of placing feeding tubes through the mouth 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. The conventional nasal placement method under DSA has poor support for the catheter guide wire in the gastric cavity segment due to the receptive expansion of the gastric cavity, 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 stomach pylorus or gastric surgery, which increases the difficulty of placing feeding tubes under DSA. In addition, the nasal cavity will be repeatedly rubbed during the operation, causing pain to the patient.

[0003] For patients with gastroparesis who require enteral nutrition, the two conventional methods of placing feeding tubes mentioned above both require placing the guide wire in a satisfactory position before inserting the feeding tube through the guide wire. The entire process is inconvenient to operate and can easily lead to surgical failure due to insufficient support strength or slippage of the guide wire. Utility Model Content

[0004] The utility model is aimed at patients with existing gastroparesis who need enteral nutrition, and proposes a double-interface side-hole nutrition pusher which can greatly reduce the difficulty of placing a nutrition tube. The distal end of the nutrition tube is placed in the jejunum for use as a nutrition tube, and the side hole at its proximal end is located in the gastric cavity and can be used for gastrointestinal decompression.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A dual-interface side-hole nutrition pusher comprises a nutrition tube, a support tube and a pathfinding catheter, wherein the support tube is movably arranged inside the nutrition tube, and the pathfinding catheter is movably arranged inside the support tube;

[0007] The nutrition tube is a double-way joint structure, including a first sleeve joint formed by its proximal end and a second sleeve joint located on one side of the first sleeve joint, and a plurality of first interlayer side holes are opened at the proximal end of the tube body.

[0008] Preferably, the second sleeve joint is arranged obliquely with respect to the first sleeve joint, and the angle thereof is 30-60°.

[0009] Preferably, the length of the nutrition tube is 1.3 to 2.0 m, the outer diameter is 4.35 to 5.33 mm, and the inner diameter is 3.0 to 4.05 mm.

[0010] Preferably, a plurality of mutually connected first interlayer side holes are opened along the tube body of the nutrition tube at a distance of 50 to 60 cm from the proximal end, and the number of the first interlayer side holes is 8 to 12.

[0011] Preferably, a first positioning mark is provided on the nutrition tube at a position 80 to 90 cm away from the proximal end, and the first positioning mark is annular or linear.

[0012] Preferably, the length of the support tube is 1.6 to 1.8 m, which is 20 to 30 cm longer than the length of the nutrition tube, and the outer diameter is 2.6 to 4.0 mm and the inner diameter is 1.56 to 2.0 mm.

[0013] Preferably, the distal end of the support tube is a curved and pre-shaped exposed section;

[0014] Wherein, the angle of the exposed section relative to its length direction is 25 to 90 degrees.

[0015] More preferably, the length of the exposed section is 20 to 30 cm, the outer diameter thereof gradually decreases to 2.6 to 2.95 mm from the proximal end to the distal end, and the inner diameter thereof gradually decreases to 1.63 to 1.96 mm from the proximal end to the distal end.

[0016] Preferably, the pathfinder catheter is a two-way connector structure, comprising a first pathfinder connector formed by its proximal end and a second pathfinder connector located on one side of the first pathfinder connector;

[0017] The second pathfinder joint is arranged tilted relative to the first pathfinder joint, with an included angle of 30 to 60 degrees.

[0018] Preferably, the distal end of the pathfinder catheter is a curved and pre-shaped elbow section, and the angle of the elbow section relative to its length direction is 3 to 5 degrees;

[0019] 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.

[0020] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0021] The double-interface side-hole nutrition pusher provided by the utility model can reduce the difficulty of operation, easily deliver the nutrition through the nasal cavity, help find the pylorus or output loop, reduce the difficulty of operating the nutrition tube and the discomfort caused to the patient by repeated rubbing of the nasal cavity during operation, and also play a good auxiliary role in passing through the narrow section of the intestine; and the nutrition tube adopts a double-interface + double-cavity + proximal side hole structural design, and its distal end is placed in the jejunum and can be used as a nutrition tube. There is a MARK mark at the farthest 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. It is used as gastrointestinal decompression and is particularly suitable for patients with gastroparesis who require enteral nutrition. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the nutrition tube with a single-sided sandwich side hole and a two-way connector structure;

[0023] Figure 2 This is a schematic diagram of the main structure of the nutrition tube with a single-sided sandwich side hole and a two-way connector structure;

[0024] Figure 3 This is a cross-sectional diagram of a nutrition tube with a single-sided sandwich side hole and a two-way connector structure. Figure 1 ;

[0025] Figure 4 This is a cross-sectional diagram of a nutrition tube with a single-sided sandwich side hole and a two-way connector structure. Figure 2 ;

[0026] Figure 5 This 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;

[0027] Figure 6 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;

[0028] Figure 7 This 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;

[0029] Figure 8 This is a schematic diagram of the overall cross-sectional structure of the nutrition tube with a single-sided sandwich side hole and a three-lumen connector;

[0030] Figure 9 Schematic diagram of the three-dimensional structure of the support tube;

[0031] Figure 10 Schematic diagram of the main structure of the support tube;

[0032] Figure 11 Schematic diagram of the cross-sectional structure of the support tube;

[0033] Figure 12 Schematic diagram of the top view of the support tube;

[0034] Figure 13 This is a schematic diagram of the three-dimensional structure of the pathfinder catheter;

[0035] Figure 14 This is a schematic diagram of the main structure of the pathfinder catheter;

[0036] Figure 15 This is a schematic diagram of the cross-sectional structure of the pathfinder catheter;

[0037] Figure 16 This is a schematic diagram of the top view of the pathfinder catheter. DETAILED DESCRIPTION

[0038] 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 is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative in nature and not to limit the present invention.

[0039] The following is a detailed and specific introduction to the present invention through specific embodiments to facilitate a better understanding of the present invention, but the following embodiments do not limit the scope of the present invention. In addition, when describing the orientation of the present invention, the direction closer to the operator during surgery is referred to as "near" and the direction farther away from the operator is referred to as "far".

[0040] The present invention first provides a dual-port side-hole nutrition delivery device, which mainly consists 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. With the guidance of the support tube, the pathfinder catheter, and the guide wire, it is placed in the jejunum, providing support and nutrition delivery. 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. The pathfinder catheter 30 is used to be inserted through the support tube 20 to reach the pylorus and then enter the duodenum and advance to the jejunum.

[0041] The double-port side-hole nutrition pusher is designed for patients with gastroparesis who require enteral nutrition. A double-port + double-lumen + proximal side-hole type nutrition tube 10 is designed: the distal end is placed in the jejunum and used as a nutrition tube. The distal 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.

[0042] The dual-interface side-hole nutrition pusher provided by the utility model can realize the one-time completion of guide wire exploration and nutrition tube placement for patients with different diseases, avoiding the risk of insufficient guide wire support and slippage, greatly reducing the difficulty and time of surgery, and eliminating the pain of repeated rubbing of the nasal cavity.

[0043] In addition, for the application scenarios corresponding to the nutrition tube 10 with this specific structural design, the utility model also provides a corresponding one-step placement method. This one-step method not only avoids 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 segment, making it easier to deliver the nutrition tube to the distal end.

[0044] See also Figure 1 、 Figure 9 and Figure 13 As shown, this embodiment provides a dual-interface side-hole type nutrition pusher, 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 Figure 9 As shown, and the structure of the pathfinder catheter 30 is as shown Figure 13 As shown, the feeding tube 10, the support tube 20 and the pathfinding catheter 30 all have a proximal end and a distal end.

[0045] See also Figure 5 As shown, for the use scenario of patients with gastroparesis who need enteral nutrition, an improved double-interface side-hole nutrition pusher is provided, which adopts a new type of nutrition tube 10. The new type of nutrition tube 10 has a first positioning mark 13 and several first interlayer side holes 16.

[0046] This new feeding tube 10 features a Type II design with dual ports, dual lumens, and a proximal side hole. When used, the distal end of the tube 10 is placed in the jejunum, serving as a feeding tube. The distal end of the side hole is marked with a mark, ensuring it does not extend beyond the pylorus during placement to ensure the side hole is located within the gastric cavity for gastrointestinal decompression. It is intended for patients with gastroparesis requiring enteral nutrition.

[0047] 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 is used for insertion through the nose to reach the stomach cavity. The use of the feeding tube 10 avoids repeated friction on the nasopharyngeal tract during operation, plays a protective role, and also provides a certain degree of support.

[0048] In this embodiment, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the proximal end of the feeding tube 10 has a two-way connector structure and a length of 1.3 to 2.0 meters, with a typical length of 1.3 to 1.5 meters. Depending on the location of intestinal stenosis, a 1.6 to 2 meter long feeding tube can be custom-made. The outer diameter of the feeding 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 feeding tube 10 is 4.65 to 5.0 mm, and the inner diameter is 3.2 to 3.85 mm.

[0049] In one embodiment, the proximal end of the feeding tube 10 is a two-way connector structure, which includes a first sleeve connector 11 formed by the proximal end and a second sleeve connector 12 located on one side of the first sleeve connector 11. The first sleeve connector 11 is used to enter the feeding tube 40, and the second sleeve connector 12 is used to inject water or other liquids. The second sleeve connector 12 on the other side of the first sleeve connector 11 is an integrally formed structure.

[0050] 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 to 60°; preferably, the angle thereof is 32 to 55°; further preferably, the angle thereof is 32 to 50°; more preferably, the angle thereof is 35 to 48°; more preferably, the angle thereof is 35 to 40°.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] In this embodiment, a first positioning mark 13 is provided on the feeding tube 10, located approximately 80 to 90 cm from the proximal end. The first positioning mark 13 is circular or linear. First interlayer side holes 16 communicate with the exterior of the tube body, but not with the lumen of the feeding tube 10. Each first interlayer side hole 16 is interconnected via a first interlayer channel 17 in the tube body.

[0055] As one of the implementation schemes of this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the feeding tube 10 is generally straight-cylindrical, with a plurality of first interlayer side holes 16 defined along the tube body 50 to 60 cm from the proximal end. Eight to twelve first interlayer side holes 16 are located at one end of the feeding tube 10, also known as a single-side hole structure. During use, the first positioning marker 13 at the distal end of the feeding tube 10 is positioned no further than the pylorus to ensure that the first interlayer side holes 16 are located within the gastric cavity for gastrointestinal decompression.

[0056] As another embodiment of this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the proximal end of the nutrition tube 10 is a two-way joint structure, mainly including 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 on one side of the first sleeve joint 11.

[0057] The second sleeve joint 12 communicates with the inner cavity of the first sleeve 11. A plurality of first interlayer side holes 16 are formed along the nutrition tube 10 with the two-way joint structure, 50 to 60 cm from the proximal end. The first interlayer side holes 16 are blind holes formed in the proximal end of the nutrition tube 10. The first interlayer side holes 16 are interconnected through first interlayer channels 17 in the tube body.

[0058] Depending on actual needs, the first interlayer side holes 16 are spaced apart along the length of the feeding tube 10, or distributed in a spiral pattern along the circumference of the feeding tube 10 at its proximal end, or dispersed along the circumference of the feeding tube 10. It is also required that the first positioning mark 13 at the distal end of the feeding tube 10 is placed no further than the pylorus, ensuring that the first interlayer side holes 16 are located in the gastric cavity for gastrointestinal decompression.

[0059] As another embodiment of this embodiment, Figure 5 、 Figure 6 、 Figure 7 and Figure 8, providing a nutrition tube 10 with a three-way joint structure and a single-side hole structure. The nutrition tube 10 mainly includes a first sleeve joint 11, a second sleeve joint 12 and a third sleeve joint 15.

[0060] The first sleeve joint 11 forms the proximal end of the feeding tube 10. The second sleeve joint 12 and the third sleeve joint 15 are located above and below the first sleeve joint 11. The second sleeve joint 12 communicates with the inner lumen of the first sleeve 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 defined in the tube wall.

[0061] As a specific application of the push-through set with the second embodiment of the feeding tube 10, the feeding tube 10 employed in this embodiment has a two-way connector structure, a dual lumen, and a proximal first interlayer side hole 16. The two-way connector structure comprises a first sleeve connector 11 and a second sleeve connector 12, and the dual lumen comprises the inner lumen of the feeding tube 10 and a first interlayer channel 17. During use, the distal end of the feeding tube 10 is placed in the jejunum, serving as a feeding tube. A first positioning mark 13 is provided at the distal end of the first interlayer side hole 16. During placement, the first positioning mark 13 does not extend beyond the pylorus to ensure that the first interlayer side hole 16 is located in the gastric cavity, thereby providing gastrointestinal decompression.

[0062] In this embodiment, if Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, the support tube 20 is a hollow tubular structure with a proximal end and a distal end. Specifically, it has a proximal connector 21 and a distal exposed section 22. It is used for insertion through the feeding 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 locate the output tract and provide support, reducing surgical difficulty and time.

[0063] The length of the support tube 20 is 1.6 to 1.8 meters, which is 20 to 30 cm longer than the length of the nutrition tube 10. Preferably, the length of the support tube 20 is 1.65 to 1.76 meters, which is 22 to 28 cm longer than the length of the nutrition tube 10. More preferably, the length of the support tube 20 is 1.68 to 1.75 meters, which is 23 to 27 cm longer than the length of the nutrition tube 10. Even more preferably, the length of the support tube 20 is 1.68 to 1.72 meters, which is 25 to 26 cm longer than 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 needs to exceed the length of the nutrition tube 10 by 20 to 30 cm. It can be lengthened if necessary.

[0064] The inner and outer diameters of the support tube 20 must correspond to the inner diameter of the feeding tube 10 and the outer diameter of the pathfinder catheter 30 to allow for free insertion of the support tube 20 and the pathfinder catheter 30. Specifically, the outer diameter of the support tube 20 is 2.6-4.0 mm, and the inner diameter of the support tube 20 that matches the inner diameter of the feeding tube 10 is 1.56-2.0 mm, for the purpose of passing a 5-6 French 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 mm. 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. Even 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.

[0065] The distal end of the support tube 20 is a curved and pre-shaped exposed section 22, which has an angle of 25 to 90 degrees relative to its length direction. It adopts a large elbow structure design, which 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 where it exits the nutrition tube 10 is designed with a tapered structure with a gradually decreasing diameter. 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 a 5 to 6F pathfinder catheter 30.

[0066] The support tube 20 is made of polytetrafluoroethylene, nylon 12, or other preferred polymer materials. Both the exposed section 22 and the support tube 20 are injection-molded polymer materials. The exposed section 22 serves to guide the stomach, increase permeability, and reduce intestinal wall damage. The polymer material of the exposed section 22 is designed to be lubricating and durable. 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 a tough material, forms a cannula structure with the pathfinding catheter and guidewire, providing sufficient support in the gastric cavity, facilitating smoother placement of the feeding tube 10.

[0067] The support tube 20 is provided with a third positioning mark 23, which is either annular or linear. This third positioning mark 23 can be an annular marking ring, fitted over the distal end of the support tube 20, or a linear strip, embedded along the length of the support tube 20 at the distal end. Made of a platinum-iridium alloy, this third positioning mark 23 further clarifies the position of the distal end of the support tube 20 within the body.

[0068] In this embodiment, if Figure 13 、 Figure 14 、 Figure 15 and Figure 16 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 inserted through the support tube 20, reaches the pylorus, and then enters the duodenum and advances to the jejunum. The use of the pathfinder catheter 30 can make it easier to pass the guidewire catheter through the narrow section of the intestine and better adapt to the multi-bend structure of the distal jejunum, allowing the guidewire to travel more smoothly and further through the multi-bend structure of the jejunum.

[0069] The pathfinder catheter 30 has a dual-way connector structure, comprising a first pathfinder connector 31 formed at its proximal end and a second pathfinder connector 32 located on either side of the first pathfinder connector 31. The first pathfinder connector 31 and the second pathfinder connector 32 are integrally formed. The first pathfinder connector 31 is used for guidewire insertion, while the second pathfinder connector 32 is used for contrast agent injection. The dual-lumen design of the pathfinder catheter 30 enables simultaneous pathfinder injection, eliminating the need to remove the guidewire before contrast agent injection, as with conventional catheters, making the procedure more convenient.

[0070] 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.

[0071] The distal end of the pathfinder catheter 30 is a curved and pre-shaped 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.

[0072] 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 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. Preferably, the pathfinder catheter 30 has a length of 1.85 to 1.96 m, an outer diameter of 1.60 to 1.85 mm, and an inner diameter that can pass through a .38 guide wire; more preferably, the pathfinder catheter 30 has a length of 1.88 to 1.95 m, an outer diameter of 1.65 to 1.80 mm, and an inner diameter that can pass through a .38 guide wire; more preferably, the pathfinder catheter 30 has a length of 1.90 to 1.93 m, an outer diameter of 1.72 to 1.80 mm, and an inner diameter that can pass through a .38 guide wire.

[0073] As needed, the pathfinder catheter 30 can be made of nylon 12 or other preferred polymer materials. It serves to guide the intestinal tract, improve permeability, and reduce intestinal wall damage. Furthermore, the polymer material used on the surface of the pathfinder catheter 30 is designed to be lubricating and durable, and may be made from one or more of ABS (ABS resin), PLA (polylactic acid), PVA (polyvinyl alcohol), PTFE (polytetrafluoroethylene), and Nylon.

[0074] The enteral nutrition delivery method of the double-interface side-hole nutrition delivery device having a proximal single-end side-hole II-type nutrition tube 10, a support tube 20, and a pathfinder catheter 30 includes the following steps:

[0075] Step 1: insert the feeding tube 10 through the nose to reach the gastric cavity and prevent it from slipping;

[0076] Step 2: insert the support tube 20 through the feeding tube 10, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0077] Step 3: insert the pathfinding catheter 30 and the guide wire therein through the support tube 20, find the pylorus position, and then enter the duodenum and advance to the jejunum;

[0078] Step 4: Then, the feeding tube 10 and the support tube 20 are controlled to follow the pathfinding catheter 30 to the jejunum. The position of the feeding tube 10 is adjusted by the first positioning mark 13 so that the side hole is placed in the gastric cavity for gastrointestinal decompression.

[0079] Step 5: retain the feeding tube 10 and sequentially remove the guide wire, support tube 20 and pathfinding catheter 30;

[0080] Step 6: Fix the nutrition tube 10 and deliver nutrition through the nutrition tube 10.

[0081] The dual-port side-hole nutrition pusher provided by this utility model allows for simultaneous guidewire exploration and nutrition tube placement, eliminating the risk of insufficient guidewire support and slippage, significantly reducing surgical difficulty and time, and eliminating the painful experience of repeated nasal rubbing. Furthermore, the pusher's one-step placement method eliminates the drawbacks of endoscopic placement while effectively addressing the existing difficulties in adjusting the guidewire catheter to the pylorus or efferent loop, as well as the difficulty in supporting the guidewire catheter in the gastric cavity, making distal delivery of the nutrition tube easier.

[0082] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0083] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0084] 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 replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-interface side hole type nutrition pusher, characterized in that: The invention comprises a nutrition tube (10), a support tube (20) and a pathfinding catheter (30), wherein the support tube (20) is movably arranged in the nutrition tube (10), and the pathfinding catheter (30) is movably arranged in the support tube (20); The nutrition tube (10) is a double-way joint structure, comprising 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), and a plurality of first interlayer side holes (16) are opened at the proximal end of the tube body.

2. The dual-interface side hole type nutrition pusher according to claim 1, characterized in that: The second sleeve joint (12) is arranged obliquely relative to the first sleeve joint (11), with an included angle of 30 to 60 degrees.

3. The dual-interface side hole type nutrition pusher according to claim 1, characterized in that: The nutrient tube (10) has 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.

4. The dual-interface side hole type nutrition pusher according to claim 1, characterized in that: A plurality of first interlayer side holes (16) interconnected with each other are opened on the tube body of the nutrition tube (10) at a position 50 to 60 cm from the proximal end along the length direction thereof, and the number of the first interlayer side holes (16) is 8 to 12.

5. The dual-interface side hole type nutrition pusher according to claim 1, characterized in that: A first positioning mark (13) is provided on the nutrition tube (10) at a position 80 to 90 cm from the proximal end. The first positioning mark (13) is annular or linear.

6. The dual-interface side hole type nutrition pusher according to claim 1, characterized in that: The support tube (20) has a length of 1.6 to 1.8 m, which is 20 to 30 cm longer than the length of the nutrition tube (10), and an outer diameter of 2.6 to 4.0 mm and an inner diameter of 1.56 to 2.0 mm.

7. The dual-interface side-hole nutrient pusher according to claim 1, characterized in that: The distal end of the support tube (20) is a curved and pre-shaped exposed section (22); The angle between the exposed section (22) and its length direction is 25-90 degrees.

8. The dual-interface side-hole nutrient pusher according to claim 7, characterized in that: The length of the exposed section (22) is 20 to 30 cm, the outer diameter thereof gradually decreases to 2.6 to 2.95 mm from the proximal end to the distal end, and the inner diameter thereof gradually decreases to 1.63 to 1.96 mm from the proximal end to the distal end.

9. The dual-interface side-hole nutrient pusher according to claim 1, characterized in that: The pathfinder catheter (30) is a two-way joint structure, comprising a first pathfinder joint (31) formed by its proximal end and a second pathfinder joint (32) located on one side of the first pathfinder joint (31); The second pathfinding joint (32) is arranged obliquely relative to the first pathfinding joint (31), and the angle thereof is 30 to 60 degrees.

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