Single-connector double-side-hole type nutrition pusher

Abstract

The utility model discloses a single-connector double-side-hole type nutrition pusher which comprises a nutrition tube, a supporting tube and a path finding guide tube, the nutrition tube is movably arranged in the supporting 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 in a straight tube shape, a plurality of second interlayer side holes and a plurality of third interlayer side holes are formed in the positions, away from the near end and the far end, of a canal body of the nutrient canal respectively, and the second interlayer side holes are communicated with the third interlayer side holes through a plurality of second interlayer channels formed in the canal wall. According to the nutrient canal, the structural design of the single-cavity connector, the double cavities and the near-end and far-end double-side holes is adopted, the MARK on the nutrient canal is located between the near-end side hole and the far-end side hole, the near-end side hole and the far-end side hole are communicated, when the nutrient canal is placed, it is guaranteed that the MARK crosses the narrow section of the intestinal tract and serves as a temporary intestinal tract support, a patient can eat residue-free fluid by himself / herself, and nutrition can also be injected through the nutrient canal.

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 single-joint double-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 intestinal stenosis, 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. During this operation, there is still a possibility of 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 intestinal stenosis and proposes a single-joint double-side hole nutrition pusher that can greatly reduce the difficulty of placing a nutrition tube. The nutrition tube used in the device can serve as a temporary intestinal stent, allowing patients to eat residue-free liquid by themselves or inject nutrition through the nutrition tube.

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

[0006] A single-joint double-side hole type nutrition pusher includes a nutrition tube, a support tube and a pathfinder catheter, wherein: the nutrition tube can be movably inserted into the support tube, and the pathfinder catheter can be movably inserted into the support tube; the nutrition tube is a straight cylinder type, and its tube body is respectively provided with a plurality of second interlayer side holes and a plurality of third interlayer side holes at the proximal end and the distal end, and the plurality of second interlayer side holes are connected to the third interlayer side holes through a plurality of second interlayer channels opened in the tube wall.

[0007] Preferably, the length of the nutrition tube is 1.3 to 2.0 m, the outer diameter is 4.35 to 5.33 mm, the inner diameter is 3.0 to 4.05 mm, and a first positioning mark is provided on the tube body 80 to 90 cm away from the proximal end. The first positioning mark is annular or linear.

[0008] Preferably, a one-way film valve is provided in the second interlayer channel between the second interlayer side hole and the third interlayer side hole.

[0009] 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.

[0010] 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.

[0011] Preferably, the distal end of the support tube is a curved and pre-shaped exposed section, and the angle relative to the longitudinal direction thereof is 25 to 90 degrees.

[0012] More preferably, the length of the exposed section is 20 to 30 cm, and the diameter thereof gradually decreases from the proximal end to the distal end.

[0013] Preferably, a third positioning mark is provided on the support tube, and the third positioning mark is annular or linear.

[0014] Preferably, the pathfinder catheter is at least 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;

[0015] The second pathfinder joint is arranged tilted relative to the first pathfinder joint, with an included angle of 30 to 60 degrees.

[0016] Preferably, the distal end of the pathfinder catheter is a curved and pre-shaped elbow section;

[0017] The included angle of the elbow section relative to its length direction is 3 to 5 degrees; the length of the pathfinder catheter is 1.8 to 2.0 meters, the outer diameter is 1.55 to 1.9 mm, and the inner diameter can pass through a guide wire with a diameter of 0.38 mm.

[0018] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0019] 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 single-cavity joint + double-cavity + proximal and distal double-side hole structural design, the MARK on it is located between the proximal and distal side holes, and the proximal and distal side holes are connected. When the nutrition tube is placed, ensure that the MARK passes over the narrow section of the intestine and acts as a temporary intestinal stent, allowing the patient to eat residue-free liquid by himself, and also can inject nutrition through the nutrition tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a single connector with double-sided sandwich side holes for the nutrition tube;

[0021] Figure 2 This is a schematic diagram of the main structure of a single connector with double-sided sandwich side holes for the nutrition tube;

[0022] Figure 3 This is a schematic cross-sectional view of a single connector with double-sided sandwich side holes for a nutrition tube;

[0023] Figure 4 This is a top view of the single connector of the nutrition tube with double-sided sandwich side holes;

[0024] Figure 5 This is a schematic diagram of the overall cross-sectional structure of a single connector with double-sided sandwich side holes for a nutrition tube;

[0025] Figure 6 Schematic diagram of the three-dimensional structure of the support tube;

[0026] Figure 7 Schematic diagram of the main structure of the support tube;

[0027] Figure 8 Schematic diagram of the cross-sectional structure of the support tube;

[0028] Figure 9 Schematic diagram of the top view of the support tube;

[0029] Figure 10 This is a schematic diagram of the three-dimensional structure of the pathfinder catheter;

[0030] Figure 11 This is a schematic diagram of the main structure of the pathfinder catheter;

[0031] Figure 12 This is a schematic diagram of the cross-sectional structure of the pathfinder catheter;

[0032] Figure 13 This is a schematic diagram of the top view of the pathfinder catheter. DETAILED DESCRIPTION

[0033] 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.

[0034] 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".

[0035] The present invention first provides a single-connector, double-side-hole nutrition pusher, which mainly consists of three parts: a nutrition tube 10, a support tube 20, and a pathfinding 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 pathfinding 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 pathfinding 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.

[0036] This single-connector, dual-side-hole nutrition delivery device is designed for patients with intestinal stenosis. It features a single-lumen connector, dual lumens, and proximal and distal side holes. The mark on the tube 10 is located between the proximal and distal side holes, interconnecting the two. During tube placement, the mark is ensured to pass over the narrowed section of the intestine, acting as a temporary intestinal stent or for patients unsuitable for stents. This design allows patients to self-feed with liquids without residue, while also allowing for nutrition to be delivered through the tube.

[0037] The single-connector double-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.

[0038] 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.

[0039] See also Figure 1 、 Figure 6 and Figure 10 As shown, this embodiment provides a single-joint double-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 6 As shown, and the structure of the pathfinder catheter 30 is as shown Figure 10As shown, the feeding tube 10, the support tube 20 and the pathfinding catheter 30 all have a proximal end and a distal end.

[0040] 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.

[0041] See also Figure 1 As shown, unlike the above-mentioned embodiment 1, a pusher set with a specific structural design is used for the special application scenario of patients with intestinal stenosis. This single-connector, double-side-hole nutrition pusher uses a new type of nutrition tube 10. This new nutrition tube 10 has a second interlayer side hole 18 and a plurality of third interlayer side holes 19. A second positioning mark 112 is provided on the tube body between the second interlayer side hole 18 and the plurality of third interlayer side holes 19. This design allows patients to eat liquid food without residue on their own, and nutrition can also be injected through the nutrition tube.

[0042] This new feeding tube 10 features a Type III design with a single-lumen connector, dual lumens, and bilateral proximal and distal side holes. The MARK is located between the proximal and distal side holes of the feeding tube 10, and the proximal and distal side holes are interconnected. During use, the feeding tube 10 is positioned to ensure that the MARK passes over the narrowed section of the intestine, acting as a temporary intestinal stent. This tube is suitable for patients who are not suitable for intestinal stents or have intestinal stenosis.

[0043] In this embodiment, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the feeding tube 10 is straight and has 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.

[0044] In this embodiment, the nutrition tube 10 is made of one or both of polyurethane and polyimide materials. The polyurethane and polyimide used have the characteristics of being soft, elastic, and not easy to breed bacteria.

[0045] 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.

[0046] 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.

[0047] In this embodiment, a first positioning mark 13 is provided on the nutrition tube 10 at a position 80 to 90 cm away from the proximal end. The first positioning mark 13 is annular or linear.

[0048] The second positioning marker 112 is annular or linear. In one embodiment, the second positioning marker 112 is an annular marking ring, which is inserted into the proximal end of the feeding tube 10. In another embodiment, the second positioning marker 112 is a linear strip, which is embedded in the proximal end along the direction of the support tube 20. The second positioning marker 112 is made of platinum-iridium alloy and can further clarify the position of the distal end of the feeding tube 10 within the body.

[0049] As one of the implementation schemes of this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 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 provided 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.

[0050] Preferably, a second positioning mark 112 is provided between the second interlayer side holes 18 and the distal third interlayer side holes 19. The second interlayer side holes 18 at the proximal end of the feeding tube 10 are multiple holes, while the distal third interlayer side holes 19 are arranged in at least two rows. Furthermore, a distance of at least 30 cm is left between the second interlayer side holes 18 and the proximal end of the feeding tube 10.

[0051] A second interlayer channel 110 is defined along the length of the tube 10. One end of the second interlayer channel 110 communicates with a plurality of second interlayer side holes 18 at the proximal end, and a distal end communicates with 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 spaced apart along the length of the tube 10, arranged in a spiral pattern around the tube 10, or dispersedly arranged around the tube 10, as needed.

[0052] As another embodiment of this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, a feeding tube 10 with a double-lumen connector at its proximal end is provided. The feeding tube 10 includes a first sleeve connector 11 formed at its proximal end and a second sleeve connector 12 located on one side of the first sleeve connector 11. The second sleeve connector 12 communicates with the inner lumen of the first sleeve 11. Nutrient tube 10 is provided with a plurality of second interlayer side holes 18 and third interlayer side holes 19, respectively, 10 cm from the proximal and distal ends. The number of second interlayer side holes 18 and third interlayer side holes 19 is 8 to 12.

[0053] If necessary, to prevent backflow of the accumulated fluid, a one-way film valve 111 can be installed 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 uses a diaphragm valve diaphragm installed in the second interlayer channel 110 to achieve a backflow prevention function. Its structural principle is the same as that of a conventional film valve structure and will not be further described here.

[0054] In this embodiment, if Figure 6 、 Figure 7 、 Figure 8 and Figure 9 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] In this embodiment, if Figure 10 、 Figure 11 、 Figure 12 and Figure 13 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 guidewire with a diameter of 0.38 mm. 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 guidewire with a diameter of 0.38 mm; 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 guidewire with a diameter of 0.38 mm; 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 guidewire with a diameter of 0.38 mm.

[0065] 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.

[0066] As a specific application of the single-connector, dual-side-hole nutrition delivery device of this embodiment, the nutrition tube 10 is designed for pancreatitis patients who are comatose or unable to eat independently and require jejunal nutrition support. The nutrition tube 10 adopts an I-type structure without side holes, a straight-tube or dual-lumen connector at the proximal end, and a distal end that reaches the jejunum, allowing it to be used directly as a nutrition tube.

[0067] As a specific application of the push-through set with the first feeding tube 10 described above, this embodiment employs a feeding tube 10 with a single connector, dual lumens, and both distal and proximal side holes. The single connector comprises the first sleeve connector 11, while the dual lumens comprise the inner lumen of the feeding tube 10 and the second interlayer side hole 18. During placement, the feeding tube 10 ensures that the second positioning marker 112 passes over the narrowed section of the intestine, acting as a temporary intestinal stent and suitable for patients who are not suitable for intestinal stents.

[0068] The pusher set comprises a single-joint double-side-hole nutrition pusher with a III-type structure nutrition tube 10 with double side holes, a support tube 20, and a pathfinder catheter 30. The method for pushing enteral nutrition during use specifically includes the following steps:

[0069] Step 1: insert the feeding tube 10 through the nose to reach the gastric cavity and prevent it from slipping;

[0070] Step 2: insert the support tube 20 through the feeding tube 10, and explore the pylorus or efferent loop after reaching the gastric cavity;

[0071] 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;

[0072] 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 according to the second positioning mark 112 so that the second positioning mark 112 passes over the narrow section of the intestine, acting as a temporary intestinal stent.

[0073] Step 5: retain the feeding tube 10 and sequentially remove the guide wire, support tube 20 and pathfinding catheter 30;

[0074] Step 6: Fix the nutrition tube 10, and realize nutrition delivery through the nutrition tube 10. The patient can also eat liquid food without residue.

[0075] The single-connector, double-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 one-step placement method using this pusher kit eliminates the drawbacks of endoscopic placement while effectively addressing the existing issues of difficult guidewire catheter adjustment to the pylorus or efferent loop, as well as the difficulty of supporting the guidewire catheter in the gastric cavity, making distal delivery of nutrition tubes easier.

[0076] 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.

[0077] 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.

[0078] 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 single-joint double-side hole type nutrient pusher, characterized in that: The invention comprises a nutrition tube (10), a support tube (20) and a pathfinding catheter (30), wherein: the nutrition tube (10) can be movably inserted into the support tube (20), and the pathfinding catheter (30) can be movably inserted into the support tube (20); the nutrition tube (10) is a straight tube, and a plurality of second interlayer side holes (18) and a plurality of third interlayer side holes (19) are respectively provided at the proximal end and the distal end of the tube body, and the plurality of 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.

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

3. The single-joint double-side hole type nutrient pusher according to claim 1, characterized in that: A one-way film valve (111) is provided in the second interlayer channel (110) between the second interlayer side hole (18) and the third interlayer side hole (19).

4. The single-joint double-side hole type nutrient pusher according to claim 1, characterized in that: A second positioning mark (112) is provided on the tube body between the second interlayer channel (110) and the third interlayer side hole (19), and the second positioning mark (112) is annular or linear.

5. The single-joint double-side hole type nutrient 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.

6. The single-joint double-side hole type 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), with an angle of 25 to 90 degrees relative to its length direction.

7. The single-joint double-side hole type nutrient pusher according to claim 6, characterized in that: The length of the exposed section (22) is 20 to 30 cm, and its diameter gradually decreases from the proximal end to the distal end.

8. The single-joint double-side hole type nutrient pusher according to claim 1, characterized in that: The support tube (20) is provided with a third positioning mark (23), and the third positioning mark (23) is annular or linear.

9. The single-joint double-side hole type nutrient pusher according to claim 1, characterized in that: The pathfinding catheter (30) is at least a two-way joint structure, comprising a first pathfinding joint (31) formed by its proximal end and a second pathfinding joint (32) located on one side of the first pathfinding 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.

10. The single-joint double-side hole type nutrient pusher according to claim 1, characterized in that: The distal end of the pathfinder catheter (30) is a curved and pre-shaped elbow section (33); The angle of the elbow section (33) relative to its length direction is 3 to 5 degrees; the length of the pathfinder catheter (30) is 1.8 to 2.0 meters, the outer diameter is 1.55 to 1.9 mm, and the inner diameter can pass through a guide wire with a diameter of 0.38 mm.

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