An enteral nutrition delivery device

Abstract

The present invention discloses an enteral nutrition delivery device, which relates to the field of medical nutrition treatment devices. It includes a handle, and a hollow catheter passes through the handle. Two cables for controlling the bending of the catheter are arranged along the length direction inside the catheter wall. The catheter can be inserted into a nutrition tube for enteral nutrition delivery. It also includes a rotating sleeve, which is rotatably connected to the front end of the handle, and a wire winding mechanism for winding the cables is arranged between the rotating sleeve and the handle. When the rotating sleeve rotates, the two cables inside the catheter are in different states of winding and unwinding. The present invention inserts a catheter with adjustable bending degree into the nutrition tube, which can better adapt to the individual differences of different patients and complex anatomical structures, enable the nutrition tube to reach the predetermined position smoothly, effectively solve the problem of difficult insertion of the nutrition tube in the prior art, greatly reduce the difficulty of inserting the nutrition tube, and improve the success rate of catheter insertion.

Description

Technical Field

[0001] The present invention relates to the field of medical nutrition treatment devices, and specifically to an enteral nutrition delivery device. Background Art

[0002] Medical nutrition treatment includes three parts: oral nutritional supplements, tube feeding, and parenteral nutrition. Oral nutritional supplements aim to increase oral nutritional intake by adding nutritional liquids, semi-solids, or powder preparations that can provide various macronutrients and micronutrients to beverages or foods and taking them orally. Tube feeding is a method of inputting nutrients into the body through a catheter and absorbing them through the normal gastrointestinal tract. Parenteral nutrition refers to providing nutrients including amino acids, fats, carbohydrates, vitamins, and minerals to patients through the vein.

[0003] Patients who are unable to eat orally or whose diet combined with ONS cannot reach 60% of the energy target can be given tube feeding. In the existing treatment plan, the common methods for placing a nasoenteric tube are the gastroscopy-assisted method or the X-ray-assisted super-slippery guide wire method.

[0004] The operation steps for placing a nasoenteric tube by the gastroscopy-assisted method are as follows:

[0005] ① Insert a gastric tube into the gastric cavity through the nose;

[0006] ② Apply paraffin oil to the surface of the biopsy forceps or inject a small amount of paraffin oil into the gastric tube to reduce the friction between the biopsy forceps and the gastric tube, and then insert the biopsy forceps into the gastric tube until the front end of the gastric tube;

[0007] ③ Insert a rat-tooth foreign body forceps through the working channel of the gastroscope and extend it out of the end of the scope, clamp the front end of the gastric tube, and then advance the scope to send the gastric tube into the duodenum;

[0008] ④ The assistant fixes the gastric tube, and the foreign body forceps clamp the gastric tube and keep it in place. Withdraw the gastroscope into the gastric cavity, release and retract the foreign body forceps into the gastric cavity;

[0009] ⑤ The assistant pinches the gastric tube and the biopsy forceps in it to make them into one body, and then continues to push the gastric tube into the duodenum until the scale of the gastric tube at the pylorus is 30 - 40 cm, and then withdraw the biopsy forceps in the gastric tube after withdrawing the gastroscope.

[0010] The operation steps for placing a nasoenteric tube by the X-ray-assisted super-slippery guide wire method are as follows:

[0011] ① The patient lies flat, and the catheter is inserted into the stomach by the conventional method of placing a gastric tube;

[0012] ② Further push the catheter near the pylorus, and insert a super-slippery guide wire through the tail of the catheter;

[0013] ③Continue to insert the super-slippery guide wire beyond the catheter tip, and under the assistance of fluoroscopy, send the super-slippery guide wire into and sequentially pass through the pylorus, descending part, horizontal part, and ascending part of the duodenum;

[0014] ④Continue to pass the super-slippery guide wire through the duodenojejunal flexure into the upper jejunum;

[0015] ⑤Further push the super-slippery guide wire distally to the required position, fix the super-slippery guide wire, gently push the catheter along the super-slippery guide wire beyond the tip of the super-slippery guide wire, and pull out the super-slippery guide wire.

[0016] In view of the above related technologies, the gastroscope-assisted method for placing a nasoenteric tube in the existing treatment plan is limited by the outer diameter of the insertion part of the gastroscope (9 - 13 mm). For patients with duodenal stenosis, it is impossible to place the tube through the gastroscope. Although the X-ray-assisted super-slippery guide wire method for placing a nasoenteric tube can observe the tube placement position in real time, it has radiation risks for both the operator and the patient, and there is currently no dedicated medical device, and its ability to handle intestinal stenosis is limited. In summary, the enteral nutrition delivery device in the existing technology is not easy to pass through the narrow position in the intestine. Summary of the Invention

[0017] Based on this, the purpose of the present invention is to provide an enteral nutrition delivery device to solve the technical problem that the enteral nutrition delivery device in the existing technology is not easy to pass through the narrow position in the intestine.

[0018] To achieve the above object, the present invention provides the following technical solution: An enteral nutrition delivery device includes a handle. A hollow catheter passes through the handle. Two cables for controlling the bending of the catheter are arranged along the length direction inside the catheter wall. The catheter can be inserted into a nutrition tube for enteral nutrition delivery. It further includes a rotating sleeve. The rotating sleeve is rotatably connected to the front end of the handle, and a wire winding mechanism for winding the cable is arranged between the rotating sleeve and the handle. When the rotating sleeve rotates, the two cables in the catheter are in different states of being wound and released.

[0019] By adopting the above technical solution, inserting an adjustable-bend catheter into the nutrition tube can better adapt to the individual differences of different patients and complex anatomical structures, enable the nutrition tube to reach the predetermined position smoothly, effectively solve the problem of difficult placement of the nutrition tube in the existing technology, greatly reduce the difficulty of placing the nutrition tube, and improve the success rate of tube placement.

[0020] The present invention is further configured such that a mounting shaft is fixedly connected to the front end of the handle. A first adjusting wheel and a second adjusting wheel are coaxially rotatably connected to the mounting shaft, and a first cable reel and a second cable reel are rotatably connected along the radial direction respectively. A wire threading opening is provided on the mounting shaft. The cable inside the catheter passes through the wire threading opening and is respectively wound around the first cable reel and the second cable reel. A clockwork spring is provided inside the rotating shafts of the first adjusting wheel and the second adjusting wheel. A transmission structure is provided between the first adjusting wheel and the first cable reel, and a transmission structure is also provided between the second adjusting wheel and the second cable reel. When the rotating sleeve rotates forward and backward, it can respectively cause the first cable reel and the second cable reel to rotate and wind up the cable.

[0021] Preferably, the rotation of the first cable reel and the second cable reel is respectively used to wind up the cable, thereby realizing the control of the bending degree of the catheter, enabling the catheter to be bent in a narrow area to adapt to the curvature of the intestine, which is beneficial to improving the success rate of catheter placement.

[0022] The present invention is further configured such that a first fixing frame is fixedly connected to the rotating sleeve towards the first adjusting wheel, and a second fixing frame is fixedly connected to the rotating sleeve towards the second adjusting wheel. The edges of the first adjusting wheel and the second adjusting wheel are annularly and spacedly connected with blocking pieces. The bottom ends of the first fixing frame and the second fixing frame are respectively rotatably connected with a first lever and a second lever for pushing the blocking pieces. When the rotating sleeve rotates forward or backward, only one of the first lever and the second lever can push the blocking piece.

[0023] Preferably, the first lever and the second lever inside the rotating sleeve are used to push the corresponding blocking pieces to realize the rotational adjustment of the first adjusting wheel and the second adjusting wheel respectively, and the first adjusting wheel and the second adjusting wheel respectively drive the cable reel adapted to themselves through the transmission structure.

[0024] The present invention is further configured such that an end cap is fixedly connected to the front end of the mounting shaft. A partition plate is fixedly connected to the end of the rotating sleeve away from the end cap. The partition plate is rotatably connected to the mounting shaft and can also slide along the axis of the mounting shaft. The rotating sleeve is rotatably connected to the end cap and can also slide along the axis of the mounting shaft. An elastic ring is provided between the end cap and the rotating sleeve. A limiting mechanism for restricting the rotation of the rotating sleeve by friction is provided between the rotating sleeve and the handle. When the rotating sleeve slides and presses the elastic ring, the limiting mechanism releases the limit on the rotating sleeve.

[0025] Preferably, when the rotating sleeve slides towards the elastic ring, the rotational limit of the rotating sleeve can be released, so as to facilitate the rotation of the rotating sleeve to wind up the target cable.

[0026] The present invention is further configured such that a friction ring is provided at the end of the rotating sleeve, a friction plate for contacting the friction ring is provided on the handle facing the rotating sleeve, the friction plate contacts the friction ring when the elastic ring is not compressed, and vice versa.

[0027] Preferably, the elastic force of the elastic ring can enable the rotating sleeve to quickly reset to the state where the friction ring contacts the friction plate when not being pushed.

[0028] The present invention is further configured such that a fixed sleeve is connected to one end of the outer wall of the rotating sleeve close to the handle, anti-slip lines are provided on the surface of the fixed sleeve, and it gradually bulges from the end of the rotating sleeve towards the end cover.

[0029] Preferably, the fixed sleeve facilitates the doctor to operate the rotating sleeve with one hand.

[0030] The present invention is further configured such that the friction plate is fixedly connected to the pressing block, the pressing block is slidably connected to the handle along the radial direction of the handle, the top end of the pressing block protrudes from the side surface of the handle, and a spring is provided between the bottom end and the inner wall of the handle. When the pressing block is pressed down, the friction plate is disengaged from the friction ring.

[0031] Preferably, when the pressing block is pressed down, the elastic potential energy of the spring in the first adjusting wheel or the second adjusting wheel can be released to quickly restore the catheter.

[0032] The present invention is further configured such that a toothed ring is provided on the inner wall of one end of the rotating sleeve facing the handle, a transmission shaft is rotatably connected to the end of the handle, a gear meshing with the toothed ring is fixedly connected to one end of the transmission shaft, and a third adjusting wheel is fixedly connected to the other end, and the edge of the third adjusting wheel protrudes from the side surface of the handle.

[0033] Preferably, after the contact between the friction plate and the friction ring is released, rotating the third adjusting wheel can achieve fine adjustment of the rotation angle of the rotating sleeve, which is beneficial to further improving the accuracy of catheter bending.

[0034] The present invention is further configured such that a pressing piece is slidably connected to the outer wall of the handle along the radial direction, the bottom surface of the pressing piece is connected to the top surface of the pressing block, and an adjustment opening is provided at the position of the pressing piece corresponding to the third adjusting wheel.

[0035] Preferably, when the pressing piece is pressed, the contact between the friction plate and the friction ring is released, and at the same time, the third adjusting wheel can be directly pressed on the edge to rotate the third adjusting wheel.

[0036] The present invention is further configured such that wire guides for guiding the cable are installed on both sides of the installation shaft at the wire passing opening.

[0037] Preferably, the wire holder is used to guide the cable and prevent the cable from winding around the transmission structure inside the handle.

[0038] In summary, the present invention mainly has the following beneficial effects:

[0039] By inserting a catheter with adjustable curvature into the feeding tube, the present invention can better adapt to the individual differences of different patients and complex anatomical structures, enabling the feeding tube to reach the predetermined position smoothly, effectively solving the problem of difficult insertion of the feeding tube in the prior art, greatly reducing the difficulty of inserting the feeding tube, and improving the success rate of catheterization.

[0040] The present invention controls the bending of the catheter with adjustable curvature through a cable, enabling the device to be used alone or under the assistance of a gastroscope or under X-ray fluoroscopy, and not being restricted by the narrow section that the gastroscope cannot pass through. The operation is more convenient and fast, reducing the steps and time during catheterization, improving the catheterization efficiency, and reducing the work intensity of medical staff.

[0041] By installing two sets of adjustment mechanisms with different adjustment rates in the handle part, during the operation, the doctor can adaptively select the adjustment mechanism with different rates according to factors such as the insertion depth of the catheter to adjust the curvature of the catheter, improving the control sensitivity of the enteral nutrition delivery device and facilitating further reduction of the catheterization difficulty.

[0042] By arranging a spiral spring in the adjusting wheel, elastic potential energy is accumulated in the spiral spring during the process of rotating the adjusting wheel to adjust the bending of the catheter. After releasing the limit of the friction plate on the rotating sleeve in the handle part, the catheter can be quickly restored, facilitating the advancement of the catheter after passing through the narrow area of the intestine during the operation.

[0043] The present invention realizes the rotational limit of the rotating sleeve through the static friction generated by the contact between the friction plate and the friction ring. In the state where the limit of the friction plate on the rotating sleeve is not released, the catheter can always maintain the adjusted bending state, which is beneficial for the doctor to conveniently control the bending degree of the catheter during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a perspective view of the present invention;

[0045] Figure 2 is a perspective view of the internal structure of the present invention;

[0046] Figure 3 is of the present invention Figure 2 an enlarged view of A in

[0047] Figure 4 is a perspective view of the internal structure of the present invention from another perspective;

[0048] Figure 5 is of the present inventionFigure 4 Enlarged view of B;

[0049] Figure 6 Stereogram of the present invention in the state of removing the rotating sleeve;

[0050] Figure 7 of the present invention Figure 6 Enlarged view of C;

[0051] Figure 8 Stereogram of the rotating sleeve of the present invention;

[0052] Figure 9 Stereogram of the rotating sleeve from another perspective of the present invention.

[0053] Explanation of reference numerals:

[0054] 1. Handle; 101. Mounting shaft; 102. Threading port; 103. End cap; 2. Rotating sleeve; 201. First fixing bracket; 202. Second fixing bracket; 203. Partition plate; 204. Friction ring; 205. Tooth ring; 206. Fixed sleeve; 3. Duct; 4. Cable; 5. First adjusting wheel; 6. Second adjusting wheel; 7. First wire winding wheel; 8. Second wire winding wheel; 9. Wire guide; 10. Blocking piece; 11. First lever; 12. Second lever; 13. Pressing block; 14. Friction plate; 15. Third adjusting wheel; 16. Transmission shaft; 17. Gear; 18. Pressing piece; 19. Guide post; 20. Adjusting port; 21. Elastic ring. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0056] Next, the embodiments of the present invention will be described according to the overall structure of the present invention. Embodiment 1

[0057] A device for enteral nutrition delivery, please refer to Figures 1-9 , including a handle 1, a hollow duct 3 runs through the handle 1. Specifically, two cables 4 for controlling the bending of the duct 3 are arranged along the length direction inside the wall of the duct 3. When one of the cables 4 is pulled and wound, the duct 3 will bend towards the side where the cable 4 is wound. The duct 3 can penetrate into the nutrition tube for enteral nutrition delivery, facilitating the catheterization operation at the position of the narrow intestine.

[0058] It further includes a rotating sleeve 2 which is rotatably connected to the front end of the handle 1, and a wire winding mechanism for winding the cable 4 is arranged between the rotating sleeve 2 and the handle 1. When the rotating sleeve 2 rotates, the two cables 4 in the catheter 3 are in different winding and unwinding states, and the cable 4 can be wound and unwound by rotating the rotating sleeve 2.

[0059] In the above embodiment, specifically, please refer to Figures 2-5 , a mounting shaft 101 is fixedly connected to the front end of the handle 1. A first adjusting wheel 5 and a second adjusting wheel 6 are coaxially and rotatably connected to the mounting shaft 101 respectively, and a first wire winding wheel 7 and a second wire winding wheel 8 for winding the cable 4 are rotatably connected along the radial direction respectively. Specifically, when the catheter 3 is not bent, redundant cables 4 are wound on both the first wire winding wheel 7 and the second wire winding wheel 8.

[0060] Specifically, a wire passing port 102 is arranged on the mounting shaft 101, and the position of the wire passing port 102 corresponds to the position where the cable 4 in the catheter 3 passes out. The cables 4 in the catheter 3 pass out through the wire passing port 102 and are respectively wound on the first wire winding wheel 7 and the second wire winding wheel 8. A wire guiding frame 9 for guiding the cable 4 is installed on both sides of the mounting shaft 101 at the wire passing port 102. The wire guiding frame 9 is used to guide the cable 4 to prevent the cable 4 from being wound on the transmission structure inside the handle 1.

[0061] Furthermore, a clockwork spring is arranged inside the rotating shafts of both the first adjusting wheel 5 and the second adjusting wheel 6. When rotating by itself, the clockwork spring can store elastic potential energy and can drive the rotating sleeve 2 to rotate in the reverse direction when resetting is needed. A transmission structure is arranged between the first adjusting wheel 5 and the first wire winding wheel 7, and a transmission structure is also arranged between the second adjusting wheel 6 and the second wire winding wheel 8. Specifically, the transmission structure is a helical gear structure. Helical gears that mesh with each other are arranged on the edges of the first adjusting wheel 5 and the first wire winding wheel 7, and helical gears that mesh with each other are also arranged on the edges of the second adjusting wheel 6 and the second wire winding wheel 8. When the rotating sleeve 2 rotates forward and backward, it can respectively make the first wire winding wheel 7 and the second wire winding wheel 8 rotate to wind the cable 4. The rotation of the first wire winding wheel 7 and the second wire winding wheel 8 are respectively used to wind the cable 4, thereby realizing the control of the bending degree of the catheter 3, enabling the catheter 3 to be bent in a narrow area into a state adapted to the curvature of the intestine, which is beneficial to improving the success rate of catheter placement.

[0062] In the above embodiment, specifically, please refer to Figures 2-5 、 Figure 8, inside the rotating sleeve 2, a first fixing bracket 201 is fixedly connected towards the first adjusting wheel 5, and a second fixing bracket 202 is fixedly connected towards the second adjusting wheel 6. At the edges of the first adjusting wheel 5 and the second adjusting wheel 6, blocking pieces 10 are connected at intervals in a ring shape. At the bottoms of the first fixing bracket 201 and the second fixing bracket 202, a first lever 11 and a second lever 12 for pushing the blocking pieces 10 are respectively rotatably connected. When the rotating sleeve 2 rotates forward or backward, only one of the first lever 11 and the second lever 12 can push the blocking piece 10. By using the first lever 11 and the second lever 12 inside the rotating sleeve 2 to push the corresponding blocking pieces 10, the rotational adjustment of the first adjusting wheel 5 and the second adjusting wheel 6 can be realized respectively. And the first adjusting wheel 5 and the second adjusting wheel 6 respectively drive the wire take-up wheels adapted to themselves through a transmission structure.

[0063] Specifically, the rotation axes of the first lever 11 and the second lever 12 are both arranged at the middle positions of themselves, and the first fixing bracket 201 and the second fixing bracket 202 are respectively arranged on different sides of the first lever 11 and the second lever 12. For example, when the rotating sleeve 2 rotates, after the first lever 11 contacts the blocking piece 10, it pushes the first adjusting wheel 5 to rotate, and when the second lever 12 contacts the blocking piece 10, it will rotate around its own rotation axis to avoid the blocking piece 10. Embodiment 2

[0064] An enteral nutrition delivery device, please refer to Figures 1-9 , on the basis of Embodiment 1, the difference from Embodiment 1 is that a end cap 103 is fixedly connected to the front end of the mounting shaft 101. A partition 203 is fixedly connected to the end of the rotating sleeve 2 away from the end cap 103. The partition 203 is rotatably connected to the mounting shaft 101 and can also slide along the axis direction of the mounting shaft 101. The rotating sleeve 2 is rotatably connected to the end cap 103 and can also slide along the axis direction of the mounting shaft 101.

[0065] Furthermore, an elastic ring 21 is arranged between the end cap 103 and the rotating sleeve 2. Specifically, in other unpublicized embodiments, the elastic ring 21 can be elastic components such as springs and annular elastic pieces arranged at intervals in a ring shape. This application does not list them one by one here. A limiting mechanism for restricting the rotation of the rotating sleeve 2 by friction is arranged between the rotating sleeve 2 and the handle 1. When the rotating sleeve 2 slides and squeezes the elastic ring 21, the limiting mechanism releases the limit on the rotating sleeve 2. After the rotating sleeve 2 slides towards the elastic ring 21, the rotational limit of the rotating sleeve 2 can be released, so as to facilitate rotating the rotating sleeve 2 to realize the winding of the target cable 4.

[0066] In the above embodiment, specifically, please refer to Figures 2-5, a friction ring 204 is provided at the end of the rotating sleeve 2, and a friction plate 14 for contacting the friction ring 204 is provided on the handle 1 in the direction of the rotating sleeve 2. The friction plate 14 contacts the friction ring 204 when the elastic ring 21 is not compressed, and vice versa. The elasticity of the elastic ring 21 can make the rotating sleeve 2 quickly reset to the state where the friction ring 204 contacts the friction plate 14 when not pushed. When it is necessary to rotate and adjust the rotating sleeve 2 to make it rotate, push the rotating sleeve 2 forward and rotate it. After releasing the hand, the rotating sleeve 2 will automatically reset.

[0067] Further, a fixed sleeve 206 is connected to one end of the outer wall of the rotating sleeve 2 close to the handle 1. The surface of the fixed sleeve 206 is provided with anti-slip lines and gradually bulges from the end of the rotating sleeve 2 towards the end cover 103. The anti-slip lines are convenient for increasing the friction between the fingers and the fixed sleeve 206 when the doctor wears gloves and rotates the rotating sleeve 2. The bulge of the fixed sleeve 206 is convenient for the doctor to use the thumb to push and rotate the rotating sleeve 2. The fixed sleeve 206 is convenient for the doctor to operate the rotating sleeve 2 with one hand. Embodiment III

[0068] An enteral nutrition delivery device, please refer to Figures 1-9 , based on Embodiment II, the difference from Embodiment II is that the friction plate 14 is fixedly connected to the pressing block 13. The pressing block 13 is slidably connected to the handle 1 along the radial direction of the handle 1. The friction plate 14 and the friction ring 204 can be separated from each other in two ways. One is the axial sliding of the rotating sleeve 2 towards the end cover 103, and the other is the radial sliding of the friction plate 14 towards the center of the handle 1 along the handle 1.

[0069] Further, the top end of the pressing block 13 protrudes from the side surface of the handle 1, and a spring for resetting the pressing block 13 is provided between the bottom end and the inner wall of the handle 1. When the pressing block 13 is pressed down, the friction plate 14 is separated from the friction ring 204. When the pressing block 13 is pressed down, the elastic potential energy of the clockwork spring in the first adjusting wheel 5 or the second adjusting wheel 6 can be released to quickly restore the catheter 3.

[0070] In the above embodiments, specifically, please refer to Figures 4-7 , a toothed ring 205 is provided on the inner wall of one end of the rotating sleeve 2 facing the handle 1. A transmission shaft 16 is rotatably connected to the end of the handle 1. One end of the transmission shaft 16 is fixedly connected with a gear 17 meshing with the toothed ring 205, and the other end is fixedly connected with a third adjusting wheel 15. The edge of the third adjusting wheel 15 protrudes from the side surface of the handle 1. After the contact between the friction plate 14 and the friction ring 204 is released, rotating the third adjusting wheel 15 can realize fine adjustment of the rotation angle of the rotating sleeve 2, which is beneficial to further improving the bending accuracy of the catheter 3.

[0071] Specifically, in order to maintain the engagement between the gear 17 and the gear ring 205 when the rotating sleeve 2 slides along the axial direction, the width of the gear ring 205 is greater than the width of the gear 17, and the gear 17 is located at the end of the gear ring 205 away from the handle 1 when the rotating sleeve 2 is not sliding. Similarly, the width of the blocking plate 10 matched with the first lever 11 and the second lever 12 is also wider than the first lever 11 and the second lever 12, but the first lever 11 and the second lever 12 are located at the end of the blocking plate 10 close to the handle 1 when the rotating sleeve 2 is not sliding.

[0072] Furthermore, a pressing plate 18 is radially and slidably connected to the outer wall of the handle 1, and the bottom surface of the pressing plate 18 is connected to the top surface of the pressing block 13. The pressing plate 18 is provided with an adjustment port 20 at a position corresponding to the third adjusting wheel 15. When the pressing plate 18 is pressed, the contact between the friction plate 14 and the friction ring 204 is released, and the third adjusting wheel 15 can be rotated directly by pressing the edge of the third adjusting wheel 15. Specifically, a guide column 19 is fixedly connected to the edge of the pressing plate 18 toward the handle 1, and the guide column 19 penetrates into the handle 1 and is slidably connected to the inside of the handle 1.

[0073] When the enteral nutrition delivery device is used for a specific operation, the catheter 3 is first inserted into the nutrition tube for enteral nutrition delivery, and the super-smooth guide wire is inserted through the tail of the catheter 3. During the catheter placement process, the bending angle of the catheter 3 is continuously adjusted so that the catheter 3 can quickly pass through the narrow area in the intestine. After the nutrition tube is pushed to the required position, the super-smooth guide wire and the catheter 3 are withdrawn. The specific principle of adjusting the bending of the catheter 3 is as follows:

[0074] Hold the handle 1, press the fixed sleeve 206 with your thumb, and push the rotating sleeve 2 toward the elastic ring 21, so that the rotating sleeve 2 moves in the axial direction and squeezes the elastic ring 21, so that the friction plate 14 and the friction ring 204 are separated from each other, and then the rotating sleeve 2 can be rotated. After releasing the hand, the elastic force of the elastic ring 21 automatically resets the rotating sleeve 2. After the friction plate 14 contacts the friction ring 204, it will limit the rotation of the rotating sleeve 2, so that the catheter 3 maintains the required bending state;

[0075] As the rotating sleeve 2 rotates, one of the first lever 11 and the second lever 12 can drive the corresponding blocking piece 10 to rotate. For example, when the first lever 11 drives the blocking piece 10 to rotate, the first adjusting wheel 5 and the rotating sleeve 2 can rotate synchronously, and when the second lever 12 contacts the corresponding blocking piece 10, it will rotate around its own rotating shaft to avoid the blocking piece 10. The first adjusting wheel 5 rotates to drive the first take-up wheel 7 to rotate and reel in one of the cables 4 through the bevel gear structure, and the other cable 4 is pulled due to the bending of the guide tube 3, so that the second take-up wheel 8 is in a synchronous release state. The second take-up wheel 8 drives the second adjusting wheel 6 to rotate through the bevel gear structure, and the rotation direction of the second adjusting wheel 6 is opposite to that of the first adjusting wheel 5.

[0076] When it is necessary to fine-tune the bending degree of the catheter 3, press the position of the adjustment port 20 of the pressing piece 18. While pressing down the pressing piece 18, the thumb touches the third adjustment wheel 15. Since the pressing piece 18 is pressed down, the pressing block 13 is pressed down, and then the friction ring 204 is separated from the friction piece 14. At this time, rotating the third adjustment wheel 15 can achieve fine-tuning of the rotation angle of the rotating sleeve 2. After releasing the hand after the fine-tuning is completed, the pressing block 13 is reset by the spring elastic force, and the friction ring 204 is restored to contact with the friction piece 14;

[0077] When it is necessary to restore the catheter 3, press the position of the pressing piece 18 corresponding to the pressing block 13, without pressing the third adjustment wheel 15. The friction ring 204 is separated from the friction piece 14. Then, under the action of the spring in the first adjustment wheel 5 or the second adjustment wheel 6 rotating shaft, the rotating sleeve 2 can be driven to rotate by the first adjustment wheel 5 or the second adjustment wheel 6. The first wire reel 7 or the second wire reel 8 that originally wound the wire unwinds the wire, while the first wire reel 7 or the second wire reel 8 that originally unwound the wire winds the wire, quickly completing the restoration of the catheter 3.

[0078] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and are not limitations of the invention. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations that do not contribute creatively to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A device for enteral nutrition delivery, characterized in that: include: A handle (1), wherein a hollow catheter (3) is passed through the handle (1), two cables (4) for controlling the bending of the catheter (3) are arranged in the wall of the catheter (3) along the length direction, and the catheter (3) can be inserted into a nutrition tube for enteral nutrition delivery; A rotating sleeve (2) is rotatably connected to the front end of a handle (1), and a wire-reeling mechanism for winding up a cable (4) is arranged between the rotating sleeve (2) and the handle (1). When the rotating sleeve (2) rotates, the two cables (4) in the guide tube (3) are in different retracted and released states. The front end of the handle (1) is fixedly connected to a mounting shaft (101). The mounting shaft (101) is coaxially rotatably connected to a first adjusting wheel (5) and a second adjusting wheel (6), and is radially rotatably connected to a first wire-reeling wheel (7) and a second wire-reeling wheel (8). The mounting shaft (101) is provided with a threading opening (102). The cable (4) in the guide tube (3) is passed through the threading opening (102) and is wound around the first wire-reeling wheel (7) and the second wire-reeling wheel (8). The rotating shafts of the first adjusting wheel (5) and the second adjusting wheel (6) are both provided with springs. A transmission structure is arranged between the first and second adjusting wheels (7), and a transmission structure is also arranged between the second adjusting wheel (6) and the second take-up wheel (8). When the rotating sleeve (2) rotates forward or reversely, the first take-up wheel (7) and the second take-up wheel (8) can respectively rotate to reel in the cable (4). A first fixing frame (201) is fixedly connected to the first adjusting wheel (5) in the rotating sleeve (2), and a second fixing frame (202) is fixedly connected to the second adjusting wheel (6). The edges of the first adjusting wheel (5) and the second adjusting wheel (6) are both connected with blocking plates (10) in an annular manner at intervals. The bottom ends of the first fixing frame (201) and the second fixing frame (202) are respectively connected with a first lever (11) and a second lever (12) for pushing the blocking plate (10). When the rotating sleeve (2) rotates forward or reversely, only one of the first lever (11) and the second lever (12) can push the blocking plate (10).

2. The enteral nutrition delivery device according to claim 1, characterized in that: The front end of the installation shaft (101) is fixedly connected to an end cover (103); the end of the rotating sleeve (2) away from the end cover (103) is fixedly connected to a partition plate (203); the partition plate (203) is rotatably connected to the installation shaft (101) and can also slide along the axial direction of the installation shaft (101); the rotating sleeve (2) is rotatably connected to the end cover (103) and can also slide along the axial direction of the installation shaft (101); an elastic ring (21) is arranged between the end cover (103) and the rotating sleeve (2); a limiting mechanism for limiting the rotation of the rotating sleeve (2) by friction is arranged between the rotating sleeve (2) and the handle (1); when the rotating sleeve (2) slides and squeezes the elastic ring (21), the limiting mechanism releases the limit on the rotating sleeve (2).

3. The enteral nutrition delivery device according to claim 2, characterized in that: A friction ring (204) is arranged at the end of the rotating sleeve (2), and a friction plate (14) for contacting the friction ring (204) is arranged on the handle (1) in the direction of the rotating sleeve (2), wherein the friction plate (14) contacts the friction ring (204) when the elastic ring (21) is not compressed, and does not contact the friction ring (204) otherwise.

4. The enteral nutrition delivery device according to claim 3, characterized in that: A fixed sleeve (206) is connected to one end of the outer wall of the rotating sleeve (2) close to the handle (1); the surface of the fixed sleeve (206) is provided with anti-slip grooves and gradually bulges from the end of the rotating sleeve (2) toward the end cover (103).

5. The enteral nutrition delivery device according to claim 3, characterized in that: The friction plate (14) is fixedly connected to the pressing block (13); the pressing block (13) is connected to the handle (1) by sliding along the radial direction of the handle (1); the top end of the pressing block (13) protrudes from the side of the handle (1), and a spring is arranged between the bottom end and the inner wall of the handle (1); when the pressing block (13) is pressed down, the friction plate (14) is out of contact with the friction ring (204).

6. The enteral nutrition delivery device according to claim 5, characterized in that: A toothed ring (205) is provided on the inner wall of one end of the rotating sleeve (2) facing the handle (1); the end of the handle (1) is rotatably connected to a transmission shaft (16); one end of the transmission shaft (16) is fixedly connected to a gear (17) meshing with the toothed ring (205); and the other end is fixedly connected to a third adjusting wheel (15); the edge of the third adjusting wheel (15) protrudes from the side of the handle (1).

7. The enteral nutrition delivery device according to claim 6, characterized in that: The outer wall of the handle (1) is slidably connected with a pressing plate (18) in the radial direction, the bottom surface of the pressing plate (18) is connected to the top surface of the pressing block (13), and the pressing plate (18) is provided with an adjustment port (20) at a position corresponding to the third adjustment wheel (15).

8. The enteral nutrition delivery device according to claim 1, characterized in that: The installation shaft (101) is provided with a wire guide frame (9) for guiding the cable (4) on one side of the threading opening (102).

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