A visual nasogastric tube device with accurate placement

Abstract

The present application relates to the technical field of nasogastric tube placement, and particularly relates to a visual nasogastric tube device capable of precise placement, which comprises a nasogastric tube and a placement tube sleeved on the outside of the nasogastric tube, and a control box is fixedly sleeved on the outside of the placement tube; a stop unit is installed on the nasogastric tube, a camera and a pressure sensor are fixedly connected to the end of the placement tube away from the nasogastric tube, and a wiping structure for wiping the camera and the pressure sensor respectively is installed on the placement tube; the camera and the pressure sensor are wiped by the wiping structure, which is convenient for image capture of the camera and avoids some contents adhering to the pressure sensor, so that the camera and the pressure sensor do not need to be cleaned by flushing liquid, thereby greatly improving the positioning accuracy and data value of pressure measurement.

Description

Technical Field

[0001] This invention relates to the field of nasogastric tube placement technology, and more particularly to a visual nasogastric tube device that can be precisely placed. Background Technology

[0002] A nasogastric tube is a flexible medical catheter inserted through the nasal cavity, with its tip left in the stomach or intestines (such as the duodenum or jejunum). It is a core tool for clinical enteral nutrition support, drug administration, and gastrointestinal decompression. Its insertion and positioning have long relied on the operator's experience and feel, and are typical "blind insertion" procedures.

[0003] Specifically, after the operator pushes the catheter through the nasal cavity and esophagus into the stomach, if it is necessary to further insert the catheter into the small intestine, it relies on the intestinal peristalsis itself or uses an auxiliary guidewire, repeatedly attempting to pass through the pylorus under X-ray fluoroscopy. The process is time-consuming, the success rate is unstable, and it brings radiation exposure and discomfort to the patient. However, it is worth considering that although the visual nasogastric tube device achieves visualization, the camera lens is quickly contaminated by digestive tract mucus and contents during the insertion process, resulting in a blurred field of vision. Current technologies mostly use water flushing through an independent channel to clean the lens, but this brings new problems. The flushing fluid increases the volume load of the patient's gastrointestinal tract, posing a risk to critically ill patients such as those with heart failure or kidney failure. The fluid disturbance generated by the flushing action itself can seriously interfere with intraluminal pressure measurements that may be performed in the same area, resulting in invalid data.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a visual nasogastric tube device that can be precisely inserted to solve the problems of the above-mentioned flushing fluid increasing the volume load of the patient's gastrointestinal tract, posing a risk to critically ill patients with heart failure, renal failure, etc., and the fluid disturbance generated by the flushing action itself seriously interfering with the intracavitary pressure measurement that may be performed in the same area, resulting in invalid data.

[0006] To achieve the above objectives, the present invention provides a visually implantable nasogastric tube device, comprising a nasogastric tube and an insertion tube sleeved outside the nasogastric tube, wherein a control box is fixedly sleeved outside the insertion tube.

[0007] The nasogastric tube is equipped with a stop unit. A camera and a pressure sensor are fixedly connected to the end of the insertion tube away from the nasogastric tube. A wiping structure for wiping the camera and pressure sensor is installed on the insertion tube. An airbag support unit is installed at the end of the insertion tube away from the control box.

[0008] Optionally, the wiping structure includes a rotating frame disposed at the end of the insertion tube away from the control box, a wiping brush for wiping the camera and pressure sensor respectively fixedly connected to the rotating frame, and a reciprocating mechanism for pushing the rotating frame to swing back and forth installed on the insertion tube.

[0009] Optionally, the reciprocating mechanism includes a fixed housing fixedly installed at the end of the insertion tube away from the control box, a piston block slidably disposed inside the fixed housing, the piston block contacting the inner wall of the fixed housing, a plurality of first stop blocks respectively provided on both sides of the piston block, and the first stop blocks fixedly connected to the inner wall of the fixed housing, a piston plate fixedly connected through the piston block, and the two ends of the piston plate fixedly connected to the two ends of the rotating frame respectively, and an air supply unit adapted to the fixed housing is installed on the insertion tube.

[0010] Optionally, the air supply unit includes two air pipes opened in the insertion tube, and two air holes that cooperate with the air pipes are opened on the inner wall of the fixed shell. The two air holes are located on both sides of the piston block, and two connectors that are adapted to the air pipes are fixedly connected to the insertion tube.

[0011] Optionally, a shielding plate for blocking the camera and pressure sensor is fixedly connected inside the rotating frame.

[0012] Optionally, the airbag support unit includes an elastic airbag sleeved outside the insertion tube. An annular groove for accommodating the elastic airbag is provided on the outer wall of the insertion tube, and the elastic airbag and the inner wall of the annular groove are fixedly connected. The inner wall of the annular groove and the inner wall of one of the ventilation pipes are connected through a through hole, and the air inlet and outlet ends of the elastic airbag are connected to the through hole.

[0013] Optionally, a second stop block is provided at the end of the insertion tube away from the control box. The second stop block and the insertion tube are fixedly connected by an elastic plate. An avoidance groove that cooperates with the elastic plate is provided on the piston plate, and the avoidance groove is located on the side of the elastic plate away from the second stop block.

[0014] Optionally, the insertion tube is provided with two adjusting steel wires. One end of the adjusting steel wire is fixedly connected to the bent part of the insertion tube, and the other end of the adjusting steel wire is fixedly connected to the winding wheel located in the control box. The two adjusting steel wires are wound on the two winding wheels in opposite directions. A first rotating shaft is fixedly connected through one winding wheel, and a second rotating shaft is fixedly connected through the other winding wheel. Both the first and second rotating shafts are rotatably connected to the control box. Two guide tubes for guiding the adjusting steel wires are fixedly connected inside the control box. A control mechanism for controlling the rotation of the first and second rotating shafts is installed on the control box.

[0015] Optionally, the control mechanism includes a first rotating shell disposed on one side of the control box, a second rotating shell disposed on the side of the control box away from the first rotating shell, the second rotating shell and the control box being rotatably connected, the end of the first rotating shaft away from the second rotating shaft being located inside the second rotating shell, and the inner walls of the first rotating shaft and the second rotating shell being connected by a spring, an insertion hole being provided on the second rotating shaft, a prism being slidably disposed in the insertion hole, the prism being fixedly connected to the inner wall of the first rotating shell, and a plug being fixedly connected on the side of the first rotating shell and the second rotating shell away from each other, a clamping plate being slidably sleeved on the outside of the plug, the two clamping plates being connected by a fastener, and a friction element adapted to the control box being installed on the first rotating shell.

[0016] Optionally, the fastener includes a mounting sleeve that is slidably sleeved on the outside of the clamping plate. The two mounting sleeves are fixedly connected by a handle. The mounting sleeves and the clamping plate are connected by several bolts. The sides of the first rotating shell and the second rotating shell that are far apart from each other are in contact with the two clamping plates respectively.

[0017] Optionally, the friction element includes a first friction ring fixedly installed on the inner wall of the first rotating shell, a second friction ring contacting the side of the first friction ring facing the control box, and a plurality of positioning grooves opened on the side of the second friction ring facing the control box, with positioning posts provided in the positioning grooves, and the positioning posts being fixedly connected to the control box.

[0018] Optionally, the stopping unit includes an abutment block disposed inside the nasogastric tube, a metal guide wire is fixedly connected to the abutment block, and the end of the metal guide wire away from the abutment block is located outside the nasogastric tube, the end of the abutment block away from the metal guide wire is in contact with the inner wall of the nasogastric tube, and a feeding hole is provided on the nasogastric tube.

[0019] The beneficial effects of this invention are as follows: By observing the nasal passage, gastric space, and gastric mucosa images through a camera, the device can be confirmed to have successfully entered the stomach. When it is necessary to measure the pressure inside the patient's body, real-time measurement is performed through a pressure sensor. The camera and pressure sensor are wiped by a wiping structure, which facilitates the capture of camera images and avoids the adhesion of contents to the pressure sensor. Physical scraping can directly and thoroughly remove mucus, food residue, and other contaminants adhering to the camera lens and pressure sensor diaphragm, restoring the original cleanliness of the optical window and pressure-sensing diaphragm. The clarity of the field of view is restored immediately, providing a stable and clear image for the camera and an interference-free pressure-sensing interface for the pressure sensor. This is a prerequisite for achieving accurate navigation and measurement. It eliminates the volume burden and electrolyte imbalance risk caused by the flushing fluid, making the operation safer and producing almost no pressure interference. The mechanical wiping action is smooth with minimal disturbance to the fluid environment within the cavity, allowing for near-synchronous cleaning and pressure measurement. This improves operational efficiency and data immediacy. Simultaneously, the airbag support unit supports the end of the inserted tube, significantly reducing image shaking and blurring caused by intestinal peristalsis and body movement. This provides a stable visual platform for detailed observation, thereby improving detection accuracy. Furthermore, the airbag support unit essentially achieves functional occlusion, stabilizing the local intestinal lumen through expansion and significantly attenuating pressure fluctuations caused by distant intestinal contents flow and strong peristalsis. This allows the pressure sensor to measure a more stable and pure local hydrostatic pressure and peristaltic contraction pressure at that specific location, rather than the mixed pressure of the entire intestinal dynamic flow field. It eliminates the need for flushing fluid to clean the camera and pressure sensor, thus greatly improving the positioning accuracy and data value of pressure measurements. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one of the overall structural schematic diagrams of an embodiment of the present invention;

[0022] Figure 2 This is a second schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the insertion tube end in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the annular groove in an embodiment of the present invention;

[0025] Figure 5This is a schematic diagram of the internal structure of the fixed shell according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the nasogastric tube according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the control mechanism according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the disassembled friction component according to an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the second rotating shell in an embodiment of the present invention.

[0030] The diagram is marked as follows:

[0031] 1. Nasogastric tube; 2. Insertion tube; 3. Control box; 4. Camera; 5. Pressure sensor; 6. Rotating frame; 7. Wiping brush; 8. Fixing shell; 9. Piston block; 10. Piston plate; 11. First stop block; 12. Ventilation pipe; 13. Connector; 14. Air hole; 15. Abutment block; 16. Metal guide wire; 17. Feeding port; 18. Second stop block; 19. Elastic plate; 20. Clearance groove; 21. Elastic airbag; 22. Annular groove ; 23. Through hole; 24. Adjusting wire; 25. Winding wheel; 26. Guide tube; 27. First rotating shaft; 28. Second rotating shaft; 29. ​​First rotating shell; 30. Prism; 31. Insertion hole; 32. Second rotating shell; 33. Spring; 34. Insert block; 35. Clamping plate; 36. Mounting sleeve; 37. Handle; 38. Cover plate; 39. Bolt; 40. First friction ring; 41. Second friction ring; 42. Positioning groove; 43. Positioning post. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0033] Example 1, by Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention includes a nasogastric tube 1 and an insertion tube 2 sleeved on the outside of the nasogastric tube 1, and a control box 3 is fixedly sleeved on the outside of the insertion tube 2.

[0034] A stop unit is installed on the nasogastric tube 1. A camera 4 and a pressure sensor 5 are fixedly connected to the end of the insertion tube 2 away from the nasogastric tube 1. A wiping structure for wiping the camera 4 and the pressure sensor 5 is installed on the insertion tube 2. An airbag support unit is installed at the end of the insertion tube 2 away from the control box 3. The visual nasogastric tube device is prepared, and the length of the nasogastric tube 1 is twice the length of the insertion tube 2, providing a basis for the subsequent withdrawal of the insertion tube 2. The operator assists the patient to lie flat, cleans the nasal cavity to reduce the risk of infection, verifies the patient's identity information and the indication for tube insertion, briefly explains the operation procedure to the patient to alleviate their tension, and ensures the patient's cooperation during the operation. Medical staff strictly follow the handwashing procedure, wear sterile gloves, and perform sterile treatment on the tip of the insertion tube 2 and related materials to avoid infection during the operation. Sterile lubricant is applied to the tip of the insertion tube 2, and it is slowly pushed in along the physiological curvature of the patient's nasal cavity to avoid violent operation. The device successfully enters the stomach by observing the nasal passage, gastric space, and gastric mucosa images through camera 4. When it is necessary to measure the pressure in the patient's body, it is measured in real time through pressure sensor 5. The camera 4 and pressure sensor 5 are wiped by a wiping structure to facilitate image capture by camera 4 and to prevent contents from adhering to pressure sensor 5. Physical scraping can directly and thoroughly remove mucus, food residue, and other contaminants adhering to the lens of camera 4 and the diaphragm of pressure sensor 5, restoring the original cleanliness of the optical window and pressure-sensing diaphragm. The clarity of the field of view is restored immediately, providing a stable and clear image for the camera and an interference-free pressure-sensing interface for the pressure sensor. This is a prerequisite for achieving accurate navigation and measurement. It eliminates the volume burden and electrolyte disturbance risk caused by the flushing fluid, making the operation safer and producing almost no pressure interference. The mechanical wiping action is smooth and causes minimal disturbance to the fluid environment within the cavity, enabling cleaning and pressure measurement to be performed almost simultaneously, improving operational efficiency and data immediacy. At the same time, the airbag support unit supports the end of the inserted tube 2, greatly reducing the violent shaking and blurring of images caused by intestinal peristalsis and body movement, providing a stable visual platform for fine observation, thereby improving the accuracy of detection. Furthermore, the support of the airbag support unit essentially achieves functional occlusion, stabilizing the local intestinal lumen through expansion, and significantly attenuating the pressure fluctuation interference caused by the flow of intestinal contents and strong peristalsis at a distance.This allows pressure sensor 5 to measure a more stable and pure local hydrostatic pressure and peristaltic contraction pressure at that specific location, rather than the mixed pressure of the entire intestinal dynamic flow field. It eliminates the need for flushing fluid to clean camera 4 and pressure sensor 5, thus greatly improving the positioning accuracy and data value of pressure measurements. Camera 4 precisely locates the pylorus within the stomach, facilitating the smooth passage of the insertion tube 2 through the pylorus into the duodenum. Camera 4 captures images of the duodenal mucosal folds, using this as a positioning reference, and the device is continuously advanced, pushing the insertion tube 2 from the duodenum into the jejunum. When dense, fine intestinal villi appear in the visual image, it indicates that the device has reached the target location. The matching nasogastric tube 1 is then taken, its tip aligned with the channel of the insertion tube 2, and pushed in a uniform and gentle manner. The nasogastric tube is inserted through the orifice into the jejunum. When the end of the nasogastric tube 1 is inserted to the preset position, the operator uses the stop unit to position the nasogastric tube 1. The core function of the stop unit is to fix the position of the nasogastric tube 1 when the insertion tube 2 is withdrawn from the patient's body, preventing the nasogastric tube 1 from dislodging along with the insertion tube 2. The operator holds the insertion tube 2 and drives it to slowly and smoothly withdraw it from the body through the nasal cavity. The insertion tube 2 slides relative to the nasogastric tube 1. During the withdrawal of the insertion tube 2, avoid pulling it forcefully until the insertion tube 2 is completely withdrawn from the patient's body. Adjust the length of the nasogastric tube 1 outside the nasal cavity. First, use medical tape to fix the nasogastric tube 1 in a butterfly shape at the nasal ala. Then, extend the nasogastric tube 1 down along the cheek to the chin for a second fixation to enhance stability, completing the entire insertion operation.

[0035] Example 2, based on Example 1, is... Figure 2 , Figure 3 , Figure 4 and Figure 5The wiping structure includes a rotating frame 6 located at the end of the insertion tube 2 away from the control box 3. Wiping brushes 7 for wiping the camera 4 and pressure sensor 5 are fixedly connected to the rotating frame 6. A reciprocating mechanism for pushing the rotating frame 6 to swing back and forth is installed on the insertion tube 2. The reciprocating mechanism includes a fixed housing 8 fixedly installed at the end of the insertion tube 2 away from the control box 3. A piston block 9 is slidably disposed inside the fixed housing 8, contacting the inner wall of the fixed housing 8. Several first stop blocks 11 are respectively provided on both sides of the piston block 9, and the first stop blocks 11 are fixedly connected to the inner wall of the fixed housing 8. A piston plate 10 is fixedly connected through the piston plate 10, and both ends of the piston plate 10 are fixedly connected to both ends of the rotating frame 6. An air supply unit adapted to the fixed shell 8 is installed on the insertion tube 2. The air supply unit includes two air pipes 12 opened in the insertion tube 2. Two air holes 14 that cooperate with the air pipes 12 are opened on the inner wall of the fixed shell 8, and the two air holes 14 are located on both sides of the piston block 9. Two connectors 13 adapted to the air pipes 12 are fixedly connected to the insertion tube 2. A shielding plate 38 for shielding the camera 4 and the pressure sensor 5 is fixedly connected inside the rotating frame 6.

[0036] The operator connects the two connectors 13 to the external inflation device. During the insertion of the insertion tube 2, the camera 4 and pressure sensor 5 are shielded by the shield 38. When not in use, the camera 4 and pressure sensor 5 are not directly exposed. When testing is required, air is injected into one of the connectors 13. The air enters the fixed housing 8 through the ventilation pipe 12 and air hole 14. The air pushes the piston block 9 to slide within the fixed housing 8. The piston block 9 drives the piston plate 10 and the rotating frame 6 to move, so that the shield 38 no longer obstructs the camera 4 and pressure sensor 5, until the piston block 9 is aligned with the corresponding... When the stop block 11 contacts the piston block 9, the piston block 9 moves to a preset position and stops, allowing the camera 4 and pressure sensor 5 to take pictures and detect. When the camera 4 and pressure sensor 5 need to be cleaned, air is injected into another ventilation pipe 12. The air can then enter the fixed shell 8 through another air hole 14, which pushes the piston block 9 to move in the opposite direction. Finally, the piston block 9 contacts the other corresponding first stop block 11, and the piston block 9 returns to its initial position and stops. By sequentially injecting air into the two connectors 13, the rotating frame 6 drives the wiping brush 7 to swing back and forth, thus cleaning the camera 4 and pressure sensor 5.

[0037] Example 3, based on Example 2, by Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The airbag support unit includes an elastic airbag 21 sleeved on the outside of the insertion tube 2. An annular groove 22 for accommodating the elastic airbag 21 is formed on the outer wall of the insertion tube 2, and the elastic airbag 21 is fixedly connected to the inner wall of the annular groove 22. The inner wall of the annular groove 22 and the inner wall of one of the ventilation pipes 12 are connected through a through hole 23, and the air inlet and outlet ends of the elastic airbag 21 are connected to the through hole 23. A second stop block 18 is provided at the end of the insertion tube 2 away from the control box 3, and the second stop block 18 and the insertion tube 2 are connected by an elastic... Plate 19 is fixedly connected, and piston plate 10 is provided with a relief groove 20 that cooperates with elastic plate 19. The relief groove 20 is located on the side of elastic plate 19 away from the second stop block 18. The stop unit includes an abutment block 15 disposed in the nasogastric tube 1. A metal guide wire 16 is fixedly connected to the abutment block 15. The end of the metal guide wire 16 away from the abutment block 15 is located outside the nasogastric tube 1. The end of the abutment block 15 away from the metal guide wire 16 is in contact with the inner wall of the nasogastric tube 1. A feeding hole 17 is provided on the nasogastric tube 1.

[0038] When the end of the insertion tube 2 needs to be fixed in the patient's body, air is continuously injected into one of the corresponding connectors 13. When the air pushes the piston block 9 to move, so that the piston block 9 abuts against the corresponding first stop block 11, the piston block 9 stops moving. With the continuous input of air, the air pressure in the ventilation tube 12 increases, and the air enters the elastic airbag 21 through the through hole 23. The elastic airbag 21 expands and contacts the intestinal lumen. The support of the airbag support unit essentially achieves functional occlusion. By expanding, the local intestinal lumen tends to stabilize, greatly reducing the violent shaking and blurring of the image caused by intestinal peristalsis and body movement, providing a stable visual platform for fine observation. When the nasogastric tube 1 is inserted into the insertion tube 2, the nasogastric tube 1 slides relative to the insertion tube 2. When the end of the nasogastric tube 1 abuts against the second stop block 18, the second stop block 18 prevents the nasogastric tube 1 from sliding relative to the insertion tube 2, ensuring that the nasogastric tube 1 stops sliding relative to the insertion tube 2 after sliding to the preset position. When it is necessary to withdraw the insertion tube 2 from the patient's body, the operator drives the metal guide wire 16 and the abutment block 15 to insert into the nasogastric tube 1 until the abutment block 15 abuts against the inner wall of the nasogastric tube 1. At this time, air is drawn into one of the connectors 13, and the piston block 9 drives the piston plate 10 to move, so that the piston plate 10 drives the clearance groove 20 to move to one side of the elastic plate 19. The operator drives the insertion tube 2 to be withdrawn from the patient's body. Since the piston plate 10 no longer supports the elastic plate 19, the insertion tube 2 is relative to the nose. When the gastrointestinal tube 1 slides, the nasogastric tube 1 moves against the second stop block 18. The second stop block 18 drives the elastic plate 19 to bend, and the end of the elastic plate 19 slides into the relief groove 20. At this time, the second stop block 18 moves from the end of the nasogastric tube 1 to the side wall of the nasogastric tube 1, and the insertion tube 2 can slide relative to the nasogastric tube 1. At the same time, the operator grasps the metal guide wire 16 and supports the nasogastric tube 1 through the abutment block 15 located at the end of the metal guide wire 16 to prevent the nasogastric tube 1 from following the insertion tube 2 backward.

[0039] Example 4, based on Example 1, is... Figure 1 , Figure 2 , Figure 7 , Figure 8 and Figure 9As shown, the insertion tube 2 is equipped with two adjusting steel wires 24. One end of the adjusting steel wire 24 is fixedly connected to the bend of the insertion tube 2, and the other end of the adjusting steel wire 24 is fixedly connected to the winding reel 25 located in the control box 3. The two adjusting steel wires 24 are wound on the two winding reels 25 in opposite directions. A first rotating shaft 27 is fixedly connected through one winding reel 25, and a second rotating shaft 28 is fixedly connected through the other winding reel 25. Both the first rotating shaft 27 and the second rotating shaft 28 are rotatably connected to the control box 3. Two guide tubes 26 are fixedly connected to guide the adjusting steel wire 24. A control mechanism for controlling the rotation of the first rotating shaft 27 and the second rotating shaft 28 is installed on the control box 3. The control mechanism includes a first rotating shell 29 located on one side of the control box 3, and a second rotating shell 32 located on the side of the control box 3 away from the first rotating shell 29. The second rotating shell 32 and the control box 3 are rotatably connected. The end of the first rotating shaft 27 away from the second rotating shaft 28 is located inside the second rotating shell 32, and the inner walls of the first rotating shaft 27 and the second rotating shell 32 are connected by a spring. A spring 33 is connected, and a socket 31 is provided on the second rotating shaft 28. A prism 30 is slidably provided in the socket 31. The prism 30 is fixedly connected to the inner wall of the first rotating shell 29. A plug block 34 is fixedly connected to the side of the first rotating shell 29 and the side of the second rotating shell 32 that are far apart. A clamping plate 35 is slidably sleeved on the outside of the plug block 34. The two clamping plates 35 are connected by a fixing member. A friction member adapted to the control box 3 is installed on the first rotating shell 29. The fixing member includes a mounting sleeve 36 that is slidably sleeved on the outside of the clamping plate 35. The two mounting sleeves 36 are connected by a handle. 37. The mounting sleeve 36 and the clamping plate 35 are connected by several bolts 39. The side of the first rotating shell 29 and the second rotating shell 32 that are far apart from each other are in contact with the two clamping plates 35 respectively. The friction component includes a first friction ring 40 fixedly installed on the inner wall of the first rotating shell 29. The side of the first friction ring 40 facing the control box 3 is in contact with a second friction ring 41. The side of the second friction ring 41 facing the control box 3 is provided with several positioning grooves 42. Positioning pins 43 are provided in the positioning grooves 42, and the positioning pins 43 are fixedly connected to the control box 3.

[0040] One end of the adjusting wire 24 is fixedly connected to the bend of the insertion tube 2, and the other end of the adjusting wire 24 is fixedly connected to the winding wheel 25 located inside the control box 3. The first friction ring 40 and the second friction ring 41 are in close contact, and the second friction ring 41 limits the position of the first friction ring 40 to prevent the first friction ring 40 and the first rotating shell 29 from rotating relative to the control box 3. The spring spring 33 applies elastic force to the first rotating shaft 27 to keep the two adjusting wires 24 in a taut state. The bend of the insertion tube 2 is provided with a snake bone, and the end of the adjusting wire 24 is fixedly installed. Mounted on the snake skeleton, when the operator drives the handle 37 and clamp 35 to rotate, the clamp 35 drives the first rotating shell 29 and the second rotating shell 32 to rotate synchronously via the insert block 34. The first rotating shell 29 drives the second rotating shaft 28 to rotate via the prism 30, and the second rotating shaft 28 drives the winding wheel 25 to rotate. The winding wheel 25 pulls the adjusting wire 24, which controls the bending of the snake skeleton. When the handle 37 drives the clamp 35 and insert block 34 to rotate in the opposite direction, the snake skeleton on the insertion tube 2 bends in the opposite direction, allowing control of the direction of the end of the insertion tube 2 for easier bending. The insertion tube 2 passes smoothly through the pylorus. Through the design of the first friction ring 40 and the second friction ring 41, when the operator releases the handle 37, the second friction ring 41 uses friction to position the first rotating shell 29 and the first friction ring 40, preventing the handle 37 from rotating or wobbling relative to the control box 3. The operator then drives the bolt 39 to disengage from the mounting sleeve 36 and the clamping plate 35. The operator then drives the handle 37 and the mounting sleeve 36 to move, causing the mounting sleeve 36 to disengage from the clamping plate 35, releasing the restriction on the position of the clamping plate 35, so that the two clamping plates 35 no longer clamp the first rotating shell 29. The operator drives the clamping plate 35 to disengage from the insert block 34, releasing the pressure on the first rotating shell 29. The operator then drives the first rotating shell 29 to move away from the control box 3, causing the prism 30 to disengage from the insertion hole 31. The first friction ring 40 is no longer in contact with the second friction ring 41, allowing the first rotating shell 29 to be removed from the control box 3. The operator then drives the second friction ring 41 to move away from the control box 3, causing the positioning post 43 to disengage from the positioning groove 42, allowing the second friction ring 41 to be replaced.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A precisely implantable visual nasogastric tube device, comprising a nasogastric tube (1) and an insertion tube (2) sleeved outside the nasogastric tube (1), characterized in that, The insertion tube (2) is externally fixedly fitted with a control box (3); The nasogastric tube (1) is equipped with a stop unit. The insertion tube (2) is fixedly connected to a camera (4) and a pressure sensor (5) at one end away from the nasogastric tube (1). The insertion tube (2) is equipped with a wiping structure for wiping the camera (4) and the pressure sensor (5) respectively. The insertion tube (2) is equipped with an airbag support unit at one end away from the control box (3).

2. The precisely implantable visual nasogastric tube device according to claim 1, characterized in that, The wiping structure includes a rotating frame (6) located at the end of the insertion tube (2) away from the control box (3). A wiping brush (7) for wiping the camera (4) and the pressure sensor (5) is fixedly connected to the rotating frame (6). A reciprocating mechanism for pushing the rotating frame (6) to swing back and forth is installed on the insertion tube (2).

3. The precisely implantable visual nasogastric tube device according to claim 2, characterized in that, The reciprocating mechanism includes a fixed housing (8) fixedly installed at the end of the insertion tube (2) away from the control box (3). A piston block (9) is slidably provided inside the fixed housing (8). The piston block (9) is in contact with the inner wall of the fixed housing (8). Several first stop blocks (11) are provided on both sides of the piston block (9). The first stop blocks (11) are fixedly connected to the inner wall of the fixed housing (8). A piston plate (10) is fixedly connected through the piston block (9). The two ends of the piston plate (10) are fixedly connected to the two ends of the rotating frame (6). An air supply unit adapted to the fixed housing (8) is installed on the insertion tube (2).

4. The precisely implantable visual nasogastric tube device according to claim 3, characterized in that, The gas supply unit includes two ventilation pipes (12) opened in the insertion tube (2). Two air holes (14) that cooperate with the ventilation pipes (12) are opened on the inner wall of the fixed shell (8). The two air holes (14) are located on both sides of the piston block (9). Two connectors (13) that are adapted to the ventilation pipes (12) are fixedly connected to the insertion tube (2).

5. The precisely implantable visual nasogastric tube device according to claim 2, characterized in that, The rotating frame (6) is fixedly connected to a shielding plate (38) for shielding the camera (4) and pressure sensor (5).

6. The precisely implantable visual nasogastric tube device according to claim 4, characterized in that, The airbag support unit includes an elastic airbag (21) sleeved outside the insertion tube (2). An annular groove (22) for accommodating the elastic airbag (21) is provided on the outer wall of the insertion tube (2). The elastic airbag (21) and the inner wall of the annular groove (22) are fixedly connected. The inner wall of the annular groove (22) and the inner wall of one of the ventilation pipes (12) are connected through a through hole (23). The air inlet and outlet ends on the elastic airbag (21) are connected to the through hole (23).

7. The precisely implantable visual nasogastric tube device according to claim 3, characterized in that, The insertion tube (2) is provided with a second stop block (18) at one end away from the control box (3). The second stop block (18) and the insertion tube (2) are fixedly connected by an elastic plate (19). The piston plate (10) is provided with a relief groove (20) that cooperates with the elastic plate (19), and the relief groove (20) is located on the side of the elastic plate (19) away from the second stop block (18).

8. The precisely implantable visual nasogastric tube device according to claim 1, characterized in that, The insertion tube (2) is provided with two adjusting steel wires (24). One end of the adjusting steel wire (24) is fixedly connected to the bent part of the insertion tube (2), and the other end of the adjusting steel wire (24) is fixedly connected to the winding wheel (25) located in the control box (3). The two adjusting steel wires (24) are wound on the two winding wheels (25) in opposite directions. A first rotating shaft (27) is fixedly connected through one winding wheel (25), and a second rotating shaft (28) is fixedly connected through the other winding wheel (25). The first rotating shaft (27) and the second rotating shaft (28) are rotatably connected to the control box (3). Two guide tubes (26) are fixedly connected inside the control box (3) to guide the adjusting steel wires (24). A control mechanism for controlling the rotation of the first rotating shaft (27) and the second rotating shaft (28) is installed on the control box (3).

9. The precisely implantable visual nasogastric tube device according to claim 8, characterized in that, The control mechanism includes a first rotating shell (29) located on one side of the control box (3), and a second rotating shell (32) located on the side of the control box (3) away from the first rotating shell (29). The second rotating shell (32) and the control box (3) are rotatably connected. The end of the first rotating shaft (27) away from the second rotating shaft (28) is located inside the second rotating shell (32). The inner walls of the first rotating shaft (27) and the second rotating shell (32) are connected by a spring (33). An insertion hole (31) is provided on the second rotating shaft (28). A prism (30) is slidably provided in the insertion hole (31). The prism (30) is fixedly connected to the inner wall of the first rotating shell (29). Insert blocks (34) are fixedly connected on the side of the first rotating shell (29) and the second rotating shell (32) away from each other. A clamping plate (35) is slidably sleeved on the outside of the insert block (34). The two clamping plates (35) are connected by a fastener. A friction element adapted to the control box (3) is installed on the first rotating shell (29).

10. The precisely insertable visual nasogastric tube device according to claim 9, characterized in that, The fastener includes a mounting sleeve (36) that is slidably sleeved on the outside of the clamp (35). The two mounting sleeves (36) are fixedly connected by a handle (37). The mounting sleeve (36) and the clamp (35) are connected by several bolts (39). The side of the first rotating shell (29) and the second rotating shell (32) that are far apart from each other are in contact with the two clamps (35).

11. The precisely insertable visual nasogastric tube device according to claim 9, characterized in that, The friction element includes a first friction ring (40) fixedly installed on the inner wall of the first rotating shell (29). The first friction ring (40) is in contact with a second friction ring (41) on the side facing the control box (3). The second friction ring (41) is provided with a plurality of positioning grooves (42) on the side facing the control box (3). Positioning pins (43) are provided in the positioning grooves (42), and the positioning pins (43) are fixedly connected to the control box (3).

12. The precisely implantable visual nasogastric tube device according to claim 1, characterized in that, The stop unit includes an abutment block (15) disposed inside the nasogastric tube (1). A metal guide wire (16) is fixedly connected to the abutment block (15), and one end of the metal guide wire (16) away from the abutment block (15) is located outside the nasogastric tube (1). The other end of the abutment block (15) away from the metal guide wire (16) is in contact with the inner wall of the nasogastric tube (1). A feeding hole (17) is provided on the nasogastric tube (1).

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