A rope-driven adjustable angle nasogastric tube guiding device

Abstract

The present application relates to the technical field of medical intervention catheterization apparatus. And disclose a kind of angle of adjustable nasal feeding tube guiding device of rope drive, including control host computer, rope drive flexible adjusting section and front end camera guiding end head, flexible adjusting section adopts inner and outer double-layer coaxial hollow pipe structure, outer layer is corrugated protective sleeve, inner layer is independent nasal feeding tube conveying channel, closed wiring cavity is formed between double-layer pipe line, partition arrangement traction cable and camera circuit, realize pipe line conveying and line wiring complete isolation.End head and sleeve adopt circumferential ring around sealing cooperation structure, built-in sealing rubber ring realizes assembly gap complete plugging, can effectively block body fluid penetration.The present application realizes nasopharyngeal cavity visualization by relying on front end camera structure, cooperates with independent conveying channel to constrain catheter track, avoids mucous membrane scratch damage, can complete integrated operation of path exploration and tube feeding.At the same time, front end head can be quickly disassembled and replaced separately, realize end head disposable use, clinical mode of host computer and sleeve reuse.

Description

Technical Field

[0001] This invention relates to the field of medical interventional catheterization technology, specifically to a rope-driven adjustable-angle nasogastric tube guiding device. Background Technology

[0002] Currently, nasogastric tube placement in clinical practice mostly adopts the traditional blind insertion method, which relies entirely on the experience of medical staff to judge the placement path. This method is highly random and has a low error tolerance, making it easy for problems such as catheter deviation, accidental entry into the airway, and abrasion damage to the nasopharyngeal and esophageal mucosa to occur. It can also easily lead to complications such as choking and infection, and the success rate of placement is difficult to guarantee.

[0003] Existing visual guidance devices mostly employ a single-layer tubing structure, with the internal delivery channel and wiring cavity interconnected. Nasopharyngeal secretions and nutrient solutions generated during cannulation can easily seep into the wiring and cable placement area. Long-term use can easily lead to short circuits, corrosion and breakage of the traction cable, resulting in a high failure rate and short service life. Furthermore, existing devices often use threaded connections between the ends and the cannulas, making disassembly and cleaning cumbersome and inconvenient. Individual replacement of contaminated ends is not possible, and most devices must be scrapped entirely, leading to high clinical consumable costs.

[0004] In addition, conventional flexible guide structures are prone to problems such as tube diameter reduction, steel cable friction loss, and joint loosening when bent and deformed. They have high resistance to tube insertion and frequent jamming, and cannot take into account the safety of tube insertion, device durability and clinical economy. They are difficult to meet the needs of modern precise, efficient and low-cost clinical tube insertion. Summary of the Invention

[0005] The purpose of this invention is to provide a rope-driven, adjustable-angle nasogastric tube guide device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rope-driven adjustable angle nasogastric tube guide device, comprising a rope-driven flexible adjustment section, a camera guide end, and a control host, wherein the rope-driven flexible adjustment section includes a guide device body, and a circumferential sealing fit structure is provided between the front end of the guide device body and the camera guide end. The main body of the guiding device is equipped with an inner and outer double-layer coaxial hollow pipeline. The outer pipeline is a spiral corrugated protective sleeve covering the rope-driven universal joint, and the inner pipeline is an independent through-type nasogastric tube delivery channel. The nasogastric tube delivery channel independently constrains the trajectory of the nasogastric tube, limiting radial deviation of the catheter during insertion. The outer and inner layers of the pipeline enclose each other to form a closed annular wiring cavity, and a traction steel wire rope and a camera signal line are laid inside the annular wiring cavity; The circumferential sealing structure includes an annular silicone sealing ring and an annular groove block. The annular silicone sealing ring is assembled at the head and tail of the camera guide end, and the annular groove block is formed at the front end of the spiral corrugated protective sleeve. The annular silicone sealing ring is squeezed and filled in the assembly gap after clamping, preventing nasopharyngeal fluid and mucus from penetrating into the annular wiring cavity. The control host is equipped with a handle, and a channel entrance is opened in the center of the rear of the control host. The nasogastric tube passes through the channel entrance into the nasogastric tube delivery channel, and extends through the double-layer coaxial pipeline to the guide port of the camera guide end. A visual display is installed at the top of the rear of the control unit.

[0007] As a preferred technical solution of the present invention, the nasogastric tube delivery channel is made of highly elastic medical soft tubing, and the outer spiral corrugated protective sleeve is reserved for axial expansion and contraction deformation. When the rope-driven flexible adjustment section is pulled by the traction steel wire rope and undergoes bending deformation, the outer spiral corrugated protective sleeve compensates for the length difference caused by bending by corrugation expansion and contraction, and the nasogastric tube delivery channel bends synchronously and adaptively.

[0008] As a preferred embodiment of the present invention, the camera guide end is provided with an independent micro-wiring transition cavity, in which the camera signal line end and the front end of the traction steel wire rope are all housed and arranged.

[0009] As a preferred embodiment of the present invention, the camera guide end is a disposable sterile consumable, and the control host and the spiral corrugated protective sleeve can be repeatedly disinfected and reused.

[0010] As a preferred technical solution of the present invention, a high-definition camera probe is embedded in the front end face of the camera guide end. The lens of the high-definition camera probe faces outward and is in the same direction as the nasogastric tube. It can directly view the nasopharyngeal cavity channel in front, collect images of the tube insertion path in real time, and transmit them to a visual display through a camera signal line.

[0011] As a preferred embodiment of the present invention, the traction wire rope and the camera signal line are arranged in a ring-shaped cable cavity, which is completely isolated from the nasogastric tube delivery channel, so as to avoid the nutrient solution and nasopharyngeal secretions from coming into contact with the traction wire rope and the camera signal line, and to prevent the traction wire rope from rusting and breaking, and the camera signal line from short-circuiting.

[0012] As a preferred technical solution of the present invention, each corrugated section of the spiral corrugated protective sleeve has an integrally formed axial limiting rib on its inner wall. The axial limiting rib abuts against the outer periphery of the internal series universal joint to form an axial anti-disengagement limit, preventing the universal joint from axially stretching and disengaging when it bends. The axial limiting rib can also separate each group of traction steel wire ropes to prevent the traction steel wire ropes from having large-area frictional contact with the inner wall of the spiral corrugated protective sleeve.

[0013] Compared with the prior art, the beneficial effects of the present invention are: (1) A rope-driven adjustable angle nasogastric tube guiding device, wherein a spiral corrugated protective sleeve (outer tube) and a nasogastric tube delivery channel (inner tube) are set inside the main body of the guiding device, and a closed annular cable cavity is formed between the two; the nasogastric tube is constrained by the inner nasogastric tube delivery channel throughout the entire process, which can limit the radial displacement of the catheter and avoid the catheter scraping the nasopharyngeal mucosa during insertion.

[0014] (2) A rope-driven adjustable angle nasogastric tube guiding device, which arranges the traction steel wire rope and camera signal line in a ring-shaped cable cavity, completely isolated from the delivery channel, so that the nutrient solution and nasopharyngeal secretions will not corrode the steel cable and line, and eliminate the faults of steel wire rope corrosion and breakage and camera line short circuit; at the same time, the outer spiral corrugated protective sleeve has reserved expansion and contraction margin, and the length difference is compensated by the corrugation expansion and contraction when bending, and the inner nasogastric tube delivery channel adapts to bending, and the inner diameter of the pipeline is constant under any bending angle, so that the nasogastric tube is pushed without jamming, realizing the integrated operation of exploration and tube delivery without changing the instrument.

[0015] (3) A rope-driven adjustable angle nasogastric tube guide device, which consists of an annular silicone sealing ring and an annular groove block through a circumferential sealing fit structure. The annular silicone sealing ring is assembled at the end of the camera guide end. After locking, it is squeezed to fill the assembly gap, blocking the penetration of nasopharyngeal fluid and mucus into the annular cable cavity in all directions. The camera guide end and the spiral corrugated protective sleeve can be quickly disassembled and separated axially without screwing. It is convenient to replace the contaminated end separately and to disassemble and clean the internal universal joint and traction steel wire rope. The sealing structure isolates contaminants for a long time.

[0016] (4) A rope-driven adjustable angle nasogastric tube guiding device, by setting an independent micro-wire transition cavity, the camera signal line end and the front end of the traction steel wire rope are all housed in the micro-wire transition cavity; when the camera guide end is disassembled, the micro-wire transition cavity is simultaneously isolated from the annular wire cavity, and the contaminated body fluid is only retained inside the camera guide end. Therefore, the camera guide end can be used as a disposable sterile consumable, and the control host and the spiral corrugated protective sleeve can be repeatedly disinfected and reused, reducing the department's consumable expenses; the high-definition camera probe is embedded in the front end face of the camera guide end, with the lens facing outward and in the same direction as the nasogastric tube extension direction, which can directly view the nasopharyngeal cavity channel and collect tube placement images in real time and transmit them to the visual display.

[0017] (5) A rope-driven adjustable angle nasogastric tube guide device, wherein an axial limiting rib is integrally formed on the inner wall of each corrugated section of the spiral corrugated protective sleeve, and the axial limiting rib abuts against the outer periphery of the internal series universal joint to form an axial anti-disengagement limiting structure. When the rope-driven flexible adjustment section is bent significantly, the universal joint will not be axially stretched and disengaged, ensuring the overall structural connection stability. At the same time, the axial limiting rib separates each group of traction steel wire ropes from each other, avoiding large-area friction contact between the traction steel wire ropes and the inner wall of the spiral corrugated protective sleeve when they are pulled back and forth, reducing the wear and tear of the steel wire ropes, and improving the durability of the device after repeated bending. Attached Figure Description

[0018] Figure 1 This is a side view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram showing the connection relationship between the main body of the guiding device and the camera guide end of the present invention; Figure 4 This is a schematic diagram of the internal connection relationship of the main body of the guiding device of the present invention; Figure 5 This is a schematic diagram showing the connection relationship between the circumferential sealing fit structure and the camera guide end of the present invention; Figure 6 This is a schematic diagram of the overall control host of the present invention; Figure 7 This is a schematic diagram of the camera guide end and the nasogastric tube delivery channel of the present invention.

[0019] In the diagram: 10. Rope-driven flexible adjustment section; 101. Main body of the guiding device; 1011. Spiral corrugated protective sleeve; 1012. Nasogastric tube delivery channel; 1013. Annular wiring cavity; 1014. Traction wire rope; 1015. Camera signal line; 1016. Axial limiting rib; 20. Camera guide end; 201. Circumferential sealing fit structure; 2011. Annular silicone sealing ring; 2012. Annular groove block; 202. Miniature wiring transition cavity; 203. High-definition camera probe; 30. Control host; 301. Handle; 302. Channel entrance; 303. Visual display. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: Please refer to Figure 1-2A rope-driven adjustable angle nasogastric tube guiding device includes a rope-driven flexible adjustment section 10, a camera guide end 20, and a control host 30. The rope-driven flexible adjustment section 10 includes a guiding device body 101, and a circumferential sealing fit structure 201 is provided between the front end of the guiding device body 101 and the camera guide end 20. The main body 101 of the guiding device is provided with an inner and outer double-layer coaxial hollow pipeline. The outer pipeline is a spiral corrugated protective sleeve 1011 covering the rope-driven universal joint, and the inner pipeline is an independent through-type nasogastric tube delivery channel 1012. The nasogastric tube delivery channel 1012 independently constrains the trajectory of the nasogastric tube, limiting radial displacement of the catheter during insertion. The outer and inner pipes are enclosed to form a closed annular wiring cavity 1013, and a traction steel wire rope 1014 and a camera signal line 1015 are arranged inside the annular wiring cavity 1013. The circumferential sealing structure 201 includes an annular silicone sealing ring 2011 and an annular groove block 2012. The annular silicone sealing ring 2011 is assembled at the tail of the camera guide end 20, and the annular groove block 2012 is formed at the front end of the spiral corrugated protective sleeve 1011. The annular silicone sealing ring 2011 is squeezed and filled in the assembly gap after clamping, blocking the penetration of nasopharyngeal fluid and mucus into the annular wiring cavity 1013. The control host 30 is provided with a grip handle 301, and a channel inlet 302 is opened at the center of the tail of the control host 30. The nasogastric tube passes through the channel inlet 302 into the nasogastric tube delivery channel 1012, and extends through the double-layer coaxial pipeline to the guide port of the camera guide end 20. A visual display 303 is installed at the top of the rear of the control host 30. Example 2: Based on Example 1, as follows Figure 3-7 As shown, the nasogastric tube delivery channel 1012 is made of highly elastic medical soft tubing, with an outer spiral corrugated protective sleeve 1011 reserved for axial expansion and contraction. The traction steel wire rope 1014 and the camera signal line 1015 are arranged in a ring-shaped cable cavity 1013, completely isolated from the delivery channel. Nutrient solution and nasopharyngeal secretions will not corrode the steel cable and the line, eliminating the risk of steel wire rope corrosion and breakage, and short circuit of the camera line. At the same time, the outer spiral corrugated protective sleeve 1011 is reserved for expansion and contraction. When bending, the corrugation expansion and contraction compensate for the length difference. The inner nasogastric tube delivery channel 1012 adapts to bending, and the inner diameter of the tube remains constant at any bending angle. The nasogastric tube is pushed without jamming, realizing integrated exploration and tube delivery operation without the need to change instruments.

[0022] The camera guide end 20 has an independent miniature wiring transition cavity 202 inside, where the camera signal line 1015 end and the front end of the traction steel wire rope 1014 are all housed and arranged. By setting up an independent micro-wiring transition cavity 202, the end of the camera signal line 1015 and the front end of the traction steel wire rope 1014 are all housed in the micro-wiring transition cavity 202. When the camera guide end 20 is disassembled, the micro-wiring transition cavity 202 is simultaneously isolated from the annular wiring cavity 1013, and the contaminated body fluid is only retained inside the camera guide end 20. Therefore, the camera guide end 20 can be used as a disposable sterile consumable. The control host 30 and the spiral corrugated protective sleeve 1011 can be repeatedly disinfected and reused, reducing the department's consumable expenses. The high-definition camera probe 203 is embedded in the front end face of the camera guide end 20 with the lens facing outward and in the same direction as the nasogastric tube. It can directly view the nasopharyngeal cavity channel and collect tube placement images in real time and transmit them to the visual display 303.

[0023] The camera guide end 20 is a disposable sterile consumable, while the control host 30 and the spiral corrugated protective sleeve 1011 can be repeatedly disinfected and reused.

[0024] The front end face of the camera guide end 20 is fitted with a high-definition camera probe 203. The lens of the high-definition camera probe 203 faces outward and is in the same direction as the nasogastric tube. It can directly view the nasopharyngeal cavity passage in front and collect images of the tube insertion path in real time, which are then transmitted to the visual display 303 through the camera signal line 1015.

[0025] The traction wire rope 1014 and the camera signal line 1015 are arranged in sections within the annular cable cavity 1013, completely isolated from the nasogastric tube delivery channel 1012. This prevents the nutrient solution and nasopharyngeal secretions from coming into contact with the traction wire rope 1014 and the camera signal line 1015, and prevents the traction wire rope 1014 from rusting and breaking, and the camera signal line 1015 from short-circuiting.

[0026] The inner wall of each corrugated section of the spiral corrugated protective sleeve 1011 is integrally formed with an axial limiting rib 1016. The axial limiting rib 1016 abuts against the outer periphery of the internal series universal joint to form an axial anti-disengagement limit, preventing the universal joint from being stretched and disengaged when it bends. The axial limiting rib 1016 can also separate each group of traction steel wire ropes 1014 to prevent the traction steel wire ropes 1014 from having large-area frictional contact with the inner wall of the spiral corrugated protective sleeve 1011. The axial limiting ribs 1016 are integrally formed on the inner wall of each corrugated section of the spiral corrugated protective sleeve 1011. The axial limiting ribs 1016 abut against the outer periphery of the internal series universal joint, forming an axial anti-disengagement limiting structure. When the rope-driven flexible adjustment section 10 is bent significantly, the universal joint will not be axially stretched and disengaged, ensuring the overall structural connection stability. At the same time, the axial limiting ribs 1016 separate each group of traction steel wire ropes 1014 from each other, avoiding large-area friction contact between the traction steel wire ropes 1014 and the inner wall of the spiral corrugated protective sleeve 1011 when the traction steel wire ropes 1014 are pulled back and forth, reducing the wear and tear of the steel wire ropes and improving the durability of the device after repeated bending.

[0027] The working principle of this invention is as follows: The rope-driven adjustable angle nasogastric tube guide device is composed of a rope-driven flexible adjustment section 10, a camera guide end 20, and a control host 30. In the overall assembly state, the camera guide end 20 is coaxially mounted to the front end of the guide device body 101 of the rope-driven flexible adjustment section 10. The two are axially sealed and connected through a circumferential sealing fit structure 201. The circumferential sealing fit structure 201 is formed by an annular silicone sealing ring 2011 mounted at the tail of the camera guide end 20 and an annular groove block 2012 opened at the front end of the spiral corrugated protective sleeve 1011. In the assembled clamping state, the annular silicone sealing ring 2011 is squeezed and fills the entire assembly gap, which can effectively block nasopharyngeal fluid and mucus from seeping into the internal annular wiring cavity 1013, and achieve sealing protection of the internal transmission and wiring structure. The main body 101 of the guiding device adopts a double-layer coaxial hollow pipeline structure design. The outer layer is a spiral corrugated protective sleeve 1011 covering the rope-driven universal joint, and the inner layer is an independent through-type nasogastric tube delivery channel 1012. The outer and inner pipelines enclose each other to form a closed annular wiring cavity 1013. The traction steel wire rope 1014 and the camera signal line 1015 are arranged in sections and stored inside the annular wiring cavity 1013, completely isolated from the inner nasogastric tube delivery channel 1012. This can effectively prevent the nutrient solution and nasopharyngeal secretions from directly contacting the traction steel wire rope 1014 and the camera signal line 1015, and eliminate the problems of rust and breakage of the traction steel wire rope 1014 and short circuit damage of the camera signal line 1015, greatly improving the stability and service life of the device. In clinical use, medical staff hold the handle 301 of the control host 30 and insert the nasogastric tube through the channel entrance 302 at the center of the tail of the control host 30. The nasogastric tube is coaxially transported along the inner nasogastric tube delivery channel 1012 and finally extends out from the guide port of the camera guide end 20. Relying on the tubular constraint of the nasogastric tube delivery channel 1012, the radial deviation and swing generated during the insertion of the nasogastric tube can be effectively limited, and the catheter can be prevented from scratching and damaging the patient's nasopharyngeal mucosa. The inner nasogastric tube delivery channel 1012 is made of highly elastic medical soft tubing. Combined with the axial expansion and contraction allowance reserved in the outer spiral corrugated protective sleeve 1011, when the traction steel wire rope 1014 pulls and causes the rope-driven flexible adjustment section 10 to undergo multi-angle bending deformation, the outer spiral corrugated protective sleeve 1011 can compensate for the length difference caused by bending in real time through its own corrugated expansion and contraction structure. The inner nasogastric tube delivery channel 1012 synchronously and adaptively bends flexibly, keeping the inner diameter of the tube constant throughout the process. There will be no problems such as bending and diameter reduction, or tube blockage and jamming. This ensures that the nasogastric tube is pushed smoothly and stably, realizing the integrated operation of visual path exploration and nasogastric tube delivery without the need to change instruments. The high-definition camera probe 203, which is embedded in the front end face of the camera guide end 20, faces outward and is in the same direction as the nasogastric tube. It can directly view the nasopharyngeal cavity passage in front of the patient, collect images of the tube insertion path in real time, and transmit the image data to the visual display 303 at the top of the rear of the control host 30 in real time through the camera signal line 1015, so as to achieve full-process visual and accurate tube insertion and avoid the risk of blind insertion. Meanwhile, an independent micro-wiring transition cavity 202 is set inside the camera guide end 20. The end of the camera signal line 1015 and the front end of the traction steel wire rope 1014 are centrally stored inside the micro-wiring transition cavity 202. After the tube is placed, the camera guide end 20 can be directly disassembled and removed. At this time, the micro-wiring transition cavity 202 is completely isolated from the annular wiring cavity 1013 along with the camera guide end 20. Contaminated body fluids and dirt are only stored inside the disposable camera guide end 20. The control host 30 and the spiral corrugated protective sleeve 1011 can be reused after disinfection, effectively reducing the cost of clinical consumables. Meanwhile, each section of the spiral corrugated protective sleeve 1011 has an integrally formed axial limiting rib 1016 on its inner wall. The axial limiting rib 1016 closely abuts against the outer periphery of the internal series universal joints, forming a stable axial anti-disengagement limit for multiple sets of universal joints. This effectively avoids the problem of axial stretching and disengagement of the universal joints and structural loosening and failure during repeated bending and deformation of the rope-driven flexible adjustment section 10. In addition, the axial limiting rib 1016 can separate and limit each set of traction steel wire ropes 1014, avoiding large-area friction contact between the traction steel wire ropes 1014 and the inner wall of the spiral corrugated protective sleeve 1011 during the reciprocating traction deformation process. This significantly reduces the wear and tear of the traction steel wire ropes 1014 and improves the overall structural stability and durability of the device during repeated bending and use.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rope-driven, adjustable-angle nasogastric tube guiding device, comprising a rope-driven flexible adjustment section (10), a camera guide end (20), and a control host (30), characterized in that: The rope-driven flexible adjustment section (10) includes a guide device body (101), and a circumferential sealing fit structure (201) is provided between the front end of the guide device body (101) and the camera guide end (20). The main body (101) of the guiding device is provided with an inner and outer double-layer coaxial hollow pipeline. The outer pipeline is a spiral corrugated protective sleeve (1011) covering the rope-driven universal joint, and the inner pipeline is an independent through-type nasogastric tube delivery channel (1012). The nasogastric tube delivery channel (1012) independently constrains the trajectory of the nasogastric tube, limiting radial deviation of the catheter during insertion. The outer and inner pipelines enclose each other to form a closed annular wiring cavity (1013), and a traction steel wire rope (1014) and a camera signal line (1015) are arranged inside the annular wiring cavity (1013). The circumferential sealing structure (201) includes an annular silicone sealing ring (2011) and an annular groove block (2012). The annular silicone sealing ring (2011) is assembled at the tail of the camera guide end (20), and the annular groove block (2012) is opened at the front end of the spiral corrugated protective sleeve (1011). The annular silicone sealing ring (2011) is squeezed and filled in the assembly gap after clamping, blocking the penetration of nasopharyngeal fluid and mucus into the annular wiring cavity (1013); The control host (30) is provided with a handle (301), and a channel entrance (302) is opened at the center of the tail of the control host (30). The nasogastric tube passes through the channel entrance (302) into the nasogastric tube delivery channel (1012), and extends through the double-layer coaxial pipeline to the guide port of the camera guide end (20). The control host (30) is equipped with a visual display (303) at the top of its rear end.

2. The rope-driven adjustable-angle nasogastric tube guide device according to claim 1, characterized in that: The nasogastric tube delivery channel (1012) is made of highly elastic medical soft tubing, and the outer spiral corrugated protective sleeve (1011) is reserved for axial expansion and contraction deformation.

3. The rope-driven adjustable-angle nasogastric tube guide device according to claim 1, characterized in that: The camera guide end (20) is provided with an independent micro-wiring transition cavity (202), in which the camera signal line (1015) end and the front end of the traction steel wire rope (1014) are all housed and arranged.

4. The rope-driven adjustable-angle nasogastric tube guide device according to claim 1, characterized in that: The camera guide end (20) is a disposable sterile consumable, while the control host (30) and the spiral corrugated protective sleeve (1011) can be repeatedly disinfected and reused.

5. A rope-driven adjustable-angle nasogastric tube guide device according to claim 1, characterized in that: The front end face of the camera guide end (20) is fitted with a high-definition camera probe (203). The lens of the high-definition camera probe (203) faces outward and is in the same direction as the nasogastric tube. It can directly view the nasopharyngeal cavity channel in front, collect images of the tube insertion path in real time, and transmit them to the visual display (303) through the camera signal line (1015).

6. The rope-driven adjustable-angle nasogastric tube guide device according to claim 1, characterized in that: The traction wire rope (1014) and camera signal line (1015) are arranged in a ring-shaped cable cavity (1013) and are completely isolated from the nasogastric tube delivery channel (1012) to prevent nutrient solution and nasopharyngeal secretions from contacting the traction wire rope (1014) and camera signal line (1015).

7. A rope-driven adjustable-angle nasogastric tube guide device according to claim 1, characterized in that: The inner wall of each corrugated section of the spiral corrugated protective sleeve (1011) is integrally formed with an axial limiting rib (1016). The axial limiting rib (1016) can also separate each group of traction steel wire ropes (1014) to prevent the traction steel wire ropes (1014) from having large-area frictional contact with the inner wall of the spiral corrugated protective sleeve (1011).

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