CN117618252A - Visual curved nasal feeding nutrition catheter of accuse - Google Patents

Abstract

The invention discloses a visual bending-controlled nasal feeding nutrition catheter which comprises a catheter body, wherein one end of the catheter body, which enters a human body, is a far end, a bending-controlled device is arranged on the catheter body, a snake-bone-shaped soft section is communicated with the far end of the catheter body, the catheter body and the soft section are of an integrated structure made of the same or different materials, the far end of the soft section is provided with a camera device, and the bending-controlled device is connected with the far end of the soft section through at least one stay wire. The invention has the advantages of avoiding integral bending, reducing the difficulty of tube placement and reducing injuries.

Description

Visual curved nasal feeding nutrition catheter of accuse

Technical Field

The invention relates to the field of medical instruments, in particular to a visual bending-control nasal feeding nutrition catheter.

Background

When medical staff keep somewhere nasal feeding nutrition catheter to the patient, because of the inherent physiological structure of human etc. reasons, medical staff is difficult to seek and judge esophagus and pylorus's position, when unable accurate esophagus of inserting, easily mistake entering the air flue, causes patient's dyspnea, tricks etc. problem, even appear life danger when serious. Especially, the diameter of the pylorus is about 1.5cm, which is the narrowest part of the alimentary canal, when the catheter is placed, medical staff often need to repeatedly draw the catheter for a plurality of times to try to lead the nasal feeding nutrition catheter to pass through the pylorus, a great deal of time is consumed, and meanwhile, the mucous membrane of a patient is inevitably damaged in the drawing and pulling process. And, after the nasal feeding nutrition catheter is placed in the human body, the position of the insertion of the catheter is judged by shooting X-rays for a plurality of times, so that the damage is caused to the patient.

In order to solve the above problems, chinese patent publication No. CN216629191U discloses a head-controllable-bending visual nasogastric tube, in which a gastrointestinal decompression cavity is provided on a nasogastric tube body, a camera can extend to a visualization cavity located at a distal end of the gastrointestinal decompression cavity through the gastrointestinal decompression cavity to obtain a picture outside the head of the nasogastric tube body, and a control wire is pulled by a wire pulling mechanism to enable the head of the nasogastric tube body to bend, so that the condition inside the alimentary canal can be observed in the process of retaining the nasogastric nutrition catheter, and simultaneously, the advancing direction of the nasogastric nutrition catheter is guided and controlled, so that the nasogastric nutrition catheter can be accurately inserted into the esophagus and rapidly pass through the pylorus, and meanwhile, the injury to a patient is reduced. However, the nasal feeding nutrition catheter is generally soft, the tube body is bent under a small force, when the stay wire for controlling bending is pulled, the whole nasal feeding nutrition catheter is bent integrally due to the friction force generated between the stay wire and the tube body, and not only the head end of the nasal feeding nutrition catheter placed into one end of a human body is partially bent, so that effective bending control cannot be realized only by the stay wire, the camera is affected to obtain an effective visual field, and the difficulty of judging the position of the nasal feeding nutrition catheter in the human body is improved.

How to solve the problems is a technical problem to be solved.

Disclosure of Invention

The invention aims to provide a visual bend-controlling nasal feeding nutrition catheter which can avoid integral bending, reduce the difficulty of tube placement and reduce injuries.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the invention provides a visual bending-controlled nasal feeding nutrition catheter which comprises a catheter body, wherein one end of the catheter body, which enters a human body, is a far end, a bending-controlled device is arranged on the catheter body, a snake-bone-shaped soft section is communicated with the far end of the catheter body, the catheter body and the soft section are of an integrated structure made of the same or different materials, the hardness of the soft section is lower than that of the catheter body, a camera device is arranged at the far end of the soft section, and the bending-controlled device is connected with the far end of the soft section through at least one stay wire.

Further, a plurality of dislocation holes are formed in the soft section, the depth of each dislocation hole is 1/3-2/3 of the diameter of the soft section, and the dislocation holes are arranged in at least two rows in a dislocation mode along the length direction of the soft section to form a snake bone-shaped structure.

Further, the tube body is provided with a plurality of stay wire cavities which are equal to the stay wires in number, the stay wire cavities are arranged along the length direction of the tube body, the distal ends of the stay wire cavities extend to the distal ends of the soft sections, the proximal ends of the stay wire cavities are communicated with the bending control device, the stay wire cavities are internally sleeved with a stay wire sheath with smooth inner walls, and the stay wire sliding sleeves are arranged on the inner sides of the stay wire sheaths.

Further, the bending control device comprises a handle with two through ends, a rotating wheel is rotatably arranged on the handle, the far end of the handle is communicated with the pipe body, a negative pressure joint is arranged at the near end of the handle, the far end of the fixed end head and the sleeve head connecting part are detachably connected with the near end of the negative pressure joint, the near end of the stay wire is connected with the rotating wheel, and the near end of the pipe body is communicated with the outside through the handle and the negative pressure joint in sequence.

Further, the camera device comprises a camera, the camera is arranged at the far end of the soft section and is connected with a camera signal wire, the camera signal wire is arranged along the length direction of the tube body, and the near end of the camera signal wire penetrates out of the tube body to be connected with external display equipment.

Further, a transparent protective cover for covering the camera is arranged at the distal end of the soft section.

Further, still be provided with nutrition chamber, signal line transmission chamber on the body, nutrition chamber, signal line transmission chamber all extend along the length direction of body and nutrition chamber, the distal end of signal line transmission chamber all extend to the distal end of soft section, wherein, the distal end in nutrition chamber is through each dislocation hole and external intercommunication and the near-end in this nutrition chamber with handle, negative pressure joint intercommunication in proper order, the near-end in signal line transmission chamber is through a camera line export and external intercommunication, the distal end of camera signal line stretches into in the soft section through camera line export, signal line transmission chamber in proper order and is connected with the camera.

Further, the device also comprises a guide wire, wherein the guide wire is sleeved on the inner side of the pipe body in a sliding manner, the proximal end of the guide wire sequentially penetrates through the pipe body, the handle and the negative pressure connector to be connected with a guide wire connector, and the guide wire connector is detachably connected with the negative pressure connector.

Further, the guide wire connector comprises a fixed end head and a positioning sleeve head, wherein the fixed end head is fixedly connected with the guide wire, the positioning sleeve head is detachably sleeved on the outer side of the guide wire, the proximal end of the positioning sleeve head is detachably connected with the distal end of the fixed end head, and the distal ends of the fixed end head and the positioning sleeve head are detachably connected and matched with the proximal end of the negative pressure connector.

Further, the location pullover includes the barrel, barrel slip cap establishes in the outside of seal wire and the distal end of this barrel can dismantle with the distal end of fixed end and be connected, and the distal end of barrel is provided with pullover connecting portion, pullover connecting portion can dismantle with the proximal end of negative pressure connector and be connected, and, set up on the location pullover and extend and both ends link up the breach along its length direction.

Due to the adoption of the structure, the invention has the following beneficial effects:

according to the invention, the imaging device and the bending control device are arranged on the tube body, the visual field in the alimentary canal can be acquired through the imaging device in the tube placement process, the advancing direction of the tube body is adjusted through the bending control device and the stay wire, and the snake-bone-shaped soft section is arranged at the far end of the tube body in a communicated manner, so that the soft section has good bending performance, the tube body can be effectively prevented from being integrally bent when being bent by the bending control device and the stay wire, the bending control and the visual field acquisition are convenient, the tube placement difficulty is reduced, the nasal feeding nutrition tube can smoothly enter the esophagus and pass through the pylorus position, the mistaken entering of the airway is avoided, the insertion position of the tube is accurately judged, and the tube placement time and the injury of a patient are reduced.

The invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the positioning sleeve head and the bending control device of the present invention when connected;

FIG. 2 is a schematic view of the whole structure of the fixing end of the present invention when connected with the bending control device;

FIG. 3 is a schematic view of the overall structure of the guide wire connector of the present invention;

FIG. 4 is a cross-sectional view of a tube body of the present invention;

fig. 5 is a partial enlarged view of the portion a of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 5, the nasal feeding nutrition catheter with visual bend control provided by the invention comprises a catheter body 1, wherein one end of the catheter body 1 entering a human body is a distal end, a bend control device 3 is arranged on the catheter body 1, a snake-bone-shaped soft section 11 is communicated with the distal end of the catheter body 1, the catheter body 1 and the soft section 11 are of an integrated structure made of the same or different materials, the distal end of the soft section 11 is provided with a camera device 2, and the bend control device 3 is connected with the distal end of the soft section 11 through at least one stay wire 7. The soft section 11 adopts a snake bone-shaped structure, has good bending resistance, can effectively avoid the integral bending of the tube body 1 during bending control, is convenient for bending control and visual field acquisition, and reduces the difficulty of tube placement; in the tube placement process, the position of the distal end of the tube body 1 and the front visual field are observed through the image pickup device 2, and the advancing direction of the soft segment 11 is adjusted through the bending control device 3 and the stay wire 7, so that the distal ends of the tube body 1 and the soft segment 11 can smoothly enter the esophagus and pass through the pylorus position, the error entering the airway is avoided, the inserted position of the soft segment 11 is accurately judged, and the tube placement time and the damage of a patient are reduced.

In the invention, the soft segment 11 is provided with a plurality of dislocation holes 111, the depth of the dislocation holes 111 is 1/3-2/3 of the diameter of the soft segment 11, and the dislocation holes 111 are arranged in at least two rows along the length direction of the soft segment 11 to form a snake bone-shaped structure, thereby effectively improving the bending performance of the soft segment 11 and having better bending control effect. The dislocation hole 111 is communicated with the tube body 1 through the soft section 11 and can be used as an outlet of nutrient solution.

In the invention, the tube body 1 is provided with the stay wire cavities 103 the number of which is equal to that of the stay wires 7, the stay wire cavities 103 are arranged along the length direction of the tube body 1, the distal ends of the stay wire cavities 103 extend to the distal ends of the soft sections 11, the proximal ends of the stay wire cavities 103 are communicated with the bending control device 3, a stay wire sheath 1031 with a smooth inner wall is sleeved in the stay wire cavities 103, and the stay wires 7 are sleeved on the inner side of the stay wire sheath 1031 in a sliding manner. The wire sheath 1031 may be made of PTFE, a spring, or other soft and low-resistance materials, or may have a friction coefficient reduced by adding a lubricant coating to the inner wall thereof, so that the friction coefficient between the wire sheath 1031 and the wire 7 is less than 0.2, and the resistance in the movement process of the wire 7 is effectively reduced.

In the invention, the bending control device 3 comprises a handle 31 with two through ends, a rotating wheel 33 is rotatably arranged on the handle 31, the far end of the handle 31 is communicated with the pipe body 1, the near end of the handle 31 is communicated with a negative pressure joint 32, the far end of the fixed end head 51 and the sleeve joint 522 are detachably connected with the near end of the negative pressure joint 32, the near end of the stay wire 7 is connected with the rotating wheel 33, and the rotating wheel 33 is rotated, so that the stay wire 31 can be driven to move, and the pipe body 1 is pulled to bend, thereby realizing the bending control effect; the proximal end of the tube body 1 is communicated with the outside through a handle 31 and a negative pressure joint 32 in sequence. In use, the negative pressure connector 32 is connected to an external negative pressure system as necessary, and the pressure in the stomach can be reduced.

In the invention, the camera device 2 comprises a camera 21, the camera 21 is arranged at the far end of the soft segment 11, the camera 21 is connected with a camera signal wire 22, the camera signal wire 22 is arranged along the length direction of the tube body 1, and the near end of the camera signal wire 22 penetrates out of the tube body 1 and is connected with external display equipment, so that the condition of the internal cavity of a human body can be observed in real time, the camera 21 can block the guide wire 4, and the far end of the guide wire 4 extends out of the soft segment 11 to damage human tissues.

In the invention, the transparent protective cover 6 for sleeving the camera 21 is arranged at the distal end of the soft segment 11, and the protective cover 6 is of an outwards convex structure, so that the view angle of the camera 21 is effectively increased, the view angle of the camera 21 is more than 120 degrees, a wider view can be provided to assist medical staff in judging the view of the distal end of the soft segment 11, accurately judging the position of the distal end of the soft segment 11, and preventing the lens of the camera 21 from scratching tissues; the side of the protective cover 6 close to the camera 21 is a plane, so that the lens of the camera 21 can be attached to the protective cover 6. The protective cover 6 is made of PC, K material, AB or other high-permeability materials.

In the invention, the tube body 1 is further provided with a nutrition cavity 101 and a signal wire transmission cavity 102, the nutrition cavity 101 and the signal wire transmission cavity 102 extend along the length direction of the tube body 1, and the distal ends of the nutrition cavity 101 and the signal wire transmission cavity 102 extend to the distal end of the soft segment 11, wherein the distal end of the nutrition cavity 101 is communicated with the outside through each dislocation hole 111, the proximal end of the nutrition cavity 101 is sequentially communicated with the handle 31 and the negative pressure joint 32, the proximal end of the signal wire transmission cavity 102 is communicated with the outside through a camera wire outlet 104, and the distal end of the camera wire 22 sequentially extends into the soft segment 11 through the camera wire outlet 104 and the signal wire transmission cavity 102 to be connected with the camera 21, so that the internal condition of a human body can be observed in real time. And, a gastrointestinal decompression cavity and a pressure balance cavity can be arranged in the tube body 1, or the pull wire cavity 103 and the signal wire transmission cavity 102 can be used together as the gastrointestinal decompression cavity and the pressure balance cavity.

In the invention, the length of the guide wire 4 is equal to the sum of the lengths of the pipe body 1, the bending control device 3 and the barrel 521, and the length of the guide wire 4 is smaller than the sum of the lengths of the pipe body 1, the bending control device 3 and the barrel 521, so that when the positioning sleeve head 52 is sleeved outside the guide wire 4, the distal end of the guide wire 4 is positioned in the pipe body 1, the hardness difference between the nasal feeding nutrition catheter and the corresponding parts of the pipe body 1 and the soft section 11 can be effectively increased, and when the positioning sleeve head 52 is detached from the guide wire 4, the distal end of the guide wire 4 stretches into the soft section 11 when the fixed end head 51 is connected with the bending control device 3, and the hardness of the soft section 11 can be effectively enhanced.

The invention further comprises a guide wire 4, wherein the guide wire 4 is sleeved on the inner side of the pipe body 1 in a sliding manner, the proximal end of the guide wire 4 sequentially penetrates through the pipe body 1, the handle 31 and the negative pressure connector 32 to be connected with a guide wire connector 5, and the guide wire connector 5 is detachably connected with the negative pressure connector 32. In the tube placement process, the advancing direction of the soft segment 11 is adjusted through the rotating wheel 33 while the position where the far end of the tube body 1 is located and the front visual field are observed through the camera device 2, meanwhile, the guide wire 4 is matched to extend into the tube body 1, the extending length of the guide wire 4 is adjusted, the hardness difference between the nasal feeding nutrition catheter and the corresponding parts of the tube body 1 and the soft segment 11 can be adjusted according to the needs, the nasal feeding nutrition catheter is further prevented from being integrally bent during bending control, the bending control and the visual field acquisition are convenient, the tube placement difficulty is reduced, the far end of the tube body 1 and the soft segment 11 can smoothly enter the esophagus and pass through the pylorus position, the error entering of the air passage is avoided, the position where the soft segment 11 is inserted is accurately judged, and the tube placement time and the damage of a patient are reduced.

In the invention, the guide wire connector 5 comprises a fixed end head 51 and a positioning sleeve head 52, wherein the fixed end head 51 is fixedly connected with the guide wire 4, the positioning sleeve head 52 is detachably sleeved on the outer side of the guide wire 4, the proximal end of the positioning sleeve head 52 is detachably connected with the distal end of the fixed end head 51, and the distal ends of the fixed end head 51 and the positioning sleeve head 52 are detachably connected and matched with the proximal end of the negative pressure connector 32. The proximal end of the positioning sleeve 52 is connected with the distal end of the fixed end 51, the distal end of the fixed end 51 is connected with the proximal end of the negative pressure connector 32, and the distal end of the positioning sleeve 52 is connected with the proximal end of the negative pressure connector 32 in the same detachable connection mode, which can be a clamping connection mode, a threaded connection mode, a luer connection mode or other detachable connection modes. When in use, the distal end of the guide wire 4 sequentially extends into the soft section 11 through the negative pressure joint 32, the handle 31 and the pipe body 1 until the fixed end 51 can be connected with the proximal end of the negative pressure joint 32, and at the moment, the distal end of the guide wire 4 is positioned in the distal end of the soft section 11, so that the overall hardness of the pipe body 1 can be increased, and the pipe is convenient to put; when the fixed end 51 is separated from the negative pressure joint 32 and the proximal end of the guide wire 4 is exposed to the outside by pulling back, the positioning sleeve head 52 is sleeved on the guide wire 4, and the two ends of the positioning sleeve head 52 are respectively connected with the negative pressure joint 32 and the positioning sleeve head 52, so that the guide wire 4 can only increase the hardness of the tube body 1, and the hardness difference between the parts of the nasal feeding nutrition catheter corresponding to the tube body 1 and the soft section 11 is increased, thereby better realizing the bending control effect.

In the present invention, the positioning sleeve 52 includes a cylinder 521, the cylinder 521 is slidably sleeved on the outside of the guide wire 4, the proximal end of the cylinder 521 is detachably connected with the distal end of the fixed end 51, the distal end of the cylinder 521 is provided with a sleeve connection part 522, the sleeve connection part 522 is detachably connected with the proximal end of the negative pressure connector 32, and the positioning sleeve 52 is provided with a notch 523 extending along the length direction and having two ends penetrating, so that the cross section of the positioning sleeve 52 is in a non-closed circle, and the positioning sleeve 52 can be radially separated from the guide wire 4. The proximal end of the barrel 521 is connected to the distal end of the fixed head 51, the sleeve connection 522 and the negative pressure connector 32 by the same detachable connection method, which may be a clamping connection, a threaded connection, a luer connection, or other detachable connection methods.

When the invention is used, the guide wire 4 stretches into the pipe body 1, the fixed end 51 is connected with the proximal end of the negative pressure joint 32, the front view of the soft section 11 is obtained through the camera 21, meanwhile, the soft section 11 is driven to bend through the stay wire 31 by rotating the rotating wheel 33 according to the requirement so as to adjust the advancing direction of the soft section 11, and the distal end of the soft section 11 is controlled to be placed into a human body; when the distal end of the soft segment 11 reaches the junction between the esophagus and the glottis or reaches the stomach after passing through the cardia, according to the requirement, after the fixed end head 51 is separated from the negative pressure joint 32 and the proximal end of the guide wire 4 is pulled back to expose the outside, the positioning sleeve head 52 is radially sleeved outside the proximal end of the guide wire 4 through the notch 523 of the positioning sleeve head 52, the proximal end of the barrel 521 is connected with the distal end of the fixed end head 51, the sleeve head connecting part 522 is connected with the proximal end of the negative pressure joint 32, at the moment, the distal end of the guide wire 4 is positioned in the tube body 1, the difference of the hardness between the nasal feeding nutrition catheter and the corresponding parts of the tube body 1 and the soft segment 11 is large, the soft segment 11 can be controlled to locally bend, and the bending control effect is better to enable the distal end of the tube body 1 to smoothly enter the esophagus and pass through the pylorus; when the tube body 1 enters the esophagus or passes through the pylorus, the positioning sleeve head 52 is detached from the guide wire 4 and the fixed end head 51 is connected with the negative pressure joint 32 again, at the moment, the proximal end of the guide wire 4 stretches into the soft section 11 and props against the camera 21, the guide wire 4 plays a supporting role on the soft section 11 and reduces the hardness difference between the nasal feeding nutrition catheter and the corresponding parts of the tube body 1 and the soft section 11 respectively, the whole operation is more convenient, and the tube placing speed can be effectively improved.

The preferred embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, wherein devices and structures not described in detail are to be understood as being implemented in a manner common in the art; any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modifications to equivalent embodiments without departing from the scope of the technical solution of the present invention, using the methods and technical contents disclosed above, without affecting the essential content of the present invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (10)

1. The nasal feeding nutrition catheter with visual bending control comprises a catheter body (1), wherein one end of the catheter body (1) entering a human body is a far end, and a bending control device (3) is arranged on the catheter body (1); the method is characterized in that: the flexible pipe comprises a pipe body (1), and is characterized in that a snake-bone-shaped soft section (11) is arranged at the far end of the pipe body (1) in a communicating mode, the pipe body (1) and the soft section (11) are of an integrated structure made of the same or different materials, an image pickup device (2) is arranged at the far end of the soft section (11), and the bending control device (3) is connected with the far end of the soft section (11) through at least one stay wire (7).

2. A visual bend-controlling nasal feeding nutrition catheter according to claim 1, wherein: the soft section (11) is provided with a plurality of dislocation holes (111), the depth of each dislocation hole (111) is 1/3-2/3 of the diameter of the soft section (11), and each dislocation hole (111) is arranged in at least two rows in a dislocation way along the length direction of the soft section (11) to form a snake bone-shaped structure.

3. A visual bend-controlling nasal feeding nutrition catheter according to claim 1, wherein: be provided with on body (1) the quantity with act as go-between the wire cavity (103) that the quantity of (7) equals, act as go-between the length direction setting of body (1) and this distal end of acting as go-between cavity (103) extends to the distal end of soft section (11), and the near-end and the accuse bending device (3) intercommunication of cavity (103) of acting as go-between, act as go-between cavity (103) endotheca is equipped with smooth wire sheath (1031) of inner wall, act as go-between (7) slip cap and locate the inboard of wire sheath (1031).

4. A visual bend-controlling nasal feeding nutrition catheter according to claim 3, wherein: the bending control device (3) comprises a handle (31) with two ends communicated, a rotating wheel (33) is rotatably arranged on the handle (31), the far end of the handle (31) is communicated with the pipe body (1), a negative pressure joint (32) is arranged at the near end of the handle (31), the near end of the stay wire (7) is connected with the rotating wheel (33), and the near end of the pipe body (1) is communicated with the outside through the handle (31) and the negative pressure joint (32) in sequence.

5. A visually controlled bend nasal feeding nutrition catheter as defined in claim 4, wherein: the camera device (2) comprises a camera (21), the camera (21) is arranged at the far end of the soft section (11) and is connected with a camera signal wire (22), the camera signal wire (22) is arranged along the length direction of the pipe body (1), and the near end of the camera signal wire (22) penetrates out of the pipe body (1) and is connected with external display equipment.

6. A visual bend-controlling nasal feeding nutrition catheter as claimed in claim 5, wherein: the distal end of the soft segment (11) is provided with a transparent protective cover (6) for covering the camera (21).

7. A visually controlled bend nasal feeding nutrition catheter according to claim 4 or 5 or 6, wherein: still be provided with nutrition chamber (101), signal line transmission chamber (102) on body (1), nutrition chamber (101), signal line transmission chamber (102) all extend along the length direction of body (1) and nutrition chamber (101), the distal end of signal line transmission chamber (102) all extends to the distal end of soft section (11), wherein, the distal end of nutrition chamber (101) is through each dislocation hole (111) and the near-end of this nutrition chamber (101) communicates with handle (31), negative pressure joint (32) in proper order, the near-end of signal line transmission chamber (102) communicates with the external world through a camera line export (104), the distal end of camera signal line (22) stretches into in soft section (11) through camera line export (104), signal line transmission chamber (102) in proper order and is connected with camera (21).

8. A visually controlled bend nasal feeding nutrition catheter according to claim 4 or 5 or 6, wherein: the novel catheter also comprises a guide wire (4), wherein the guide wire (4) is sleeved on the inner side of the catheter body (1) in a sliding manner, the proximal end of the guide wire (4) sequentially penetrates through the catheter body (1), the handle (31) and the negative pressure connector (32) to be connected with a guide wire connector (5), and the guide wire connector (5) is detachably connected with the negative pressure connector (32).

9. A visually controlled bend nasal feeding nutrition catheter according to claim 8, wherein: the guide wire connector (5) comprises a fixed end head (51) and a positioning sleeve head (52), wherein the fixed end head (51) is fixedly connected with the guide wire (4), the positioning sleeve head (52) is detachably sleeved on the outer side of the guide wire (4), the proximal end of the positioning sleeve head (52) is detachably connected with the distal end of the fixed end head (51), and the distal ends of the fixed end head (51) and the positioning sleeve head (52) are detachably connected and matched with the proximal end of the negative pressure connector (32).

10. A visual bend-controlling nasal feeding nutrition catheter according to claim 9, wherein: the positioning sleeve head (52) comprises a barrel body (521), the barrel body (521) is slidably sleeved on the outer side of the guide wire (4), the proximal end of the barrel body (521) is detachably connected with the distal end of the fixed end head (51), a sleeve head connecting portion (522) is arranged at the distal end of the barrel body (521), the sleeve head connecting portion (522) is detachably connected with the proximal end of the negative pressure connector (32), and a notch (523) extending along the length direction of the positioning sleeve head (52) and penetrating through the two ends of the positioning sleeve head is formed in the positioning sleeve head.