CN114795968A

CN114795968A - Method and device for conducting pressure at head end of medical nasal feeding catheter in controllable steering manner

Info

Publication number: CN114795968A
Application number: CN202210625577.6A
Authority: CN
Inventors: 韩加凤
Original assignee: Lianyungang Aoke Medical Instrument Co ltd
Current assignee: Lianyungang Aoke Medical Instrument Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-07-29
Anticipated expiration: 2042-06-02
Also published as: CN114795968B

Abstract

The invention discloses a method and a device for conducting pressure at the head end of a medical nasal feeding catheter to control steering, relates to the technical field of nasal feeding catheter control devices, solves the problem that the catheter is difficult to insert due to different synchronization of catheter pushing and catheter bending, and comprises a connecting component communicated with the catheter; the pushing assembly is used for pushing and matching the guide pipe when the matching connection assembly runs and is arranged on the guide pipe.

Description

Method and device for conducting pressure at head end of medical nasal feeding catheter in controllable steering manner

Technical Field

The invention relates to the technical field of nasal feeding catheter control devices, in particular to a method and a device for conducting pressure at the head end of a medical nasal feeding catheter to control steering.

Background

Nasal feeding, namely a nasal feeding method, is to manually put a stomach tube into an esophagus through a nasal cavity under special conditions, paste food by a grinding machine, connect a large food injection port below a stomach tube connector by a large syringe, manually pressurize a push rod piston to pump water and food into the stomach of a patient after firm connection, help the patient who cannot swallow independently to provide water and food, and maintain in-vivo metabolism, weight and nutrition. The stomach tube has thick and thin specifications, and the damage of the thin tube is small, so that the tube is easy to block. There is polyurethane or silica gel material, keeps somewhere the stomach tube in the esophagus, and the original alimentary canal physiological environment of patient is changed, keeps somewhere the stomach tube promptly and can lead to the distal sphincter of esophagus to close not tight, takes place the esophagus to flow backward easily, only temporarily or short-term is used for coma or can not swallow the patient of food by oneself, and the stomach tube should be fixed firmly, prevents to deviate from carelessly.

The existing nasal feeding catheter is inserted into the stomach, a little bit of nasal feeding catheter needs to be inserted deeply, the end of the catheter is pushed into the body through equipment such as air pressure, the catheter is bent, a device for pushing the catheter in response is not arranged, the catheter is pushed through the bent catheter matched with a worker, the speed cannot be accurately controlled, bending is easily caused, the catheter cannot smoothly enter, trouble and labor are wasted, and the vomit of a patient is serious.

Disclosure of Invention

The invention aims to provide a method and a device for conducting and steering the head end pressure of a medical nasal feeding catheter, which are convenient for the stable insertion of the catheter, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a device for conducting pressure at the head end of a medical nasal feeding catheter and controlling steering comprises a connecting component communicated with the catheter; the pushing assembly is used for matching with the connecting assembly to push and match the conduit during operation. Preferably, coupling assembling is including the expansion connecting pipe and the crooked connecting pipe that are the slope and distribute and communicate with the pipe and inject the connecting pipe, the expansion connecting pipe is used for the first controller of joint control expansion and shrink pipe, crooked connecting pipe is used for the third controller of the crooked pipe front end of joint control, it is used for the second controller that joint control injected the contrast medium to inject the connecting pipe into.

Preferably, the pushing assembly comprises a fixed plate fixedly connected with the guide pipe, the end part of the fixed plate is fixedly connected with a bottom support plate in sliding fit with the guide pipe, a contact plate in rolling fit with the guide pipe is arranged above the bottom support plate, the contact plate is rotatably connected with the fixed plate, and a rotating assembly for driving the contact plate to rotate is arranged between the contact plate and the first controller or the second controller or the third controller.

Preferably, the runner assembly include with the fixed plate rotates the first board that changes of connecting, first commentaries on classics board with contact plate normal running fit, first board side is equipped with the second and changes the board, the second changes the outer surface cover of board and is equipped with the lantern ring, lantern ring bottom fixedly connected with the fixed plate rotates the dwang of connecting, first commentaries on classics board with all rotate on the second changes the board and be connected with the rotary column, it has first loop bar, two to articulate on the rotary column the cover is equipped with first sleeve between the first loop bar, the second changes the board side and is equipped with and is used for driving board pivoted control assembly is changeed to the second, the dwang below is equipped with when switching first controller or second controller or third controller, drives the upset subassembly of control assembly position change.

Preferably, the control assembly includes the pinion rack of being connected with the elasticity plunger of first controller or second controller or third controller, the meshing has incomplete gear on the pinion rack, incomplete gear axis fixedly connected with head rod, the head rod surface has the second connecting rod of being connected fixedly with first controller or second controller or third controller through lasso normal running fit, head rod end fixedly connected with second loop bar, the cover is equipped with the second sleeve on the second loop bar, one of them the second sleeve end cover be equipped with second commentaries on classics board normal running fit's third loop bar, third loop bar tip is equipped with the third loop bar with angle variation between the second commentaries on classics board, and guarantee second commentaries on classics board pivoted adjusting part.

Preferably, the adjusting component comprises a fixed ball, a through groove is formed in the fixed ball, a first movable groove is formed in the side face of the second rotating plate, the first movable groove is fixedly connected with a limiting column matched with the through groove, and a limiting ring matched with the fixed ball in a pressing mode is fixedly connected to the inner wall of the first movable groove.

Preferably, the upset subassembly include with the dwang is connected fixed rotor plate, the rotor plate both ends with set up the spliced eye of mutually supporting on the fixed plate, the sliding tray has been seted up at the rotor plate middle part, sliding connection has the movable rod in the sliding tray, movable rod end rotate be connected with fixed telescopic link is connected to first sleeve, fixedly connected with on the movable rod with the fixed plate supports the steady board of press fit, the second movable groove has been seted up on the fixed plate, still set up on the fixed plate two with the draw-in groove of second movable groove intercommunication, the telescopic link with the cooperation of draw-in groove joint, it is located two to rotate on the fixed plate the bull stick between the recess, the telescopic link with the extension spring has been articulated between the bull stick.

Preferably, the tip of the catheter is provided with a through hole, the end part of the catheter is provided with an imaging ring, and the outer surface of the catheter is provided with an imaging hole matched with the imaging ring.

A method for conducting controllable steering by pressure at the head end of a medical nasal feeding catheter comprises the following steps;

s1, expanding, namely connecting the expansion connecting pipe with a first controller through the adjusting assembly, expanding the catheter, and synchronously pushing the catheter into the body while the first controller moves;

s2, injecting, namely connecting a second controller with the injection connecting pipe through the adjusting assembly, injecting a contrast medium, and simultaneously pushing the catheter to the body synchronously;

s3, bending, namely after the contrast agent is injected, enabling the catheter to enter a bending area in a human body, rotating the adjusting assembly by 180 degrees through the overturning assembly, enabling the third controller to be in plug-in fit with the bent connecting pipe, so that bending of the catheter is completed, and enabling the end part of the catheter to be inserted into a required position in the body through synchronous motion so as to facilitate subsequent treatment and eating work.

Compared with the prior art, the invention has the beneficial effects that:

when the controller is used for bending and other operations, the guide pipe is driven to carry out adaptive pushing movement, the controller and the pushing assembly are synchronously carried out to ensure that the guide is deeply, stably and quickly guided, and the mode is convenient to operate and high in controllability.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic side view of a portion of the present invention;

FIG. 3 is a side view of the disassembled structure of FIG. 2;

FIG. 4 is a side view of the connection assembly of FIG. 3 with the connection assembly removed;

FIG. 5 is a schematic view of the end portion of FIG. 4;

FIG. 6 is a schematic diagram of FIG. 5 with the structure broken away;

FIG. 7 is a schematic view of the second pivotal plate side end connection member shown in FIG. 6;

FIG. 8 is a schematic view of another end of the second rotating plate shown in FIG. 5;

FIG. 9 is a cross-sectional view of the second rotating plate shown in FIG. 8;

fig. 10 is a schematic view of fig. 9 with the structure broken away.

In the figure: 1-a catheter; 2-connecting the components; 3-a pinhole; 4-expanding the connecting pipe; 5-bending the connecting pipe; 6-injection connecting pipe; 7-rotating the rod; 8-a tension spring; 9-a contrast ring; 10-a push component; 11-a fixed plate; 12-a bottom pallet; 13-a contact plate; 14-a rotating assembly; 15-a first rotating plate; 16-a second rotating plate; 17-a collar; 18-rotating rods; 19-rotating the column; 20-a first loop bar; 21-a first sleeve; 22-a control assembly; 23-toothed plate; 24-incomplete gear; 25-a first connecting rod; 26-a second connecting rod; 27-a second loop bar; 28-a second sleeve; 29-a third set of rods; 30-an adjustment assembly; 31-a fixed ball; 32-through slots; 33-a first active slot; 34-a limiting column; 35-a limit ring; 36-a flip assembly; 37-a rotating plate; 38-a plug hole; 39-a sliding groove; 40-a movable rod; 41-a telescopic rod; 42-a stabilizing plate; 43-a second active slot; 44-card slot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-2, a device for conducting pressure at the head end of a medical nasal feeding catheter and controlling the direction of rotation thereof is shown, which comprises a connecting component 2 communicated with a catheter 1; the pushing assembly 10 is used for pushing and matching the guide pipe 1 when the matching connecting assembly 2 operates, and the pushing assembly 10 is arranged on the guide pipe 1.

Referring to fig. 2 to 3, the connecting assembly 2 includes an expansion connecting tube 4 and a bending connecting tube 5 which are obliquely arranged and are communicated with the catheter 1, the expansion connecting tube 4 is used for connecting a first controller for controlling the expansion and contraction of the catheter 1, the bending connecting tube 5 is used for connecting a third controller for controlling the front end of the bending catheter 1, and the injection connecting tube 6 is used for connecting a second controller for controlling the injection of the contrast agent.

Referring to fig. 4, the illustrated pushing assembly 10 includes a fixed plate 11 connected and fixed to the guide tube 1, a bottom support plate 12 slidably engaged with the guide tube 1 is fixedly connected to an end of the fixed plate 11, a contact plate 13 rolling engaged with the guide tube 1 is disposed above the bottom support plate 12, the contact plate 13 is rotatably connected to the fixed plate 11, and a rotating assembly 14 for driving the contact plate 13 to rotate is disposed between the contact plate 13 and the first controller, the second controller, or the third controller.

Referring to fig. 4-6, the rotating assembly 14 shown in the figure includes a first rotating plate 15 rotatably connected to the fixed plate 11, the first rotating plate 15 is rotatably engaged with the contact plate 13, a second rotating plate 16 is disposed on a side of the first rotating plate 15, a sleeve ring 17 is sleeved on an outer surface of the second rotating plate 16, a rotating rod 18 rotatably connected to the fixed plate 11 is fixedly connected to a bottom of the sleeve ring 17, rotating columns 19 are rotatably connected to the first rotating plate 15 and the second rotating plate 16, a first sleeve 20 is hinged to the rotating columns 19, a first sleeve 21 is sleeved between the two first sleeve rods 20, a control assembly 22 for driving the second rotating plate 16 to rotate is disposed on a side of the second rotating plate 16, and a turning assembly 36 for driving the control assembly 22 to change its position when the first controller, the second controller, or the third controller is switched is disposed below the rotating rod 18.

Referring to fig. 8-10, the control assembly 22 shown in the drawings includes a toothed plate 23 connected to an elastic plunger of the first controller, the second controller, or the third controller, an incomplete gear 24 is engaged on the toothed plate 23, a first connecting rod 25 is fixedly connected to a central shaft of the incomplete gear 24, a second connecting rod 26 fixedly connected to the first controller, the second controller, or the third controller is rotatably fitted to an outer surface of the first connecting rod 25 through a ferrule, a second sleeve 27 is fixedly connected to an end of the first connecting rod 25, a second sleeve 28 is fitted over the second sleeve 27, a third sleeve 29 rotatably fitted to the second rotating plate 16 is fitted to an end of one of the second sleeves 28, an angle between the third sleeve 29 and the second rotating plate 16 is changed at an end of the third sleeve 29, and an adjusting assembly 30 for ensuring rotation of the second rotating plate 16 is provided.

Wherein, the tip of the catheter 1 is provided with a through hole, the end part of the catheter 1 is provided with an angiography ring 9, and the outer surface of the catheter 1 is provided with an angiography hole 3 matched with the angiography ring 9.

s1, expanding, namely connecting an expansion connecting pipe 4 with a first controller through an adjusting assembly 30, expanding a catheter 1, and synchronously pushing the catheter 1 into a human body while the first controller moves;

s2, injecting, namely connecting a second controller with an injection connecting pipe 6 through an adjusting assembly 30, injecting a contrast agent, and simultaneously pushing the catheter 1 into the body synchronously;

s3, bending, wherein after the contrast agent is injected, the catheter 1 enters a bending region in a human body, the adjusting assembly 30 is rotated by 180 degrees through the overturning assembly 36, the third controller is in plug-in fit with the bent connecting pipe 5, so that the bending of the catheter 1 is completed, the end part of the catheter 1 is inserted into a required reaching position in the body through synchronous motion, and the subsequent treatment and eating work are facilitated.

In this embodiment, the catheter 1 is inserted into a human body to a shallow depth at the beginning, the first controller is connected to the expandable connecting tube 4 to expand the catheter 1, the second controller is connected to the injection connecting tube 6 to inject a contrast medium into the catheter 1, the end of the catheter 1 enters a bent region in the human body, the third controller is connected to the bent connecting tube 5 through the inversion assembly 36 to complete the bending of the catheter 1, and the first controller, the second controller and the third controller all drive the pushing assembly to move when operating, and the specific movement is as follows:

the second sleeve 28 and the third sleeve 29 are fixedly inserted and fixed, the other second sleeve 28 is manually rotated (or an external motor can be used for operating), the incomplete gear 24 is driven by the first connecting rod 25 to rotate, the toothed plate 23 is driven to press down, and the elastic plungers in the three controllers are pressed (in the prior art, the bottoms of the elastic plungers are provided with elastic members such as compression springs and the like, continuous force is not applied, the elastic plungers can reset upwards, in the prior art, the controllers continuously operate by extruding the elastic plungers in a reciprocating manner), under the characteristic of the elastic plungers, the first connecting rod 25 is continuously rotated to enable the elastic plungers to do reciprocating motion by matching with the action of the incomplete gear 24, so that the controllers continuously operate, the second rotating plate 16 is rotated by the third sleeve 29 through the adjusting component 30, so that the rotating column 19 is driven to do circular motion, the first sleeve 20 and the first sleeve 21 are driven to rotate (the rotating component 36 enables the motion of the first sleeve 20 and the second sleeve 27 to be in a horizontal state all the time), thereby drive first rotor plate 15 and rotate, first rotor plate 15 makes contact plate 13 rotate to make contact plate 13 drive pipe 1 on the bottom plate board 12 and slide, wherein fixed plate 11 is connected the accessible snap ring joint with pipe 1 or glues modes such as gluing and fix.

Example two

Referring to fig. 8-10, the adjusting assembly 30 shown in the drawings includes a fixed ball 31, a through groove 32 is formed on the fixed ball 31, a first movable groove 33 is formed on the side surface of the second rotating plate 16, a limiting post 34 engaged with the through groove 32 is fixedly connected in the first movable groove 33, and a limiting ring 35 engaged with the fixed ball 31 in a pressing manner is fixedly connected on the inner wall of the first movable groove 33.

In this embodiment, after the angle of the third loop bar 29 is changed, the fixing ball 31 is driven to rotate, the limiting column 34 is movable and automatically adjusts the position in the through groove 32, the fixing ball 31 is always located in the first movable groove 33, and the second rotating plate 16 is rotated along the loop 17 through the limiting column 34.

EXAMPLE III

Referring to fig. 5-7, the turning assembly 36 shown in the figure includes a rotating plate 37 connected and fixed to the rotating rod 18, inserting holes 38 are formed in two ends of the rotating plate 37 and the fixed plate 11, the middle of the rotating plate 37 is provided with a sliding groove 39, a movable rod 40 is slidably connected to the sliding groove 39, an end of the movable rod 40 is rotatably connected to a telescopic rod 41 connected and fixed to the first sleeve 21, the movable rod 40 is fixedly connected to a stationary plate 42 in press fit with the fixed plate 11, the fixed plate 11 is provided with a second movable groove 43, the fixed plate 11 is further provided with two clamping grooves 44 communicated with the second movable groove 43, the telescopic rod 41 is in clamping fit with the clamping grooves 44, the fixed plate 11 is rotatably connected to the rotating rod 7 located between the two grooves, and a tension spring 8 is hung between the telescopic rod 41 and the rotating rod 7.

In this embodiment, when the third controller is operated, the third sleeve 29 is located on one side of the first controller, and after the position needs to be adjusted, the second sleeve 28 on the third controller is inserted and fixed with the third sleeve 29, the second rotating plate 16 is rotated along the rotating rod 18, the first sleeve 20 is hinged and matched with the rotating column 19, the rotating plate 37 is rotated, the inclined rotating plate 37 makes one end of the movable rod 40 slide in the sliding groove 39, so that the telescopic rod 41 is disengaged and matched with the groove, the telescopic rod 41 moves in the second movable groove 43, the first sleeve 20 and the second sleeve 28 are matched, the rotating plate 37 and the second rotating plate 16 are rotated 180 degrees, the adjusted rotating plate 37 is fixed with the fixed plate 11 through the inserting hole 38 and the bolt, the position of the sliding groove 39 is consistent with the initial position, the telescopic rod 41 is returned to the groove again under the action of the tension spring 8 (manually shifting if necessary, the telescopic rod 41 is clamped into the other groove), so that the position switching of the third sleeve 29 is completed, and the second sleeve 28 of the third controller is conveniently spliced with the third sleeve 29; it is worth noting that: under the effect of the stabilizing plate 42, the telescopic rod 41 is always in a vertical state, so that the first sleeve 20 and the first sleeve 21 are always in a horizontal state when operating, and the rotating state of the first rotating plate 15 is ensured. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims

1. A device for conducting pressure at the head end of a medical nasal feeding catheter to control steering is characterized by comprising:

a connecting component (2) communicated with the conduit (1);

the pushing assembly (10) is used for matching with the conduit (1) in a pushing fit mode when the connecting assembly (2) operates, and the pushing assembly (10) is arranged on the conduit (1).

2. The device for conducting pressure and controllably steering the head end of the medical nasal feeding catheter according to claim 1, wherein: coupling assembling (2) including be the slope and distribute and with expansion connecting pipe (4) and crooked connecting pipe (5) and the injection connecting pipe (6) of pipe (1) intercommunication, expansion connecting pipe (4) are used for the first controller of joint control expansion and shrink pipe (1), crooked connecting pipe (5) are used for the third controller of the crooked pipe (1) front end of joint control, injection connecting pipe (6) are used for the second controller that joint control injected the contrast agent.

3. The device for conducting pressure and controllably steering the head end of the medical nasal feeding catheter according to claim 2, wherein: the pushing assembly (10) comprises a fixing plate (11) fixedly connected with the guide pipe (1), the end of the fixing plate (11) is fixedly connected with a bottom supporting plate (12) in sliding fit with the guide pipe (1), a contact plate (13) in rolling fit with the guide pipe (1) is arranged above the bottom supporting plate (12), the contact plate (13) is rotatably connected with the fixing plate (11), and a rotating assembly (14) for driving the contact plate (13) to rotate is arranged between the contact plate (13) and the first controller or the second controller or the third controller.

4. The device for conducting pressure and controllably steering the head end of the medical nasal feeding catheter according to claim 3, wherein: the runner assembly (14) include with fixed plate (11) rotate the first board (15) of changeing of connecting, first commentaries on classics board (15) with contact plate (13) normal running fit, first commentaries on classics board (15) side is equipped with second commentaries on classics board (16), second commentaries on classics board (16) surface cover is equipped with lantern ring (17), lantern ring (17) bottom fixedly connected with fixed plate (11) rotate dwang (18) of connecting, first commentaries on classics board (15) with all rotate on second commentaries on classics board (16) and be connected with rotary column (19), it has first loop bar (20) to articulate on rotary column (19), two the cover is equipped with between first loop bar (20) first sleeve (21), second commentaries on classics board (16) side is equipped with and is used for driving second commentaries on classics board (16) pivoted control assembly (22), when dwang (18) below is equipped with and switches first controller or second controller or third controller, and the overturning component (36) drives the control component (22) to change the position.

5. The device for conducting pressure and controllably steering the head end of the medical nasal feeding catheter according to claim 4, wherein: the control assembly (22) comprises a toothed plate (23) connected with an elastic plunger of a first controller or a second controller or a third controller, an incomplete gear (24) is meshed on the toothed plate (23), a first connecting rod (25) is fixedly connected to a middle shaft of the incomplete gear (24), a second connecting rod (26) fixedly connected with the first controller or the second controller or the third controller is arranged on the outer surface of the first connecting rod (25) in a rotating fit mode through a ferrule, a second sleeve rod (27) is fixedly connected to the end of the first connecting rod (25), a second sleeve (28) is sleeved on the second sleeve rod (27), a third sleeve rod (29) rotatably matched with the second rotating plate (16) is sleeved on one end of the second sleeve rod (28), and the end of the third sleeve rod (29) is provided with the angle change between the third sleeve rod (29) and the second rotating plate (16), and an adjustment assembly (30) for ensuring the rotation of the second rotary plate (16).

6. The device for conducting pressure and controllably steering the head end of the medical nasal feeding catheter according to claim 4, wherein: adjusting part (30) are including fixed ball (31), logical groove (32) have been seted up on fixed ball (31), first activity groove (33) have been seted up to second commentaries on classics board (16) side, fixedly connected with in first activity groove (33) in lead to groove (32) complex spacing post (34), fixedly connected with on first activity groove (33) inner wall with fixed ball (31) support press fit's spacing collar (35).

7. The device for conducting pressure and controllably steering the head end of the medical nasal feeding catheter according to claim 4, wherein: the turnover component (36) comprises a rotating plate (37) fixedly connected with the rotating rod (18), inserting holes (38) which are mutually adaptive are formed in the two ends of the rotating plate (37) and the fixed plate (11), a sliding groove (39) is formed in the middle of the rotating plate (37), a movable rod (40) is connected in the sliding groove (39) in a sliding mode, an expansion rod (41) fixedly connected with the first sleeve (21) is connected at the end of the movable rod (40) in a rotating mode, a stable plate (42) in press fit with the fixed plate (11) is fixedly connected on the movable rod (40), a second movable groove (43) is formed in the fixed plate (11), two clamping grooves (44) communicated with the second movable groove (43) are further formed in the fixed plate (11), the expansion rod (41) is in clamping fit with the clamping grooves (44), and a rotating rod (7) positioned between the two grooves is rotatably connected on the fixed plate (11), a tension spring (8) is hung between the telescopic rod (41) and the rotating rod (7).

8. The device for conducting pressure and controllably steering the head end of the medical nasal feeding catheter according to claim 1, wherein: the tip of the catheter (1) is provided with a through hole, the end part of the catheter (1) is provided with an angiography ring (9), and the outer surface of the catheter (1) is provided with an angiography hole (3) matched with the angiography ring (9).

9. The method for conducting and controlling the steering of the head end pressure of the medical nasal feeding catheter according to the claims 1-8, which is characterized by comprising the following steps;

s1, expanding, namely connecting the expansion connecting pipe (4) with a first controller through the adjusting assembly (30), expanding the catheter (1), and synchronously pushing the catheter (1) into the body while the first controller moves;

s2, injecting, namely connecting a second controller with the injection connecting pipe (6) through the adjusting assembly (30), injecting a contrast medium, and simultaneously pushing the catheter (1) into the body synchronously;

s3, bending, wherein after the contrast agent is injected, the catheter (1) enters a bending region in a human body, the adjusting assembly (30) is rotated by 180 degrees through the overturning assembly (36), the third controller is in plug-in fit with the bent connecting pipe (5), so that the bending of the catheter (1) is completed, the end part of the catheter (1) is inserted into a required reaching position in the human body through synchronous motion, and the subsequent treatment and feeding work are facilitated.