CN212880583U

CN212880583U - Double-side traction type super-selection catheter

Info

Publication number: CN212880583U
Application number: CN202020698925.9U
Authority: CN
Inventors: 刘丹青
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-04-06
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a double-side drawing type over-selection catheter, which is characterized in that 2 wire drawing cavities along the extension direction of a catheter body are arranged in a catheter cup body in addition to a wire guide cavity, the front end of the wire drawing cavity extends forwards to the outer wall of the front part of the catheter body, and the rear end of the wire drawing cavity extends backwards to the rear end of the catheter body or the outer wall of the rear part of the catheter body; the wire drawing cavity is internally provided with a wire drawing, the front end of the wire drawing extends out from the front end of the wire drawing cavity and is fixedly connected to the catheter body positioned in front of the wire drawing cavity, and the rear end of the wire drawing extends backwards along the wire drawing cavity and extends out of the rear end of the wire drawing cavity; the control handle at the rear end of the catheter body is provided with a wire drawing winding and unwinding device which corresponds to a wire drawing and is connected with the rear end of the wire drawing for drawing or releasing the wire drawing, so that the lateral bending of the front end of the catheter body can be adjusted in real time, and the over-selected catheter can conveniently and smoothly enter a human body pipeline.

Description

Double-side traction type super-selection catheter

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to two side tractive type hyperelection pipes.

Background

Endoscopic Retrograde Cholangiopancreatography (ERCP) is a technique in which a duodenoscope is inserted into the descending part of the duodenum to find the duodenal papilla, a contrast catheter is inserted into the opening of the papilla from a biopsy channel, and a contrast medium is injected into the opening of the duodenal papilla to perform x-ray radiography to display the cholangiopancreatography. Because ERCP does not need to be operated, the trauma is small, the operation time is short, the complication is less than that of the surgical operation, the hospitalization time is greatly shortened, and the ERCP is popular with patients. ERCP has achieved great clinical results in a few decades, and has become an important treatment means for pancreatic and biliary diseases today. In the ERCP operation, the hyper-selection of the duodenal papilla sphincter intubation and the left and right hepatic ducts can be completed only by depending on rich experience of clinicians, the rich clinical experience depends on long-time accumulation, the doctors who just develop the ERCP are difficult, the upper and lower angles of the duodenal papilla intubation and the visual range of an endoscope are very relevant to the corresponding angle of the direction of the apparatus after the apparatus is discharged from a clamp channel and the papilla, and a large amount of time is usually spent in the clinic in the process. For the over-selection of the left and right hepatic ducts (selecting the left and right hepatic ducts), the clinician needs to continuously adjust the duodenoscope forceps raising device and the duodenoscope to obtain the direction change of the guide wire, and this link usually consumes a lot of time. These two links also open x-ray continuously, which is a risk of too much radiation damage to both the doctor and the patient. It is clinically desirable to have an instrument specifically designed for intubation and over-selection.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a bilateral traction type over-selection catheter.

In order to realize the purpose, the utility model discloses a technical scheme is: a double-sided pull-type over-selection catheter, comprising:

the catheter comprises a catheter body made of PTFE (polytetrafluoroethylene), wherein a wire guide cavity is arranged in the catheter body along the axial direction of the catheter body, the front end of the wire guide cavity extends forwards to the front end of the catheter body, and the rear end of the wire guide cavity extends backwards to the rear end of the catheter body or the outer wall of the rear part of the catheter body; the catheter body is internally provided with 2 wire drawing cavities staggered from the wire guide cavity in the extending direction of the catheter body, the front ends of the wire drawing cavities extend forwards to the outer wall of the front part of the catheter body, and the rear ends of the wire drawing cavities extend backwards to the rear end of the catheter body or the outer wall of the rear part of the catheter body;

2 wire drawing wires are respectively arranged in the wire drawing cavities in a penetrating mode, the front ends of the wire drawing wires extend out from the front ends of the wire drawing cavities and are fixedly connected to the guide pipe body located in front of the wire drawing cavities, and the rear ends of the wire drawing wires extend backwards along the wire drawing cavities and extend out of the rear ends of the wire drawing cavities;

the control handle is arranged at the rear end of the catheter body, the control handle is provided with a wire drawing retracting and releasing device which corresponds to the wire drawing and is connected with the rear end of the wire drawing, the wire drawing is pulled or released, and when one of the wire drawing is pulled backwards, the front end of the catheter body can be bent towards one pulled side.

Preferably, the 2 wire drawing cavities are all parallel to the wire guide cavity and are respectively arranged on the left side and the right side of the wire guide cavity.

Furthermore, the rear end of the guide wire cavity extends backwards to the outer wall of the rear part of the catheter body, a guide wire port is formed in the catheter body located at the rear end of the guide wire cavity, and the guide wire can be inserted into the rear end of the guide wire cavity through the guide wire port and extends forwards out of the front end of the guide wire cavity.

Further, the wire drawing retracting and releasing device is 2 slip rings which are arranged on the control handle and correspond to wire drawing, and gears are arranged inside the slip rings; the rear end of the drawn wire is connected to the corresponding sliding ring, the control handle is further provided with a guide rod used for guiding the sliding ring in a front-and-back sliding mode, the rear portion of the guide rod is further provided with inverted teeth used for being meshed with the gear, and the sliding ring cannot slide forwards due to the drawing effect of the drawn wire through the meshing effect of the gear and the inverted teeth.

Further, for convenient clear field of vision, this internal wire guide chamber and the wire drawing chamber of staggering of pipe still are equipped with the water injection chamber along pipe extending direction, the front end in water injection chamber extends to the front end of pipe body forward, the rear end in water injection chamber extends to the rear end of pipe body or the outer wall at pipe body rear portion backward. Or, this internal silk guide chamber and the wire drawing chamber of staggering of pipe still are equipped with the water injection chamber along pipe extending direction, the front end in water injection chamber extends to the front end of pipe body forward, the rear end in water injection chamber extends to the outer wall at pipe body rear portion backward, and is located to be equipped with the water injection port that communicates with the water injection chamber on the pipe body of water injection chamber rear end. Furthermore, in order to more conveniently enter the human body pipeline, the front end of the catheter body is tapered forwards.

The wire drawing machine further comprises 2 rotating buttons which correspond to the wire drawing one by one, the rotating buttons are rotatably mounted on the control handle, guide channels along the front and back directions are formed in the rotating buttons, sliding blocks are arranged in the guide channels, the sliding blocks are in guide fit with the guide channels and can slide back and forth along the guide channels, the rear ends of the wire drawing penetrate backwards through the guide channels and extend backwards to the wire drawing retracting and releasing device, and the sliding blocks are fixedly connected with the wire drawing; when the rotary knob is rotated around the wire drawing, the sliding block rotates along with the rotary knob to drive the wire drawing to rotate, and the front end of the guide pipe body can be driven to rotate when the wire drawing is rotated. Through the optimization, the rotation of the catheter body is realized, and the superconducting pipe can enter a human body smoothly and conveniently by combining the head part capable of being bent laterally.

Compared with the prior art, the utility model discloses the technological effect who gains does: according to the bilateral traction type over-selection catheter, when a catheter is inserted into a ring, the catheter is controlled and adjusted by a wire drawing and retracting device near a nipple, the existing duodenal nipple incision knife is a pre-bending and unidirectional bow-drawing mode, the catheter is a bidirectional bow-drawing mode, the position can be effectively and timely adjusted, a guide wire can be smoothly inserted into the nipple opening, the tapered head of the catheter can be rapidly followed, and the over-selection catheter can be finely adjusted left and right and up and down in the nipple under the control of a duodenoscope and a lifting clamp, so that the guide wire can enter a required biliary tract or pancreatic duct. When entering the hepatic duct and needing left-right super selection, the super selection catheter can easily adjust the left-right direction, and has obvious advantages compared with the nipple incision knife but adjust the direction.

Drawings

Fig. 1 is a schematic structural view of a double-side pulling type super catheter according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view in the direction a-a of a double-sided pull-type hyperselection catheter in an embodiment of the invention.

Fig. 3 is a cross-sectional view in the direction B-B of a double-sided pull-type hyperselection catheter in an embodiment of the invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a cross-sectional view in the direction of C-C of a double-sided pull-type hyperselection catheter in an embodiment of the invention.

Fig. 6 is a schematic view of a double-sided pull-type hyperselective catheter according to an embodiment of the present invention, wherein one side of the hyperselective catheter is pulled to bend laterally during use.

Fig. 7 is a schematic view of a double-sided pull type hyperselective catheter in an embodiment of the present invention, wherein the opposite side is pulled to bend laterally during use.

Fig. 8 is a schematic structural view of a rotary knob in a double-side pulling type super-selective catheter according to an embodiment of the present invention.

Fig. 9 is a sectional view taken in the direction D-D in fig. 8.

Fig. 10 is a sectional view taken in the direction of E-E in fig. 8.

The reference numbers in the figures are: 1. the novel catheter comprises a catheter body, a guide wire cavity, a control handle, a sliding ring, a water injection cavity, a guide wire port, a guide rod, a pawl, a rotating button, a guide channel and a sliding block, wherein the guide wire cavity is 2, the guide wire cavity is 3, the guide wire cavity is 4, the control handle is 5, the.

Detailed Description

The utility model discloses not confine the following embodiment to, general technical personnel in this field can adopt other multiple embodiment to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The utility model discloses a concrete embodiment is shown in fig. 1 to fig. 10, a two side tractive type surpass selects pipe, including the pipe body 1 of PTFE material, pipe body 1 is equipped with along 1 axial guide wire chamber 2 of pipe body for having elastic straight shape tubular structure in the pipe body 1, and the front end in guide wire chamber 2 extends to the front end of pipe body 1 forward, and the rear end in guide wire chamber 2 extends to the outer wall at the rear portion of pipe body 1 backward. Staggered guide wire chamber 2 is equipped with 2 wire drawing chambeies 3 along 1 extending direction of pipe body in the pipe body 1, and the front end in wire drawing chamber 3 extends to the outer wall of the front portion of pipe body 1 forward, and the rear end in wire drawing chamber 3 extends to the outer wall at the rear end of pipe body 1 or the rear portion of pipe body 1 backward.

The device is characterized by further comprising 2 wire drawing units 4 which are respectively arranged in the wire drawing cavity 3 in a penetrating mode, wherein the front ends of the wire drawing units 4 extend out of the front end of the wire drawing cavity 3 and are fixedly connected to the catheter body 1 located in front of the wire drawing cavity 3, and the rear ends of the wire drawing units 4 extend backwards along the wire drawing cavity 3 and extend out of the rear end of the wire drawing cavity 3.

The novel catheter is characterized by further comprising a control handle 5 arranged at the rear end of the catheter body 1, wherein a wire drawing winding and unwinding device corresponding to a wire drawing 4 is arranged on the control handle 5, the rear end of the wire drawing 4 is fixedly connected to the wire drawing winding and unwinding device and used for drawing or releasing the wire drawing 4, when the novel catheter is used, the corresponding wire drawing 4 is pulled backwards by adjusting the wire drawing winding and unwinding device, the front end of the catheter body 1 can be bent towards one side of the pulled side, after the wire drawing winding and unwinding device is reset, the wire drawing 4 loses backward drawing effect and is automatically released, and then the front end of the catheter body 1 can be restored to be straight due to the loss of the drawing effect.

Specifically, 2 wire drawing cavities 3 are parallel to the wire guiding cavity 2 and are respectively arranged on the left side and the right side of the wire guiding cavity 2. The rear end of the guide wire cavity 2 extends backwards to the outer wall of the rear part of the catheter body 1, a guide wire port 8 is arranged on the catheter body 1 positioned at the rear end of the guide wire cavity 2, and the guide wire can be inserted into the rear end of the guide wire cavity 2 through the guide wire port 8 and extends forwards through the front end of the guide wire cavity 2.

The rear end of pipe body 1 is equipped with brake valve lever 5, is equipped with 2 sliding rings 6 that correspond with wire drawing 4 on brake valve lever 5, sliding ring 6 is one kind of wire drawing winding and unwinding devices promptly, and the rear end of wire drawing 4 is connected on the sliding ring 6 that corresponds with it, still is equipped with the guide bar that is used for sliding guide around the sliding ring 6 on the handle, and the rear portion of guide bar still is equipped with pawl 11, and through pawl 11 sliding ring 6 can not be because of the tractive effect of wire drawing 4 slides forward.

This internal staggering wire guide chamber 2 of pipe and wire drawing chamber 3 still are equipped with water injection chamber 7 along pipe extending direction, and the front end of water injection chamber 7 extends to the front end of pipe body 1 forward, and the rear end of water injection chamber 7 extends to the outer wall at pipe body 1 rear portion backward. The rear end of the water injection cavity 7 extends backwards to the outer wall at the rear part of the catheter body 1, and a water injection port 9 communicated with the water injection cavity 7 is arranged on the catheter body 1 at the rear end of the water injection cavity 7. In the process of leading in, water can be injected into the guide wire cavity 2, so that the visual field is clear.

Still include with 4 one-to-one of wire drawing 2 knob, both ends are equipped with along axial installation axle around the knob, and the knob rotates and installs on control handle 5 through the installation axle, stirs the knob, can make the knob around installation axle axial rotation. The inside of knob is equipped with along the direction of going back and forth's guide way 13, is equipped with slider 14 in the guide way 13, and slider 14 and guide way 13 direction cooperation just can follow guide way 13 and slide from beginning to end, and the rear end of wire drawing 4 is worn out and is extended to wire drawing winding and unwinding devices backward via guide way 13, slider 14 and wire drawing 4 fixed connection. Also be that the knob rotates around installation axle when 4 rotatory knobs around the wire drawing, because guide channel 13's limiting displacement, slider 14 rotates and then drives the wire drawing 4 rotatory along with it, can drive the front end rotation of pipe body 1 when 4 rotatory wire drawing. Through the optimization, the rotation of the catheter body 1 is realized, and the superconducting catheter can enter a human body smoothly and conveniently by combining the head capable of being bent laterally.

Above, only the preferred embodiment of the present invention is described, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention, and all the technical solutions and concepts of the present invention should be covered within the protection scope of the present invention.

Claims

1. A two-sided pulling type hyper-selective catheter is characterized in that: the method comprises the following steps:

the catheter comprises a catheter body (1) made of PTFE (polytetrafluoroethylene), wherein a guide wire cavity (2) extending along the axial direction of the catheter body (1) is arranged in the catheter body (1); the catheter body (1) is internally provided with 2 wire drawing cavities (3) staggered from the wire guide cavity (2) along the extension direction of the catheter body (1), and the axes of the wire guide cavity (2) and the wire drawing cavities (3) are parallel to each other;

2 wire drawing rods (4) respectively penetrating in the wire drawing cavity (3), wherein the front ends of the wire drawing rods (4) extend out from the front ends of the wire drawing cavities (3) and are fixedly connected to the catheter body (1) positioned in front of the wire drawing cavities (3), and the rear ends of the wire drawing rods (4) extend backwards along the wire drawing cavities (3) and extend out of the rear ends of the wire drawing cavities (3);

the guide pipe comprises a control handle (5) arranged at the rear end of a guide pipe body (1), wherein a wire drawing winding and unwinding device which corresponds to a wire drawing (4) and is connected with the rear end of the wire drawing (4) is arranged on the control handle (5) and is used for drawing or releasing the wire drawing (4), and when one of the wire drawing (4) is drawn backwards, the front end of the guide pipe body (1) can be bent towards one side to be drawn.

2. The double-sided pull-type hyperelective catheter of claim 1, wherein: 2 drawing chamber (3) all be located the coplanar with the central axis in seal wire chamber (2), just 2 drawing chamber (3) set up respectively in the left and right sides in seal wire chamber (2).

3. The double-sided pull-type hyperelective catheter of claim 1, wherein: the rear end of seal wire chamber (2) backward extends to the outer wall at pipe body (1) rear portion, and is equipped with seal wire port (8) on pipe body (1) that is located seal wire chamber (2) rear end, and the seal wire can insert the rear end in seal wire chamber (2) via seal wire port (8) to stretch out the front end in seal wire chamber (2) forward.

4. The double-sided pull-type hyperelective catheter of claim 1, wherein: the wire drawing winding and unwinding device is 2 sliding rings (6) which are arranged on the control handle (5) and correspond to the wire drawing wires (4), and gears are arranged inside the sliding rings (6); the rear end of the drawn wire (4) is connected to the corresponding sliding ring (6), the control handle (5) is further provided with a guide rod (10) used for guiding the sliding ring (6) in a front-and-back sliding mode, the rear portion of the guide rod is further provided with inverted teeth (11) used for being meshed with the gear, and the sliding ring (6) cannot slide forwards due to the drawing effect of the drawn wire (4) through the meshing effect of the gear and the inverted teeth (11).

5. The double-sided pull-type hyperelective catheter of claim 1, wherein: the wire drawing winding and unwinding device is a knob which is arranged on the control handle (5) and is correspondingly connected with the wire drawing (4), the rear end of the wire drawing (4) is connected to the knob corresponding to the wire drawing, and the winding and unwinding of the wire drawing (4) are realized by rotating the knob.

6. The double-sided pull-type hyperelective catheter of claim 1, wherein: staggered guide wire chamber (2) and wire drawing chamber (3) in pipe body (1), still be equipped with water injection chamber (7) along pipe extending direction, the front end of water injection chamber (7) extends to the front end of pipe body (1) forward, the rear end ranging back to the rear end of pipe body (1) of water injection chamber (7).

7. The double-sided pull-type hyperelective catheter of claim 1, wherein: staggered guide wire chamber (2) and wire drawing chamber (3) still are equipped with water injection chamber (7) along pipe extending direction in pipe body (1), the front end of water injection chamber (7) extends to the front end of pipe body (1) forward, the rear end of water injection chamber (7) extends to the outer wall at pipe body (1) rear portion backward, and is located and is equipped with water injection port (9) with water injection chamber (7) intercommunication on pipe body (1) of water injection chamber (7) rear end.

8. The double-sided pull-type hyperelective catheter of claim 1, wherein: the front end of the catheter body (1) is tapered forwards.

9. The double-sided pull-type hyperelective catheter of claim 1, wherein: the wire drawing machine is characterized by further comprising 2 rotating buttons (12) which correspond to the wire drawing wires (4) one by one, wherein the rotating buttons (12) are rotatably installed on the control handle (5), guide channels (13) in the front and back directions are formed in the rotating buttons (12), sliding blocks (14) are arranged in the guide channels (13), the sliding blocks (14) are in guide fit with the guide channels (13) and can slide back and forth along the guide channels (13), the rear ends of the wire drawing wires (4) penetrate out backwards through the guide channels (13) and extend backwards to a wire drawing winding and unwinding device, and the sliding blocks (14) are fixedly connected with the wire drawing wires (4); when the rotating button (12) is rotated around the wire drawing (4), the sliding block (14) rotates along with the wire drawing (4) to drive the wire drawing (4) to rotate, and the front end of the catheter body (1) can be driven to rotate when the wire drawing (4) rotates.