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CN-121987930-A - Adjustable curved catheter with expandable self-adaptive snake bone structure and processing method thereof

CN121987930ACN 121987930 ACN121987930 ACN 121987930ACN-121987930-A

Abstract

The invention discloses an adjustable bending catheter with expandable self-adaptive snake bone structure and a processing method thereof, relating to the sheath tube field, wherein radial expansion joints are arranged on the snake bone tube, the expansion joints divide the snake bone tube into a plurality of radial expansion parts, when an implantation instrument passes through in the operation process, if the radial supporting force of the snake bone tube reaches a set threshold value, the expansion parts can adaptively deform and expand outwards under the support of the instrument, thereby improving the trafficability of the instrument, the device has the advantages that the blocking phenomenon is effectively avoided, radial tension disappears after the device passes through, the snake bone tube is restored to the original state by virtue of the flexibility of the metal material of the snake bone tube and the elastic contraction effect of the external protection tube, the good trafficability and the restorability are realized on the premise that the overall outer diameter of the catheter is not increased, and the back expansion structure or the lateral expansion structure or the fracture expansion structure can be formed on the snake bone tube by adjusting the position and the structure of the bending expansion joint so as to adapt to different use requirements.

Inventors

  • HUANG WENXI

Assignees

  • 苏州拓迈医学技术有限公司

Dates

Publication Date
20260508
Application Date
20260203

Claims (10)

  1. 1. An adjustable bending catheter with an expandable self-adaptive snake bone structure comprises an inner tube, a snake bone tube and an outer protection tube which are sequentially arranged from inside to outside, and is characterized in that one side of the snake bone tube is provided with a plurality of bending grooves which are distributed along the axial direction, the other side of the snake bone tube is provided with a plurality of bending expansion joints which are distributed along the axial direction, the snake bone tube can be bent towards one side of the bending grooves, and the gaps of the bending expansion joints can be expanded and increased when the snake bone tube is bent; the snake bone tube is also provided with a radial expansion joint, the radial expansion joint can be divided on the snake bone tube to form a radial expansion part, and the radial expansion part can be expanded and deformed outwards when being subjected to an outward supporting force so as to increase the passing inner diameter of the snake bone tube.
  2. 2. The adjustable bend catheter with expandable adaptive snake bone structure of claim 1, wherein the plurality of bending grooves and the plurality of bending expansion joints are staggered in sequence along the axial direction of the snake bone tube.
  3. 3. The adjustable bend catheter with expandable adaptive snake bone structure of claim 1 wherein a plurality of said radially expanded slits are formed in said snake bone tube on a side opposite said bending grooves to form a plurality of radially expanded portions by dividing at the back of the bending grooves.
  4. 4. The adjustable bend catheter with expandable adaptive snake bone structure of claim 1, wherein the radial expansion joints are distributed along the axial direction of the snake bone tube and are respectively arranged at two sides of the bending groove so as to form a plurality of radial expansion parts by dividing at two sides of the bending groove.
  5. 5. A processing method of an adjustable bending catheter with an expandable self-adaptive snake bone structure is characterized by comprising the following specific steps: preparing an inner tube and an outer protective tube by extrusion molding; Pushing and conveying the pipe material into a laser cutting device through a pipe material pushing and conveying device, and cutting and processing the pipe material into a snake bone pipe through the laser cutting device; Penetrating the inner pipe into the snake bone pipe, sleeving an outer protection pipe outside the snake bone pipe, and preliminarily forming a composite pipeline structure; the composite pipeline structure is heated by the heating equipment, the outer protective tube is heated and contracted to generate uniform radial pressure, the outer protective tube is clung to the surface of the snake bone tube, meanwhile, the inner tube is softened and expanded by heat, the inner tube is clung to the inner wall of the snake bone tube and is partially embedded into a cutting seam on the snake bone tube, so that tight mechanical interlocking is formed, and the inner tube, the snake bone tube and the outer protective tube are assembled to form an adjustable bent catheter.
  6. 6. The method of claim 5, wherein the tubing is pushed into the cabinet by the tubing pushing and conveying device when the snake bone tube is cut; The pipe positioning driving part in the cabinet clamps and positions the pipe, drives the pipe to axially reciprocate and translate and drive the pipe to axially reciprocate and rotate along the circumferential direction, so that the laser cutting head can cut and process the pipe in the axial direction and the circumferential direction, and bending grooves, bending expansion joints and radial expansion joints are gradually cut and processed on the pipe; one end of the pipe which is cut and processed is gradually moved and inserted on the surface of the auxiliary positioning part, so that the inner support and positioning are carried out on the cut and processed end of the pipe through the auxiliary positioning part; After the snake bone tube is formed by cutting on the tube, the snake bone tube and the tube body are cut off and separated by the laser cutting of the laser cutting head, the cut snake bone tube is sleeved on the surface of the auxiliary positioning part in a sliding mode, then the auxiliary positioning part is adjusted to be in an inclined discharging state, and the supporting outer diameter shrinkage of the auxiliary positioning part is reduced, so that the outer wall of the auxiliary positioning part is separated from the inner wall of the snake bone tube, and the snake bone tube can be discharged from the inclined auxiliary positioning part in a sliding mode.
  7. 7. The method of claim 6, wherein when the pipe positioning driving part drives the pipe to move and rotate to perform laser cutting, the sliding supporting part is used for sliding supporting and limiting one side of a pipe laser cutting machining point, and the sliding supporting part and the auxiliary positioning part are used for respectively sliding supporting and limiting two sides of the pipe cutting point so as to improve the stability of the pipe cutting point.
  8. 8. The processing equipment of the adjustable bent catheter with the expandable self-adaptive snake bone structure is characterized by comprising a pipe pushing and conveying equipment and a laser cutting equipment, wherein the pipe pushing and conveying equipment can convey pipe pushing materials into the laser cutting equipment, and then the laser cutting equipment cuts and processes the pipe into a snake bone pipe; The laser cutting equipment comprises a cabinet, wherein a pipe positioning driving part, a laser cutting head and an auxiliary positioning part are arranged in the cabinet, and the pipe positioning driving part can clamp and position the pipe and can drive the pipe to axially reciprocate and horizontally translate and drive the pipe to axially reciprocate and rotate along the circumferential direction, so that the laser cutting head can cut and process the pipe axially and circumferentially; The auxiliary positioning part can be inserted into one end of the pipe after cutting processing in a sliding manner so as to carry out internal supporting positioning on the cutting processing end of the pipe, the auxiliary positioning part comprises an auxiliary positioning state and an inclined unloading state, the supporting outer diameter of the auxiliary positioning part can be expanded and increased in the auxiliary positioning state so that the outer wall of the auxiliary positioning part can be in sliding butt joint with the inner wall of the pipe, and the supporting outer diameter of the auxiliary positioning part can be contracted and reduced in the inclined unloading state so that the outer wall of the auxiliary positioning part is separated from the inner wall of the pipe.
  9. 9. The processing device of the adjustable bend pipe with the expandable self-adaptive snake bone structure of claim 8, wherein the pipe positioning driving part comprises a clamping positioning part, a translation driving part, a rotation driving part and a sliding supporting part, the clamping positioning part can position and clamp the pipe, the translation driving part can drive the clamping positioning part to reciprocate and translate, the rotation driving part can drive the clamping positioning part to reciprocate and rotate, so that the clamping positioning part can drive the pipe to translate and rotate, and the sliding supporting part can carry out sliding supporting limiting on one side of a pipe laser cutting processing position.
  10. 10. The processing device of the adjustable bend catheter with the expandable self-adaptive snake bone structure of claim 8, wherein the auxiliary positioning part comprises an auxiliary positioning rod, an inclined driving part and an inner supporting positioning part, the inner supporting positioning part is arranged on the outer ring of the auxiliary positioning rod, the inner supporting positioning part can be inserted into the inner ring of one end of the pipe which is cut and processed so as to slidably support the inner wall of the pipe, the inclined driving part can drive the auxiliary positioning rod and the inner supporting positioning part to adjust to an inclined unloading state after the pipe is processed into a snake bone pipe, and the supporting diameter of the inner supporting positioning part is reduced at the moment so as to separate the outer wall of the inner supporting positioning part from the inner wall of the snake bone pipe.

Description

Adjustable curved catheter with expandable self-adaptive snake bone structure and processing method thereof Technical Field The invention belongs to the field of sheath pipes, and particularly relates to an adjustable bending catheter with an expandable self-adaptive snake bone structure and a processing method thereof. Background In heart valve interventions, a serpentine structure is typically used in the construction of an implantable adjustable bend catheter, which has the advantage of providing more precise bending and higher radial support strength. However, because the snake bone tube is cut from the whole metal tube, the radial section of the snake bone tube still has high rigidity when being bent, so that the abnormal bracket or other implantation devices can have the risk of blocking when passing through. In order to optimize the trafficability of the snake bone catheter, the invention designs the catheter with the expandable self-adaptive snake bone structure, which has a certain degree of self-adaptive flexibility on the radial structure of the snake bone part. Disclosure of Invention Aiming at the problems in the related art, the invention provides an adjustable bending catheter with an expandable self-adaptive snake bone structure and a processing method thereof, so as to overcome the technical problems in the prior art. In order to solve the technical problems, the invention is realized by the following technical scheme: The invention relates to an adjustable bending catheter with an expandable self-adaptive snake bone structure, which comprises an inner tube, a snake bone tube and an outer protection tube which are sequentially arranged from inside to outside, wherein one side of the snake bone tube is provided with a plurality of bending grooves which are distributed along the axial direction, the other side of the snake bone tube is provided with a plurality of bending expansion joints which are distributed along the axial direction, the snake bone tube can be bent towards one side of the bending grooves, and the gap of the bending expansion joint can be expanded when the snake bone tube is bent; the snake bone tube is also provided with a radial expansion joint, the radial expansion joint can be divided on the snake bone tube to form a radial expansion part, and the radial expansion part can be expanded and deformed outwards when being subjected to an outward supporting force so as to increase the passing inner diameter of the snake bone tube. Preferably, the bending grooves and the bending expansion joints are sequentially staggered along the axial direction of the snake bone tube. Preferably, the plurality of bending expansion joints are arranged on one side of the snake bone pipe opposite to the bending groove so as to divide the back surface of the bending groove into a plurality of radial expansion parts. Preferably, the plurality of bending expansion joints are respectively arranged at two sides of the bending groove along the axial distribution of the snake bone shaft so as to divide and form a plurality of radial expansion parts at two sides of the bending groove. The invention also discloses a processing method of the adjustable bending catheter with the expandable self-adaptive snake bone structure, which comprises the following specific steps: preparing an inner tube and an outer protective tube by extrusion molding; Pushing and conveying the pipe material into a laser cutting device through a pipe material pushing and conveying device, and cutting and processing the pipe material into a snake bone pipe through the laser cutting device; Penetrating the inner pipe into the snake bone pipe, sleeving an outer protection pipe outside the snake bone pipe, and preliminarily forming a composite pipeline structure; the composite pipeline structure is heated by the heating equipment, the outer protective tube is heated and contracted to generate uniform radial pressure, the outer protective tube is clung to the surface of the snake bone tube, meanwhile, the inner tube is softened and expanded by heat, the inner tube is clung to the inner wall of the snake bone tube and is partially embedded into a cutting seam on the snake bone tube, so that tight mechanical interlocking is formed, and the inner tube, the snake bone tube and the outer protective tube are assembled to form an adjustable bent catheter. Preferably, when the snake bone tube is cut, pushing and conveying the tube into the cabinet through the tube pushing and conveying equipment; The pipe positioning driving part in the cabinet clamps and positions the pipe, drives the pipe to axially reciprocate and translate and drive the pipe to axially reciprocate and rotate along the circumferential direction, so that the laser cutting head can cut and process the pipe in the axial direction and the circumferential direction, and bending grooves, bending expansion joints and radial expansion joints are gradually cut and processed on the