CN216535653U - Cavity support - Google Patents

Abstract

The utility model discloses a cavity support which is of a tubular structure, wherein the tubular structure is formed by spirally winding metal wires, and two adjacent circles of metal wires are tightly attached to each other; the tubular structure comprises a first tubular body and a second tubular body, the second body is wound outside the first body, and the head and the tail of the second body are connected with the first body. The cavity support has simple structure and strong radial supporting force of the central wrapping and winding, and can be implanted after being compressed or stretched.

Description

Cavity support

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a cavity channel bracket.

Background

Esophageal cancer, prostatic hyperplasia and biliary calculi are common lumen obstructive diseases in life, and when open surgery is adopted in clinical treatment, the operation difficulty is high, and some problems which are difficult to solve are existed, such as many complications, high risk, high recurrence rate and the like. The orifice stent is a medical device commonly used in the above-mentioned surgery, and has various shapes, among which a tubular shape is the most common.

There are two categories of stent deployment: the first is a balloon-expandable stent, which is fixed in the body lumen by balloon expansion when implanted, to exert the functions of supporting and smoothing the lumen. The disadvantage is that over time the stent lacks expansion flexibility, the inner diameter of the stent gradually becomes smaller and eventually collapses due to the natural elastic recoil of the luminal tissue, resulting in restenosis. The second is self-expanding type stent, which is mainly woven by super-elastic metal or memory metal, and is implanted into the designated orifice position by compressing or binding in the implanting device, and self-expanding can be carried out by removing the compression force to support and expand in the orifice.

At present, in a human body non-vascular lumen stent, a self-expansion stent is applied mostly, and the self-expansion stent has various design forms, and is generally set to be in the shapes of a spiral cylinder, a coil, a stepped tube, a high-order coil, a weave, a grid and the like. The above designs all have certain functional defects, for example, the helical stent is difficult to compress for implantation, the stent is easy to deviate when the filaments are adopted for weaving, although some products at present adopt sawteeth for lifting the helix, the radial supporting force is not strong, the defect of secondary stenosis is easy to cause, the weaving type has the defects of complex weaving process, low production efficiency, insufficient radial force of the product, possible occurrence of secondary stenosis of the cavity channel, difficult recovery and the like.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem of providing a cavity support which has simple structure and strong radial supporting force, can be implanted after being compressed or stretched, and avoids the defects of the prior common products.

In order to solve the technical problems, the utility model adopts a technical scheme that: providing a cavity support, wherein the cavity support is of a tubular structure, the tubular structure is formed by spirally winding metal wires, and two adjacent circles of the metal wires are tightly attached to each other; the tubular structure comprises a tubular first main body and a tubular second main body, the second main body is wound outside the first main body, and the head and the tail of the second main body are connected with the first main body.

The first main body and the second main body are formed by one metal wire spiral, the metal wire spiral bends to the opposite side after reaching a circle of the farthest end of the first main body, the second main body is formed by the first main body in a spiral mode, and the metal wires are connected end to end.

The first main body and the second main body are respectively formed by different metal wire spirals, and the head and the tail of the second main body are respectively connected with the head and the tail of the first main body.

The first main body and the second main body are symmetrically distributed along the central line of the cavity support, and the included angle between the first main body and the second main body ranges from 30 degrees to 90 degrees.

The diameters of the metal wires of the first main body and the second main body are consistent, and the pitch between every two adjacent circles of the metal wires is equal to the diameter of the metal wires.

Wherein the diameter of the metal wire is any value between 0.2 and 0.4 mm.

Wherein, the outer wall of the metal wire is provided with a coating film.

Wherein, the material of tectorial membrane is medical silica gel or TPU.

Wherein the length interval of the cavity channel bracket is 4-10 cm.

Wherein, the metal wire is made of nickel-titanium alloy.

Compared with the prior art, the cavity support has the beneficial effects that: simple structure, strong radial supporting force of central wrapping and winding, and can be implanted after being compressed or stretched.

Drawings

To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic plan view of the channel stent of the present invention;

FIG. 2 is a schematic perspective view of the channel stent of the present invention.

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.

All directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 and 2, fig. 1 is a plan view of the lumen stent of the present invention, and fig. 2 is a schematic perspective view of the lumen stent. The cavity support is provided with a tubular structure 1, the tubular structure 1 is formed by spirally winding metal wires, and two adjacent circles of metal wires are tightly attached. The tubular structure 1 comprises a tubular first body 11 and a tubular second body 12, wherein the second body 12 is wound outside the first body 11, and the head and the tail of the second body 12 are connected with the first body 11. Compare the medical chamber of weaving formation that uses usually and say the support, the chamber of this application says that the support is the wire spiral and forms, and the shape is similar with the spring, closely laminates seamless between the adjacent wire, and the structure is simpler relatively, easier production preparation, and efficiency is higher, and the radial holding power of gapless spring structure is stronger simultaneously, prevents to implant back aversion and restenosis. In addition, the tubular structure 1 is formed by winding the second main body 12 outside the first main body 11, and the middle part of the tubular structure 1 is formed by a two-layer spiral structure, so that the radial supporting force is further enhanced. The head and the tail of the second main body 12 are fixed on the first main body 11, so that the end part is prevented from damaging the human body.

First main part 11 and second main part 12 in this application can set up to two independent siphonozooids, also can set up to a continuous winding of wire and form, and wherein first main part 11 and second main part 12 in the first embodiment are formed by a wire spiral, and the wire spiral is buckled to the contralateral to the turn of first main part 11 distal most, forms second main part 12 along the outside spiral of first main part 11, and the wire end to end. Specifically, for example, if a length of 10cm of the orifice bracket is required, a wire is first helically wound in one direction until the end-to-end distance meets the requirement, so as to form a first body 11, then the wire is helically wound to the center line, then the wire is bent toward the opposite side, and is wound around the outer surface of the first body 11 until the initial end of the first body 11 is wound, the end of the wire is connected with the head, so as to form a second body 12, and finally the end of the wire is fixed with the head into a whole, which may be generally bonded or welded.

The first body 11 and the second body 12 in the second embodiment are respectively formed by different metal wires in a spiral manner, the first body 11 and the second body 12 are independently formed, the second body 12 is sleeved outside the first body 11, and the head and the tail of the second body 12 are respectively connected with the head and the tail of the first body 11, so that the first body 11 and the tail are combined into a whole. Since the process is relatively complicated compared to the first embodiment, the first embodiment is taken as an example for explanation in the present application.

In the present application, the first main body 11 and the second main body 12 are symmetrically distributed about a central line of the lumen stent, and an included angle between the first main body 11 and the second main body 12 is 30 degrees to 90 degrees. The deviation angle interval between the first main body 11 and the second main body 12 is usually set to be 45-75 degrees by taking a horizontal plane as a reference, the included angle between the first main body and the second main body is 30-90 degrees, the rigidity of the memory metal wire in the angle interval range is low, the memory metal wire is easy to compress, the woven deviation angle is also favorable for compression, and the memory metal wire is convenient to implant into a human body.

The diameter of the wire of first main part 11 in this application and second main part 12 is unanimous to simplify overall structure, make holistic uniformity better, the pitch between adjacent two rings of wires equals with the diameter of wire, makes and closely laminates between the wire.

The diameter of the metal wire in the application is any numerical value between 0.2mm and 0.4mm, the metal wire is implanted into a human body at different positions, and the diameter and the length of the medical cavity support are different, so that the metal wire with a proper diameter can be selected for weaving, for example, when the required length of the medical cavity support is shorter, the metal wire with a smaller diameter can be selected for better production and manufacturing.

The outer wall of the metal wire is provided with the coating film, preferably, the coating film is made of medical silica gel or Thermoplastic Polyurethane (TPU) elastomer rubber, has the characteristics of high strength, good toughness, wear resistance, water resistance, aging resistance and the like, is wrapped outside the metal wire, reduces foreign body sensation after implantation, and eliminates potential damage to a human body caused by a thread end possibly formed in the metal wire weaving process.

The length interval of the cavity channel bracket in the application is 4-10cm, and the proper diameter and length are adopted according to different application parts, so that the cavity channel bracket can be conveniently implanted to any part of a human body.

The metal wire is made of nickel-titanium alloy, the nickel-titanium alloy is shape memory alloy, the shape memory alloy can automatically restore the self plastic deformation to the original shape at a certain specific temperature, and the metal wire has good plasticity. The metal wire 1 needs to be stretched when being used and taken out from a human body, and the nickel-titanium alloy can enable the metal wire to be automatically restored to the original shape after being stretched, so that the use effect is prevented from being influenced by deformation.

The medical cavity support comprises the following process steps of firstly winding a superelasticity or shape memory metal wire with the diameter of 0.2-0.4mm around a specially designed tool, and winding the superelasticity or shape memory metal wire: the method comprises the steps of winding a metal wire in a spring mode from the lower end to the upper end along one side in a direction of 45-75 degrees with the horizontal direction of a tool, wherein the thread pitch is the diameter of the metal wire, the winding height is 4-10cm, the winding height is selected according to the application of a support, after the metal wire is wound to a specified height, the first cross point at the upper end is selected according to a deviation angle to change the direction, the metal wire penetrates through a change point to the other side to be wound from the upper end to the lower end, and the metal wire is wound to the lower end to be bonded or welded with an initial head at the last cross point. The non-crossed winding parts at the two ends of the cavity channel bracket can be expanded with proper inner diameter so as to prevent the bracket from shifting after being implanted. And (4) carrying out heat treatment setting at high temperature after the steps are finished.

And then, laminating, namely stretching the lumen stent to a certain degree in a laminating mode, laminating the metal wire, wherein the laminating material is medical silica gel or TPU material, the thickness of the laminating is 0.05-0.1 mm, and the laminating method is dipping or spraying. If the film covering material is medical liquid silica gel, a dipping method is adopted, and crosslinking drying is carried out at the temperature of 100-200 ℃ after dipping is finished; and if the solution is the TPU solution, drying in a fume hood at normal temperature after dipping.

The cavity channel bracket is simple in preparation process, higher in production efficiency and effectively reduced in cost; the center is wrapped and wound, so that the radial supporting force is effectively increased; the filaments are crossed to form a spiral structure by winding, so that the problem that the common spiral structure is easy to deviate is solved; can be compressed or stretched, and is easy to implant and recover; the stent is covered with a film, so that foreign body sensation after implantation is reduced; and the wire ends are welded, so that possible damage caused by the wire ends is reduced.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The cavity support is characterized by having a tubular structure, wherein the tubular structure is formed by spirally winding metal wires, and two adjacent circles of the metal wires are tightly attached to each other; the tubular structure comprises a tubular first main body and a tubular second main body, the second main body is wound outside the first main body, and the head and the tail of the second main body are connected with the first main body.

2. The orifice bracket of claim 1, wherein the first body and the second body are formed by a single spiral of the wire that is twisted to a distal-most turn of the first body and then bent to the opposite side, the second body being formed by a spiral that extends along the exterior of the first body, the wire being connected end to end.

3. The luminal stent of claim 1 wherein said first body and said second body are each spiraled from a different said wire, said second body being joined end to end with said first body, respectively.

4. The channel support according to any one of claims 1-3, wherein the first body and the second body are symmetrically distributed about a center line of the channel support, and an included angle between the first body and the second body ranges from 30 degrees to 90 degrees.

5. The luminal stent of claim 4 wherein the diameter of the wires of the first and second bodies are the same and the pitch between two adjacent turns of the wires is the same as the diameter of the wires.

6. The luminal stent of claim 5 wherein the diameter of the wire is any value between 0.2 and 0.4 mm.

7. The luminal stent as defined in claim 1 wherein a coating is provided on the outer wall of the wire.

8. The lumen stent of claim 7, wherein the material of the covering membrane is medical silica gel or TPU.

9. The luminal stent of claim 1 wherein the length of the luminal stent is in the interval of 4-10 cm.

10. The orifice bracket of claim 1, wherein the wire is a nickel-titanium alloy.

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