CN112494785A

CN112494785A - Balloon catheter with novel structure

Info

Publication number: CN112494785A
Application number: CN202011392368.9A
Authority: CN
Inventors: 龙俊; 张志军; 黄君仪; 李斌
Original assignee: Brosmed Medical Co ltd
Current assignee: Brosmed Medical Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-03-16

Abstract

The invention discloses a balloon catheter with a novel structure, which comprises a Ruhr joint, a catheter proximal end tube body, a balloon distal end tube body, a balloon proximal end shoulder, a balloon intermediate, a balloon distal end shoulder and a tip, wherein the Ruhr joint, the catheter proximal end tube body, the balloon distal end tube body, the balloon proximal end shoulder, the balloon intermediate, the balloon distal end shoulder and the tip are sequentially connected from a; the balloon proximal end shoulder, the balloon intermediate and the balloon distal end shoulder form a balloon; the saccule is provided with an inner cavity, and a guide wire extends into the inner cavity and props against the tip end; wherein: the balloon proximal shoulder and the balloon distal shoulder are provided with at least one invaginated folding edge. The length of the conical part of the shoulder part is reduced by the shoulder part of the balloon, so that the shoulder part of the balloon is expanded less when the balloon is inflated, and the damage of the shoulder part of the balloon to surrounding normal blood vessels can be reduced.

Description

Balloon catheter with novel structure

Technical Field

The invention relates to the technical field of medical instruments, in particular to a balloon catheter with a novel structure.

Background

Interventional therapy (Interventional treatment) is an emerging therapeutic approach between surgical and medical treatments, including both intravascular and non-vascular interventions. In brief, the interventional therapy is a minimally invasive treatment method for treating the local focus under the guidance of an imaging equipment angiography machine, a fluoroscopy machine, a CT, an MR and a B-ultrasound by making a micro channel with the diameter of several millimeters on a blood vessel and the skin or through an original pipeline of a human body under the condition of exposing the focus without operation.

Currently, the main structure of the balloon used in the interventional operation is: a balloon distal shoulder, a balloon intermediate, a balloon proximal shoulder; the balloon catheter has the defects that the outer diameter is larger after the proximal shoulder and the distal shoulder of the balloon are folded and the balloon is decompressed, so that the balloon catheter is difficult to push and withdraw, and meanwhile, the proximal shoulder and the distal shoulder of the balloon can be excessively expanded when being pressurized, so that normal blood vessels are damaged.

Therefore, a balloon with a novel structure is needed to overcome the problems of difficult pushing, withdrawing, secondary pushing and withdrawing caused by the folding of the distal shoulder and the tip of the balloon and the outer diameter of the balloon after the pressure relief of the balloon in the traditional balloon catheter is too large, and the problem of damage to normal blood vessels caused by the excessive expansion of the shoulder of the balloon, and can be used for Proximal Optimization (POT) operation. And the basic structure and the using method of the common balloon catheter are kept, and clinical complications are reduced.

Disclosure of Invention

The invention aims to solve the technical problem of providing a balloon catheter with a novel structure aiming at the defects of the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a balloon catheter with a novel structure comprises a Ruhr joint, a catheter proximal end tube body, a balloon distal end tube body, a balloon proximal end shoulder, a balloon intermediate, a balloon distal end shoulder and a tip which are sequentially connected from a proximal end to a distal end; the balloon proximal end shoulder, the balloon intermediate and the balloon distal end shoulder form a balloon; the saccule is provided with an inner cavity, and a guide wire extends into the inner cavity and props against the tip end; wherein: the balloon proximal shoulder and the balloon distal shoulder are provided with at least one invaginated folding edge.

In the above technical solution, the retraction is an axial retraction along the balloon.

In the above technical solution, the retraction is a radial retraction along the balloon.

In the technical scheme, the folding edge is a folding line and forms a folding angle.

In the above technical scheme, the break angle is an acute angle or an obtuse angle.

In the technical scheme, the folding edge is an arc line and forms an arc angle.

In the technical scheme, the surfaces of the catheter distal end tube body, the balloon proximal end shoulder, the balloon intermediate, the balloon distal end shoulder and the tip are coated with hydrophilic coatings.

In the technical scheme, the inner cavity surface of the balloon is coated with a hydrophobic coating.

In the technical scheme, the shoulder part at the near end of the balloon and the tube body at the far end of the catheter are in smooth transition through laser welding; the shoulder at the far end of the balloon and the tip are smoothly transited by laser welding.

In the technical scheme, the inner cavity of the balloon is attached with a platinum-iridium marking ring.

The invention has the beneficial effects that:

firstly, the structure of the shoulders at two ends of the traditional balloon is changed, the proximal shoulder and the distal shoulder of the balloon are changed into the structure at least provided with one inward-contracted folded edge, the length of the conical part of the shoulder is reduced by the balloon shoulder of the structure, so that the balloon shoulder is expanded lower when the balloon is pressurized, the damage of the balloon shoulder to the surrounding normal blood vessels can be reduced, and particularly, the Proximal Optimization (POT) operation is carried out.

Secondly, the shoulder part of the balloon with the structure enables the balloon to be wrapped more tightly after being folded, the diameter of the folded balloon is reduced, and the outer diameter of the balloon is smaller after pressure relief, so that the resistance of the balloon catheter in advancing and withdrawing of blood vessels is reduced, and the balloon can reach lesions and be withdrawn from a human body more favorably.

Drawings

Fig. 1 is a schematic view of a balloon and its shoulder in the prior art.

Fig. 2 is a schematic structural view of embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification 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 specification. 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. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

As shown in fig. 2-3, a balloon catheter with a novel structure comprises a luer connector 7, a catheter proximal tube body 6, a balloon distal tube body 5, a balloon proximal shoulder 4, a balloon intermediate 3, a balloon distal shoulder 2 and a tip 1 which are sequentially connected from a proximal end to a distal end; the balloon proximal end shoulder 4, the balloon intermediate 3 and the balloon distal end shoulder 2 form a balloon; the saccule is provided with an inner cavity, and a guide wire extends into the inner cavity and props against the tip end 1; wherein: the balloon proximal shoulder 4 and the balloon distal shoulder 2 have at least one inwardly-tapered folded edge 8.

In this embodiment, the surfaces of the catheter distal tube 5, balloon proximal shoulder 4, balloon intermediate 3, balloon distal shoulder 2 and tip 1 are coated with a hydrophilic coating. The inner lumen surface of the balloon is coated with a hydrophobic coating. The balloon proximal end shoulder 4 and the catheter distal end tube body 5 are in smooth transition through laser welding; the balloon distal shoulder 2 and the tip 1 are smoothly transited by laser welding. The inner cavity of the balloon is attached with a platinum iridium mark ring.

In example 1 shown in fig. 2, the balloon is in an expanded state and has a concave folded edge, and the concave folded edge is a concave folded edge which is contracted along the axial direction of the balloon. The folding edge 8 is a folding line and forms a folding angle, and the folding angle is an acute angle. The balloon proximal end shoulder 4 and the balloon distal end shoulder 2 are of an 'inner conical' structure, and the 'inner conical' structure is small in inner caliber and large in outer caliber.

In example 2 shown in fig. 3, the balloon is in an expanded state and has a concave folded edge, and the concave folded edge is a concave folded edge which is contracted along the radial direction of the balloon. The break angle is an obtuse angle. The balloon proximal shoulder 4 and the balloon distal shoulder 2 are in a "flare" configuration having an inner, outer conical structural portion and an outer, cylindrical structural portion.

In some of these embodiments, the fold 8 is arcuate and forms an arc angle.

In some embodiments, the balloon proximal shoulder 4, the balloon intermediate 3 and the balloon distal shoulder 2 are preferably made of Pebax series, nylon materials or co-extruded or blended with both.

The above examples are intended to illustrate rather than to limit the invention, and all equivalent changes and modifications made by the methods described in the claims of the present invention are intended to be included within the scope of the present invention.

Claims

1. A balloon catheter with a novel structure comprises a Ruhr joint (7), a catheter proximal end tube body (6), a balloon distal end tube body (5), a balloon proximal end shoulder (4), a balloon intermediate body (3), a balloon distal end shoulder (2) and a tip (1) which are sequentially connected from a proximal end to a distal end; the balloon proximal end shoulder (4), the balloon intermediate (3) and the balloon distal end shoulder (2) form a balloon; the saccule is provided with an inner cavity, and a guide wire extends into the inner cavity and props against the tip (1); the method is characterized in that: the balloon proximal end shoulder (4) and the balloon distal end shoulder (2) are at least provided with an inward-contracted folding edge (8).

2. The balloon catheter of claim 1, wherein: the retraction is an axial retraction of the balloon.

3. The balloon catheter of claim 1, wherein: the retraction is a radial retraction of the balloon.

4. The balloon catheter of claim 1, wherein: the folding edge (8) is a folding line and forms a folding angle.

5. The balloon catheter of claim 4, wherein: the folding angle is an acute angle or an obtuse angle.

6. The balloon catheter of claim 1, wherein: the folding edge (8) is an arc line and forms an arc angle.

7. The balloon catheter of claim 1, wherein: the surfaces of the catheter distal end tube body (5), the balloon proximal end shoulder (4), the balloon intermediate body (3), the balloon distal end shoulder (2) and the tip (1) are coated with hydrophilic coatings.

8. The balloon catheter of claim 1, wherein: the inner lumen surface of the balloon is coated with a hydrophobic coating.

9. The balloon catheter of claim 1, wherein: the balloon proximal end shoulder (4) and the catheter distal end tube body (5) are in smooth transition through laser welding; the balloon distal end shoulder (2) and the tip (1) are smoothly transited through laser welding.

10. The balloon catheter of claim 1, wherein: the inner cavity of the balloon is attached with a platinum iridium mark ring.