CN211132631U - Balloon catheter - Google Patents

Abstract

The utility model provides a balloon catheter which is used for expanding an original blood vessel stent and comprises a balloon component and a drainage component, wherein the balloon component is provided with a pressure cavity; the balloon component has a contraction state and an expansion state, the balloon component can expand an original blood vessel support into a formed blood vessel support from the contraction state to the expansion state, the balloon component comprises a joint section and a gradual expansion section which are connected in sequence, the pressure cavity comprises an expansion cavity and a gradual expansion cavity, the expansion cavity can apply expansion force towards the periphery side to the joint section so that the joint section is jointed to the front section of the inner wall of the formed blood vessel support, the gradual expansion cavity can apply expansion force towards the periphery side to the gradual expansion section so that the gradual expansion section is jointed to the rear section of the inner wall of the formed blood vessel support, and the rear section of the formed blood vessel support is gradually expanded along the direction from front to rear. Therefore, the rear-section gradually-expanding part of the formed blood vessel stent is attached to the blood vessel wall at the outer edge of the coronary artery opening, and the probability of restenosis at the coronary artery opening part is reduced.

Description

Balloon catheter

Technical Field

The utility model belongs to the technical field of intervene medical instrument, especially, relate to a sacculus pipe.

Background

Coronary artery stenosis is usually caused by atherosclerosis, primary stenosis, restenosis after stenting, arteritis, and fibromyo-fibroid dysplasia, and the like, which may occur at the position of the vessel opening, proximal and distal to the opening, and branches, and the lesion vessel may have calcification, distortion, or angulation in different degrees due to the different degrees and angles of the vessel stenosis caused by the condition. To treat this condition, the medical community currently uses Percutaneous Transluminal Coronary Angioplasty (PTCA), which uses a balloon member to open a stenotic lesion in a vessel, and to solve the problem of restenosis at the vascular lesion, one or more vascular stents are often placed at the lesion.

The coronary artery opening is easy to be narrowed in the proximal end area, particularly in the main coronary artery, the blood vessel close to the opening is in a bell mouth shape, the diameter change is large, the diameter change of the blood vessel is gradually slowed down after the blood vessel is far away from the opening, and therefore after the stent is implanted, even if the stent is subjected to post-dilatation, the blood vessel stent close to the opening is likely to have the condition of poor adherence.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sacculus pipe aims at solving among the prior art when the blood vessel of coronary artery opening part is the technical problem of the unable laminating vascular wall of vascular support when horn mouth form.

The utility model discloses a realized like this, a sacculus pipe for expand original vascular support, original vascular support is the tubular structure, sacculus pipe includes sacculus component and drainage component of interconnect, the sacculus component has the pressure chamber, the drainage component has the drainage chamber and sets up the drainage mouth that is used for supplying fluid to enter into in the drainage chamber, the pressure chamber with the drainage chamber is linked together;

the balloon component comprises a joint section and a gradually expanding section which are sequentially connected, the pressure cavity comprises an expansion cavity formed by the surrounding of the joint section and a gradually expanding cavity formed by the surrounding of the gradually expanding section, and the gradually expanding cavity is communicated with the drainage cavity; the balloon component is provided with a contraction state when the pressure cavity is not filled with fluid and an expansion state when the pressure cavity is filled with fluid, the balloon component is inserted into the original blood vessel stent and can expand the original blood vessel stent into a formed blood vessel stent in the process of expanding from the contraction state to the expansion state, the expansion cavity can apply expansion force towards the peripheral side to the attaching section so that the attaching section is attached to the front section of the inner wall of the formed blood vessel stent, and the gradually expanding cavity can apply expansion force towards the peripheral side to the gradually expanding section so that the gradually expanding section is attached to the rear section of the inner wall of the formed blood vessel stent, and the rear section of the formed blood vessel stent is gradually expanded from front to back.

Further, the sacculus pipe still including wear to locate the pressure chamber reaches the guiding tube in drainage chamber, the guiding tube have with the pressure chamber reaches the drainage chamber all keeps apart the setting and with external intercommunication in order to supply the guide chamber that external structure penetrated.

Furthermore, the extending direction of the attaching section and the side surface of the divergent section form an included angle of 5-30 degrees.

Further, the balloon catheter also comprises a tube seat connected to one end of the drainage member far away from the balloon member, and the tube seat is used for allowing the fluid to enter the drainage cavity.

Further, the balloon catheter further comprises a marker ring connected to the guide tube for positioning the balloon member.

Furthermore, the mark ring is provided with three connecting parts which respectively correspond to the attaching section, the divergent section and the attaching section and the divergent section.

Further, the balloon catheter also comprises a spinous process which is convexly arranged on the outer surface of the balloon component.

Further, the spinous process is arranged on the attaching section.

Further, the spinous processes are arranged in a plurality of groups along the circumferential direction of the balloon member, and each group of the spinous processes is arranged in a plurality of groups in parallel with the axial direction of the balloon member or spirally arranged along the axial direction of the balloon member.

Further, the spinous process is cone, pyramid, truncated cone or hemispherical.

The utility model discloses technical effect for prior art is: the utility model discloses a set up the sacculus component into the laminating section and the divergent section that connect gradually, expand original vascular support into shaping vascular support through the pressure chamber, make when the sacculus component is in inflation state, the expansion chamber applys the expanding force towards circumference to the laminating section, and make the anterior segment of pipe wall laminate in the stenosis department of coronary artery blood vessel near-end in the shaping vascular support, the divergent chamber applys the expanding force towards circumference to the divergent section, so that the back end of shaping vascular support sets up along the direction divergent from the front to the back, and make the divergent section laminate in the inner wall of tubaeform divergent blood vessel between the stenosis department of coronary artery blood vessel near-end and the coronary artery opening, the laminating section laminates in the blood vessel inner wall before the divergent section, so as to play the positioning action, prevent that shaping vascular support from sliding, the divergent section has played shaping and supporting role to the divergent section, shaping vascular support just so can the adaptation laminate in the little stenosis department of coronary artery blood vessel near-end and diameter change and the great coronary artery loudspeaker of diameter change department and diameter change The horn mouth is used for avoiding the condition that the blood vessel stent is not well jointed with the coronary artery wall.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a balloon catheter provided in an embodiment of the present invention;

fig. 2 is a perspective view of a balloon catheter provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view B-B of FIG. 2;

fig. 5 is a functional schematic diagram of a balloon catheter provided in an embodiment of the present invention.

Description of reference numerals:

10. a balloon member; 101. a pressure chamber; 102. an expansion lumen; 103. a gradually expanding cavity; 11. a fitting section; 12. A gradual expansion section; 20. a drainage member; 201. a drainage lumen; 21. a distal drainage tube; 22. a proximal end drainage tube; 30. A guide tube; 301. a wire guide opening; 302. a guide chamber; 31. a tip; 32. an inner tube; 33. an outlet end; 40. A tube holder; 50. a marker ring; 60. a spinous process; 70. forming the blood vessel stent; 71. a fitting section; 72. divergent section

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "front", "back", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 5, an embodiment of the present invention provides a balloon catheter for expanding an original stent into a formed stent 70, wherein the original stent is a tubular structure, and the formed stent 70 includes a fitting section 71 having a uniform inner diameter and located at a front section thereof, and a diverging section 72 located at a rear section thereof, connected to a rearward extending end of the fitting section 71, and diverging radially along an extending direction of the fitting section 71.

Referring to fig. 1 to 5, the balloon catheter includes a balloon member 10, a drainage member 20, a guide tube 30, a tube seat 40, a spinous process 60, and a marker ring 50.

Referring to fig. 1 to 2, the balloon member 10 has a pressure chamber 101, the drainage member 20 has a drainage chamber 201 and is opened with a drainage port for fluid to enter the drainage chamber 201, the tube seat 40 is disposed at the drainage port so as to connect an external power component for providing fluid and for fluid to enter the drainage chamber 201, the pressure chamber 101 is communicated with the drainage chamber 201, and the external power component can charge or discharge pressure to the pressure chamber 101 by inputting or extracting fluid to or from the drainage chamber 201. The fluid may be a gas, and in the embodiment of the present invention, the fluid is a liquid.

Referring to fig. 2, the balloon member 10 includes a fitting section 11 and a diverging section 12 connected in sequence, the diverging section 12 is connected to the drainage member 20, the pressure chamber 101 includes an expansion chamber 102 surrounded by the fitting section 11 and a diverging chamber 103 surrounded by the diverging section 12, and the diverging chamber 103 is communicated with the drainage chamber 201; the balloon member 10 is inserted into the original stent and has a contracted state when the pressure chamber 101 is not filled with fluid and an expanded state when the pressure chamber 101 is filled with fluid, the fitting section 11 and the diverging section 12 both fit to the inner circumferential surface of the original stent in the contracted state, the expanding chamber 102 can apply an expanding force toward the circumferential side to the fitting section 11 so that the fitting section 11 fits to the inner wall of the fitting section 71, and the diverging chamber 103 can apply an expanding force toward the circumferential side to the diverging section 12 so that the diverging section 12 fits to the inner wall of the diverging section 72, and the diverging section 72 is arranged in a diverging manner in the front-to-back direction.

Preferably, the balloon member 10 has a cylindrical shape in the attached section 11 in the inflated state, and the proximal end of the divergent section 12 has a longer diameter than the distal end thereof, so that the divergent section 12 forms a circular truncated cone-shaped structure, and the divergent section 12 bulges outward to a greater width to form the attached section 71 and the divergent section 72 when the original stent is expanded to the formed stent 70 in the process of the balloon member 10 being inflated from the deflated state to the inflated state.

More preferably, the balloon member 10 is made of a polymer material, which is a mixture of one or more of silicone rubber, polyurethane, polytetrafluoroethylene, polyethylene, polypropylene, polyvinyl chloride, and polycarbonate.

Referring to fig. 1 to 2, when the extending direction of the fitting section 71 forms an angle of 5 ° to 30 ° with the extending direction of the diverging section 72, the diverging section 72 is fitted to the blood vessel wall at the coronary flare, so that the extending direction of the fitting section 11 forms an angle of 5 ° to 30 ° with the extending direction of the diverging section 12 in the expanded state, so as to fit the blood vessel wall at the coronary flare.

The utility model sets the balloon component 10 as the joint section 11 and the divergent section 12 which are connected in sequence, when the balloon component 10 is in the expansion state, the pressure cavity 101 applies circumferential expansion force to the joint section 11 and the divergent section 12 at the same time, the joint section 11 expands the far end of the original blood vessel stent into the joint section 71 with small inner diameter change through the expansion force applied by the pressure cavity 101, and the joint section 71 is jointed at the narrow part of the near end of the coronary vessel, the divergent section 12 expands the near end of the original blood vessel stent into the divergent section 72 with the near end protruding outwards relative to the far end through the expansion force applied by the pressure cavity 101, and the divergent section 72 is jointed at the inner wall of the trumpet-shaped divergent vessel between the narrow part of the near end of the coronary vessel and the coronary vessel opening after the joint section 71 is jointed at the inner wall of the diseased vessel, the joint section 71 is jointed at the inner wall of the vessel before the divergent section 72, so as to play the positioning role, the formed blood vessel support 70 is prevented from sliding, and the gradually expanding section 12 plays a role in forming and supporting the gradually expanding section 72, so that the formed blood vessel support 70 can be matched and attached to the narrow part with small diameter change and the flare opening of the coronary artery with large diameter change at the near end of the coronary artery, and the condition that the blood vessel support is not well attached to the wall of the coronary artery is avoided.

Referring to fig. 2 to 5, the guide tube 30 sequentially penetrates through the drainage lumen 201 and the pressure lumen 101 and is connected to the balloon member 10, the guide tube 30 includes a tip 31 protruding from the balloon member 10, an inner tube 32 located in the pressure lumen 101, and an outlet end 33 located in the drainage lumen 201, the guide tube 30 has a guide lumen 302 isolated from the pressure lumen 101 and the drainage lumen 201 and communicating with the outside for the movement of the guide wire, and a guide wire port 301 opened in the distal drainage tube 21 and communicating with the guide lumen 302 for the guide wire to enter and exit from the guide lumen 302, and the guide lumen 302 provides a lumen path for the guide wire. Wherein the inner tube 32 is spaced from the wall of the pressure lumen 101 to enable sufficient inflation of the balloon member 10. The tip 31 is used for providing guidance for the balloon member 10 to enter a lesion area, the guide cavity 302 is used for inserting a guide wire, and the balloon member 10 is matched with the structural shape of the guide wire after the guide wire enters the guide cavity 302 so as to guide the balloon member 10 to reach a target area quickly.

In the embodiment of the present invention, the balloon member 10 is far, the tube seat 40 is near, preferably, the balloon member 10 further includes a far end transition section connected to the fitting section 11 and a near end transition section connected to the near end of the diverging section 12, the far end transition section is used to connect the fitting section 11 to the tip 31 of the guiding tube 30, and the near end transition section is used to connect the diverging section 12 to the drainage member 20.

Referring to fig. 1, in the embodiment of the present invention, the drainage member 20 includes a distal drainage tube 21 connected to the balloon member 10 and a proximal drainage tube 22 connected to the tube seat 40, the outlet end 33 of the guiding tube 30 is connected to the distal drainage tube 21, the distal drainage tube 21 is used for providing support for the balloon member 10, and the proximal drainage tube 22 is used for pushing the distal drainage tube 21 so that the balloon member 10 reaches the target area.

Referring to fig. 2 and 5, the marker ring 50 is connected to the guide tube 30 and is used to position the balloon member 10, and after the balloon member 10 is introduced into a human body, the position of the marker ring 50 can be observed by X-ray, so as to determine the position of the balloon member 10, thereby facilitating the adjustment of the balloon member 10 by a user. Preferably, the marker ring 50 is preferably a platinum ring.

Referring to fig. 2 and 5, preferably, the marker ring 50 is provided with three and respectively corresponding to the fitting section 11, the diverging section 12 and the connection between the fitting section 11 and the diverging section 12, so that the positions of the fitting section 71 and the diverging section 72 in the formed vascular stent 70 can be determined. Preferably, the marker ring 50 corresponding to the conformable segment 11 faces the distal end of the conformable segment 11 and the marker ring 50 corresponding to the diverging segment 12 faces the proximal end of the diverging segment 12 to facilitate viewing of the specific location of the balloon member 10.

Referring to fig. 1, 2, 4 and 5, in the embodiment of the present invention, the spinous process 60 is protruded on the outer surface of the balloon member 10, and the spinous process 60 increases the contact area and the static friction force between the balloon member 10 and the vessel wall, so that the balloon member 10 can be anchored in the blood vessel in the expanded state to prevent the formed stent 70 from slipping and shifting.

Referring to fig. 1 to 2, preferably, the spinous process 60 is disposed on the attaching section 11, so that the processing of the spinous process 60 is saved and the anchoring effect is achieved.

Referring to fig. 4, preferably, the spinous process 60 and the balloon member 10 are integrally formed through a stretch blow molding process, and the spinous process 60 has an inner cavity communicating with the pressure chamber 101 to contract or expand simultaneously with the balloon member 10.

In the embodiment of the present invention, the spinous processes 60 are circumferentially disposed along the balloon member 10, and each group of spinous processes 60 is disposed in parallel to the axial direction of the balloon member 10 or spirally disposed along the axial direction of the balloon member 10 to enhance the anchoring effect of the spinous processes 60. The multiple spinous processes 60 of each group may be connected in series or may be spaced apart. Optionally, the spinous processes 60 are arranged in 3, 4, or 6 groups equally spaced circumferentially along the balloon member 10. Wherein the height of the spinous process 60 is 0.5-1mm, the axial distribution length of the spinous process 60 is 3-18mm, and the interval between the axially adjacent spinous processes 60 is 1-2 mm. Optionally, the spinous process 60 is cone, pyramid, truncated cone, or hemispherical to increase the contact area and friction between the spinous process 60 and the vessel wall and to facilitate processing.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A balloon catheter is used for expanding an original blood vessel stent which is of a tubular structure, and is characterized by comprising a balloon component and a drainage component which are connected with each other, wherein the balloon component is provided with a pressure cavity, the drainage component is provided with a drainage cavity and a drainage port for allowing fluid to enter the drainage cavity, and the pressure cavity is communicated with the drainage cavity;

the balloon component comprises a joint section and a gradually expanding section which are sequentially connected, the pressure cavity comprises an expansion cavity formed by the surrounding of the joint section and a gradually expanding cavity formed by the surrounding of the gradually expanding section, and the gradually expanding cavity is communicated with the drainage cavity; the balloon component is provided with a contraction state when the pressure cavity is not filled with fluid and an expansion state when the pressure cavity is filled with fluid, the balloon component is inserted into the original blood vessel stent and can expand the original blood vessel stent into a formed blood vessel stent in the process of expanding from the contraction state to the expansion state, the expansion cavity can apply expansion force towards the peripheral side to the attaching section so that the attaching section is attached to the front section of the inner wall of the formed blood vessel stent, and the gradually expanding cavity can apply expansion force towards the peripheral side to the gradually expanding section so that the gradually expanding section is attached to the rear section of the inner wall of the formed blood vessel stent, and the rear section of the formed blood vessel stent is gradually expanded from front to back.

2. The balloon catheter according to claim 1, further comprising a guide tube inserted into the pressure chamber and the drainage chamber, wherein the guide tube has a guide chamber isolated from both the pressure chamber and the drainage chamber and communicating with the outside for an external structural member to penetrate.

3. The balloon catheter of claim 1, wherein the direction of extension of the conformable segment is angled 5 ° to 30 ° from the edge of the diverging segment.

4. The balloon catheter of claim 1, further comprising a hub connected to an end of the drainage member distal to the balloon member, the hub adapted to allow the fluid to enter the drainage lumen.

5. A balloon catheter according to claim 2, further comprising a marker ring connected to the guide tube for positioning the balloon member.

6. The balloon catheter according to claim 5, wherein the marker ring is provided with three and respectively corresponding to the fitting section, the divergent section and the connection of the fitting section and the divergent section.

7. The balloon catheter of any one of claims 1-6, further comprising a spinous process protruding from an outer surface of the balloon member.

8. The balloon catheter of claim 7, wherein said spinous process is disposed on said attachment section.

9. The balloon catheter according to claim 7, wherein the plurality of the spinous processes are provided in plural sets along a circumferential direction of the balloon member, and each set of the spinous processes is provided in plural numbers in a spiral manner in parallel with or along an axial direction of the balloon member.

10. The balloon catheter of claim 9, wherein said spinous process is conical, pyramidal, multi-faceted, frustoconical, or hemispherical.

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