CN210331338U

CN210331338U - Balloon dilatation catheter

Info

Publication number: CN210331338U
Application number: CN201920798181.5U
Authority: CN
Inventors: 戴伟; 夏晓群
Original assignee: Shenzhen Maiketian Life Science Co ltd
Current assignee: Shenzhen Maiketian Life Science Co ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-04-17
Anticipated expiration: 2029-05-29

Abstract

The application relates to a balloon dilatation catheter, which comprises a hollow balloon, a catheter communicated with the inner cavity of the balloon and a channel tube. One side of the inner cavity of the balloon is communicated with the catheter, and the other side of the inner cavity of the balloon is hermetically connected with the channel tube. An opening is formed in the outer wall of the catheter, and one end, far away from the balloon, of the passage tube is connected with the opening in a sealing mode to form a passage from the opening to the outside of the balloon. Still inlay in the passageway and be equipped with the wire guide pipe, the wire guide pipe will the passageway pipe is separated for first passageway and second passageway, the first passageway is used for passing the seal wire, the second passageway forms and runs through the blood circulation route of sacculus inner chamber. The blood flow channel is still left to this application sacculus expansion pipe in-process of sacculus expansion, has avoided the sacculus expansion to vascular jam, can provide the more abundant operating time of sacculus is in order to reach better expansion effect.

Description

Balloon dilatation catheter

Technical Field

The application relates to the field of medical equipment, in particular to a balloon dilatation catheter comprising a blood flow channel.

Background

Cardiovascular diseases have become the first cause of death (> 40%) in China. Reports have shown that people with cardiovascular disease are expected to exceed 1.2 billion, of which about half are with cardiovascular disease. Cardiovascular disease is primarily treated by means of Percutaneous Transluminal Coronary Angioplasty (PTCA) surgery (also known as coronary intervention, PCI). The existing treatment method comprises the steps of fully expanding a diseased blood vessel by using a balloon dilatation catheter, then implanting a stent to support the expanded blood vessel so as to prevent springback, and finally fully expanding the implanted stent by using the balloon dilatation catheter so as to achieve complete adherence. Full expansion of the balloon dilation catheter is important throughout the procedure.

The existing balloon dilatation catheter comprises two cavities, namely a guide wire cavity and a balloon punching cavity. When the balloon is expanded, the blood vessel of the whole lesion area is blocked, and the blood flow at the position is blocked. The long-term blockage of blood flow in blood vessels can cause local myocardial ischemia, which can cause great harm to human bodies and bring about serious side effects. Therefore, the recommended time for balloon expansion in the clinic would be controlled to 30 seconds or less. The short balloon expansion time can cause insufficient expansion of the diseased blood vessels and influence the stent implantation effect.

SUMMERY OF THE UTILITY MODEL

The application provides a balloon dilatation catheter comprising a blood flow channel, which can provide a necessary blood flowing channel in the balloon dilatation process, and further ensure the sufficient expansion of the balloon. The application specifically comprises the following technical scheme:

the utility model provides a sacculus expansion pipe, includes hollow sacculus, intercommunication the pipe of sacculus inner chamber and passageway pipe, the sacculus is including being close to the first end of pipe and keeping away from the second end of pipe, the pipe outer wall is equipped with the opening, passageway pipe one end with opening sealing connection, the other end of passageway pipe passes the sacculus and follows the second end intercommunication to outside the inner chamber, still inlay in the passageway pipe and be equipped with the wire guide pipe, the wire guide pipe is in respectively the opening with second end department with passageway pipe welded fastening, the wire guide pipe will the passageway pipe is separated for first passageway and second passageway, just first passageway with the second passageway all follows the opening part communicates to outside the second end.

And the welding length of the wire guide pipe, the opening and the second end is kept between 0.1 mm and 20 mm.

The outer diameter of the channel pipe is 0.1-10 mm, and the outer diameter of the yarn guide pipe is 0.08-8 mm.

Wherein, the distance between the opening and the first end is 200-400 mm.

Wherein the passage tube extends beyond the second end where the passage tube mates with the second end;

where the passage tube mates with the opening, the passage tube is flush with an outer wall of the catheter.

Wherein, the saccule is prepared by adopting a nylon tube, a polyethylene tube, a polyesteramide tube or a polyurethane tube.

Wherein, the part of the channel tube in the inner cavity is provided with a plurality of developing marks, and the plurality of developing marks are positioned on the outer wall of the channel tube.

The guide wire device comprises a guide wire tube, a channel tube, a connecting piece and a connecting piece, wherein the opening and/or the second end are/is further provided with the connecting piece, the connecting piece is used for welding and fixing the channel tube and the guide wire tube, and the connecting piece is used for positioning the position of the guide wire tube in the channel tube so that a guide wire passes through the center of the channel tube.

Wherein, the connecting piece is including being located the flexible connection spare of opening part, just flexible connection spare's material is nylon tube, polyvinyl chloride, polypropylene, polyethylene pipe, polyesteramide pipe, polyurethane pipe or resin material, also or with the same material preparation of passageway pipe.

Wherein, the connecting piece is including being located the go-between at second end department, the go-between include with silk guide tube complex inner ring, and with the outer loop of passageway pipe complex, the outer loop with still be equipped with a plurality ofly between the inner ring and be used for the intercommunication the second passageway with via hole between the second end outside.

The balloon dilation catheter of the present application communicates through the catheter to the lumen of the balloon so that the outside world can inject pressure through the catheter to dilate the balloon. While a passageway is established between the opposite ends of the balloon by a passageway tube passing through the lumen and communicating respectively between the opening and the second end. Further, the inner cavity of the channel tube is divided into a first channel and a second channel by the guide wire tube fixedly connected with the channel tube, and the first channel and the second channel are communicated from the opening to the outside of the second end. Thereby, the first and second channels may be used for threading a guide wire and allowing blood to pass, respectively. The first channel and the second channel are arranged, so that the phenomenon that the saccule blocks a blood vessel in the expansion process is avoided, and the saccule can be fully expanded by more sufficient operation time. And the wire guide pipe and the channel pipe are fixed by welding, so that the structure is more stable, the processing is easy, and the wire guide pipe has higher economic value.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.

FIG. 1 is a schematic cross-sectional view of a balloon dilation catheter of the present application;

FIG. 2 is a partial schematic view of a balloon dilation catheter of the present application at a second end of the balloon;

FIG. 3 is a schematic partial cross-sectional view of a balloon at a second end of the balloon dilation catheter of the present application;

FIG. 4 is a schematic partial cross-sectional view of the opening of the catheter in the application of the balloon dilation catheter;

FIG. 5 is a schematic partial cross-sectional view at the second end of a balloon of another embodiment of an application balloon dilation catheter;

fig. 6 is a schematic partial cross-sectional view of the opening of a catheter in another embodiment of the application balloon dilation catheter.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

Referring to fig. 1, a balloon dilation catheter 100 of the present application includes a hollow balloon 10, the balloon 10 including an inner lumen 11. The balloon 10 further comprises a first end 101 and a second end 102, wherein the lumen 11 communicates with the catheter 20 at the first end 101. The catheter 20 is in sealing connection with the lumen 10 at the first end 101, and the catheter 20 is used for injecting a liquid into the lumen 11 to expand the lumen 11 and to place a stent. Of course, the lumen 11 is in a contracted state before the balloon dilation catheter 100 reaches the site of the vascular lesion, and there is no need to dilate the non-lesion site. The outer wall of the duct 20 is provided with an opening 21. A passage tube 30 is connected to the opening 21. The passage tube 30 is also connected with the opening 21 in a sealing way, one end of the passage tube 30 far away from the opening 21 passes through the inner cavity 11 and then is connected with the second end 102 in a sealing way, and the interior of the guide tube 30 is opened out of the balloon 10. Thus, one side of the lumen 11 is hermetically connected to the catheter 20, and the other side is hermetically connected to the passage tube 30, so that the lumen 11 becomes a sealed space communicating with one side. The liquid injected from the catheter 20 may transmit the pressure completely to the lumen 11 and cause the balloon 10 to fully inflate. And the opposite ends of the passage tube 30 are connected between the opening 21 and the second end 102 respectively, so that the passage tube 30 penetrates through the inner cavity 11 of the balloon 10, and after the balloon 10 is expanded and deformed and the blood vessel is dilated, the passage tube 30 can form a passage communicated with the opposite ends of the balloon 10. The channel may allow blood flow therethrough such that expansion of the balloon 10 does not cause blood blockage at the lesion site. Therefore, the balloon dilatation catheter 100 of the present application can obtain a more sufficient operation time during the implantation process, and ensure the sufficient dilatation of the balloon 10, thereby ensuring the effect of the surgical treatment.

Further, referring to fig. 2, a guide wire tube 40 is further embedded in the channel tube 30. The guide wire tube 40 is welded to the channel tube 30 at the opening 21 and the second end 102, respectively. The guidewire tube 40 divides the channel tube 30 into a first channel 51 and a second channel 52, and both the first channel 51 and the second channel 52 communicate from the opening 21 out of the second end 102. The inner passage of the guide wire tube 40 may be defined as a first passage 51, and a portion between the outside of the guide wire tube 40 and the inner passage of the passage tube 30 may be defined as a second passage 52. The guidewire tube 40 is set up so that the balloon 10 passes into the guidewire to reach the lesion site of the blood vessel. The internal channel of the channel tube 30 is divided into a first channel 51 and a second channel 52, which can functionally divide the space in the channel tube 30, wherein the first channel 51 is circular and is suitable for passing a guide wire to realize the motion path guidance of the balloon 10 in the blood vessel; the second channel 52 is used to establish a blood flow path to avoid vessel occlusion after the balloon 10 is expanded. After the internal channels of the channel tube 30 are divided, the influence of the guide wire on the blood circulation can be avoided, and a cross-sectional path for the blood circulation can be provided to the maximum extent. Further, the channel tube 30 and the guide wire tube 40 are separately manufactured, and the forming and cost control of the two pipe fittings are facilitated. The channel tube 30 and the wire guide tube 40 are fixedly connected through a welding process, and the relative position between the first channel 51 and the second channel 52 is fixed, so that the first channel 51 and the second channel 52 can respectively perform corresponding functions.

In one embodiment, in order to ensure the reliability of the welded structure, the welding length between the wire guide tube 30 and the opening 21 needs to be maintained between 0.1 mm and 20 mm. Accordingly, the welding length between the wire guide tube 30 and the second end 102 is also kept between 0.1 mm and 20 mm. The welding can adopt a laser welding machine, and is beneficial to accurate control. While the specific weld length needs to be specifically set in conjunction with the outer diameters of the channel tube 30 and the wire guide tube 40.

Correspondingly, after the outer diameter of the balloon 10 and the outer diameter of the catheter 20 are determined, in order to obtain a larger blood flow passage and a larger area through which the guide wire passes, the outer diameter of the passage tube 30 is set to be 0.1-10 mm, and the outer diameter of the guide wire tube 40 is set to be 0.08-8 mm. In one embodiment, the outer diameter of the channel tube 30 is set to 10mm and the outer diameter of the guidewire tube 40 is set to 5mm, i.e., the outer diameter of the first channel 51 is 5mm, and the cross-sectional area of the second channel 52 is determined accordingly.

With respect to the length of the channel tube 30 and the guidewire tube 40, because one end of both the channel tube 30 and the guidewire tube 40 are fixedly attached to the second end 102, the length of both will depend on the length of the balloon 10 and the location of the opening 21. It is desirable to consider the blood flow through the second passageway 52 and also consider the first passageway 51 to be able to engage a guidewire for reliable navigation of the balloon dilation catheter 100 of the present application through a blood vessel. Thus. The opening 21 is preferably disposed between 200 and 400mm from the first end 101. In one embodiment, the opening 21 is 220mm from the first end 101. This length allows the guidewire tube 40 to fit securely over the guidewire and the traction balloon 10 to pass through, while the second channel 52 is short enough not to significantly affect blood flow.

Referring to FIG. 3, where the channel tube 30 mates with the second end 102, both the channel tube 30 and the guidewire tube 40 extend out of the second end 102. After the passage tube 30 and the guidewire tube 40 extend beyond the second end 102, they are directly inserted into the blood vessel without causing blockage of the first passage 51 or the second passage 52 due to the internal structure of the balloon dilation catheter 100 of the present application. Referring to fig. 4, where the passage tube 30 is fitted to the opening 21, the passage tube 30 is flush with the outer wall of the catheter 20. Because the catheter 20 needs to travel with the balloon 10 in the blood vessel, neither the channel tube 30 nor the guidewire tube 40 should extend out of the opening 21 to interfere with the travel of the catheter 20 or to interfere with the entry of blood into the second channel 52. The channel tube 30 and the guide wire tube 40 are both arranged to be flush with the outer wall of the catheter 20 at the opening 21, or slightly recessed from the opening 21, so that the catheter 20 can be ensured to have a smooth shape and be convenient to pass through a blood vessel.

In one embodiment, the balloon 10 is made from a nylon tube, a polyethylene tube, a polyesteramide tube, or a polyurethane tube. These materials have good mechanical properties, are relatively soft, and are easy to implant. Further, a portion of the passage tube 30 located in the inner cavity 11 is provided with a plurality of development marks 31, and the plurality of development marks 31 are located on an outer wall of the passage tube 30. The development mark 31 is opaque to the rays, and the plurality of development marks 31 are arranged on the outer wall of the channel tube 30 along the length direction of the channel tube 30, so that whether the balloon 10 reaches the lesion site can be observed through the development marks 31.

Please refer to the embodiments of fig. 5 and 6. In the embodiment of FIG. 5, a connector 60 is also provided between the channel tube 30 and the guidewire tube 40 at the second end 102. In particular, the connector 60 is here ring-shaped, or described as a connecting ring. The guide wire tube 40 passes through the inner ring of the connector 60, while the outer ring of the connector 60 abuts against the inner wall of the channel tube 30. The connector 60 is further provided with a plurality of through holes 61 between the guide wire tube 40 and the channel tube 30, and the through holes 61 are communicated between the second channel 52 and the blood vessel for the circulation of blood. The connector 60 may be made of a relatively rigid material to hold the guidewire tube 40 in a central position within the channel tube 30, which, as will be appreciated, is the central position of the balloon 10. When the sacculus 10 passes through the blood vessel along with the guide wire, the guide wire can always pass through the central position of the sacculus 10 due to the positioning effect of the connecting piece 60, namely, the sacculus 10 can not generate eccentricity due to the effect of the connecting piece 60, the sacculus 10 always passes through the blood vessel in a coaxial state with the guide wire, the balloon 10 is more favorable for the proceeding effect, and the overlarge unilateral pressure or friction force can not be caused on the blood vessel.

In the embodiment of fig. 6, a connection 60 is also provided between the channel tube 30 and the guide wire tube 40 at the opening 21. The connection 60 here also serves for the connection between the channel tube 30 and the guide wire tube 40. The position of the guidewire at the opening 21 may shift slightly from balloon 10 due to vessel bending, bifurcation, etc. effects to self-adjust and conform to the vessel shape. If the guidewire is too tightly coupled to the balloon 10, navigation of the balloon 10 through the vessel is compromised. Therefore, the connecting member 60 is made of a relatively flexible material at the opening 21, and the connecting member 60 has a certain elasticity, so that the guidewire tube 40 and the channel tube 30 can move relatively, which is beneficial to the implantation process of the balloon dilatation catheter 100 of the present application. It should be noted that in the embodiment of fig. 6, there are a plurality of connecting members 60 at the opening 21, and the plurality of connecting members 60 are strip-shaped, and the strip-shaped connecting members 60 are distributed between the guidewire tube 40 and the channel tube 30 along the circumferential direction of the guidewire tube 40. Such a configuration facilitates the connector 60 forming a gap between the guidewire tube 40 and the channel tube 30 for forming the second channel 52 and the blood flow path at the opening 21.

It should be noted that the connector 60 at the opening 21 and the connector 60 provided at the second end 102 are also connected to the guidewire tube 40 and the channel tube 30, respectively, by welding, so that the guidewire tube 40 and the channel tube 30 are in a fixed relation by welding. The guidewire tube 40, the passage tube 30 and the connector 60 are all separately manufactured, reducing process complexity. And through welded fastening, can guarantee to connect reliably each other. Further, the connecting member 60 at the opening 21 and the connecting member 60 at the second end 102 may be disposed at the same time, or both may be disposed, without affecting the function of the balloon dilatation catheter 100 of the present application. The material of the connector 60 may be nylon tube, polyvinyl chloride, polypropylene, polyethylene tube, polyesteramide tube, polyurethane tube, or other resin material, or the material of the connector 60 may be the same as the material of the channel tube 30, so that the connector can be welded and fixed to the channel tube 30 and the guide wire tube 40, respectively, and the blood circulation path is left.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. The utility model provides a sacculus expansion pipe which characterized in that, includes hollow sacculus, intercommunication the pipe of sacculus inner chamber and passageway pipe, the sacculus is including being close to the first end of pipe and keeping away from the second end of pipe, the pipe outer wall is equipped with the opening, passageway pipe one end with opening sealing connection, the other end of passageway pipe passes the sacculus and follows the second end intercommunication to outside the inner chamber, still inlay in the passageway pipe and be equipped with the wire guide pipe, the wire guide pipe is in respectively opening and second end department with the passageway pipe welded fastening, the wire guide pipe will the passageway pipe separates for first passageway and second passageway, and first passageway with the second passageway all follows the opening part communicates outside the second end.

2. The balloon dilation catheter of claim 1 wherein the length of the weld between the guidewire tube and the opening and the second end is maintained between 0.1 mm and 20 mm.

3. The balloon dilatation catheter of claim 2 wherein the channel tube has an outer diameter of 0.1-10 mm and the guidewire tube has an outer diameter of 0.08-8 mm.

4. The balloon dilation catheter of claim 2 wherein the distance between the opening and the first end is 200-400 mm.

5. The balloon dilation catheter of claim 2 wherein where the passage tube engages the second end, the passage tube extends beyond the second end;

6. The balloon dilation catheter according to claim 2 wherein the balloon is made of nylon tube, polyethylene tube, polyesteramide tube or polyurethane tube.

7. The balloon dilation catheter of claim 2 wherein a portion of the passage tube within the lumen is provided with a plurality of visualization marks on an outer wall of the passage tube.

8. The balloon dilatation catheter according to claim 1, wherein a connector is further provided at the opening and/or at the second end for welding fixation between the channel tube and the guide wire tube, and the connector is used for positioning the guide wire tube in the channel tube so that a guide wire passes through the center of the channel tube.

9. The balloon dilatation catheter of claim 8 wherein the connector comprises a flexible connector at the opening and the flexible connector is made of nylon tubing, polyvinyl chloride, polypropylene, polyethylene tubing, polyesteramide tubing, polyurethane tubing, or resin material or the same material as the channel tube.

10. The balloon dilation catheter according to claim 8, wherein the connector includes a connector ring located at the second end, the connector ring including an inner ring cooperating with the guidewire tube and an outer ring cooperating with the channel tube, the outer ring and the inner ring further having a plurality of vias disposed therebetween for communicating between the second channel and the outside of the second end.