Double-balloon catheter with directional puncture indication function

Abstract

The utility model discloses a double-balloon catheter with a directional puncture indication function, which relates to the technical field of puncture catheters and specifically comprises a catheter body provided with an inner catheter and an outer catheter, a columnar balloon arranged on the outer catheter and positioned at the front end of the outer catheter, and a spherical balloon arranged on the outer catheter and positioned in the middle or in the front of the columnar balloon, a first air pipe communicated with the columnar balloon and a second air pipe communicated with the spherical balloon are arranged in the outer pipe. The columnar balloon and the spherical balloon are arranged on the tube body provided with the inner tube and the outer tube, the columnar balloon is arranged on the spherical balloon in a sleeving mode, a space under the intima or in the plaque is created through the columnar balloon, the circle center of the two-dimensional projection of the spherical balloon is used as the directional indication direction of the reverse guide wire, and therefore the guide wire can be stably guided. The problem that the guide wire punctures outside a blood vessel due to the fact that the puncture part of the guide wire is poor and the advancing direction of the guide wire is wrong is avoided, the puncture accuracy of the guide wire is effectively improved, and the problem that the guide wire punctures outside the blood vessel is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of puncture catheter technology, specifically a double balloon catheter with directional puncture indication function. Background Technology

[0002] Reverse CART (Reverse Subintimal Pathway) is currently the main method for recanalizing CTOs (reverse guidewire techniques in percutaneous coronary intervention (PCI)). Its main principle is to advance the guidewire and balloon forward, dilate the CTO lesion to create an enlarged true or false lumen, and then manipulate the reverse guidewire through the channel created by the forward balloon to ultimately enter the true lumen of the vessel proximal to the CTO. Reverse CART is primarily suitable for complex reverse CTO interventions, such as long lesions, calcified lesions, and tortuous vessel lesions, and is highly valuable for recanalizing reverse CTOs.

[0003] Improper operation during Reverse CART can lead to failure. One major problem is improper guidewire puncture site or incorrect guidewire direction, which can result in the puncture going outside the blood vessel. Therefore, this application proposes a dual-balloon catheter with directional puncture guidance function. Utility Model Content

[0004] The purpose of this invention is to propose a dual-balloon catheter with directional puncture indication function to solve the problem that during the Reverse CART procedure, the guidewire puncture site is often poor or the guidewire travels in the wrong direction, resulting in puncture outside the blood vessel.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a double-balloon catheter with directional puncture indication function, comprising:

[0006] The tube body includes an inner tube for guiding the guide wire and an outer tube wrapped around the inner tube;

[0007] A cylindrical balloon is placed on the outer tube and located at its anterior end;

[0008] A spherical balloon is placed on the outer tube and located in the middle or anterior part of the cylindrical balloon;

[0009] The outer tube contains a first trachea that communicates with the cylindrical balloon and a second trachea that communicates with the spherical balloon.

[0010] Preferably, the tube body is provided with a guide port for guidewire insertion and exit, which passes through the outer tube and communicates with the inner tube. The outer tube is divided into trachea one and trachea two by a partition strip. Trachea one is provided with multiple air holes one communicating with the cylindrical balloon, and trachea two is provided with air holes two communicating with the balloon.

[0011] Preferably, one end of the tube has an opening for the guidewire to pass through, and the other end has an interface for connecting an air pump. The diameter of the inflated balloon is 2mm-3mm.

[0012] Preferably, the outer wall of the spherical balloon is connected to the inner wall of the cylindrical balloon to divide the cylindrical balloon into a first cylindrical chamber and a second cylindrical chamber; the trachea includes a first trachea and a second trachea, the first trachea communicating with the first cylindrical chamber and the second trachea communicating with the second cylindrical chamber. The first trachea, the second trachea, and the second trachea are each wrapped around the inner tube at a 120-degree angle.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This application utilizes a cylindrical balloon and a spherical balloon within a tube containing an inner and outer tube, with the cylindrical balloon fitted over the spherical balloon. The cylindrical balloon creates a space under the intima or within the plaque, while the center of the two-dimensional projection of the spherical balloon serves as the directional indicator for the retrograde guidewire. This approach avoids problems such as poor guidewire puncture site or incorrect guidewire direction, which could lead to puncture outside the blood vessel. This effectively improves the accuracy of guidewire puncture and significantly reduces the occurrence of guidewire puncture outside the blood vessel. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the internal structure of the utility model double balloon catheter;

[0017] Figure 2 for Figure 1 Enlarged diagram of part A in the diagram;

[0018] Figure 3 This is a schematic diagram of a double balloon catheter with directional puncture indication function according to this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the tube body of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the double balloon catheter according to another embodiment of the present invention;

[0021] Figure 6 for Figure 5Enlarged schematic diagram of part B in the diagram;

[0022] Figure 7 This is a schematic diagram of the tube cross-section of another embodiment of the present invention.

[0023] In the diagram: 1-tube body; 11-inner tube; 12-outer tube; 13-interface; 2-cylindrical balloon; 21-first cylindrical chamber; 22-second cylindrical chamber; 3-balloon; 4-trachea one; 41-air pore one; 401-first trachea one; 402-second trachea one; 5-trachea two; 51-air pore two; 6-guidewire. Detailed Implementation

[0024] To better understand the structure, functional features, and advantages of this utility model, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0025] Example 1:

[0026] like Figures 1 to 4 As shown, this utility model provides a dual-balloon catheter with directional puncture indication function, specifically comprising:

[0027] Tube body 1, tube body 1 includes an inner tube 11 for guiding wire 6 to pass through and out and an outer tube 12 wrapped around the inner tube 11;

[0028] A cylindrical balloon 2 is mounted on the outer tube 12 and located at its anterior end;

[0029] A spherical balloon 3 is disposed on the outer tube 12 and located in the middle or front of the cylindrical balloon 2;

[0030] The outer tube 12 is provided with a first trachea 4 that communicates with the cylindrical balloon 2 and a second trachea 5 that communicates with the spherical balloon 3.

[0031] By placing a cylindrical balloon 2 and a spherical balloon 3 on the tube body 1, which has an inner tube 11 and an outer tube 12, and placing the cylindrical balloon 2 on the spherical balloon 3, a space is created under the intima or within the plaque by relying on the cylindrical balloon 2. The center of the two-dimensional projection of the spherical balloon 3 is used as the directional indicator for the retrograde guidewire to avoid the problem of puncturing outside the blood vessel when the retrograde guidewire is puncturing towards the cylindrical balloon 2. By setting the spherical balloon 3, the retrograde guidewire uses the center of the two-dimensional projection of the spherical balloon 3 as the directional puncture indicator to accurately enter the true lumen of the blood vessel proximal to the CTO.

[0032] See Figure 1 and Figure 3 The tube body 1 of this application is provided with a guide port for the guide wire 6 to be inserted and exited. The guide port passes through the outer tube 12 and communicates with the inner tube 11 to facilitate the insertion and exit of the guide wire 6.

[0033] See Figure 2 and Figure 4 In this application, the outer tube 12 is divided into trachea 4 and trachea 5 by a partition strip, so as to inflate the cylindrical balloon 2 and the spherical balloon 3 respectively through trachea 4 and trachea 5.

[0034] See Figure 2 and Figure 4 In this application, the first trachea 4 is provided with multiple air holes 41 that communicate with the cylindrical balloon 2, and the second trachea 5 is provided with air holes 51 that communicate with the balloon 3; the provision of multiple air holes 41 can achieve uniform inflation of the cylindrical balloon 2.

[0035] See Figure 1 and Figure 3 One end of the tube body 1 of this application is provided with an opening for the guidewire 6 to pass through, and the other end of the tube body 1 is provided with an interface 13 for connecting an air pump. The interface 13 can be a three-channel port to facilitate the control of air intake and exhaust of the first trachea 4 and the second trachea 5, thereby controlling the individual or simultaneous operation of the cylindrical balloon 2 and the spherical balloon 3. The cylindrical balloon 2 and the spherical balloon 3 of this application can operate independently or be inflated synchronously during operation, so that the cylindrical balloon 2 can create a space under the endometrium or within the plaque, and the spherical balloon 3 serves as an indicator ball for the directional movement of the retrograde guidewire.

[0036] See Figure 2 The diameter of the spherical balloon 3 after inflation is 2mm-3mm, preferably 2.5mm.

[0037] Example 2:

[0038] As another embodiment of this application, such as Figures 5 to 7As shown, when the spherical balloon 3 is disposed on the outer tube 12 and located in the middle or near the front of the cylindrical balloon 2, the outer wall of the spherical balloon 3 is connected to the inner wall of the cylindrical balloon 2 to divide the cylindrical balloon 2 into two independent chambers, namely the first cylindrical chamber 21 and the second cylindrical chamber 22. The trachea 4 includes a first trachea 401 and a second trachea 402. The first trachea 401 is used to communicate with the separated first cylindrical chamber 21, and the second trachea 402 is used to communicate with the separated second cylindrical chamber 22. The first trachea 401 and the second trachea 402 are connected by a connection port for separate air intake and exhaust. The first trachea 401 is provided with a first air hole for air intake and exhaust into the first cylindrical chamber 21, and the second trachea 402 is provided with a second air hole for air intake and exhaust into the second cylindrical chamber 22, so as to realize separate air intake and exhaust into the two independent chambers. Furthermore, the first trachea 401, the second trachea 402, and the second trachea 5 of this application are respectively wrapped around the inner tube 11 at a 120-degree angle. In this embodiment, the inner walls of the spherical balloon 3 and the cylindrical balloon 2 are connected to divide the cylindrical balloon 2 into a first cylindrical chamber 21 and a second cylindrical chamber 22. This allows for control of the inflation length of the cylindrical balloon 2 by inflating it into the first cylindrical chamber 21 and / or the second cylindrical chamber 22, enabling the formation of cylindrical balloons of different lengths and thus effectively improving its applicability.

[0039] Furthermore, the tube body 1 of this application adopts a three-valve connection method (not shown) so that the three valve ports can be connected to the first air tube 401, the second air tube 402 and the second air tube 5 respectively, thereby allowing the air pump to control the air intake of the first columnar chamber 21, the second columnar chamber 22 and the spherical balloon 3 respectively.

[0040] The working principle of this application is as follows: The antegrade guidewire, supported by the inner tube 11, enters the occluded segment and advances to a distance of 5-10 mm from the distal fibrous cap. Then, the cylindrical balloon 2 and the spherical balloon 3 are pushed along the antegrade guidewire to its tip. The cylindrical balloon 2 is inflated through the air pump interface 13 to create a space under the intima or within the plaque. Immediately afterwards, the cylindrical balloon 2 is deflated, and the spherical balloon 3 is inflated to completely fill it, forming a spherical structure. The retrograde guidewire then advances towards the antegrade spherical balloon 3.

[0041] From two fluoroscopic positions, the central circle of the two-dimensional projection of the spherical balloon 3 in this application serves as the guiding direction for the reverse guidewire, thus avoiding the problem of the reverse guidewire puncturing outside the blood vessel towards the center.

[0042] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A dual-balloon catheter with directional puncture indication function, characterized in that: include: The tube body (1) includes an inner tube (11) for guiding the guide wire (6) and an outer tube (12) wrapped around the inner tube (11). A cylindrical balloon (2) is disposed on the outer tube (12) and located at its front end; A spherical balloon (3) is disposed on the outer tube (12) and located in the middle or front of the cylindrical balloon (2); The outer tube (12) is provided with a first trachea (4) communicating with the columnar balloon (2) and a second trachea (5) communicating with the spherical balloon (3).

2. The dual-balloon catheter with directional puncture indication function as described in claim 1, characterized in that: The tube body (1) is provided with a guide port for the guide wire (6) to pass through and exit. The guide port passes through the outer tube (12) and communicates with the inner tube (11).

3. A dual-balloon catheter with directional puncture indication function as described in claim 2, characterized in that: The outer tube (12) is divided into trachea one (4) and trachea two (5) by a partition strip.

4. A dual-balloon catheter with directional puncture indication function as described in claim 3, characterized in that: The first trachea (4) is provided with a plurality of air holes (41) communicating with the columnar balloon (2), and the second trachea (5) is provided with air holes (51) communicating with the spherical balloon (3).

5. A dual-balloon catheter with directional puncture indication function as described in claim 1, characterized in that: One end of the tube (1) is provided with an opening for the guide wire (6) to pass through, and the other end of the tube (1) is provided with an interface (13) for connecting an air pump.

6. A dual-balloon catheter with directional puncture indication function as described in claim 1, characterized in that: The diameter of the spherical balloon (3) is 2mm-3mm.

7. A dual-balloon catheter with directional puncture indication function as described in claim 1, characterized in that: The outer wall of the spherical balloon (3) is connected to the inner wall of the cylindrical balloon (2) to divide the cylindrical balloon (2) into a first cylindrical chamber (21) and a second cylindrical chamber (22); the trachea (4) includes a first trachea (401) and a second trachea (402), the first trachea (401) is connected to the first cylindrical chamber (21), and the second trachea (402) is connected to the second cylindrical chamber (22).

8. A dual-balloon catheter with directional puncture indication function as described in claim 7, characterized in that: The first trachea (401), the second trachea (402), and the second trachea (5) are wrapped around the inner tube (11) at a 120-degree angle.

9. A dual-balloon catheter with directional puncture indication function as described in claim 7, characterized in that: The first air pipe (401) is provided with a first air hole for air intake and exhaust to the first columnar chamber (21), and the second air pipe (402) is provided with a second air hole for air intake and exhaust to the second columnar chamber (22).

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