Laser ablation balloon catheter

Abstract

The utility model discloses a laser ablation balloon catheter which comprises a main catheter, and a plurality of independent cavities are arranged in the main catheter and used for arranging a laser ablation catheter, an imaging catheter, a mapping catheter and an optical fiber respectively. The balloon is arranged outside the main catheter and covers the ablation area of the laser ablation catheter; the area, covered by the balloon, of the main catheter is made of a transparent material; the optical fiber is used for providing a light source; an imaging core is arranged at the far end of the imaging catheter, and the imaging catheter can rotate and collect images; the mapping catheter is used for mapping the electric signal of the inner wall of the blood vessel after ablation. The problem that in the ablation process of an ablation catheter, the ablation effect cannot be mapped through a mapping catheter is solved.

Description

Technical Field

[0001] The utility model relates to the field of atrial fibrillation ablation, in particular to a laser ablation balloon catheter. Background Art

[0002] Atrial fibrillation (AF) is the most common persistent arrhythmia. The incidence of AF increases with age, and can reach 10% in people over 75 years old. During AF, the frequency of atrial excitation reaches 300 to 600 beats per minute, and the heart rate is often fast and irregular, sometimes up to 100 to 160 beats per minute, which is not only much faster than a normal heartbeat, but also absolutely irregular, and the atrium loses its effective contraction function. The prevalence of AF is also closely related to coronary heart disease, hypertension, heart failure and other diseases.

[0003] Cryotherapy has been widely used in modern medicine. It kills specific tissues or cells by rapidly lowering the temperature of tissues to a certain level, thereby achieving therapeutic effects. It reduces the risk of complications, including atrioventricular conduction block, pulmonary vein stenosis, thrombosis and fistula formation. It can determine the target site for ablation through the low temperature effect.

[0004] At present, the mainstream radical treatment for atrial fibrillation is catheter ablation, which mainly uses pulmonary vein isolation as a means. Common types include radiofrequency ablation, cryoablation, laser ablation and pulse ablation. Among them, laser ablation balloon, as a new type of surgical medical device, has been used in the treatment of common diseases such as atrial fibrillation and has achieved good results. Laser ablation has a short treatment time, a low recurrence rate, and less negative effects compared with common treatment methods.

[0005] For radiofrequency ablation catheters, the "point-by-point ablation" operation takes a long time and requires a high level of catheter operation skills from the operator. At the same time, most patients experience mild to moderate pain and are prone to pulmonary vein stenosis after surgery. For cryoablation, the target tissue is coagulated and necrotized by releasing liquid refrigerant (N2O) to achieve the treatment effect. The entire process requires cooling and rewarming, and it cannot be stopped immediately like an ablation catheter. Therefore, the treatment process still needs to be optimized.

[0006] Currently, during the ablation process, only a mapping catheter can be used to monitor electrical signals to determine the ablation effect. The ablation position is observed through the development mark on the catheter, and the ablation effect is mapped through the mapping catheter. The current pulmonary vein ring mapping catheter has a long modeling time and a relatively long learning curve, and cannot monitor the treatment effect in real time. This results in a low success rate for a single ablation, a long operation time for doctors, a relatively low success rate, and a prolonged operation time. Utility Model Content

[0007] The utility model aims at least to provide a laser ablation balloon catheter, which is used to solve the problem that the ablation effect of the ablation catheter cannot be measured by a mapping catheter during the ablation process.

[0008] To achieve the above-mentioned purpose, the utility model provides a laser ablation balloon catheter, comprising: a main catheter, wherein a plurality of independent cavities are arranged inside the main catheter, for respectively arranging a laser ablation catheter, an imaging catheter, a mapping catheter, a cooling circulation system and an optical fiber; a balloon, wherein the balloon is arranged outside the main catheter and covers the ablation area of ​​the laser ablation catheter; the main catheter is made of transparent material in the area covered by the balloon; the optical fiber is used to provide a light source; an imaging core is arranged at the distal end of the imaging catheter, and the imaging catheter can rotate and perform image acquisition; a mapping catheter, which is used to map the electrical signals of the inner wall of the blood vessel after ablation.

[0009] Optionally, multiple independent cavities are arranged in the main catheter, including: an imaging channel for passing the imaging catheter; a mapping catheter channel for passing the mapping catheter; an ablation catheter channel for passing a laser ablation catheter; two optical fiber channels for passing optical fibers; and two liquid channels for passing liquids.

[0010] Optionally, the ablation catheter channel is located at a central position of the main catheter.

[0011] Optionally, the two optical fiber channels are symmetrically arranged on both sides of the imaging channel.

[0012] Optionally, the two liquid channels are symmetrically arranged on both sides of the ablation catheter channel.

[0013] Optionally, the centers of the ablation catheter channel, the mapping catheter channel and the imaging channel are located on a diameter of the main catheter.

[0014] Optionally, the mapping catheter is located distal to the balloon.

[0015] Optionally, the balloon is a super compliant balloon.

[0016] A laser ablation balloon catheter provided by an embodiment of the utility model has an imaging catheter arranged in the main catheter, and a light source is provided by an optical fiber. The operator can rotate the imaging catheter during the operation on the patient, and the image of the lesion can be collected through the imaging core. In this way, the operator can observe the effect of ablation at the pulmonary vein through the imaging catheter, and the mapping catheter can map the electrical signals inside the blood vessels after treatment to judge the ablation effect. The mapping catheter and the imaging catheter cooperate with each other to monitor the treatment effect in real time, improve the success rate of a single ablation, reduce the doctor's operation time, and shorten the operation time.

[0017] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of a laser ablation balloon catheter in an embodiment of the utility model.

[0020] Figure 2 It is a cross-sectional view of the main body of a laser ablation balloon catheter in an embodiment of the utility model.

[0021] Figure 3 It is a partial schematic diagram of a laser ablation balloon catheter in an embodiment of the utility model.

[0022] Figure 4 It is a partial schematic diagram of a laser ablation balloon catheter in an embodiment of the utility model.

[0023] Reference numerals:

[0024] 10 main catheters, 11 ablation catheter channels, 12 imaging channels, 13 mapping catheter channels, 14 optical fiber channels, 15 liquid channels, 16 developing rings, 110 ablation catheters, 120 imaging catheters, 130 mapping catheters, 20 handles, 30 balloons, and 40 pulmonary veins. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Reference below Figure 1-Figure 4 The present invention provides a laser ablation balloon catheter. Figure 1As shown, the handle 20 is used to control the movement of the laser ablation balloon catheter. The ablation catheter channel 11, the imaging channel 12, the mapping catheter channel 13, the optical fiber channel 14, and the liquid channel 15 extend from the outer end of the handle all the way into the main catheter 10. The distal end of the main catheter 10, that is, the end away from the operator and close to the lesion, is provided with a balloon 20. The main catheter 10 is made of transparent material in the area covered by the balloon 30. In this way, the main catheter 10 will minimize the interference with the image generation of the imaging catheter 120, making the collected image more accurate. Development rings 16 are respectively provided on the outer periphery of the main catheter 10 at both ends of the balloon 30 to display the position of the balloon 20 for the operator's observation. Among them, the mapping catheter 130 extends all the way to the distal end outside the balloon 30. If Figure 3 , Figure 4 As shown, the mapping catheter 130 is at the farthest end and is not within the coverage of the balloon 30. Before ablation, the mapping catheter first measures the electrical signal of the inner wall of the blood vessel, and withdraws the mapping catheter after the measurement, waiting for the ablation catheter. After the ablation is completed, the mapping catheter is transported to the corresponding position, and mapping is performed again to calculate the electrical signal difference and measure the mapping effect. The imaging catheter 120 and the ablation catheter 110 are in the balloon 30, and the ablation catheter 110 is in the middle. During the rotational ablation process of the ablation catheter 110, the imaging catheter 120 can synchronously collect image information of the pulmonary vein 40. Among them, the balloon 30 is a super-compliant balloon, which can increase the passability of the balloon 30.

[0027] like Figure 2 As shown, a plurality of independent cavities are arranged inside the main catheter 10, each cavity is used for the passage of a catheter or an optical fiber. Among them, the cavity at the center of the main catheter 10 is the ablation catheter channel 11, and the ablation catheter channel 11 is used for the passage of the ablation catheter 110. The imaging channel 12 and the mapping catheter channel 13 are on both sides of the ablation catheter channel 11, that is, the centers of the ablation catheter channel 11, the mapping catheter channel 13 and the imaging channel 12 are located on a diameter of the main catheter. An imaging catheter 120 is arranged in the imaging channel 12, and a mapping catheter channel 130 is arranged in the mapping catheter channel 13. The optical fiber channel 14 is arranged on both sides of the imaging channel 13. The optical fiber channel 14 is used for the passage of the optical fiber. The optical fiber can pass light and provide a light source for the imaging catheter 120 in the imaging channel 12. The cooling circulation system includes two liquid channels 15, which are arranged on both sides of the ablation catheter channel 11. The two liquid channels 15 and the center of the ablation catheter channel 11 are located on the diameter of the main catheter 10, and are perpendicular to the diameter formed by the ablation catheter channel 11, the mapping catheter channel 13 and the imaging channel 12. The liquid channel 15 is used to allow liquid or coolant to pass through, and the two separate arrangements are beneficial to the cooling or heat dissipation of the liquid.

[0028] An imaging catheter 120 is arranged in the main catheter 10, and a light source is provided by an optical fiber. The operator can rotate the imaging catheter 120 during the operation on the patient, and the image of the lesion can be collected through the imaging core. In this way, the operator can observe the effect of ablation at 40 pulmonary veins through the imaging catheter 120. The mapping catheter 130 cooperates with the imaging catheter 120 to monitor the treatment effect in real time, improve the success rate of a single ablation, reduce the doctor's operation time, and shorten the operation time.

[0029] The image information collected by the imaging catheter 120 can be used to observe the condition of the pulmonary veins in real time, quickly judge and give a treatment plan, shorten the operation time and make it convenient for doctors to observe the ablation path in real time, which is convenient for doctors to operate; at the same time, during the laser ablation process, the ablation effect can be observed in real time through the image information collected by the imaging catheter 120, and different ablation plans can be given according to different pathological structures, thereby improving the success rate of a single ablation; after the ablation is completed, the mapping catheter 130 is used to judge the ablation result and whether re-treatment is needed, thereby improving the success rate of a single operation.

[0030] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A laser ablation balloon catheter, It is characterized in that include: A main catheter, wherein a plurality of independent cavities are arranged in the main catheter, for respectively arranging a laser ablation catheter, an imaging catheter, a mapping catheter, a cooling circulation system and an optical fiber; A balloon, which is arranged outside the main catheter and covers the ablation area of ​​the laser ablation catheter; The main catheter is made of transparent material in the area covered by the balloon; The optical fiber is used to provide a light source; An imaging core is disposed at the distal end of the imaging catheter, and the imaging catheter can rotate and perform image acquisition; Mapping catheter, used to map the electrical signals of the inner wall of the blood vessel after ablation.

2. The laser ablation balloon catheter according to claim 1, It is characterized in that The main conduit is provided with a plurality of independent cavities including: an imaging channel, for passing the imaging catheter; a mapping catheter channel, used for passing the mapping catheter; an ablation catheter channel, used for passing a laser ablation catheter; two fiber channels for passing optical fibers; Two liquid channels; used to allow liquid to pass through.

3. The laser ablation balloon catheter according to claim 2, It is characterized in that The ablation catheter channel is located at the center of the main catheter.

4. The laser ablation balloon catheter according to claim 3, It is characterized in that The two optical fiber channels are symmetrically arranged on both sides of the imaging channel.

5. The laser ablation balloon catheter according to claim 3, It is characterized in that The two liquid channels are symmetrically arranged on both sides of the ablation catheter channel.

6. The laser ablation balloon catheter according to claim 3, It is characterized in that The centers of the ablation catheter channel, the mapping catheter channel, and the imaging channel are located on a diameter of the main catheter.

7. The laser ablation balloon catheter according to any one of claims 1 to 6, It is characterized in that The mapping catheter is located distal to the balloon.

8. The laser ablation balloon catheter according to any one of claims 1 to 6, It is characterized in that The balloon is a super-compliant balloon.

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