Ultrasound catheter

Abstract

The invention provides an ultrasonic catheter, which comprises a catheter body, an ultrasonic probe, an ultrasonic probe, an ultrasonic probe, an ultrasonic probe, an ultrasonic probe and an ultrasonic probe, and is characterized in that an inner cavity is formed in the catheter body; the ultrasonic element is arranged in the inner cavity, and ultrasonic waves emitted by the ultrasonic element are emitted from the ultrasonic window and form an imaging field domain on the outer side of the tube body; the ablation element is arranged in the inner cavity, ultrasonic waves emitted by the ablation element are emitted from the ultrasonic window and form an ablation field domain on the outer side of the tube body, the imaging field domain and the ablation field domain have a coincident intersection field domain, and the intersection field domain is used for imaging and ablation of lesion tissue; according to the ultrasonic catheter provided by the invention, the problem of low efficiency of abnormal tissue positioning and operation angle adjustment in the cardiovascular interventional operation process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an ultrasonic catheter. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and does not constitute prior art.

[0003] In the field of cardiovascular disease treatment, the contraction and relaxation of the heart are mainly achieved through electrophysiological conduction, and arrhythmia is often caused by tissue with abnormal electrophysiological conduction. In some cases of abnormal tissue, aortic valve calcification caused by inflammation or abnormal nerve bundles caused by inflammation are often the cause of symptoms such as arrhythmia and myocardial ischemia, and are also the cause of further complications such as heart attack and stroke. For the treatment of aortic valve calcification, the current treatment methods include: aortic implantation and coronary artery stent implantation, but these pioneering surgeries will cause greater trauma to patients and are not conducive to the rapid recovery of patients. Therefore, the use of minimally invasive treatment options is a new research direction for solving aortic valve calcification.

[0004] In the field of minimally invasive treatment technology, it is mainly achieved through interventional surgery. Therefore, the current surgical method mainly uses interventional surgery to cut the abnormal aortic valve. In other methods, radio frequency is used to ablate the abnormal nerve bundles or abnormal aortic valve; however, the calcified area of ​​the aortic valve is small, and the abnormal nerve bundles are even smaller, making it difficult to determine the position through a video probe. Therefore, in existing surgical procedures, radio frequency imaging equipment is basically used to closely observe the electrophysiological conduction nerve bundles and locate the abnormal parts. For example, a CT machine or an X-ray machine is used to perform real-time irradiation imaging positioning on the human body. Then the surgeon needs to observe the imaging video while adjusting the surgical angle of the interventional device. The surgical positioning is time-consuming, the surgical steps are relatively cumbersome, the risk of positioning errors is high, and unnecessary damage to the patient is caused. At the same time, during the current surgery, although lead pads are laid in the surgical area to isolate most of the radiation, most of the human body still needs to be exposed to radiation for surgery. Ionizing radiation can cause unnecessary damage to the human body, resulting in many restrictions on the surgery.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present invention and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the present invention. Summary of the invention

[0006] The purpose of the present invention is to provide an ultrasonic catheter, which solves the problem of low efficiency in locating abnormal tissue and adjusting the surgical angle during cardiovascular intervention surgery.

[0007] The above-mentioned implementation objectives of the present invention are mainly achieved by the following technical solutions:

[0008] The present invention provides an ultrasonic catheter, comprising:

[0009] A tube body, wherein an inner cavity is provided inside the tube body, and an ultrasonic window is provided on the tube body;

[0010] An ultrasonic element is disposed in the inner cavity, and the ultrasonic wave emitted by the ultrasonic element is emitted from the ultrasonic window and forms an imaging field outside the tube body;

[0011] An ablation element is arranged in the inner cavity. The ultrasonic waves emitted by the ablation element are emitted from the ultrasonic window and form an ablation field outside the tube body. The imaging field and the ablation field have an overlapping intersection field, and the intersection field is used to image and ablate the diseased tissue.

[0012] In a specific embodiment, the ultrasonic element has a first emitting surface for emitting ultrasonic waves, and the ablation element has a second emitting surface for emitting ultrasonic waves;

[0013] The first emitting surface and the second emitting surface are both arranged to face the ultrasonic window, and a first angle is formed between the first emitting surface and the second emitting surface.

[0014] In a specific embodiment, the first angle is greater than or equal to 120°, and the first angle is less than or equal to 150°.

[0015] In a specific embodiment, the first emitting surface and the second emitting surface are planes, or the first emitting surface and the second emitting surface are arc surfaces that are concave in a direction away from the ultrasound window.

[0016] In a specific embodiment, the ablation element has a first element and a second element that emit ultrasound waves of different frequencies;

[0017] The ultrasonic wave emitted by the first element is emitted from the ultrasonic window and forms a first acoustic wave field outside the tube body;

[0018] The ultrasonic wave emitted by the second element is emitted from the ultrasonic window and forms a second acoustic wave field outside the tube body;

[0019] The first sound wave field and the second sound wave field have an overlapping field, and the overlapping field is used to ablate the diseased tissue.

[0020] In a specific embodiment, the overlapping field is at least a portion of the intersection field.

[0021] In a specific embodiment, the first element and the second element are arranged along the axial direction of the tube body, the first element has a first sound wave surface that emits ultrasonic waves, the second element has a second sound wave surface that emits ultrasonic waves, and the first sound wave surface and the second sound wave surface are arranged at a second angle.

[0022] In a specific embodiment, the second angle is greater than or equal to 120°, and the second angle is less than or equal to 150°.

[0023] In a specific embodiment, the ultrasound window is provided with a light-transmitting member.

[0024] In a specific embodiment, the light-transmitting member is a concave lens that is concave toward the inner side of the tube body;

[0025] Or, the light-transmitting member is a convex lens protruding toward the outside of the tube body;

[0026] Alternatively, the light-transmitting element is a plane mirror.

[0027] In a specific embodiment, the ultrasonic element and the ablation element are arranged side by side along the axial direction of the tube body, or the ultrasonic element and the ablation element are arranged side by side along the circumferential direction of the tube body.

[0028] In a specific embodiment, the ultrasonic element is an array transducer, and the first element and the second element are both single-element transducers.

[0029] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0030] The ultrasonic catheter provided by the present invention can be inserted into the body of a living being to be operated on by arranging the ultrasonic element and the ablation element together in the tube body. At the same time, the ultrasonic element can be emitted outward from the ultrasonic window of the tube body to form an imaging field, and can image the medium in the body of the living being. The imaging angle and position can be adjusted according to the operation control of the surgical operator, and the diseased tissue can be imaged separately in cooperation with the surgery more accurately, avoiding the problem of excessive radiation caused by using large-scale CT machines and other imaging equipment to image the entire body, which affects the health of the body; the ablation element is arranged in the tube body, and can be emitted outward from the ultrasonic window of the tube body to form an ablation field, and the diseased tissue in the body can be ablated. The angle and orientation can be adjusted more flexibly according to the operation of the operator, thereby improving the success rate of the operation.

[0031] The imaging field of the ultrasonic element partially overlaps with the ablation field of the ablation element, so that the operator can observe the diseased tissue in the intersection field and control the ablation element to ablate the diseased tissue, thereby improving the efficiency and accuracy of the operation and avoiding the risks of positioning deviation and surgical accidents caused by the separate positioning of the ultrasonic element and the ablation element. At the same time, the ablable range can be dynamically marked in the imaging picture formed by the ultrasonic element according to the intersection field, achieving a sight effect, further improving the surgical accuracy of the ultrasonic catheter and improving the efficiency of the ablation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a structural diagram of the ultrasonic catheter of the present invention;

[0033] Figure 2 It is a sound wave focal region diagram of the first embodiment of the intersection field of the ultrasound catheter of the present invention;

[0034] Figure 3 It is a sonic focal region diagram of a second embodiment of the intersection field of the ultrasonic catheter of the present invention;

[0035] Figure 4 The acoustic focal region diagram of the first embodiment of the overlap field of the ultrasonic catheter of the present invention;

[0036] Figure 5 The acoustic focal region diagram of the second embodiment of the overlap field of the ultrasonic catheter of the present invention;

[0037] Figure 6 is a cross-sectional structural diagram of the ultrasonic element and the ablation element of the present invention;

[0038] Figure 7 is a structural diagram of a first embodiment of a light-transmitting member of the present invention;

[0039] Figure 8 is a structural diagram of a second embodiment of a light-transmitting member of the present invention;

[0040] Fig. 9 is a structural diagram of a third embodiment of a light-transmitting member of the present invention;

[0041] Fig.10 A structural diagram of a flexible circuit board of an ultrasonic catheter of the present invention;

[0042] Fig.11 The diagram is an arrangement diagram of the array transducer leads and the single-element transducer leads of the ultrasound catheter of the present invention.

[0043] Description of Figure Numbers:

[0044] 1. Tube body; 11. Inner cavity; 12. Ultrasonic window;

[0045] 2. Ultrasonic element; 21. Imaging field; 22. First emission surface;

[0046] 3. ablation element; 31. ablation field; 32. second emission surface; 33. first element; 331. first acoustic wave surface; 332. first acoustic wave field; 34. second element; 341. second acoustic wave surface; 342. second acoustic wave field;

[0047] 4. Intersection field;

[0048] 5. Overlapping fields;

[0049] 6. Light-transmitting parts;

[0050] 71. matching layer; 72. piezoelectric layer; 73. backing layer;

[0051] 81. Flexible circuit board; 82. Array transducer lead wire; 83. Single element transducer lead wire;

[0052] A. The first angle;

[0053] B. The second angle. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0055] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0057] like Figure 1 and Figure 2As shown, the present invention provides an ultrasonic catheter, comprising:

[0058] The tube body 1 has an inner cavity 11 therein and an ultrasonic window 12 is provided on the tube body 1;

[0059] The ultrasonic element 2 is disposed in the inner cavity 11. The ultrasonic wave emitted by the ultrasonic element 2 is emitted from the ultrasonic window 12 and forms an imaging field 21 outside the tube body 1.

[0060] The ablation element 3 is arranged in the inner cavity 11. The ultrasonic wave emitted by the ablation element 3 is emitted from the ultrasonic window 12 and forms an ablation field 31 outside the tube body 1. The imaging field 21 and the ablation field 31 have an overlapping intersection field 4. The intersection field 4 is used to image and ablate the diseased tissue.

[0061] The ultrasonic catheter provided by the present invention can be inserted into the body of a living being to be operated on along with the body 1 by arranging the ultrasonic element 2 and the ablation element 3 together in the body 1. At the same time, the ultrasonic element 2 can be emitted outward from the ultrasonic window 12 of the body 1 to form an imaging field 21, and can image the medium in the body of the living being. The imaging angle and position can be adjusted according to the operation control of the surgical operator, and the diseased tissue can be imaged separately in cooperation with the surgery more accurately, avoiding the use of large-scale CT machines and other imaging equipment to image the entire body, resulting in excessive radiation and affecting the health of the body.

[0062] The ablation element 3 is arranged in the tube body 1, and can emit ultrasonic waves from the ultrasonic window 12 of the tube body 1 to form an ablation field 31, so as to ablate the diseased tissue in the biological body. It can more flexibly adjust the angle and direction according to the operation of the operator, thereby improving the success rate of the operation.

[0063] The imaging field 21 of the ultrasonic element 2 partially overlaps with the ablation field 31 of the ablation element 3, so that the operator can observe the diseased tissue in the intersection field 4 and control the ablation element 3 to ablate the diseased tissue, thereby improving the efficiency and accuracy of the operation and avoiding the risks of positioning deviation and surgical accidents caused by the separate positioning of the ultrasonic element 2 and the ablation element 3. In this embodiment, the ultrasonic wave emitted by the ultrasonic element 2 and the ultrasonic wave emitted by the ablation element 3 have different frequencies and intensities, so as to achieve different effects respectively.

[0064] According to the intersection field 4, the ablation range can be dynamically marked in the imaging picture formed by the ultrasonic element 2 to achieve a sighting mirror effect, further improve the surgical accuracy of the ultrasonic catheter, and improve the operating efficiency of the ablation operation.

[0065] In the present embodiment, the tube body 1 is generally a tube column structure. In other embodiments, there is no specific limitation on the structure of the tube body 1. An inner cavity 11 is provided inside the tube body 1 of the present embodiment, and an ultrasonic window 12 is opened on the peripheral side of the tube body 1, exposing the inner cavity 11. In the present embodiment, the ultrasonic window 12 is an opening opened on the side wall of the tube body 1, and the ultrasonic window 12 is connected to the inner cavity 11 inside the tube body 1. In other embodiments, the ultrasonic window 12 can also be a transparent window formed on the side wall of the tube body 1, one side of the transparent window corresponds to the outer side of the tube body 1, and the other side of the transparent window corresponds to the inner cavity 11 inside the tube body 1, so that ultrasonic waves and ultrasonic waves can pass through the ultrasonic window 12. There is no specific limitation on the shape and structure of the ultrasonic window 12.

[0066] In this embodiment, an ultrasonic element 2 and an ablation element 3 are respectively provided in the inner cavity 11, wherein, in this embodiment, the ultrasonic element 2 is an element that forms an image through ultrasonic waves, and the ablation element 3 is an element that can cause damage to a biological body through ultrasonic waves. In other embodiments, no specific restrictions are made on the structures, elements, and action mechanisms of the ultrasonic element 2 and the ablation element 3.

[0067] In this embodiment, the ablation element 3 is an element that can use the interaction of ultrasound waves of different frequencies at overlapping positions to produce a cavitation effect on the calcified structure of the diseased tissue. In other embodiments, the ablation element 3 can also be an element that uses ultrasound waves to generate heat to burn and ablate the diseased tissue, and there is no specific limitation on this. In other embodiments, the ultrasonic element 2 can also be an X-ray element, a CT element, etc., and there is no specific limitation on this.

[0068] In this embodiment, the transmitting end of the ablation element 3 is arranged toward the ultrasonic window 12. The ultrasonic wave emitted by the ablation element 3 can be emitted from the ultrasonic window 12 to the outside of the tube body 1. The ultrasonic wave has an ultrasonic focusing phenomenon on the emission path. An ablation field 31 is formed within the focusing range of the ultrasonic wave and within the ablation range that can produce an effective ablation effect. The specific range of the ablation field 31 is determined according to the power of the ablation element 3 and the characteristics of the diseased tissue.

[0069] In this embodiment, the transmitting end of the ultrasonic element 2 is arranged toward the ultrasonic window 12, and the ultrasonic wave emitted by the ultrasonic element 2 can be emitted from the ultrasonic window 12 to the outside of the tube body 1. The ultrasonic wave has an ultrasonic focusing phenomenon on the emission path, and an imaging field 21 is formed within the focusing range of the ultrasonic wave and within the range that can produce a clear imaging image. The specific range of the imaging field 21 is determined according to the power of the imaging element and the characteristics of the diseased tissue.

[0070] In this embodiment, the imaging field 21 and the ablation field 31 selected in combination with the above-mentioned characteristics have an overlapping intersection field 4, that is, in the intersection field 4, the ultrasound element 2 can clearly image the diseased tissue, and at the same time, in the intersection field 4, the ablation element 3 can effectively ablate the diseased tissue.

[0071] In other embodiments, an imaging image may be formed according to the ultrasound element 2, and an ablation point may be set in the imaging image in combination with the effective ablation range of the ablation element 3, so as to achieve the effect of directly performing targeted ablation according to the imaging image.

[0072] like Figures 1 to 3 As shown, in a specific embodiment, the ultrasonic element 2 has a first emitting surface 22 for emitting ultrasonic waves, and the ablation element 3 has a second emitting surface 32 for emitting ultrasonic waves;

[0073] The first emitting surface 22 and the second emitting surface 32 are both arranged to face the ultrasonic window 12 , and a first angle A is formed between the first emitting surface 22 and the second emitting surface 32 .

[0074] The ultrasonic catheter provided by the present invention provides a first emitting surface 22 on the ultrasonic element 2 and a second emitting surface 32 on the ablation element 3, so that the ultrasonic element 2 can emit ultrasonic waves through the first emitting surface 22 and the ablation element 3 can emit ultrasonic waves through the second emitting surface 32.

[0075] Furthermore, the first emitting surface 22 and the second emitting surface 32 are both arranged to face the ultrasonic window 12, so that the ultrasonic waves emitted by the ablation element 3 can be emitted from the ultrasonic window 12 to the outside of the tube body 1, and the ultrasonic waves emitted by the ultrasonic element 2 can be emitted from the ultrasonic window 12 to the outside of the tube body 1.

[0076] Furthermore, there is a first angle A between the first emitting surface 22 and the second emitting surface 32, so that the emission direction of the ultrasonic wave can be set at an angle with the emission direction of the ultrasonic wave, that is, the imaging field 21 and the ablation field 31 can have an overlapping intersection field 4, so that in the intersection field 4, the ultrasonic element 2 can clearly image the diseased tissue, and the ablation element 3 can effectively ablate the diseased tissue.

[0077] In the present embodiment, an ultrasonic window 12 is provided on the tube body 1. In other embodiments, a plurality of ultrasonic windows 12 may be provided on the tube body 1. There is no specific limitation on the number of ultrasonic windows 12. In the present embodiment, the first emission surface 22 and the second emission surface 32 face the same ultrasonic window 12. In other embodiments, the first emission surface 22 and the second emission surface 32 may also be provided facing two different ultrasonic windows 12, respectively. There is no specific limitation on the ultrasonic window 12 facing the first emission surface 22 and the ultrasonic window 12 facing the second emission surface 32.

[0078] In the present embodiment, the first emission surface 22 and the second emission surface 32 are arranged adjacent to each other, and the first emission surface 22 and the second emission surface 32 are arranged to be inclined toward each other to form a first angle A, wherein the first angle A is arranged toward the same ultrasonic window 12. In other embodiments, when the first emission surface 22 and the second emission surface 32 are respectively facing two different ultrasonic windows 12, the plane where the first emission surface 22 is located and the plane where the second emission surface 32 is located are arranged at the first angle A, and the intersection field 4 is located on the outside of the tube body 1.

[0079] Related References Figure 2 As shown, in this embodiment, the first angle A is set to be an obtuse angle, and the specific angle of the first angle A is not specifically limited.

[0080] like Figure 2 As shown, in a specific embodiment, the first angle A is greater than or equal to 120°, and the first angle A is less than or equal to 150°.

[0081] The ultrasonic catheter provided by the present invention can avoid the problem that the intersection field 4 where the imaging field 21 and the ablation field 31 overlap is too far from the tube body 1 due to the first angle A being too large, thereby affecting the normal operation of the ultrasonic catheter in the organism; it can also avoid the problem that the intersection field 4 where the imaging field 21 and the ablation field 31 overlap is too close to the tube body 1 due to the first angle A being too small, thereby causing the ultrasonic catheter to need to be too close to the diseased tissue when operating in the organism, and the ultrasonic catheter may rub and damage other healthy tissues of the organism, affecting the health of the organism.

[0082] In this embodiment, the first angle A can be any angle between 120° and 150°, for example, 130°. The first angle A can also be 120° or 150°. In this embodiment, the angle of the first angle A is fixed. In other embodiments, the first angle A can also be dynamically adjusted, that is, dynamically adjusted according to the distance between the diseased tissue and the tube body 1.

[0083] like Figure 2 and Figure 3 As shown, in a specific embodiment, the first emitting surface 22 and the second emitting surface 32 are planes, or the first emitting surface 22 and the second emitting surface 32 are arc surfaces that are concave in a direction away from the ultrasound window 12 .

[0084] The ultrasonic catheter provided by the present invention can narrow the focusing range of the ultrasonic element 2 by limiting the first emitting surface 22 to be a curved surface, so that the ultrasonic wave generates a greater sound pressure in the focusing range, so as to make the ultrasonic imaging image clearer. At the same time, by limiting the second emitting surface 32 to be a curved surface, the focusing range of the ablation element 3 can also be narrowed, so that the ultrasonic wave generates a greater sound pressure in the focusing range, so that the ablation power of the ablation element 3 on the diseased tissue is greater, thereby achieving a faster and more efficient ablation operation.

[0085] In a specific embodiment of the present invention, the first emitting surface 22 and the second emitting surface 32 are both cambered surfaces, and the curvature of the first emitting surface 22 is the same as the curvature of the second emitting surface 32. In other embodiments, the curvature of the first emitting surface 22 and the curvature of the second emitting surface 32 can also be dynamically adjusted according to the required sound pressure within the focusing range, or according to the required focusing range. Therefore, there is no specific limitation on the specific curvature of the first emitting surface 22 and the curvature of the second emitting surface 32 and whether the curvature of the first emitting surface 22 and the curvature of the second emitting surface 32 are the same.

[0086] In a specific embodiment of the present invention, the first emitting surface 22 can be a curved surface, and the second emitting surface 32 can be a plane. In another embodiment, the first emitting surface 22 can be a plane, and the second emitting surface 32 can be a curved surface. In another embodiment, both the first emitting surface 22 and the second emitting surface 32 can be planes, and there is no specific limitation on this.

[0087] like Figure 1 , Figure 4 and Figure 5 As shown, in a specific embodiment, the ablation element 3 has a first element 33 and a second element 34 that emit ultrasonic waves of different frequencies;

[0088] The ultrasonic wave emitted by the first element 33 is emitted from the ultrasonic window 12 and forms a first acoustic wave field 332 outside the tube body 1;

[0089] The ultrasonic wave emitted by the second element 34 is emitted from the ultrasonic window 12 and forms a second acoustic wave field 342 outside the tube body 1;

[0090] The first acoustic wave field 332 and the second acoustic wave field 342 have an overlapping field 5 , and the overlapping field 5 is used for ablating the diseased tissue.

[0091] The ultrasonic catheter provided by the present invention can treat the diseased tissue in the overlapped field 5 by using the ultrasonic waves of different working frequencies by providing the first element 33 and the second element 34 that emit ultrasonic waves of different frequencies. The treatment principle is as follows: if the diseased tissue is calcified tissue, the calcified structure can be cavitated by ultrasonic waves of different working frequencies, thereby causing the calcified tissue to generate a large number of bubbles, which expand and then burst rapidly, and the energy generated by the bursting can cause the calcified structure to break, thereby achieving the purpose of fragmentation treatment.

[0092] In this embodiment, the first element 33 and the second element 34 are both elements capable of emitting ultrasonic waves of different frequencies. The first element 33 and the second element 34 are arranged adjacent to each other. In other embodiments, the first element 33 and the second element 34 may also be arranged separately. There is no specific limitation on the positional arrangement relationship between the first element 33 and the second element 34.

[0093] In this embodiment, the transmitting end of the first element 33 is arranged toward the ultrasonic window 12, and the ultrasonic wave emitted by the first element 33 can be emitted from the ultrasonic window 12 to the outside of the tube body 1. The ultrasonic wave is focused on the emission path to form a first sound wave field 332.

[0094] The transmitting end of the second element 34 is arranged toward the same ultrasonic window 12 , and the ultrasonic wave emitted by the second element 34 can be emitted from the ultrasonic window 12 to the outside of the tube body 1 . The ultrasonic wave is focused on the emission path to form a second sound wave field 342 .

[0095] Among them, the first sound wave field 332 and the second sound wave field 342 have an overlapping overlapping field 5, that is, in the overlapping field 5, the ultrasonic wave emitted by the first element 33 and the ultrasonic wave emitted by the second element 34 produce a cavitation effect on the calcified structure, achieving a fragmentation treatment effect.

[0096] like Figure 1 , Figure 2 and Figure 4 As shown, in a specific embodiment, the overlapping field 5 is at least a part of the intersection field 4.

[0097] In this embodiment, the overlapping field 5 formed by the first acoustic wave field 332 and the second acoustic wave field 342 is a part of the intersection field 4 formed by the imaging field 21 and the ablation field 31, that is, in the overlapping field 5, the ultrasonic element 2 can clearly image the diseased tissue. At the same time, the ultrasonic wave emitted by the first element 33 and the ultrasonic wave emitted by the second element 34 can produce a cavitation effect on the calcified structure, thereby achieving the effect of fragmentation treatment.

[0098] In other embodiments, cavitation ablation points can be set in the imaging image based on the imaging image formed by the ultrasonic element 2 and in combination with the overlapping focal points of the ultrasound waves of the first element 33 and the second element 34, so as to achieve the effect of cavitation ablation by directly targeting the diseased tissue on the imaging image.

[0099] like Figure 1 , Figure 4 , Figure 5 and Fig.10 As shown, in a specific embodiment, the first element 33 and the second element 34 are arranged along the axial direction of the tube body 1, the first element 33 has a first sound wave surface 331 for emitting ultrasonic waves, and the second element 34 has a second sound wave surface 341 for emitting ultrasonic waves, and the first sound wave surface 331 and the second sound wave surface 341 are arranged at a second angle B.

[0100] In this embodiment, the first element 33 and the second element 34 are arranged along the axial direction of the tube body 1, wherein, in a specific embodiment, the ultrasonic element 2 can be arranged along the circumferential direction of the tube body 1 with the ablation element 3. In another embodiment, the ultrasonic element 2 can also be arranged between the first element 33 and the second element 34, that is, the first element 33, the ultrasonic element 2, and the second element 34 are arranged along the axial direction of the tube body 1, which can make the overlapping field 5 formed by the first acoustic wave field 332 and the second acoustic wave field 342 a part of the intersection field 4 formed by the imaging field 21 and the ablation field 31.

[0101] Furthermore, in this embodiment, the first element 33 has a first sound wave surface 331 for emitting ultrasonic waves, and the second element 34 has a second sound wave surface 341 for emitting ultrasonic waves, so that the first element 33 can emit ultrasonic waves through the first sound wave surface 331, and the second element 34 can emit ultrasonic waves of different frequencies through the second sound wave surface 341.

[0102] Furthermore, the first sound wave surface 331 and the second sound wave surface 341 are both arranged to face the ultrasonic window 12 , so that the ultrasonic waves emitted by the first element 33 and the second element 34 can be emitted from the ultrasonic window 12 to the outside of the tube body 1 .

[0103] Furthermore, there is a first angle A between the first sound wave surface 331 and the second sound wave surface 341, so that the extension direction of the ultrasonic wave emitted by the first element 33 and the extension direction of the ultrasonic wave emitted by the second element 34 are set at a second angle B, that is, the first sound wave field 332 and the second sound wave field 342 can have an overlapping overlap field 5.

[0104] like Figure 4 As shown, in a specific embodiment, the second angle B is greater than or equal to 120°, and the second angle B is less than or equal to 150°.

[0105] The ultrasonic catheter provided by the present invention can avoid the problem that the overlapping field 5 is too far away from the tube body 1 due to the second angle B being too large, and does not match the intersection field 4, resulting in the cavitable ablation field 31 being far away from the clearest area in the imaging field 21 of the ultrasonic element 2, and being unable to operate under the clearest viewing angle, affecting the cavitation ablation effect of the ultrasonic catheter; it can also avoid the problem that the cavitable area is far away from the clearest area in the imaging field 21 of the ultrasonic element 2 due to the second angle B being too small; in addition, it can also avoid the problem that the overlapping field 5 is too close to the tube body 1 due to the second angle B being too small, which in turn causes the ultrasonic catheter to be too close to the diseased tissue when operating inside the organism, and the ultrasonic catheter may rub and damage other healthy tissues of the organism, affecting the health of the organism.

[0106] In this embodiment, the second angle B can be any angle between 120° and 150°, for example, 130°. The second angle B can also be 120° or 150°. In this embodiment, the second angle B is fixed. In other embodiments, the second angle B can also be dynamically adjusted, that is, dynamically adjusted according to the distance between the diseased tissue and the tube body 1, or according to the imaging field 21 of the ultrasonic element 2.

[0107] like Figure 1 , Figure 7 , Figure 8 and Fig. 9 As shown, in a specific embodiment, the ultrasound window 12 is provided with a light-transmitting member 6 .

[0108] The ultrasound catheter provided by the present invention, by providing a light-transmitting member 6, can prevent the body fluid of the biological body from penetrating into the inner cavity 11 of the tube body 1 through the ultrasound window 12 when the ultrasound window 12 is an opening on the side of the tube body 1, causing the ultrasound element 2 and the ablation element 3 to be corroded by the body fluid, thereby causing equipment failure.

[0109] In this embodiment, the light-transmitting member 6 may be disposed to block the ultrasonic window 12 of the tube body 1 , and the material of the light-transmitting member 6 is not specifically limited.

[0110] In this embodiment, the ultrasonic window 12 is an opening on the circumference of the tube body 1 , one end opening of the ultrasonic window 12 corresponds to the external setting of the tube body 1 , and the other end opening of the ultrasonic window 12 corresponds to the inner cavity 11 setting of the tube body 1 , and the light-transmitting member 6 is formed at the ultrasonic window 12 .

[0111] like Figure 7 , Figure 8 and Fig. 9 As shown, in a specific embodiment, the light-transmitting member 6 is a concave lens that is concave toward the inner side of the tube body 1;

[0112] Or, the light-transmitting member 6 is a convex lens protruding toward the outside of the tube body 1;

[0113] Alternatively, the light-transmitting element 6 is a plane mirror.

[0114] The ultrasonic catheter provided by the present invention can flexibly adjust the light-transmitting component 6 according to the relationship between the sound velocity of the substance in the biological body and the sound velocity of the ultrasonic catheter material by using the light-transmitting component 6 as a convex lens, a concave lens or a plane mirror, so as to avoid the light-transmitting component 6 from defocusing the ultrasonic wave generated by the ultrasonic element 2, the ablation element 3, the first element 33 or the second element 34.

[0115] In this embodiment, when the sound velocity of the ultrasonic catheter material is greater than the sound velocity of the target medium in the organism, the light-transmitting member 6 is a concave lens concave toward the inner side of the tube body 1, and the curvature radius of the curvature of the light-transmitting member 6 is calculated as follows:

[0116]

[0117] Wherein, R is the radius of curvature, mm; F ​​is the distance between the overlapping field 5 / intersecting field 4 and the surface of the tube body 1, mm; C1 is the sound velocity of the ultrasonic catheter material, mm / s; C2 is the sound velocity of the target medium in the organism, mm / s.

[0118] In another embodiment, when the sound velocity of the ultrasonic catheter material is lower than the sound velocity of the target medium in the biological body, the light-transmitting member 6 is a convex lens protruding toward the outside of the tube body 1, and the curvature radius of the curvature of the light-transmitting member 6 is calculated as follows:

[0119]

[0120] Wherein, R is the radius of curvature, mm; F ​​is the distance between the overlapping field 5 / intersecting field 4 and the surface of the tube body 1, mm; C1 is the sound velocity of the ultrasonic catheter material, mm / s; C2 is the sound velocity of the target medium in the organism, mm / s.

[0121] In yet another embodiment, when the sound velocity of the ultrasonic catheter material is equal to the sound velocity of the target medium in the body, the light-transmitting element 6 is a plane mirror.

[0122] like Figure 1 As shown, in a specific embodiment, the ultrasonic element 2 and the ablation element 3 are arranged side by side along the axial direction of the tube body 1 , or the ultrasonic element 2 and the ablation element 3 are arranged side by side along the circumferential direction of the tube body 1 .

[0123] In this embodiment, the arrangement of the ultrasonic element 2 and the ablation element 3 is not specifically limited.

[0124] like Figure 1 , Figure 6 , Fig.10 and Fig.11As shown, in a specific embodiment, the ultrasonic element 2 is an array transducer, and the first element 33 and the second element 34 are both single-element transducers.

[0125] The ultrasonic catheter provided by the present invention uses an array transducer as the ultrasonic element 2, and can form a clear image through the ultrasonic waves released by the array transducer. By using a single-element transducer as the first element 33 or the second element 34, the ultrasonic waves of different frequencies released by the single-element transducer can be utilized to more efficiently realize the cavitation effect generated between different ultrasonic waves.

[0126] In this embodiment, a flexible circuit board 81 is provided in the inner cavity 11 of the ultrasonic catheter. The shape of the flexible circuit board 81 is adaptively adjusted according to the shape of the inner cavity 11 of the ultrasonic catheter. The array transducer and the single-element transducer are arranged on the flexible circuit board 81. In a specific embodiment, the array transducer is composed of two matching layers 71, a piezoelectric layer 72, and a backing layer 73 stacked up and down. The use of the multi-layer matching layer 71 can generate multi-resonance to broaden the bandwidth, which is beneficial to the transmission of sound energy. In another specific embodiment, the single-element transducer is composed of a matching layer 71, a piezoelectric layer 72, and a backing layer 73 stacked up and down. In other embodiments, there is no restriction on the composition structure of the array transducer and the single-element transducer.

[0127] In this embodiment, the array transducer is electrically connected by a plurality of array transducer leads 82 arranged in parallel on a flexible circuit board 81, and two single-element transducer leads 83 of different frequencies are respectively arranged on both sides of the plurality of array transducer leads 82, and the two leads of different frequencies are respectively electrically connected to the first element 33 and the second element 34; so that the array transducer and the single-element transducer can be integrated on the flexible circuit board 81.

[0128] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ultrasonic catheter, characterized in that: include: A tube body, wherein an inner cavity is provided inside the tube body, and an ultrasonic window is provided on the tube body; An ultrasonic element is disposed in the inner cavity, and the ultrasonic wave emitted by the ultrasonic element is emitted from the ultrasonic window and forms an imaging field outside the tube body; An ablation element is arranged in the inner cavity. The ultrasonic waves emitted by the ablation element are emitted from the ultrasonic window and form an ablation field outside the tube body. The imaging field and the ablation field have an overlapping intersection field, and the intersection field is used to image and ablate the diseased tissue.

2. The ultrasonic catheter according to claim 1, characterized in that The ultrasonic element has a first emitting surface for emitting ultrasonic waves, and the ablation element has a second emitting surface for emitting ultrasonic waves; The first emitting surface and the second emitting surface are both arranged to face the ultrasonic window, and a first angle is formed between the first emitting surface and the second emitting surface.

3. The ultrasonic catheter according to claim 2, characterized in that: The first angle is greater than or equal to 120°, and the first angle is less than or equal to 150°.

4. The ultrasonic catheter according to claim 2, characterized in that: The first emitting surface and the second emitting surface are planes, or the first emitting surface and the second emitting surface are arc surfaces that are concave in a direction away from the ultrasound window.

5. The ultrasonic catheter according to claim 2, characterized in that: The ablation element comprises a first element and a second element which emit ultrasonic waves of different frequencies; The ultrasonic wave emitted by the first element is emitted from the ultrasonic window and forms a first acoustic wave field outside the tube body; The ultrasonic wave emitted by the second element is emitted from the ultrasonic window and forms a second acoustic wave field outside the tube body; The first sound wave field and the second sound wave field have an overlapping field, and the overlapping field is used to ablate the diseased tissue.

6. The ultrasonic catheter according to claim 5, characterized in that The overlapping field is at least a portion of the intersecting field.

7. The ultrasonic catheter according to claim 5 or 6, characterized in that: The first element and the second element are arranged along the axial direction of the tube body. The first element has a first sound wave surface that emits ultrasonic waves, and the second element has a second sound wave surface that emits ultrasonic waves. The first sound wave surface and the second sound wave surface are arranged at a second angle.

8. The ultrasonic catheter according to claim 7, characterized in that: The second angle is greater than or equal to 120°, and the second angle is less than or equal to 150°.

9. The ultrasonic catheter according to claim 2, characterized in that: The ultrasound window is provided with a light-transmitting member.

10. The ultrasonic catheter according to claim 9, characterized in that The light-transmitting member is a concave lens concave inwardly of the tube body; Or, the light-transmitting member is a convex lens protruding toward the outside of the tube body; Alternatively, the light-transmitting element is a plane mirror.

11. The ultrasonic catheter according to claim 2, characterized in that: The ultrasonic element and the ablation element are arranged side by side along the axial direction of the tube body, or the ultrasonic element and the ablation element are arranged side by side along the circumferential direction of the tube body.

12. The ultrasonic catheter according to claim 5, characterized in that The ultrasonic element is an array transducer, and both the first element and the second element are single-element transducers.

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