Bending-adjustable ultrasonic recanalization catheter and ultrasonic recanalization catheter system

Abstract

The utility model provides an adjustable bend ultrasonic recanalization catheter and an ultrasonic recanalization catheter system, the adjustable bend ultrasonic recanalization catheter comprises a catheter body, a metal cap and a handle, the metal cap is connected with the far end of the catheter body, and the handle is connected with the near end of the catheter body; an ultrasonic transmission part and at least one traction wire are arranged in the tube body in a penetrating manner, the near end of the ultrasonic transmission part penetrates out of the near end of the handle to be connected with ultrasonic equipment, and the far end of the ultrasonic transmission part is connected with the metal cap so as to be used for transmitting ultrasonic mechanical energy generated by the ultrasonic equipment to the metal cap; the handle comprises a handle body and a bending adjusting mechanism arranged on the handle body, the near end of the traction wire is connected with the bending adjusting mechanism, the far end of the traction wire is connected with the metal cap, and the bending adjusting mechanism is used for pulling the traction wire so that the tube body can be bent in at least one direction. According to the utility model, bending adjustment of the tube body can be realized, so that ultrasonic vibration treatment can be carried out on vascular calcification lesion positions with extremely tortuous, narrow or multi-branch structures, and the purpose of opening blood vessels is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an adjustable curved ultrasonic recanalization catheter and an ultrasonic recanalization catheter system. Background Art

[0002] Vascular calcification is a disease of vascular stenosis and hardening caused by the accumulation of plaques in human blood vessels. The so-called plaques are composed of fibrous tissue, fat and calcium. The accumulated calcified plaques hinder the normal flow of blood, resulting in insufficient supply of oxygen and nutrients to the body. Vascular calcification occurs in peripheral blood vessels and causes lower limb arteriosclerosis, which can cause lower limb coldness, numbness and intermittent claudication in mild cases, and can weaken or disappear the pulsation of the lower limb arteries, especially the dorsalis pedis artery, and even require amputation. Vascular calcification occurs in the coronary arteries, and clinical manifestations include coronary atherosclerotic heart disease, myocardial ischemia, angina pectoris, and myocardial infarction.

[0003] At present, in the interventional treatment of vascular CTO complete occlusive lesions, the technical route used in the clinic is the guidewire passing technology. In the clinical treatment of vascular CTO occlusive lesions, the guidewire cannot directly pass through the hard calcified lesions, so it is necessary to pierce the intima of the vascular wall through the guidewire to enter the vascular wall media, and then reconstruct the blood supply pathway under the false lumen of the vascular wall intima through balloon dilatation and stent implantation to bypass the occlusive plaque in the blood vessel. However, this method causes greater damage to the vascular wall at the lesion site and has a high failure rate of surgery.

[0004] Based on this, a new technology has recently emerged - ultrasonic catheter recanalization technology, which can work directly in the true lumen of the blood vessel, convert electrical energy into mechanical energy through the ultrasonic transducer, and finally transmit the mechanical vibration energy to the catheter tip through the ultrasonic transmission element in the catheter, directly removing calcified tissue in the form of ultrasonic pulses to achieve blood vessel opening. Compared with the traditional guidewire passing technology, this technology does not need to pierce the intima of the blood vessel wall, avoiding damage to the blood vessel wall. While achieving the reconstruction of the vascular access, it also takes into account the maximum protection of the blood vessel wall at the original lesion site.

[0005] However, when existing ultrasonic recanalization catheters are used to treat complex vascular anatomical structures such as extremely tortuous, narrow or multi-branched blood vessels, it is difficult for ordinary ultrasonic recanalization catheters to reach the lesion site, which becomes a major problem that troubles surgeons.

[0006] It should be noted that the information disclosed in the background technology section of the utility model is only intended to deepen the understanding of the general background technology of the utility model, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0007] The purpose of the utility model is to provide an adjustable bend ultrasonic recanalization catheter and an ultrasonic recanalization catheter system, which can realize the adjustment of the bend of the tube body, so as to perform ultrasonic vibration treatment on the location of extremely tortuous, narrow or multi-branched vascular calcification lesions, thereby achieving the purpose of blood vessel opening.

[0008] In order to achieve the above-mentioned purpose, the utility model provides an adjustable bend ultrasonic recanalization catheter, comprising a tube body, a metal cap and a handle, wherein the metal cap is connected to the distal end of the tube body, and the handle is connected to the proximal end of the tube body; an ultrasonic transmission component and at least one traction wire are passed through the tube body, the proximal end of the ultrasonic transmission component passes through the proximal end of the handle to be connected to an ultrasonic device, and the distal end of the ultrasonic transmission component is connected to the metal cap to transmit the ultrasonic mechanical energy generated by the ultrasonic device to the metal cap; the handle comprises a handle body and a bending adjustment mechanism arranged on the handle body, the proximal end of the traction wire is connected to the bending adjustment mechanism, and the distal end of the traction wire is connected to the metal cap, and the bending adjustment mechanism is used to pull the traction wire so that the tube body can bend in at least one direction.

[0009] Optionally, the tube body includes an inner tube and an outer tube, the inner tube is located inside the outer tube, and there is a gap between the inner tube and the outer tube for passing the traction wire and the ultrasonic transmission component, the distal end of the outer tube and the distal end of the inner tube are fixedly connected to the metal cap, and the proximal end of the outer tube and the proximal end of the inner tube are fixedly connected to the handle body.

[0010] Optionally, a liquid inlet is provided on one side of the distal end of the handle body, and the liquid inlet is connected to the gap between the inner tube and the outer tube to transport the liquid to the metal cap and flow out through the liquid outlet hole on the metal cap.

[0011] Optionally, a guide wire port is provided on the other side of the distal end of the handle body, and the guide wire port is communicated with the inner cavity of the inner tube so as to be used for inserting a guide wire into the inner cavity of the inner tube.

[0012] Optionally, a groove is provided at the proximal end of the metal cap, and the distal end of the outer tube is fixed in the groove.

[0013] Optionally, the metal cap is provided with through holes penetrating through both axial ends thereof, and the distal end of the inner tube is fixed in the through holes.

[0014] Optionally, a first blind hole and a second blind hole are provided at the proximal end of the metal cap, the distal end of the ultrasonic transmission element is fixed in the first blind hole, the second blind hole is arranged in one-to-one correspondence with the traction wire, and the distal end of the traction wire is fixed in the second blind hole.

[0015] Optionally, two traction wires are passed through the tube body, and the bending adjustment mechanism includes a knob and two screws fixedly connected to the knob, the threads of the two screws have opposite rotation directions, the knob is rotatably connected to the handle body, the screw is disposed in the handle body, and each of the screws is wound with a traction wire.

[0016] Optionally, the handle body includes a first sub-handle body and a second sub-handle body, the proximal end of the tube body is fixedly connected to the first sub-handle body, the distal end of the knob is rotatably connected to the proximal end of the first sub-handle body, and the proximal end of the knob is rotatably connected to the distal end of the second sub-handle body.

[0017] In order to achieve the above-mentioned object, the utility model further provides an ultrasonic recanalization catheter system, comprising an ultrasonic device and any one of the above-mentioned adjustable bend ultrasonic recanalization catheters.

[0018] Compared with the prior art, the adjustable bend ultrasonic recanalization catheter and ultrasonic recanalization catheter system provided by the utility model have the following beneficial effects:

[0019] The utility model provides an adjustable bend ultrasonic recanalization catheter comprising a tube body, a metal cap and a handle, wherein the metal cap is connected to the distal end of the tube body, and the handle is connected to the proximal end of the tube body; an ultrasonic transmission component and at least one traction wire are passed through the tube body, the proximal end of the ultrasonic transmission component passes through the proximal end of the handle to be connected to an ultrasonic device, and the distal end of the ultrasonic transmission component is connected to the metal cap to transmit the ultrasonic mechanical energy generated by the ultrasonic device to the metal cap; the handle comprises a handle body and a bending adjustment mechanism arranged on the handle body, the proximal end of the traction wire is connected to the bending adjustment mechanism, and the distal end of the traction wire is connected to the metal cap, and the bending adjustment mechanism is used to pull the traction wire so that the tube body can bend in at least one direction. Therefore, the adjustable bend ultrasonic recanalization catheter provided by the utility model can shorten the traction wire along the length direction of the tube body by using a bending adjustment mechanism to pull the traction wire passed through the inside of the tube body, so that the tube body can be bent in a corresponding direction, and further the adjustable bend ultrasonic recanalization catheter can perform ultrasonic vibration treatment on the location of extremely tortuous, narrow or multi-branched vascular calcification lesions, thereby achieving the purpose of blood vessel opening, greatly shortening the operation time, and having a wider range of applications.

[0020] Since the ultrasonic recanalization catheter system provided by the utility model includes the adjustable bend ultrasonic recanalization catheter provided by the utility model, the ultrasonic recanalization catheter system provided by the utility model at least has all the beneficial effects of the adjustable bend ultrasonic recanalization catheter provided by the utility model. For details, please refer to the relevant descriptions above, so the beneficial effects of the ultrasonic recanalization catheter system provided by the utility model will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An overall cross-sectional view of an adjustable curved ultrasonic recanalization catheter provided by one embodiment of the utility model;

[0022] Figure 2 A sectional view of the distal end of an adjustable curved ultrasonic recanalization catheter provided in one embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the three-dimensional structure of a metal cap provided in one embodiment of the utility model;

[0024] Figure 4 A cross-sectional view of the proximal end of an adjustable bend ultrasonic recanalization catheter provided in one embodiment of the utility model.

[0025] The reference numerals are described as follows:

[0026] Tube body-100; inner tube-110; outer tube-120;

[0027] Metal cap-200; groove-210; through hole-220; first blind hole-230; second blind hole-240; liquid outlet hole-250;

[0028] Handle-300; handle body-310; first sub-handle body-311; liquid inlet-3111; guide wire port-3112; second sub-handle body-312; bending adjustment mechanism-320; knob-321; screw-322;

[0029] Ultrasonic transmission element-410, traction wire-420;

[0030] Ultrasonic equipment - 500;

[0031] Connector - 600. DETAILED DESCRIPTION

[0032] The following is a further detailed description of the adjustable curved ultrasonic recanalization catheter and ultrasonic recanalization catheter system proposed by the present invention in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and all use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purposes, features and advantages of the present invention more obvious and easy to understand, please refer to the drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Any modification of the structure, change of the proportional relationship or adjustment of the size, under the same or similar conditions as the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. The specific design features of the present invention disclosed herein include, for example, specific dimensions, directions, positions and shapes, which will be determined in part by the specific environment to be applied and used. And, in the embodiments described below, sometimes the same figure mark is used in common between different drawings to represent the same part or part with the same function, and its repeated description is omitted. In this specification, similar numbers and letters are used to represent similar items, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures. It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The singular forms "a", "an" and "the" include plural referents, the term "or" is generally used in a sense including "and / or", the term "several" is generally used in a sense including "at least one", the term "at least two" is generally used in a sense including "two or more", and the term "plurality" is generally used in a sense including "at least two".

[0033] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The purpose of the utility model is to provide an adjustable bend ultrasonic recanalization catheter and an ultrasonic recanalization catheter system, which can realize the bend adjustment of the tube body, so as to perform ultrasonic vibration treatment on the location of extremely tortuous, narrow or multi-branched vascular calcification lesions. It should be noted that, as can be understood by those skilled in the art, the "proximal end" referred to herein refers to the end close to the operator, and the "distal end" refers to the end away from the operator, that is, the end close to the lesion.

[0035] To achieve the above purpose, the utility model provides an adjustable curved ultrasonic recanalization catheter, please refer to Figure 1 , which is an overall cross-sectional view of an adjustable curved ultrasonic recanalization catheter provided by an embodiment of the utility model. Figure 1As shown, the adjustable bend ultrasonic recanalization catheter provided by the utility model comprises a tube body 100, a metal cap 200 and a handle 300, wherein the metal cap 200 is connected to the distal end of the tube body 100, and the handle 300 is connected to the proximal end of the tube body 100; an ultrasonic transmission member 410 and at least one traction wire 420 are inserted into the tube body 100, the proximal end of the ultrasonic transmission member 410 passes through the proximal end of the handle 300 to be connected to the ultrasonic device 500, and the distal end of the ultrasonic transmission member 410 is connected to the metal cap 200. The handle 300 comprises a handle body 310 and a bending adjustment mechanism 320 disposed on the handle body 310, the proximal end of the traction wire 420 is connected to the bending adjustment mechanism 320, the distal end of the traction wire 420 is connected to the metal cap 200, and the bending adjustment mechanism 320 is used to pull the traction wire 420 so that the tube body 100 can bend in at least one direction.

[0036] Therefore, the adjustable bend ultrasonic recanalization catheter provided by the utility model can shorten the traction wire 420 along the length direction of the tube body 100 by using the bending adjustment mechanism 320 to pull the traction wire 420 passed through the inside of the tube body 100, so that the tube body 100 can be bent in the corresponding direction, and further the adjustable bend ultrasonic recanalization catheter can perform ultrasonic vibration treatment on the extremely tortuous, narrow or multi-branched vascular calcification lesions, thereby achieving the purpose of blood vessel opening, greatly shortening the operation time, and having a wider range of applications.

[0037] It should be noted that, as can be understood by those skilled in the art, when multiple traction wires 420 are inserted into the tube body 100, the tube body 100 can be bent in different directions by pulling different traction wires 420 through the bending adjustment mechanism 320. It should also be noted that, as can be understood by those skilled in the art, the bending adjustment mechanism 320 can also be used to release the traction wires 420 so that the tube body 100 can be restored to its original shape.

[0038] Specifically, the ultrasonic device 500 includes an ultrasonic generator and an ultrasonic transducer connected to each other, wherein the ultrasonic generator is used to provide a high-frequency alternating current signal to the ultrasonic transducer, and the ultrasonic transducer is used to convert the high-frequency alternating current signal into ultrasonic mechanical energy, and the proximal end of the ultrasonic transmission element 410 is connected to the ultrasonic transducer. Thus, the ultrasonic mechanical energy generated by the ultrasonic transducer can be transmitted to the metal cap 200 through the ultrasonic transmission element 410, so that the metal cap 200 can vibrate, thereby removing calcified tissue and achieving blood vessel opening. Further, since the ultrasonic transmission element 410 needs to have flexibility, bending resistance, support and elasticity, and the influence of temperature on the material of the ultrasonic transmission element 410 needs to be considered, the material of the ultrasonic transmission element 410 can be selected from shape memory alloys, which have superelasticity in the martensite state and lose elasticity after being transformed into austenite. Specifically, the material of the ultrasonic transmission element 410 can be selected from one or more of titanium, nickel-titanium alloy, etc.

[0039] Furthermore, the material of the metal cap 200 can be selected from one or more of titanium, titanium alloy, stainless steel, tungsten steel, aluminum alloy, etc. Therefore, by selecting one or more of titanium, titanium alloy, stainless steel, tungsten steel, aluminum alloy, etc. to make the metal cap, not only can the metal cap 200 have a certain strength and corrosion resistance, but also can ensure that the metal cap 200 has good biocompatibility.

[0040] Furthermore, the material of the traction wire 420 is a metal material such as stainless steel. Therefore, by using a metal material such as stainless steel to make the traction wire 420, it can be ensured that the traction wire 420 still has a strong strength when it is small in size, and effectively prevent the traction wire 420 from breaking during the process of being pulled by the bending adjustment mechanism 320. It should be noted that, as can be understood by those skilled in the art, the material of the traction wire 420 can also be other metal materials with certain strength and corrosion resistance other than stainless steel, which can be selected according to actual needs, and the utility model does not limit this.

[0041] In some exemplary embodiments, the diameter of the ultrasonic transmission element 410 gradually increases from its distal end to its proximal end. Thus, by setting the ultrasonic transmission element 410 as a variable diameter structure with a thin distal end and a thick proximal end, it is not only easy to vibrate the metal cap 200, but also can increase the overall strength of the ultrasonic catheter.

[0042] Please continue to refer to Figure 1 ,like Figure 1As shown, in some exemplary embodiments, the tube body 100 includes an inner tube 110 and an outer tube 120, the inner tube 110 is located inside the outer tube 120, there is a gap between the inner tube 110 and the outer tube 120 for passing the traction wire 420 and the ultrasonic transmission member 410, the distal end of the outer tube 120 and the distal end of the inner tube 110 are both fixedly connected to the metal cap 200, and the proximal end of the outer tube 120 and the proximal end of the inner tube 110 are both fixedly connected to the handle body 310. Therefore, by setting the tube body 100 to include the outer tube 120 and the inner tube 110 located inside the outer tube 120, not only can a passage be provided for the traction wire 420 and the ultrasonic transmission member 410, but also the tube body 100 can be ensured to have good flexibility, passability and sealing properties.

[0043] In some exemplary embodiments, the outer tube 120 is a single-cavity multi-layer structure. Thus, by setting the outer tube 120 as a single-cavity multi-layer structure, it can be effectively ensured that the outer tube 120 has good flexibility, permeability and sealing performance.

[0044] Furthermore, the outer tube 120 can be a single-lumen three-layer structure. Specifically, the outer tube 120 includes an outer layer, an intermediate layer and an inner layer, wherein the outer layer is made of PEBAX (nylon elastomer). Since PEBAX (nylon elastomer) has good elasticity and bending properties, it is beneficial for the tube body 100 to bend and reach the target tissue area. The intermediate layer is a stainless steel braided mesh tube. Since the stainless steel braided mesh tube has high strength and good wear resistance, it is beneficial for improving the overall strength and wear resistance of the tube body 100. The inner layer is made of polytetrafluoroethylene (PTFE). Since polytetrafluoroethylene (PTFE) has good sealing properties, it is beneficial for improving the overall sealing properties of the tube body 100 and effectively preventing tissue fluid in the target tissue area from entering the inside of the tube body 100. It should be noted that, as can be understood by those skilled in the art, the outer layer of the outer tube 120 can also be made of other materials with certain elasticity and bending properties other than PEBAX (nylon elastomer), the middle layer of the outer tube 120 can also be other pipes with certain strength and wear resistance other than stainless steel braided mesh pipes, and the inner layer of the outer tube 120 can also be made of other materials with certain sealing properties other than polytetrafluoroethylene (PTFE).

[0045] Please continue to refer to Figure 2 , which is a cross-sectional view of the distal end of an adjustable curved ultrasonic recanalization catheter provided by an embodiment of the utility model. Figure 2As shown, in some exemplary embodiments, the proximal end of the metal cap 200 is provided with a groove 210, and the distal end of the outer tube 120 is fixed in the groove 210. Therefore, by providing the groove 210 at the proximal end of the metal cap 200, the groove 210 can provide a fixing position for the outer tube 120, thereby making it easier to achieve a fixed connection between the outer tube 120 and the metal cap 200. Specifically, the distal end of the outer tube 120 can be fixed in the groove 210 by gluing, hot air welding, etc.

[0046] Please continue to refer to Figure 2 ,like Figure 2 As shown, in some exemplary embodiments, the metal cap 200 is provided with a through hole 220 that runs through both ends of the metal cap 200 in the axial direction, and the distal end of the inner tube 110 is fixed in the through hole 220. Therefore, by providing the through hole 220 that runs through both ends of the metal cap 200 in the axial direction, the through hole 220 can provide a fixing position for the inner tube 110, thereby making it easier to achieve a fixed connection between the inner tube 110 and the metal cap 200. Specifically, the distal end of the inner tube 110 can be fixed in the through hole 220 by, but not limited to, gluing, hot air welding, and the like.

[0047] Please continue to refer to Figure 2 ,like Figure 2 As shown, the proximal end of the metal cap 200 is provided with a first blind hole 230 and a second blind hole 240, both of which penetrate the bottom of the groove 210 to communicate with the groove 210, and the distal end of the ultrasonic transmission member 410 is fixed in the first blind hole 230, and the second blind hole 240 is arranged in a one-to-one correspondence with the traction wire 420, and the distal end of the traction wire 420 is fixed in the second blind hole 240. Therefore, by providing the first blind hole 230 at the proximal end of the metal cap 200, the first blind hole 230 can provide a fixing position for the ultrasonic transmission member 410, so as to facilitate the fixed connection between the ultrasonic transmission member 410 and the metal cap 200. Specifically, the distal end of the ultrasonic transmission member 410 can be fixed in the first blind hole 230 by, but not limited to, laser welding, capacitor welding, resistance welding, etc. By providing at least one second blind hole 240 corresponding to the traction wire 420 at the proximal end of the metal cap 200, the traction wire 420 can be provided with a fixing position through the second blind hole 240, so as to more easily realize the fixed connection between the traction wire 420 and the metal cap 200. Specifically, the distal end of the traction wire 420 can be fixed in the corresponding second blind hole 240 by means of, but not limited to, laser welding, resistance welding, etc.

[0048] Please continue to refer to Figure 1,like Figure 1 As shown, in some exemplary embodiments, a liquid inlet 3111 is provided at one side of the distal end of the handle body 310, and the liquid inlet 3111 is connected to the gap between the inner tube 110 and the outer tube 120, so as to transport the liquid to the metal cap 200 and pass the liquid outlet hole 250 (see Figure 3 , which is a three-dimensional structural schematic diagram of the metal cap 200 provided by one embodiment of the utility model. Thus, by setting a liquid inlet 3111 connected to the gap between the inner tube 110 and the outer tube 120 on one side of the distal end of the handle body 310, liquid (such as saline) can be transported to the metal cap 200 through the liquid inlet 3111 and the tube body 100. When the ultrasonic generator is turned on, the high-frequency alternating current signal generated is converted into high-frequency vibration by the ultrasonic transducer, and the high-frequency vibration is transmitted to the metal cap 200 through the ultrasonic transmission element 410. During the high-frequency vibration of the metal cap 200, the liquid (such as saline) flowing out through the liquid outlet 250 on the metal cap 200 will generate microbubbles and expand and implode at the distal end of the metal cap 200, thereby generating mechanical energy to ablate the calcified tissue. When the calcified tissue is removed, the ultrasonic generator is turned off first, and then the liquid (such as saline) is stopped from being perfused into the liquid inlet 3111.

[0049] Please continue to refer to Figure 1 ,like Figure 1 As shown, in some exemplary embodiments, a guide wire port 3112 is provided at the other side of the distal end of the handle body 310, and the guide wire port 3112 is connected to the inner cavity of the inner tube 110, so as to be used to pass a guide wire into the inner cavity of the inner tube 110. Thus, by providing the guide wire port 3112 connected to the inner cavity of the inner tube 110 at the distal end of the handle body 310, it is more convenient to pass a guide wire into the inner cavity of the inner tube 110 through the guide wire port 3112, and at the same time, it is also more convenient to withdraw the guide wire in the inner cavity of the inner tube 110 through the guide wire port 3112. In addition, by providing the guide wire port 3112 on different sides of the liquid inlet 3111, it is more convenient for the operator to operate.

[0050] Please continue to refer to Figure 3 ,like Figure 3 As shown, in some exemplary embodiments, the distal end of the metal cap 200 is set in a conical shape. Therefore, by setting the distal end of the metal cap 200 to a conical structure, not only can the metal cap 200 be more easily inserted into a tortuous and narrow blood vessel, and has a wider range of applications, but also the metal cap 200 can be more easily inserted into calcified tissue, so that the calcified tissue can be removed more easily.

[0051] Please continue to refer to Figure 4 , which is a cross-sectional view of the proximal end of an adjustable curved ultrasonic recanalization catheter provided by an embodiment of the utility model. Figure 4 As shown, in some exemplary embodiments, two traction wires 420 are inserted into the tube body 100, and the bending adjustment mechanism 320 includes a knob 321 and two screws 322 fixedly connected to the knob 321, and the thread rotation directions of the two screws 322 are opposite (the thread rotation direction of one screw 322 is clockwise, and the thread rotation direction of the other screw 322 is counterclockwise), the knob 321 is rotatably connected to the handle body 310, and the screw 322 is disposed in the handle body 310, and each of the screws 322 is respectively wound with one traction wire 420. Specifically, the traction wire 420 is spirally wound on the screw 322 along the thread rotation direction of the screw 322. When the knob 321 is rotated clockwise, the two screws 322 are driven to rotate clockwise together, so that the traction wire 420 wound on the screw 322 with a clockwise spiral direction can be pulled, and the traction wire 420 is shortened along the length direction of the tube body 100, and the traction wire 420 wound on the screw 322 with a counterclockwise spiral direction is released, and the traction wire 420 is extended along the length direction of the tube body 100, so that the distal end of the tube body 100 is bent toward the direction of the traction wire 420 on the pulled side. On this basis, continuing to rotate the knob 321 clockwise will increase the degree of bending of the distal end of the tube body 100. On this basis, when the knob 321 is rotated counterclockwise, the two screws 322 are driven to rotate counterclockwise together, so that the traction wire 420 wound on the screw 322 with a counterclockwise spiral direction is pulled, and the traction wire 420 is shortened along the length direction of the tube body 100, and the traction wire 420 wound on the screw 322 with a clockwise spiral direction is released, and the traction wire 420 is extended along the length direction of the tube body 100, so that the distal end of the tube body 100 can be restored to the original straight state. After the distal end of the tube body 100 is restored to the original straight state, if the knob 321 is continued to be rotated counterclockwise, the traction wire 420 wound on the screw 322 with a counterclockwise spiral direction will be further pulled, and the traction wire 420 wound on the screw 322 with a clockwise spiral direction will be further released, so that the distal end of the tube body 100 can be bent in another direction.

[0052] Please continue to refer to Figure 4 ,like Figure 4 As shown, in some exemplary embodiments, the screw rod 322 is fixedly connected to the knob 321 by a threaded connection. Thus, the threaded connection can more easily achieve a fixed connection between the screw rod 322 and the knob 321.

[0053] Please continue to refer to Figure 1 ,like Figure 1 As shown, in some exemplary embodiments, the handle body 310 includes a first sub-handle body 311 and a second sub-handle body 312, the proximal end of the tube body 100 is fixedly connected to the first sub-handle body 311, the distal end of the knob 321 is rotatably connected to the proximal end of the first sub-handle body 311, and the proximal end of the knob 321 is rotatably connected to the distal end of the second sub-handle body 312. Thus, by configuring the handle body 310 to have a structure of a first sub-handle body 311 and a second sub-handle body 312 that are separately configured, the installation of the bending adjustment mechanism 320 can be more convenient.

[0054] Please continue to refer to Figure 4 ,like Figure 4 As shown, in some exemplary embodiments, the adjustable bend ultrasonic recanalization catheter provided by the utility model further includes a joint 600, which is connected to the proximal end of the handle 300, and the joint 600 is used to connect the ultrasonic transmission element 410 to the ultrasonic device 500. Therefore, by providing the joint 600 at the proximal end of the handle 300, the connection between the ultrasonic transmission element 410 and the ultrasonic device 500 can be more conveniently achieved.

[0055] The present invention also provides an ultrasonic recanalization catheter system, which includes an ultrasonic device 500 and the above-mentioned adjustable ultrasonic recanalization catheter. Since the ultrasonic recanalization catheter system provided by the present invention includes the adjustable ultrasonic recanalization catheter provided by the present invention, the ultrasonic recanalization catheter system improved by the present invention at least has all the beneficial effects of the adjustable ultrasonic recanalization catheter provided by the present invention. For details, please refer to the relevant description above, so the beneficial effects of the ultrasonic recanalization catheter system provided by the present invention will not be repeated here.

[0056] Specifically, the ultrasonic device 500 includes an ultrasonic generator and an ultrasonic transducer connected to each other, wherein the ultrasonic generator is used to provide a high-frequency alternating current signal to the ultrasonic transducer, and the ultrasonic transducer is used to convert the high-frequency alternating current signal into ultrasonic mechanical energy. It should be noted that, as can be understood by those skilled in the art, the specific working principles of the ultrasonic generator and the ultrasonic transducer can refer to the relevant technologies known to those skilled in the art, and will not be described one by one here.

[0057] In summary, compared with the prior art, the adjustable bend ultrasonic recanalization catheter and ultrasonic recanalization catheter system provided by the utility model have the following beneficial effects:

[0058] The utility model uses a bending adjustment mechanism 320 to pull the traction wire 420 inserted into the tube body 100, so that the traction wire 420 can be shortened along the length direction of the tube body 100, so that the tube body 100 can be bent in the corresponding direction, and then the ultrasonic recanalization catheter can perform ultrasonic vibration treatment on the location of extremely tortuous, narrow or multi-branched vascular calcification lesions, achieve the purpose of blood vessel opening, greatly shorten the operation time, and have a wider range of applications. Furthermore, by inserting multiple traction wires 420 into the tube body 100 and pulling different traction wires 420 through the bending adjustment mechanism 320, the tube body 100 can be bent in different directions.

[0059] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0060] It should also be noted that the above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure content belong to the protection scope of the utility model. Obviously, technicians in this field can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations fall within the scope of the utility model and its equivalent technology, the utility model is also intended to include these modifications and variations.

Claims

1. An adjustable curved ultrasonic recanalization catheter, characterized in that: It comprises a tube body, a metal cap and a handle, wherein the metal cap is connected to the distal end of the tube body, and the handle is connected to the proximal end of the tube body; An ultrasonic transmission member and at least one traction wire are inserted into the tube body, the proximal end of the ultrasonic transmission member passes through the proximal end of the handle to be connected to the ultrasonic device, and the distal end of the ultrasonic transmission member is connected to the metal cap to transmit the ultrasonic mechanical energy generated by the ultrasonic device to the metal cap; The handle includes a handle body and a bending adjustment mechanism arranged on the handle body, the proximal end of the traction wire is connected to the bending adjustment mechanism, the distal end of the traction wire is connected to the metal cap, and the bending adjustment mechanism is used to pull the traction wire so that the tube body can bend in at least one direction.

2. The adjustable bend ultrasonic recanalization catheter according to claim 1, characterized in that: The tube body includes an inner tube and an outer tube, the inner tube is located inside the outer tube, and there is a gap between the inner tube and the outer tube for passing the traction wire and the ultrasonic transmission component. The distal end of the outer tube and the distal end of the inner tube are fixedly connected to the metal cap, and the proximal end of the outer tube and the proximal end of the inner tube are fixedly connected to the handle body.

3. The adjustable bend ultrasonic recanalization catheter according to claim 2, characterized in that: A liquid inlet is provided on one side of the distal end of the handle body, and the liquid inlet is communicated with the gap between the inner tube and the outer tube so as to transport the liquid to the metal cap and flow out through the liquid outlet hole on the metal cap.

4. The adjustable bend ultrasonic recanalization catheter according to claim 2, characterized in that: A guide wire port is provided on the other side of the distal end of the handle body, and the guide wire port is communicated with the inner cavity of the inner tube so as to be used for inserting a guide wire into the inner cavity of the inner tube.

5. The adjustable bend ultrasonic recanalization catheter according to claim 2, characterized in that: The proximal end of the metal cap is provided with a groove, and the distal end of the outer tube is fixed in the groove.

6. The adjustable bend ultrasonic recanalization catheter according to claim 2, characterized in that: The metal cap is provided with through holes penetrating through the two axial ends thereof, and the distal end of the inner tube is fixed in the through holes.

7. The adjustable bend ultrasonic recanalization catheter according to claim 1, characterized in that: The proximal end of the metal cap is provided with a first blind hole and a second blind hole, the distal end of the ultrasonic transmission element is fixed in the first blind hole, the second blind hole is arranged in one-to-one correspondence with the traction wire, and the distal end of the traction wire is fixed in the second blind hole.

8. The adjustable bend ultrasonic recanalization catheter according to any one of claims 1 to 7, characterized in that: Two traction wires are passed through the tube body, and the bending adjustment mechanism includes a knob and two screws fixedly connected to the knob. The threads of the two screws have opposite rotation directions. The knob is rotatably connected to the handle body. The screw is arranged in the handle body, and each of the screws is wound with a traction wire.

9. The adjustable bend ultrasonic recanalization catheter according to claim 8, characterized in that: The handle body includes a first sub-handle body and a second sub-handle body. The proximal end of the tube body is fixedly connected to the first sub-handle body, the distal end of the knob is rotatably connected to the proximal end of the first sub-handle body, and the proximal end of the knob is rotatably connected to the distal end of the second sub-handle body.

10. An ultrasonic recanalization catheter system, characterized in that: The invention comprises an ultrasonic device and the adjustable bend ultrasonic recanalization catheter according to any one of claims 1 to 9.

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