Delivery catheter and delivery system

Abstract

The utility model relates to a conveying catheter and a conveying system. The conveying catheter comprises a deformation pipe, a first connecting pipe and a second connecting pipe, the shape memory component is arranged in the deformation tube and extends to the far end of the deformation tube, and the shape memory component can be bent and deformed; and the induction part is arranged in the shape memory part, and the induction part can activate the shape memory function of the shape memory part under the control of an induction device of the conveying system, so that the shape memory part drives the deformation pipe to bend. In this way, the induction part can control the shape memory part to have the shape memory function after being activated under control. When the far end of the catheter to be conveyed reaches the bifurcated blood vessel or the angulated blood vessel, the sensing part is controlled by the sensing device in vitro to activate the shape memory function of the shape memory part, so that the far end of the conveying catheter can be bent, the conveying catheter can conveniently pass through the angulated blood vessel or the bifurcated blood vessel, the supporting performance on a guide wire is further enhanced, and surgical operation is facilitated; the operation success rate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a delivery catheter and a delivery system. Background Art

[0002] Percutaneous coronary intervention (PCI) is mainly used to treat obstructive coronary artery disease. It has developed rapidly due to its advantages of being minimally invasive, time-saving, safe and efficient. PCI has a high surgical success rate and good therapeutic effect for left main lesions, chronic total occlusion (CTO) lesions, and severe calcified lesions. As catheters suitable for performing various functions in peripheral and coronary vessels, such as microcatheters, guide catheters, double-lumen microcatheters, and extension catheters, their own penetrability and support for the guidewire play a vital role in the success of the operation.

[0003] During treatment, the distal end of the catheter is pushed to the lesion site, and then the guide wire is pushed through the catheter to the lesion site and treatment is performed at the lesion site. At present, most of the catheter products used in various PCI surgeries are straight structures, and the distal end is usually designed with a softer material. Although it has better tracking properties in blood vessels, it is limited by the hollow structure of the catheter itself and cannot achieve pre-plasticity like a guide wire. In clinical use, it is difficult for the catheter to pass through angled and bifurcated vascular lesions. Even if it passes through the tortuous section, due to its own straight structure, it does not provide sufficient support for the guide wire at the bifurcation, and the guide wire cannot pass through the lesion, causing the operation to fail. Summary of the invention

[0004] Based on this, it is necessary to provide a delivery catheter and a delivery system to address the problem that the distal end of the current catheter cannot be bent, resulting in its inability to pass through angled vessels or diseased vessels. When encountering an angled vessel or a bifurcated vessel, the shape memory function of the distal end of the delivery catheter can be activated, so that the distal end of the delivery catheter can be bent, which facilitates the delivery catheter to pass through the angled vessel or the bifurcated vessel, and enhances the support of the distal end of the delivery catheter to the guide wire at the angled vessel or the bifurcated vessel, so that the guide wire can pass through the angled vessel or the bifurcated vessel smoothly, thereby facilitating surgical operations and improving the success rate of the operation.

[0005] A delivery catheter, comprising:

[0006] The deformable tube is hollow;

[0007] a shape memory component, disposed in the deformation tube and extending to the distal end of the deformation tube, wherein the shape memory component can be bent and deformed; and

[0008] The induction component is arranged in the shape memory component. Under the control of the induction device of the conveying system, the induction component can activate the shape memory function of the shape memory component so that the shape memory component drives the bending of the deformation tube.

[0009] In one embodiment of the present application, the deformable tube includes an inner tube, an intermediate layer and an outer tube, the outer tube is sleeved on the inner tube, and the intermediate layer is arranged between the inner tube and the outer tube.

[0010] In one embodiment of the present application, the shape memory component is disposed in the wall of the outer tube;

[0011] The shape memory component is in the shape of a bar, a column or a tube.

[0012] In one embodiment of the present application, the outer tube and the shape memory component are formed by hot melting, embedding or injection molding.

[0013] In one embodiment of the present application, there are multiple shape memory components, and the multiple shape memory components are arranged at intervals along the circumference of the outer tube, and / or the multiple shape memory components are arranged along the axial direction of the outer tube.

[0014] In one embodiment of the present application, the shape memory component and the stainless steel wire are formed into a braided wire; and the middle layer is formed by braiding the braided wire.

[0015] In one embodiment of the present application, the shape memory component and the induction component are integrally formed, so that the induction component is distributed in the shape memory component.

[0016] In one embodiment of the present application, the induction component is a magnetic component, an inductive component or a temperature sensing component.

[0017] In one embodiment of the present application, the length of the deformation tube ranges from 100 mm to 300 mm.

[0018] In one embodiment of the present application, the delivery catheter further comprises a guide tube, which is conically arranged and disposed at the distal end of the deformable tube;

[0019] The delivery catheter further comprises a support tube, and the deformation tube is arranged at the distal end of the support tube.

[0020] A delivery system comprises a sensing device, a guide wire and a delivery catheter as described in any of the above technical features, wherein the sensing device can activate the shape memory function of the shape memory component in the delivery catheter, and the guide wire is delivered to the lesion site through the delivery catheter.

[0021] In one embodiment of the present application, the induction device is a magnetic field generator, and the induction component in the delivery catheter is a magnetic component;

[0022] The magnetic member activates the shape memory function of the shape memory component under the action of the magnetic field.

[0023] In one embodiment of the present application, the magnetic field generator includes an adjustment knob, a plurality of adjustment gears and a grip portion, the grip portion is arranged on the adjustment knob, the plurality of adjustment gears are arranged at intervals, and the adjustment knob can move to correspond to different adjustment gears to indicate the magnetic field strength.

[0024] In one embodiment of the present application, the induction device is an electric field generator, and the induction component in the delivery catheter is an inductor; or, the induction device is a temperature regulator, and the induction component in the delivery catheter is a temperature sensor.

[0025] After adopting the above technical solution, this application has at least the following technical effects:

[0026] The delivery catheter and delivery system of the present application, in which the deformation tube is a hollow tubular structure, the shape memory component is arranged in the deformation tube and extends to the distal end of the deformation tube along the axial direction of the deformation tube, and the sensing component is arranged on the shape memory component. When the distal end of the delivery catheter encounters an angled blood vessel or a bifurcated blood vessel in the blood vessel, the sensing device of the delivery system can control the sensing component to activate the memory function of the shape memory component, so that the shape memory component can bend, and then when the shape memory component bends, it can drive the deformation tube to bend, so that the distal end of the delivery catheter can pass through the angled blood vessel or the bifurcated blood vessel. When the delivery catheter is withdrawn, the shape memory function of the shape memory component is lost, so that the deformation tube becomes straight, so that the delivery catheter can be withdrawn from the human body.

[0027] The delivery catheter has a shape memory component added to the deformable catheter, and a sensing component added to the shape memory component. The shape memory component has a shape memory function, and the sensing component can control the shape memory component to have a shape memory function after being activated under control. At this time, the deformable tube can bend according to the activation conditions, and after the sensing device is removed, the deformable tube is in a linear state. The delivery catheter maintains its linear state during the process of passing through a conventional blood vessel. When the distal end of the delivery catheter reaches a bifurcated blood vessel or an angled blood vessel, the sensing component is controlled by a sensing device in vitro to activate the shape memory function of the shape memory component, so that the distal end of the delivery catheter can be bent, which is convenient for the delivery catheter to pass through the angled blood vessel or the bifurcated blood vessel, and further enhances the support of the distal end of the delivery catheter to the guide wire at the angled blood vessel or the bifurcated blood vessel, so that the guide wire can smoothly pass through the angled blood vessel or the bifurcated blood vessel, reducing the pain of the patient, facilitating the operation, and improving the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a delivery catheter passing through a blood vessel according to an embodiment of the present application.

[0029] Figure 2 for Figure 1 Schematic diagram of a delivery catheter passing through a bifurcated vessel is shown.

[0030] Figure 3 for Figure 1 A schematic longitudinal section diagram of the delivery catheter is shown.

[0031] Figure 4 for Figure 3 The middle layer shown corresponds to a schematic diagram of the outside of the blood vessel.

[0032] Figure 5 for Figure 3 The middle layer shown corresponds to a schematic diagram of the inner side of the blood vessel.

[0033] Figure 6 for Figure 2 Schematic diagram of the magnetic field generator shown.

[0034] Among them: 100, delivery catheter; 110, deformation tube; 111, inner tube; 112, middle layer; 113, outer tube; 120, shape memory component; 130, guide tube; 140, developing ring; 150, support tube; 200, sensing device; 210, adjustment knob; 220, grip; 230, adjustment gear; 300, angled blood vessel; 400, guide wire. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If 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. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0041] See also Figure 1 and Figure 2 The present application provides a novel delivery catheter 100. The delivery catheter 100 is applied to a delivery system. After the delivery catheter 100 is pushed to the lesion site, the distal end of the guide wire 400 extends out of the delivery catheter 100 and extends into the lesion site to treat the lesion blood vessel at the lesion site. Figure 1This is a schematic diagram of a delivery catheter 100 passing through a blood vessel according to an embodiment of the present application. Figure 2 for Figure 1 The schematic diagram of the delivery catheter 100 passing through the bifurcated blood vessel is shown. It is worth noting that the diameter size of the delivery catheter 100 can be designed according to the diameter size of the diseased blood vessel at the lesion location. Exemplarily, the delivery catheter 100 is a microcatheter. Of course, in other embodiments of the present application, the diameter size of the delivery catheter 100 can also be larger than the diameter size of the microcatheter.

[0042] In this application, only the example of the delivery catheter 100 moving in the blood vessel and passing through the angled blood vessel 300 is used for explanation. The delivery catheter 100 passing through the bifurcated blood vessel or other types of blood vessels such as tortuous blood vessels will not be described in detail. In addition, the delivery catheter 100 is guided by the guide catheter, which is inserted into the entrance of the coronary artery in the body. The delivery catheter 100 passes through the guide catheter and extends into the blood vessel, and moves to the lesion position in the blood vessel. The delivery power of the delivery catheter 100 is realized by the operating handle or the catheter pushing device, which is a prior art and will not be described in detail here.

[0043] It is understandable that the catheters currently used in various PCI surgeries are limited by the hollow structure of the catheter itself and cannot achieve pre-plasticity like a guidewire. In clinical use, it is very difficult for the catheter to pass through angled and bifurcated vascular lesions. Even if it passes through the tortuous section, due to its own straight structure, it does not provide sufficient support for the guidewire at the bifurcation, and the guidewire cannot pass through the lesion, causing the operation to fail. To this end, the present application provides a new type of delivery catheter 100, which, when encountering an angled vessel 300, activates the distal shape memory function of the delivery catheter 100, so that the distal end of the delivery catheter 100 can be bent, which facilitates the delivery catheter 100 to pass through the angled vessel 300, enhances the support of the distal end of the delivery catheter 100 for the guidewire 400 at the angled vessel 300, and enables the guidewire 400 to pass through the angled vessel 300 smoothly, which is convenient for surgical operations and improves the success rate of the operation. The specific structure of the delivery catheter 100 of an embodiment is introduced below.

[0044] See also Figures 1 to 3 In one embodiment, the delivery catheter 100 includes a deformable tube 110, a shape memory component 120, and a sensing component. The deformable tube 110 is hollow, the shape memory component 120 is disposed in the deformable tube 110 and extends to the distal end of the deformable tube 110, the shape memory component 120 can be bent and deformed, and the sensing component is disposed in the shape memory component 120. Under the control of the sensing device 200 of the delivery system, the sensing component can activate the shape memory function of the shape memory component 120, so that the shape memory component 120 drives the bending of the deformable tube 110. Figure 3 for Figure 1 A schematic longitudinal cross-sectional view of the delivery catheter 100 is shown.

[0045] The deformable tube 110 has a proximal end and a distal end that are relatively arranged. The proximal end refers to the end close to the operator, and the distal end refers to the end away from the operator. Of course, the proximal end and the distal end are also applicable to other components of the delivery catheter 100. The deformable tube 110 is hollow, and the hollow space of the deformable tube 110 can allow the guide wire 400 to pass through. During treatment, the guide wire 400 extends into the delivery catheter 100. During this process, the guide wire 400 moves in the blood vessel through the synergistic effect of the guide wire 400 and the delivery catheter 100 to push the distal end of the deformable tube 110 to the lesion site. When the distal end of the deformable tube 110 is at the lesion site, the distal end of the guide wire 400 extends out of the deformable tube 110 and treats the lesion blood vessel at the lesion site.

[0046] In order to allow the distal end of the delivery catheter 100 to bend, the present application adds a shape memory component 120 to the deformable tube 110, and the shape memory component 120 extends from the proximal end to the distal end in the deformable tube 110. The shape memory component 120 has a shape memory function. When the shape memory function of the shape memory component 120 is activated, the shape memory component 120 can generate a certain bending, and then the shape memory component 120 can drive the deformable tube 110 to bend when bending, so that the distal end of the delivery catheter 100 is bent, which is convenient for the distal end of the delivery catheter 100 to pass through the angled blood vessel 300, and enhance the supporting effect of the deformable tube 110 on the guide wire 400, so as to facilitate the surgical operation.

[0047] The activation of the shape memory component 120 is achieved by the induction component cooperating with the induction device 200 of the delivery system. The induction device 200 is located outside the body, and the induction component is arranged on the shape memory component 120, and can be extended into the blood vessel along with the deformation tube 110. The induction device 200 can cooperate with the induction component by induction, so that the induction component can activate the shape memory function of the shape memory component 120, thereby enabling the distal end of the delivery catheter 100 to bend.

[0048] It can be understood that the deformable tube 110 has a linear state and a curved state. When the deformable tube 110 is in the linear state, the deformable tube 110 is arranged in a straight line, and when the deformable tube 110 is in the curved state, the deformable tube 110 is arranged in a curved state, so that the distal end of the delivery catheter 100 can pass through the angled blood vessel 300. The shape memory component 120 has a shape memory function, which means that after the shape memory component 120 is arranged in the deformable tube 110, the deformable tube 110 and the shape memory component 120 are pre-bent, and after the external action is removed, the deformable tube 110 and the shape memory component 120 can restore the linear state. In this way, the shape memory component 120 can memorize the curved state and the linear state. When the induction component activates the shape memory function of the shape memory component 120, the shape memory component 120 drives the deformable tube 110 to be in the curved state; after the induction device 200 is removed, the shape memory component 120 drives the deformable tube 110 to be in the linear state.

[0049] When the delivery catheter 100 of the present application is used for treatment, the delivery catheter 100 is pushed into the blood vessel through the guide catheter (not mentioned later), and the delivery catheter 100 moves in the blood vessel. When the delivery catheter 100 passes through a conventional blood vessel, the deformable tube 110 is in a linear state. When the delivery catheter 100 encounters an angled blood vessel 300, the sensing device 200 senses and controls the sensing component so that the sensing component activates the shape memory function of the shape memory component 120, that is, the deformable tube 110 is in a curved state, and at this time, the distal end of the delivery catheter 100 can pass through the angled blood vessel 300. The delivery catheter 100 cooperates with the guide wire 400 until the distal end of the delivery catheter 100 reaches the lesion position, and the delivery catheter 100 stops pushing. Subsequently, the distal end of the guide wire 400 extends out of the delivery catheter 100 to treat the lesion blood vessel at the lesion position. When the delivery catheter 100 needs to be withdrawn after the treatment is completed, the sensing device 200 disconnects the sensing component, and the deformable tube 110 is in a linear state, which is easy to withdraw.

[0050] In the delivery catheter 100 of the above embodiment, a shape memory component 120 is added to the deformable tube 110, and a sensing component is added to the shape memory component 120. The shape memory component 120 has a shape memory function, and the sensing component can control the shape memory component 120 to have a shape memory function after being activated under control. At this time, the deformable tube 110 can be bent according to the activation conditions, and after the sensing device 200 is removed, the deformable tube 110 is in a linear state. When the delivery catheter 100 passes through a conventional blood vessel, its linear state is maintained. When the distal end of the delivery catheter 100 reaches a bifurcated blood vessel or an angled blood vessel 300, the sensing component is controlled by the sensing device 200 in vitro to activate the shape memory function of the shape memory component 120, so that the distal end of the delivery catheter 100 can be bent, which is convenient for the delivery catheter 100 to pass through the angled blood vessel 300, and further enhances the support of the distal end of the delivery catheter 100 to the guide wire 400 at the angled blood vessel 300, so that the guide wire 400 can pass through the angled blood vessel 300 smoothly, reducing the pain of the patient, facilitating the operation, and improving the success rate of the operation.

[0051] In one embodiment, the deformable tube 110 has multiple bending angles. That is, the shape memory component 120 can drive the deformable tube 110 to be in different bending states, so that the distal end of the delivery catheter 100 can have different bending states, so that the distal end of the delivery catheter 100 can pass through angled blood vessels 300 and bifurcated blood vessels of different shapes.

[0052] Specifically, the deformable tube 110 and the shape memory component 120 are pre-processed to form multiple bending states, and at the same time, the sensing device 200 is set with multiple sensing gears. When the deformable tube 110 passes through an angled blood vessel 300 of one form, the sensing device 200 senses the sensing component at the corresponding sensing gear to activate the shape memory component 120 to drive the deformable tube 110 to the corresponding bending state. When the deformable tube 110 passes through an angled blood vessel 300 of another form, the sensing device 200 senses the sensing component at the corresponding sensing gear to activate the shape memory component 120 to drive the deformable tube 110 to the corresponding bending state.

[0053] That is, when the sensing device 200 activates the shape memory component 120 through multiple sensing gears and the sensing component, the sensing device 200 selects a suitable sensing gear according to the shape of the angled blood vessel 300, so that the curved shape of the delivery catheter 100 is adapted to the shape of the angled blood vessel 300, so that the distal end of the delivery catheter 100 can smoothly pass through the angled blood vessel 300. In this way, the design of the adjustable bend of the distal end of the delivery catheter 100 can be realized.

[0054] See also Figure 3 In one embodiment, the deformable tube 110 includes an inner tube 111, an intermediate layer 112, and an outer tube 113. The outer tube 113 is sleeved on the inner tube 111, and the intermediate layer 112 is disposed between the inner tube 111 and the outer tube 113. The intermediate layer 112 can be braided to connect the inner tube 111 and the outer tube 113 to form an integral deformable tube 110, thereby ensuring the overall structural strength of the deformable tube 110, so as to stably support the guide wire 400 and facilitate the delivery of the guide wire 400. Moreover, the intermediate layer 112 can also ensure the pushing effect and twisting control effect of the deformable tube 110, thereby facilitating the pushing of the deformable tube 110 in the blood vessel.

[0055] Optionally, the inner tube 111 is made of a material with a low friction coefficient to reduce the friction when the inner surface of the catheter contacts the guide wire 400. Optionally, the inner tube 111 is made of a material with a low friction coefficient such as polytetrafluoroethylene and high-density polyethylene. Optionally, the outer tube 113 is made of a polymer material to ensure the lubricity of the deformable tube 110 and facilitate the pushing of the deformable tube 110 in the blood vessel. Optionally, the outer tube 113 is made of a polymer material such as nylon, polyether block polyamide (PEBAX), thermoplastic polyurethane elastomer (TPU), etc.

[0056] Optionally, the middle layer 112 is a braided layer or a radial spring. Exemplarily, the middle layer 112 is a braided layer, and the braided layer includes a plurality of braided wires, and the plurality of braided wires are interlaced to form the middle layer 112, and the pushing effect and the twisting effect of the delivery catheter 100 are ensured by the middle layer 112. Optionally, the braided wires are made of stainless steel.

[0057] Optionally, the shape memory component 120 is made of nickel-titanium alloy or other materials with shape memory. The present application adds a shape memory component 120 to the deformable tube 110, and realizes its shape memory function through the shape memory component 120 to drive the deformable tube 110 to bend. In this way, during the treatment process, the delivery catheter 100 assists the guide wire 400 to pass through the angled blood vessel 300, providing good support for the guide wire 400 during the operation to ensure the treatment effect.

[0058] In one embodiment, the shape memory component 120 and the sensing component are integrally formed, so that the sensing component is distributed in the shape memory component 120. The sensing component is distributed in the shape memory component 120 along the axial direction. In this way, when the sensing device 200 senses the sensing component, the sensing component can activate the shape memory function of the shape memory component 120 as a whole, so that the shape memory component 120 drives the deformation tube 110 to bend.

[0059] Optionally, the induction component manufacturing material is added to the material of the shape memory component 120. When the induction device 200 senses the induction component, the induction component can activate the shape memory function of the shape memory component 120. Of course, in other embodiments of the present application, the induction component can also be embedded in the shape memory component 120 along the axial direction.

[0060] See also Figures 1 to 3 , the induction component is a magnetic component. Accordingly, the induction device 200 is a magnetic field generator. The magnetic field generator can apply a magnetic field outside the body, and the magnetic component can rotate in the magnetic field, thereby changing the lattice inside the shape memory component 120, and then changing the shape of the shape memory component 120 to change the shape of the deformation tube 110, so that the deformation tube 110 can fit the angled blood vessel 300 and provide good support for the guide wire 400.

[0061] When the distal end of the delivery catheter 100 is pushed into the angled blood vessel 300 or the bifurcated blood vessel, an external magnetic field generator can be used to apply a magnetic field to cause the magnetic elements in the shape memory component 120 to rotate their magnetic moments, thereby changing its internal lattice structure, and then changing the shape of the shape memory component 120, changing the distal curvature of the delivery catheter 100 to fit the angled blood vessel 300, and providing better support performance for the guidewire 400. After the delivery catheter 100 is completed, the external magnetic field is removed to return the delivery catheter 100 to a linear state, thereby facilitating the withdrawal of the delivery catheter 100 from the human body. Optionally, magnetic elements are added to the alloy material to form a shape memory component 120 with an induction component. In this way, magnetic control of the shape memory component 120 can be achieved.

[0062] Of course, in other embodiments of the present application, the sensing component may also be an inductor, a temperature sensing component, or other structural forms that can be deformed under induction. Exemplarily, when the sensing component is an inductor, the sensing device 200 is an electric field generator, and when the electric field generator generates an electric field, the inductor can activate the shape memory function of the shape memory component 120. Exemplarily, when the sensing component is a temperature sensing component, the sensing device 200 is a temperature regulator, and the temperature regulator can adjust the temperature environment of the temperature sensing component to activate the shape memory function of the shape memory component 120.

[0063] See also Figure 3 In one embodiment of the present application, the shape memory component 120 is disposed in the tube wall of the outer tube 113. That is, the shape memory component 120 is embedded in the polymer material of the outer tube 113, and the shape memory component 120 and the outer tube 113 serve as the outermost layer. Of course, in other embodiments of the present application, the shape memory component 120 may also be disposed on the inner wall or outer wall of the outer tube 113. Optionally, the shape memory component 120 is in a strip, column or tubular shape. Optionally, the cross-sectional shape of the shape memory component 120 is set to be circular to ensure that the shape memory component 120 as a whole has good bending performance.

[0064] In one embodiment, the outer tube 113 and the shape memory component 120 are formed by hot melting, embedding or injection molding. In this way, the outer tube 113 and the shape memory component 120 can be formed. Exemplarily, the outer tube 113 and the shape memory component 120 are formed by polymer hot melting.

[0065] In one embodiment, there are multiple shape memory components 120, and the multiple shape memory components 120 are arranged at intervals along the circumference of the outer tube 113, and / or the multiple shape memory components 120 are arranged at intervals along the axial direction of the outer tube 113. In other words, the multiple shape memory components 120 can be arranged at intervals along the circumference, or along the axial direction, or both along the axial direction and along the circumference, so as to ensure that the shape memory components 120 can cover the deformation tube and ensure the bending performance of the deformation tube 113.

[0066] For example, after the plurality of shape memory components 120 are arranged at intervals along the circumferential direction, the bending performance of the deformation tube 110 can be increased, so that the deformation tube 110 is bent in the corresponding direction through the shape memory components 120 in the corresponding direction. Figure 3 As shown, there are four shape memory components 120, and the four shape memory components 120 are distributed at intervals along the circumferential direction. Of course, in other embodiments of the present application, the number of shape memory components 120 can be more.

[0067] In another embodiment of the present application, the shape memory component 120 is formed with the stainless steel wire to form a braided wire; the middle layer 112 is braided by the braided wire. In other words, the shape memory alloy can be added to the braided wire of the middle layer 112 as a part of the braided wire, and after a plurality of braided wires are braided into the middle layer 112, the middle layer 112 can have a shape memory function.

[0068] Under the condition of an external magnetic field, Figure 4 and Figure 5 As shown, Figure 4 for Figure 3 The middle layer 112 shown corresponds to the schematic diagram of the outer side of the blood vessel. Figure 5 for Figure 3 The middle layer 112 shown corresponds to the schematic diagram of the inner side of the blood vessel. The density of the braided wires of the middle layer 112 relative to the inner side of the blood vessel will increase, and the density of the braided wires of the middle layer 112 relative to the outer side of the blood vessel will decrease, thereby causing the shape of the deformable tube 110 to deform to better fit the direction of the blood vessel.

[0069] In one embodiment, the length of the deformable tube 110 ranges from 100 mm to 300 mm. The length of the deformable tube 110 refers to the axial dimension of the deformable tube 110. When the length of the deformable tube 110 is within the above range, the distal end of the deformable tube 110 can smoothly reach the lesion location.

[0070] In one embodiment, the delivery catheter 100 further includes a guide tube 130, which is conically arranged and disposed at the distal end of the deformable tube 110. After the guide tube 130 is arranged at the distal end of the deformable tube 110, it can play a guiding role, facilitating the movement of the delivery catheter 100 in the blood vessel to avoid scratching the blood vessel.

[0071] In one embodiment, the delivery catheter 100 further includes a support tube 150, and the deformable tube 110 is disposed at the distal end of the support tube 150. The distal end of the support tube 150 is connected to the proximal end of the deformable tube 110, and the deformable tube 110 is supported by the support tube 150. Moreover, the structure of the support tube 150 is substantially the same as that of the deformable tube 110, except that the shape memory component 120 is not disposed in the support tube 150.

[0072] In one embodiment, the delivery catheter 100 further includes a developing ring 140, which is disposed at the distal end of the deformable tube 110. The developing ring 140 has a developing function, and the distal end of the delivery catheter 100 is located by the developing ring 140, so as to facilitate controlling the distal end of the delivery catheter 100 to reach the lesion position.

[0073] The delivery catheter 100 of the present application adds a shape memory component 120 to the deformable catheter, and adds a sensing component to the shape memory component 120. The sensing component can control the shape memory component 120 to have a shape memory function after being activated under control. In this way, it is convenient for the distal end of the delivery catheter 100 to pass through the angled blood vessel 300, and at the same time, it can also enhance the support of the delivery catheter 100 to the guide wire 400 at the angled blood vessel 300. The cooperation of the sensing device 200 and the sensing component can pre-shape the deformable tube 110, and then restore it to the straight shape of the delivery catheter 100 after completion. After the delivery catheter 100 enters the human body and reaches the lesion position, it can be activated by the external sensing device 200 when necessary to realize the bending of the distal end of the delivery catheter 100 to restore to the pre-plastic state, so that the distal opening of the delivery catheter 100 is adapted to the different angles of the bifurcated blood vessels, thereby achieving a more accurate control of the direction of the delivery catheter 100 in the blood vessel, and further enhancing the support of the delivery catheter 100 to the guide wire 400, making it easier to reach and pass through the lesion position.

[0074] The delivery catheter 100 maintains its linear state during the process of passing through a conventional blood vessel. When the distal end of the delivery catheter 100 reaches the bifurcated vessel or the angled vessel 300, the sensing component is controlled by the sensing device 200 in vitro to activate the shape memory function of the shape memory component 120, thereby realizing the adjustable bend of the distal end of the delivery catheter 100, facilitating the delivery catheter 100 to pass through the angled vessel 300, and further enhancing the support of the distal end of the delivery catheter 100 for the guide wire 400 at the angled vessel 300, so that the guide wire 400 can smoothly pass through the angled vessel 300, thereby reducing the patient's pain, facilitating surgical operations, and improving the success rate of the operation.

[0075] See also Figure 1 and Figure 2 The present application also provides a delivery system, including a sensing device 200, a guide wire 400, and a delivery catheter 100 as in any of the above embodiments. The sensing device 200 can activate the shape memory function of the shape memory component 120 in the delivery catheter 100, and the guide wire 400 is delivered to the lesion position through the delivery catheter 100. After the delivery device of the present application adopts the delivery catheter 100 of the above embodiment, it can accurately pass through the angled blood vessel 300 to reach the lesion position, further enhance the support of the distal end of the delivery catheter 100 to the guide wire 400 at the angled blood vessel 300, so that the guide wire 400 can smoothly pass through the angled blood vessel 300, reduce the patient's pain, facilitate the surgical operation, and improve the success rate of the operation.

[0076] See also Figure 2 and Figure 6 The induction device 200 is a magnetic field generator, and the induction component in the delivery catheter 100 is a magnetic component; the magnetic component activates the shape memory function of the shape memory component 120 under the action of the magnetic field. Figure 6 for Figure 2 The magnetic field generator is shown as a schematic diagram. The magnetic field generator can apply a magnetic field in vitro, and the magnetic element can rotate in the magnetic field, thereby changing the lattice inside the shape memory component 120, and then changing the shape of the shape memory component 120 to change the shape of the deformable tube 110, so that the deformable tube 110 can fit the angled blood vessel 300 and provide good support for the guide wire 400.

[0077] See also Figures 2 to 6 In one embodiment, the magnetic field generator includes an adjustment knob 210, a plurality of adjustment gears 230, and a grip 220. The grip 220 is disposed on the adjustment knob 210. The plurality of adjustment gears 230 are disposed at intervals. The adjustment knob 210 can move to correspond to different adjustment gears 230 to indicate the magnetic field strength. During the operation, the operator holds the grip 220 with one hand and turns the adjustment knob 210 to the plurality of adjustment gears corresponding to the shape of the deformation tube 110 to activate the shape memory function and realize the bending of the distal end of the delivery catheter 100.

[0078] Optionally, the adjustment knob 210 can be rotatably arranged inside a plurality of adjustment gears 230. In this way, the operator can control the adjustment rotation when holding the grip portion 220 to turn the adjustment knob 210 to the corresponding adjustment gear 230 to activate the shape deformation function of the shape memory component 120, so that the deformation tube 110 is in a corresponding bending state. Of course, in other embodiments of the present application, the adjustment knob 210 can also be adjusted in a sliding direction corresponding to the adjustment gear 230.

[0079] In one embodiment, the sensing device 200 is an electric field generator, and the sensing component in the delivery catheter 100 is an inductor, or the sensing device 200 is a temperature regulator, and the sensing component in the delivery catheter 100 is a temperature sensor. Exemplarily, when the sensing component is an inductor, the sensing device 200 is an electric field generator, and when the electric field generator generates an electric field, the inductor can activate the shape memory function of the shape memory component 120. Exemplarily, when the sensing component is a temperature sensor, the sensing device 200 is a temperature regulator, and the temperature regulator can adjust the temperature environment of the temperature sensor to activate the shape memory function of the shape memory component 120.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A delivery catheter, characterized in that: include: The deformable tube is hollow; A shape memory component is disposed in the deformation tube and extends to the distal end of the deformation tube, and the shape memory component can be bent and deformed; as well as The induction component is arranged in the shape memory component. Under the control of the induction device of the conveying system, the induction component can activate the shape memory function of the shape memory component so that the shape memory component drives the bending of the deformation tube.

2. The delivery catheter according to claim 1, characterized in that: The deformable tube comprises an inner tube, an intermediate layer and an outer tube. The outer tube is sleeved on the inner tube, and the intermediate layer is arranged between the inner tube and the outer tube.

3. The delivery catheter according to claim 2, characterized in that: The shape memory component is arranged in the tube wall of the outer tube; The shape memory component is in the shape of a bar, a column or a tube.

4. The delivery catheter according to claim 3, characterized in that: The outer tube and the shape memory component are formed by hot melting, embedding or injection molding.

5. The delivery catheter according to claim 3, characterized in that: There are multiple shape memory components, and the multiple shape memory components are arranged at intervals along the circumferential direction of the outer tube, and / or the multiple shape memory components are arranged along the axial direction of the outer tube.

6. The delivery catheter according to claim 2, characterized in that: The shape memory component and the stainless steel wire are formed into a braided wire; and the middle layer is formed by braiding the braided wire.

7. The delivery catheter according to any one of claims 1 to 6, characterized in that: The shape memory component and the induction component are integrally formed, so that the induction component is distributed in the shape memory component.

8. The delivery catheter according to any one of claims 1 to 6, characterized in that: The induction component is a magnetic component, an inductive component or a temperature sensing component.

9. The delivery catheter according to any one of claims 1 to 6, characterized in that: The length of the deformation tube ranges from 100 mm to 300 mm.

10. The delivery catheter according to any one of claims 1 to 6, characterized in that: The delivery catheter further comprises a guide tube, which is arranged in a conical shape and is arranged at the distal end of the deformable tube; The delivery catheter further comprises a support tube, and the deformation tube is arranged at the distal end of the support tube.

11. A conveying system, characterized in that: It comprises a sensing device, a guide wire and a delivery catheter as described in any one of claims 1 to 10, wherein the sensing device can activate the shape memory function of the shape memory component in the delivery catheter, and the guide wire is delivered to the lesion site through the delivery catheter.

12. The conveying system according to claim 11, characterized in that The induction device is a magnetic field generator, and the induction component in the delivery catheter is a magnetic component; The magnetic member activates the shape memory function of the shape memory component under the action of the magnetic field.

13. The conveying system according to claim 12, characterized in that The magnetic field generator includes an adjustment knob, a plurality of adjustment gears and a gripping portion, wherein the gripping portion is arranged on the adjustment knob, the plurality of adjustment gears are arranged at intervals, and the adjustment knob can move to correspond to different adjustment gears to indicate the magnetic field strength.

14. The conveying system according to claim 11, characterized in that The induction device is an electric field generator, and the induction component in the delivery conduit is an inductor; or, the induction device is a temperature regulator, and the induction component in the delivery conduit is a temperature sensor.

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