246 results about "Vascular stents" patented technology

The invention relates to the field of biomedical materials, discloses a hydrogen sulfide / nitric oxide synergistic anti-inflammatory and anti-coagulation repair promoting coating as well as a preparation method and application thereof, and provides a coating with anti-inflammatory, anti-coagulation and tissue repair promoting functions through the synergistic effect of hydrogen sulfide and nitric oxide. The coating comprises a hydrogen sulfide donor which can spontaneously release hydrogen sulfide or a precursor thereof or release hydrogen sulfide under external stimulation; the coating further comprises a component capable of catalyzing the release of nitric oxide from the endogenous nitric oxide donor. The coating is covalently connected with the surface of a base material through a chemical means to form firm interface bonding; and the coating has a multi-cross-linked network structure, so that the coating is endowed with good stability, and long-term functional application of the coating on the surface of a biomedical material is ensured. The method can be widely applied to surface modification of biomedical materials, especially coating functionalization of implanted instruments such as valve clips, intravascular stents, heart valves, occluders, vascular grafts and myocardial patches.

The invention discloses a high-performance zinc alloy with a gradient structure and a preparation method and application thereof, and belongs to the technical field of metal material processing. The high-performance zinc alloy with the gradient structure is characterized in that the grain sizes of upper, middle and lower areas of the alloy are in fine-coarse-fine distribution, the grain sizes of the upper and lower areas are smaller than or equal to 2 microns, the grain size of the central area is 5-20 microns, and the grain size of a transition area between the upper and lower areas and the central area is 2-15 microns; meanwhile, all the areas are accompanied with MnZn13 nano precipitated phases with the size smaller than or equal to 50 nm. The alloy shows excellent deformation resistance and thermal mechanical stability, the elasticity modulus of the alloy can at least reach 125 GPa, meanwhile, the alloy shows excellent corrosion resistance, and the alloy is particularly suitable for biomedical implantation instruments such as intravascular stents and bone nails.

The invention relates to the technical field of medical instruments, in particular to a balloon delivery microcatheter and a using method thereof.The microcatheter comprises a handle, a balloon delivery pipe, a balloon delivery pipe and a balloon delivery pipe, the catheter body is connected with the handle, and the catheter body sequentially comprises a near-end tube, a balloon tube and a far-end tube from near to far; wherein the catheter body is of a double-cavity structure and comprises an inner cavity and an outer cavity, the inner cavity is a channel, one end of the inner cavity is communicated with the first connector, and the other end of the inner cavity penetrates to the end of the far-end tube and is used for conveying instruments, therapeutic drugs or diagnostic radiography liquid; one end of the outer cavity is communicated with the second connector, the other end of the outer cavity is communicated with the balloon tube, and the outer cavity is used for filling and pressure relief of the balloon tube. The balloon catheter has the functions of a micro catheter and a balloon catheter, a near-end blood vessel can be blocked, temporary blocking of local blood flow is achieved, the balloon catheter is further used for expanding the position, not attached to the wall, of an intravascular stent, the stent can be better attached to the blood vessel wall, and therefore pain and risks of a patient are reduced.

The invention discloses an intravascular stent which comprises a main stent body with a main lumen, the main stent body comprises a near-end section, a far-end section and a middle section which is located between the near-end section and the far-end section and extends in the axial direction, and a concave part is arranged on the middle section. A supporting structure protruding outwards relative to the concave part is arranged above the concave part, and at least part of the supporting structure is degradable. According to the intravascular stent, at least part of the supporting structure on the top of the intravascular stent is degradable, the initial mechanical supporting effect of the groove section is guaranteed under the effect of not abandoning the overall structure, and the material of the part can be automatically absorbed under the effect of a certain time in the long period; constraint extrusion on the branch stent is reduced, and invasion and occupation of the space of a main cavity and stimulation influence on the inner wall of a blood vessel are reduced.

The invention discloses a shape memory intravascular stent capable of body temperature recovery and a preparation method thereof, and the preparation method comprises the following steps: drying polylactic acid granules, adding PEG for toughening, carrying out melt blending, adding polylactic acid fibers as a reinforcing phase, and carrying out screw extrusion to obtain a composite material. The toughness of the shape memory material is improved, the shape recovery temperature of the shape memory material is reduced, and shape recovery under the human body temperature is achieved. The intravascular stent is prepared through 3D printing, and the prepared shape memory intravascular stent has good recovery rate and fixation rate, lower recovery temperature and good biocompatibility.

The invention relates to the technical field of medical instruments, and particularly discloses an intravascular stent. The stent is tubular and comprises a plurality of supporting rings and a plurality of connecting rods, the supporting rings are arranged at intervals in the axial direction of the intravascular stent, and every two adjacent supporting rings are connected through the corresponding connecting rod; the intravascular stent comprises a middle area and two end areas which are arranged in the axial direction, the two end areas are located at the two axial ends of the intravascular stent respectively, the middle area is located between the two end areas, the portion, located in the middle area, of the supporting ring comprises a plurality of first supporting rods connected in the circumferential direction, and the portion, located in the end areas, of the supporting ring comprises a plurality of second supporting rods connected in the circumferential direction. The width of the first supporting rod is larger than that of the second supporting rod. According to the stent, the widths of the supporting rings of all parts are limited, so that the good flexibility of the two ends of the stent is guaranteed before the stent is expanded, the supporting force of the middle is high, and the passing ability of the stent is improved; the stent is axially retracted after being expanded and is uniform in shape, so that the bone effect of a dog is reduced.

The invention relates to the technical field of medical instruments, in particular to a flexibly-used multi-branch intravascular stent which comprises a stent body and a blood vessel bridle, the stent body comprises a first main blood vessel, a second main blood vessel, a first branch, a second branch, a third branch, a fourth branch and a supporting ring, and an opening in the upper end of the first branch is a free movable end; an upper port of the second branch is a free movable port, an upper port of the third branch is a free movable port, one end of the fourth branch is a free movable port, and a near-end opening of the first main blood vessel is a free movable end; the far end of the first main blood vessel is communicated with the near end of the second main blood vessel; a flange edge is annularly arranged on the outer side wall of the far end of the first main blood vessel, and a supporting ring is annularly arranged on the outer side wall of the near end of the second main blood vessel. By means of operation, the time of profound hypothermia circulation arrest is greatly shortened, brain damage and organ damage to a patient are reduced, the application range of the intravascular stent assembly is expanded, and the intravascular stent assembly can be better matched with branch blood vessels of the patient.

The utility model relates to an intravascular stent, a stent system and a windowing area adjusting method, a stent body section is provided with a stent body inner cavity with two through ends, a branch window penetrating through the stent body inner cavity is formed in the side wall of the stent body section, and the branch window is located on the side wall of the first end of the stent body section and formed to the end side of the first end of the stent body section; the pipe body section is provided with a pipe body inner cavity with two through ends, and one end part of the pipe body section is connected with the second end part of the frame body section, so that the pipe body inner cavity is communicated with the frame body inner cavity. The branch windows of the two intravascular stents can be spliced into a complete closed window, and the overlapped length of the two intravascular stents can be adjusted to adapt to the actual sizes of the three branches on the arch to construct a windowing area with a proper size, so that the blood supply of the three branches on the arch is ensured. When the stent is used for interventional operation, in-vitro windowing or in-situ windowing is not needed, and when the stent is used for open operation, the number of anastomotic stomas can be reduced, the circulation stopping time can be shortened, and meanwhile the three-branch anatomical structure on the arch can be reserved. Therefore, the existing operation requirements are met.

The invention relates to an endovascular stent comprising a tubular expandable lattice structure comprising a plurality of negative Poisson' s ratio (NPR) cells in connection with at least one row of positive Poisson's ratio (PPR) cells provided along a length of the stent. Each NPR cell may have a shape of a re-entrant (RE) hexagon. The stent may be automatically bent after expansion. The invention also relates to an endovascular stent graft comprising the endovascular stent and a liner provided around the endovascular stent.

The invention discloses a fucoidin-bioactive peptide coated intravascular stent and a preparation method thereof, and belongs to the technical field of medical treatment. The surface of the fucoidin-bioactive peptide coating intravascular stent is coated with a composite coating, and the composite coating is composed of fucoidin and bioactive peptide. The invention discloses a fucoidin-bioactive peptide coated intravascular stent and a preparation method thereof, and the fucoidin-bioactive peptide coated intravascular stent not only solves the problems of poor blood compatibility and slow endothelialization, but also has multiple functions of anticoagulation, anti-proliferation and repair promotion. The intravascular stent coating technology is comprehensively upgraded, and a safer, more effective and more lasting solution is provided for treatment of cardiovascular diseases.

The invention relates to an intelligent cerebrovascular stent based on polymer short fibers and a preparation method thereof. The method comprises the following steps: carrying out electrostatic spinning on a polymer spinning solution to obtain polymer long fibers, freezing the polymer long fibers in liquid nitrogen, and carrying out low-temperature shearing dispersion to obtain polymer short fibers; a polymer in the polymer spinning solution is at least one of polycaprolactone, polylactic acid, gelatin, cellulose, fibroin, collagen and chitosan; uniformly mixing the temperature response high-molecular polymer and the polymer short fiber to obtain a 4D printing raw material; and designing a 4D printing model of a spider-leg-imitating structure, and performing 4D printing on a 4D printing raw material to obtain the intelligent cerebrovascular stent. According to the preparation method, the intelligent cerebrovascular stent with the spider-leg-imitating structure is prepared, the spider-leg-imitating structure design and the introduction of the polymer short fibers can endow the cerebrovascular stent with better shape adaptability and intelligent responsiveness, and the mechanical property and the anti-skid property of the cerebrovascular stent are effectively improved.

The invention discloses an intravascular stent anchoring degree evaluation method, device and equipment and a storage medium, and the method comprises the steps: building a mapping relation between the radial supporting force of an intravascular stent and the radius of the intravascular stent, defining an anchoring force index used for evaluating the anchoring degree of the intravascular stent, processing the blood vessel image data, generating a three-dimensional blood vessel model, and obtaining the anchoring degree of the intravascular stent. The method comprises the following steps: establishing an anchoring force index, combining the anchoring force index, implementing an intravascular stent virtual implantation process on a computer, calculating and updating the anchoring force indexes of the intravascular stent at different positions in a blood vessel in real time according to the actual expansion degree of the intravascular stent, finally collecting clinical follow-up data after the intravascular stent is implanted, and combining the anchoring force index to extract key feature parameters. And training by using a machine learning model to obtain a trained intravascular stent anchoring degree evaluation model so as to evaluate the anchoring degree of the intravascular stent. According to the method, the anchoring force index is provided from the mechanical angle, and the anchoring degree of the intravascular stent can be evaluated more accurately.

The invention provides a self-expanding hydrogel intravascular stent and a preparation method thereof, and belongs to the technical field of medical instruments, the intravascular stent is of a hollow tubular structure, and the tube wall is of a sealed type; the intravascular stent is made of a hydrogel material. After the hydrogel stent shrinks, the size of the hydrogel stent is obviously reduced, the hydrogel stent can be delivered to a target position in a balloon intervention mode, and the hydrogel stent can stay at the target position and provide a supporting effect on the hydrogel stent due to the fact that the hydrogel stent has a self-expansion effect.

The invention discloses an extravascular stent, which belongs to the technical field of intravascular stents, and comprises: a fixed seat comprising a fixed support and a belt body; the fixing support is suitable for being nested on a first blood vessel adjacent to an anastomotic stoma, a fixing part is arranged at one end of the fixing support, and a through hole is formed in the fixing part; one end of the shoelace body is fixed at the other end of the fixed support, and the other end of the shoelace body can penetrate through the through hole; the fixing piece is provided with a fixing structure capable of fixing the belt body on the through hole; the sleeve is connected to the fixed support, and the sleeve is suitable for being arranged on the periphery of the second blood vessel close to the anastomotic stoma in a sleeving mode. The extravascular stent is simple in structure, the fixing position of the belt body on the fixing piece can be adjusted according to the diameters of different first blood vessels, the fixing support of the extravascular stent can be firmly fixed to the anastomotic stoma position all the time, and applicability is higher.

The invention provides a conveying device. The conveying device comprises a main stent conveying pipe and a multi-cavity pipe. The main stent conveying pipe is used for conveying an intravascular stent, and a branch opening is formed in the intravascular stent; the multi-cavity tube comprises a plurality of cavities, the cavities have different axial lengths, the preset guide wire is preset in at least one branch opening, and the multi-cavity tube can reach the branch opening along the preset guide wire to establish a passage from the branch opening to the branch blood vessel. According to the conveying device, the intravascular stent can be conveyed only through the lower limb admission passage, the intravascular stent does not need to be conveyed from the upper limb admission passage, and damage to healthy blood vessels is reduced.

The invention provides a cutting woven type stent, and belongs to the technical field of medical instruments for treating vascular diseases. The stent comprises an intravascular stent body, a medicine carrying groove used for containing medicine is formed in the outer surface of the intravascular stent body, sustained-release capsules are fixedly distributed in the medicine carrying groove, each sustained-release capsule is provided with a shell, a containing cavity is formed in the shell, and medicine particles and a shell breaking component are loaded in the containing cavities of part of the sustained-release capsules; the medicine assembly for rapidly treating intracranial vascular stenosis further comprises a driving component, and the driving component is arranged in vitro and used for driving the shell breaking component to rapidly break the shell so as to rapidly release medicine particles in the shell. The drug eluting stent is mainly used for solving the technical problem that a drug eluting stent in the prior art cannot quickly release drugs and cannot quickly generate a treatment effect.

The invention relates to the technical field of medical instruments, in particular to an intravascular stent. According to the specific technical scheme, the intravascular stent comprises a stent skeleton, after the stent skeleton is subjected to surface treatment, at least one layer of film covering section is arranged outside the stent skeleton, and medicine release sections are arranged at the two ends of the stent skeleton. The problems that in the drug release process of an existing stent, the drug release rate is uneven, biocompatibility is poor, and thrombus and restenosis are caused by a metal stent are solved.

The invention discloses a functional coating, an intravascular stent and a preparation method and application of the intravascular stent. The functional coating comprises an endothelialization promoting active substance and an anti-proliferation drug; the endothelialization promoting active substance comprises at least one of polypeptide containing an RGD sequence, polypeptide containing a YIGSR sequence, polypeptide containing an REDV sequence, a beta-polypeptide polymer or a beta-polypeptide-polyester block copolymer. The functional coating disclosed by the invention can be used for surface functional modification of interventional medical devices, can selectively promote adhesion and proliferation of vascular endothelial cells at an implantation part, realizes rapid endothelialization, and can controllably release an anti-proliferation drug to inhibit excessive proliferation of vascular smooth muscle cells, so that the vascular endothelial cells are prevented from being damaged. Therefore, the risks of restenosis and advanced thrombus are effectively reduced.

The invention discloses a digital twinning method for a virtual clinical test of an intravascular stent. The method comprises the following steps: obtaining a preprocessed image after segmentation and preprocessing; performing blood vessel segmentation on the preprocessed image to obtain a blood vessel segmentation image; processing the blood vessel segmentation image to obtain a preprocessed real patient blood vessel model; performing virtual blood vessel sample amplification to generate a virtual blood vessel model; a full-order CFD model is constructed, and hemodynamic parameters are obtained; training the PINN physical neural network to obtain PINN prediction data; and obtaining a preset mechanical condition. Medical images are analyzed and processed through an image processing technology, position detection, segmentation extraction, three-dimensional reconstruction and three-dimensional display of human blood vessels and diseased regions of the human blood vessels are achieved, and hemodynamic changes of specific parts are simulated through different support designs and placement.

The invention discloses a corrosion-resistant and collagen-functionalized magnesium-based metal coating and a preparation method of the corrosion-resistant and collagen-functionalized magnesium-based metal coating. Belongs to the technical field of biomedical material preparation. The preparation method comprises the following steps: firstly introducing hydroxyl into the surface of the magnesium alloy through alkali treatment, then sequentially dipping the magnesium alloy into a solution A and a solution B containing specific copolymers, drying to obtain an anti-corrosion coating, and finally coating with a recombinant humanized collagen solution. The copolymer A in the solution A and a magnesium substrate form a firm Si-O-Mg covalent bond through a silane coupling agent, and the fluorine-containing copolymer B in the solution B is tightly combined with a bottom layer through self-assembly, so that a super-hydrophobic anti-corrosion barrier with a stable structure and strong adhesion is constructed. The outermost collagen layer endows the magnesium alloy material with excellent endothelial cell adhesion and proliferation promoting activity. The multi-layer composite coating structure effectively solves the problems that magnesium alloy degradation is too fast, and an existing coating is weak in binding force and lacks biological functions, and has wide application prospects in implantable medical devices such as intravascular stents.

The present invention relates to the technical field of medical devices, and specifically to a self-expanding drug-coated vascular stent, which is a mesh tube structure formed by connecting a plurality of main ribs and a plurality of connecting ribs, wherein the plurality of main ribs are evenly distributed along the circumference, and two adjacent main ribs are connected by connecting ribs; when the mesh tube structure is in an expanded state, the main ribs extend in a sinusoidal waveform, the connecting ribs extend in the same direction as the main ribs, the connecting ribs are connected to the side of the main ribs where the crest or trough is protruding, one side of the same connecting rib is connected to the crest of a main rib, and the other side of the connecting rib is connected to the trough of another adjacent main rib; when the mesh tube structure is in an unfolded and flattened state, the plurality of main ribs are parallel to each other, and the connecting ribs extend in a fishbone shape along the extension direction of the main ribs. Different branch ribs of the connecting ribs exert force on the main ribs, so that the axial flexibility of the vascular stent is better, and the instantaneous non-uniform expansion phenomenon of the vascular stent during the expansion process can be effectively alleviated, and the wall adhesion of the stent after implantation can be ensured.

The application provides an active exosome stent coating, a vascular stent and a preparation method and application, and belongs to the technical field of biomedical intervention instruments. The active exosome stent coating of the application adopts stem cell-derived myocardial cell active exosomes which are strengthened by active components of traditional Chinese medicine. Compared with commercial myocardial cells, the stem cell-derived myocardial cells have more significant effects of promoting blood vessels and tissue repair and regeneration, and stronger cytokine secretion capacity. The preparation method of the active exosome stent coating of the application adjusts the introduction sequence and premixing mode of active components such as exosomes and drugs, and enhances the homogeneity and stability. The vascular stent prepared by using the active exosome stent coating of the application has reasonable sequential release kinetics design, can realize precise targeted regulation on human coronary artery smooth muscle cells (HCASMC) in vitro, does not affect the repair potential of endothelial cells, and solves the contradiction between traditional stents in terms of "anti-proliferation and promotion of healing".

The invention relates to a superfine magnesium alloy wire and a preparation method and application thereof.The preparation method comprises the following steps that S1, smelting is conducted, specifically, magnesium alloy raw materials are mixed and heated, and an alloy ingot is prepared; s2, extrusion is conducted, specifically, the alloy cast ingot is subjected to hot-pressing extrusion, and a wire rod with the diameter being 10-15 mm is obtained; s3, rotary forging is conducted, specifically, rotary forging machining is conducted on the wire rod N times, N is a positive integer larger than or equal to 3, and a thick wire is obtained; and S4, wire drawing is conducted, specifically, the thick wire is subjected to multi-pass continuous reducing drawing, annealing is conducted before each time of drawing, the single-pass reducing rate is controlled to be 10%-20% till the diameter is smaller than or equal to 0.6 mm, fine drawing is conducted, the single-pass reducing rate is controlled to be smaller than or equal to 5% till the diameter is 0.2-0.4 mm, surface polishing is conducted, and the superfine magnesium alloy wire is obtained. According to the method, the tensile strength of the material is improved, the surface smoothness meets the medical-grade requirement, collaborative optimization of the mechanical property and the microstructure of the obtained superfine magnesium alloy wire is achieved, and the superfine magnesium alloy wire is completely matched with use scenes such as anastomosis nails and intravascular stents.

1. The name of this design product: protective box. 2. Purpose of the product with this design: The product with this design is used to place and fix peripheral vascular stents. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The present invention relates to a peripheral vascular stent, which comprises a plurality of support units arranged at intervals and a membrane. Each support unit is formed by a silk thread and is a closed ring shape. Each support unit comprises a plurality of peaks and valleys that are centered on the axis of the peripheral vascular stent and are arranged periodically in the circumferential direction. Two adjacent peak tops form one cycle. The membrane is covered on the plurality of support units. The flexibility of the membrane is greater than that of the support unit. A plurality of hollowed-out areas are formed on the silk threads of the same support unit and / or on the membrane between two adjacent support units. Two adjacent support units are connected only through the membrane outside the hollowed-out areas. The vascular stent of the present invention can meet the mechanical property requirements under various deformation states of the lower limb artery, has appropriate radial supporting force and good flexibility, can well reduce the chronic outward expansion force in the vascular stent. The vascular stent of the present invention has little influence on blood flow, little damage to the inner wall of the blood vessel, and is not easy to cause secondary thrombosis formation.

Disclosed in the present invention is a vascular stent. The vascular stent comprises a main stent provided with a main lumen; the main stent comprises a proximal section, a distal section, and a middle section located between the proximal section and the distal section and extending axially; a recessed portion is provided on the middle section; a supporting structure which protrudes outwards relative to the recessed portion is provided above the recessed portion; and at least part of the supporting structure is degradable. According to the vascular stent of the present invention, at least part of the supporting structure at the top of the vascular stent is configured to be degradable. In this way, the initial mechanical supporting effect of a recess section is guaranteed while retaining the overall structure. In a long term, the material of this part can be automatically absorbed after a certain time, thereby reducing the restraint and compression on a branch stent, reducing the occupancy of the main cavity space, and reducing the stimulation effect on the inner wall of a blood vessel.

The present invention provides a vascular stent and relates to the technical field of medical instruments. The vascular stent comprises a middle portion and an end portion. The end portion is connected to both ends of the middle portion. The middle portion comprises a plurality of wave-shaped support rings arranged in an axial direction. An S-shaped connecting member is arranged between adjacent wave-shaped support rings. Both ends of the S-shaped connecting member are respectively connected to a crest and a trough of the adjacent wave-shaped support rings. A support portion is arranged on the S-shaped connecting member. When the wave-shaped support ring is compressed and a pushing force is applied, the support portion can abut against the crest and / or trough of the wave-shaped support ring. According to the intracranial vascular stent provided by the present invention, two or even more groups of pushing force transmission channels are formed on one S-shaped connecting member, and the pushing force can be more uniformly transmitted to the wave-shaped support rings, thereby reducing the risk of stent deformation caused by excessive local pushing force, significantly improving the pushing performance of the stent in a microcatheter, and solving the problems of existing intracranial vascular stents being difficult to push and prone to folding.

This invention relates to a covered stent. Capable of radial collapse and expansion, it comprises a first occlusion portion, a stent middle layer, a second occlusion portion, and a support portion connected sequentially from a first end to a second end, and a covering membrane disposed in the first occlusion portion, the stent middle layer, and the second occlusion portion. The covering membrane serves to isolate blood flow. In the radially expanded state, because the outer diameter of the tubular stent middle layer is smaller than the outer diameters of the first and second occlusion portions, the covered stent is fixed to the blood vessel by the occlusion discs at both ends. The stent middle layer does not need to apply radial support force to the inner wall of the blood vessel for enhanced fixation, effectively avoiding tissue pressure. A support portion is provided at the second end of the second occlusion portion, and the outer diameter of the support portion is larger than the outer diameter of the second occlusion portion. The larger diameter effectively prevents the stent from being displaced towards the first end by blood flow, providing double protection for stent fixation.

The invention belongs to the technical field of intravascular stents, and discloses a degradable balloon stent and a preparation method thereof.The degradable balloon stent comprises a net-shaped stent body, the stent body is cylindrical, the inner side of the stent body is connected with an inflation balloon in a sleeved mode, and the inflation balloon is used for sending the stent body to an affected part and expanding the stent body; the whole outer cylindrical wall of the stent is wrapped and connected with a drug bearing layer, the drug bearing layer uniformly bears an anti-proliferation drug, and the material of the drug bearing layer is an absorbable material; wherein the medicine bearing layer is arranged to be of an expandable or contractible structure, and when the stent is expanded, the medicine bearing layer is expanded along with the stent; the problem that the occurrence rate of restenosis of positions corresponding to stent meshes is high is solved.

The utility model discloses an intravascular stent cleaning and fixing device which comprises a top cover, an installation disc and a base which are coaxially matched in an aligned mode and sequentially arranged in the axial direction at intervals, and further comprises a supporting column sequentially penetrating through the top cover, the installation disc and the base in the axial direction. A plurality of supporting devices capable of containing intravascular stents in a one-to-one correspondence mode are arranged between the top cover and the installation disc and between the installation disc and the base respectively. According to the intravascular stent cleaning and fixing device, cleaning treatment of an intravascular stent can be more efficient, and the cleaning quality is better.