69 results about "Arterial stents" patented technology

The invention relates to a percutaneous aorta bracket or an aortic valve bracket system with far-end protection, which comprises an outer sheath pipe, a limit pipe and an inner sheath pipe, wherein the inner sheath pipe is arranged in the limit pipe; the limit pipe is arranged in the outer sheath pipe; the inner sheath pipe is a hollow pipe; three handles are respectively arranged at the near ends of the inner sheath pipe, the limit pipe and the outer sheath pipe. The system further comprises a protector and a protector limiting device, wherein the protector is arranged between the far end parts of the outer sheath pipe and the inner sheath pipe; the near end of the protector is connected with the far end of the protector limiting device; the protector limiting device is arranged between the limit pipe and the outer sheath pipe; the near end of the protector limiting device is fixedly connected with the far end of the limit pipe; a retracing conducting wire is fixedly connected with the near end of the protector; the far end part of the end retracing conducting wire is arranged on the outer side of the outer sheath pipe. The system provided by the invention effectively prevents impurities such as valve leaflet tissue or atheromatous plaque touched to fall due to follow-up operations from entering into vessels such as carotid, remarkably reduces the complexity and the difficulty of the operation, and shortens the operation time and the recovery time after the operation.

The invention provides a negative-Poisson-ratio chiral concave hexagonal hybrid unit cell vascular stent which comprises an annular angular point and three ligaments, and the three ligaments are at equal intervals and are tangent to the annular angular point to form single angular points. Mirroring operation is carried out on the single angular points to form chiral concave hexagonal hybrid periodic unit cells. The chiral concave hexagonal hybrid periodic unit cells are annularly and periodically arranged along an arterial stent and periodically arranged along the arterial stent in a mirroringmode to form the chiral concave hexagonal hybrid unit cell vascular stent. The stent has the negative Poisson ratio characteristic, the mechanical property of the vascular wall internal membrane canbe matched through unit cell structure parameter regulation and control, the damage of the stent to vascular wall biological tissue is reduced, the restenosis risk of the vascular wall is reduced, andvascular wall biological tissue regeneration is promoted.

The invention relates to the field of coronary stents, specifically to a method for reducing the incidence of in-stent restenosis and its special stainless steel material. The method of the invention adds a proper amount of copper element (2.0-6.0% by weight) into the common clinical coronary stent material 316L stainless steel, and conducts special heat treatment so as to make the copper separated in a copper-rich phase out of the stainless steel substrate. The stent is enabled to continuously release trace amounts of copper ions in a clinical environment, and the coronary stent is endowed with an anti-restenotic function, thus effectively reducing the incidence of restenosis after stent implantation. With a unique function of reducing the in-stent restenosis phenomenon caused by stent implantation into a coronary artery, the 316L type copper-containing stainless steel of the invention is conducive to solve clinical problems such as high incidence of in-stent restenosis after implantation of existing stainless steel coronary stents, and can be applied in coronary stents and other clinical medicine fields, thus providing a new idea and material basis for development and application of coronary stents.

The invention relates to a surgical instrument table used for containing an arterial stent conveying system when a doctor carries out preparation work before surgery. The surgical instrument table is characterized by comprising a table face, a first shielding device, a frame body, a control portion and a movable portion. The first shielding device is connected with the table face and surrounds the edges of two wide sides of the table face and the edge of one long side of the table face. The frame body is used for supporting the table face and is provided with a telescopic stand column. The control portion is provided with a displayer and a control chip and is used for controlling the length of stretching and retraction of the telescopic stand column. The movable portion is connected to the bottom of the frame body. The height of the surgical instrument table can be adjusted according to the height of the doctor, and therefore the doctor can carry out surgical operations more comfortably.

The invention discloses a vertebral artery stent. The vertebral artery stent comprises denser class-I annular units and sparser class-II annular units, which are connected and respectively arranged at the near end and the far end of a vertebral artery to form a tubular structure, wherein each denser class-I annular unit is formed by tandem connection of axially symmetrical U-shaped structures, and each sparser class-II annular unit is formed by tandem connection of axially asymmetrical U-shaped structures. Through the approach, the vertebral artery stent can effectively reduce the incidence of restenosis, provides a good platform for the development of vertebral artery stents, and can realize the purpose of treatment of the starting place of stenosis so as to meet the requirements on vertebral artery stenosis in clinic.

An improved aortic arch stent graft blood vessel includes an aortic stent blood vessel and three branch arterial stent blood vessels, wherein the aortic stent blood vessel is an approximately arc multi-segment structure formed by splicing a heart-proximal-end segment, a recessed segment and a heart-distal-end segment. The heart-proximal-end segment has an opening 1. An opening 2 is formed in the top wall of the recessed segment. An opening 3 is disposed in the heart-distal-end segment. Inner chimney brackets 1, 2, and 3 are fixed to the openings 1, 2 and 3 respectively. The three inner chimneybrackets are staggered in the axial direction. The three branch arterial stent blood vessels are disposed in the three inner chimney brackets respectively. The improved aortic arch stent graft bloodvessel can prevent the mutual interference between the two inner chimney brackets at the heart-proximal end when compressed, so that the aortic stent blood vessel is easy to be compressed and placed into a small-diameter delivery system, and a guide wire and a catheter are likely to select respective inner chimney brackets, so as to facilitate the delivery and the release of the branch arterial stent blood vessels.

The invention discloses functions and application of responsive to centrifugal force and shear stress gene 1 (RECS1) to treatment of restenosis after vascular injury. An RECS1 knockout mouse and a wild type mouse are taken as experimental subjects, and detection on mouse internal membrane regeneration, vessel wall cell proliferation level and smooth muscle cell phenotype transformation is carried out by a vascular injury model. Detection results prove that by virtue of RECS1 knockout, internal membrane regeneration and cell proliferation can be obviously inhibited, and smooth muscle cells are inhibited to be transformed into synthetic phenotype from contractile phenotype. Therefore, the functions of the RECS1 to the restenosis after vascular injury are mainly embodied in that internal membrane regeneration, cell proliferation and smooth muscle cell phenotype transformation are promoted by the RECS1. Aiming at the functions of the RECS1, the RECS1 can be used as a drug target for screening medicines for preventing, relieving and/or treating the disease of restenosis after vascular injury; an inhibitor of the RECS1 can be used for preparing medicines and arterial stents for preventing, relieving and/or treating the restenosis after vascular injury.

The invention discloses functions and application of SHPS1 in treatment of post-vascular injury restenosis, belonging to the field of functions and applications of genes. SHPS1 gene knockout mice and wild type mice are taken as experimental subjects, and due to a vascular injury model, the mouse neointima formation, vascular wall cell proliferation level and smooth muscle cell phenotype transform are detected. The result proves that SHPS1 gene knockout can obviously promote neointima neogenesis and cell proliferation and promote transformation of smooth muscle cells from a shrinkage manner to a synthetic manner. Thus the functions of SHPS1 in post-vascular injury restenosis are realized, which mainly shows that SHPS1 has the functions of inhibiting neointima formation and cell proliferation and inhibiting smooth muscle cell phenotype transformation. Aiming at the functions of the SHPS1, the SHPS1 can be used for preparing medicines and arterial stents for preventing, relieving and/or treating the post-vascular injury restenosis.

The present invention relates to the use of propionyl L-carnitine and the pharmaceutically acceptable salts thereof for the preparation of medicaments useful in the treatment of pathologies whose treatment gains a benefit from inducement of apoptosis, in particular blood vessels, such as restenosis after angioplasty or coronary stenting, or in particular tumors.

The invention relates to a coronary stent based hemorheological monitoring device and a coronary stent based hemorheological monitoring method. The device is characterized by comprising a coronary stent, an integrated circuit and external processing equipment; the coronary stent serves as an antenna, and the integrated circuit is fixed to a blood vessel of the coronary stent; the integrated circuit comprises an energy supply module, a hemorheological detection module, a memory, a data processor and a first radio-frequency transceiving module, and the energy supply module is used for supplying power to the integrated circuit; the hemorheological detection module transmits detected hemorheological signals to the data processor through the memory, and then the data processor converts the hemorheological signals into digital signals and transmits the digital signals to the external processing equipment through the coronary stent by the aid of the first radio-frequency transceiving module.

The invention discloses a vertebral artery stent. Aiming at the problem of restenosis after implantation of a stent of a starting portion of a vertebral artery, the vertebral artery stent with an asymmetric ellipse-like section is designed. The vertebral artery stent consists of annular supporting bodies which are longitudinally stacked and connecting ribs for connecting the adjacent annular supporting bodies. The two sides of the stent are divided into two arc-shaped side faces with large curvature and small curvature, different degrees of supporting can be carried out according to the characteristics of blood vessels of the starting section of the vertebral artery, the blood vessel walls are subjected to different supporting forces, an asymmetric blood vessel section is formed, and therefore, a hemodynamic environment in the blood vessel is changed. Meanwhile, in the stent, the large-curvature sides and the small-curvature sides of the adjacent annular supporting bodies are connectedthrough the connecting ribs having different structures, the directions of the stent can be distinguished conveniently, and therefore, the direction can be better distinguished when the stent is implanted into the blood vessel of the vertebral artery.

The invention relates to the technical field of vascular intervention, in particular to an infant pulmonary artery stent. The stent is of a balloon dilatation type and comprises a plurality of net-tube-shaped unit joints and connecting rods, wherein each unit joint comprises a plurality of joint rods connected end to end, and the unit joints define a ring; the connecting rods are connected to the adjacent unit joints, the number of the joint rods in each unit joint is 12-30, the connecting position of every two joint rods is in arc transition, the connecting rods are evenly distributed in the circumferential direction of the unit joints, the connecting position of one connecting rod is arranged with an interval of at least one arc transition, and the connecting positions of the adjacent unit joints are correspondingly connected through the connecting rods. The infant pulmonary artery stent is suitable for infants, has good flexibility and can meet the requirement for interventional therapy of infant patients.

The invention discloses a coronary artery stent implantation surgery image operation platform which comprises a supporting table, a rotating groove is formed in the supporting table, a rotating rod is rotationally connected to the rotating groove, a supporting rod is fixedly installed at the upper end of the rotating rod, a lifting groove is formed in the supporting rod, a lifting rod is slidably connected into the lifting groove, and a rotating shaft is arranged in the lifting rod. And moving blocks are fixedly mounted on the left side and the right side of the lifting rod correspondingly, moving grooves are formed in the left side and the right side of the lifting groove correspondingly, the two moving grooves are matched with the two moving blocks correspondingly, and sliding rods are fixedly mounted on the two moving blocks correspondingly. The medical image display device has the advantages that doctors standing at different positions can clearly check images in the body of a patient, so that the success rate of an operation can be improved to a certain extent, the mounting height and the vertical angle of the display screen can be adjusted according to needs, the doctors can better clearly check the images on the display screen, and the operation efficiency is improved. And the application range is wider.

The invention discloses a pulmonary artery stent convenient to control. The pulmonary artery stent convenient to control comprises a tubular supporting net frame, fixing pieces, a flowing out stent and at least two groups of aorta stents, wherein the supporting net frame consists of continuous regular hexagon rotating units, and top points located at two ends of the supporting net frame, of the rotating units are connecting points; each aorta stent comprises a supporting strip and four auxiliary strips, two ends of each supporting strip are respectively connected with two connecting points which are the farthest from each other, the four auxiliary strips are connected with four connecting points in the middle in a one-to-one correspondence, one end departing from the connecting points, ofeach auxiliary strip and the corresponding supporting strip are connected to one point, and the corresponding fixing piece is located at the connecting position of each supporting strip and the corresponding auxiliary strip; and the flowing out stent is located at the other end of the supporting net frame. According to the pulmonary artery stent convenient to control disclosed by the invention, the connecting lines between rotating units in the pulmonary artery stent convenient to control are long, every two adjacent rotating units rotate along the corresponding connecting line, during rotation, the rotation direction is stable and reliable, and accidental situations appearing in a mounting process can be effectively avoided and reduced.