15 results about "Iliac veins" patented technology

The utility model provides an iliac vein stent, which belongs to the technical field of medical instruments and comprises an inferior vena cava stent and a general iliac vein stent. The iliac general vein stent is connected with the inferior vena cava stent through a first connecting piece; the first connecting piece is a degradable connecting piece, and the inferior vena cava stent is allowed to be removed after the degradable connecting piece is degraded. The inferior vena cava stent has the advantages that the inferior vena cava compression problem can be solved by adding the inferior vena cava stent, the problem that in the prior art, an iliac vein stent cannot interfere with inferior vena cava compression is solved, and meanwhile the problem that thrombus is formed due to the fact that the iliac vein stent enters the inferior vena cava for better anchoring is avoided; meanwhile, the iliac general vein stent and the inferior vena cava stent are connected through the degradable connecting piece, the inferior vena cava stent can be removed after the degradable connecting piece is degraded, and interference of the inferior vena cava stent on the vascular structure is avoided.

The utility model discloses a vein double-layer covered stent which comprises a stent body, the stent body is of a tubular structure with a hollow tube wall, the whole stent body is lined with a double-layer covered film matched with an inner cavity of the stent body, a covered film cavity is formed between the double-layer covered film, and the covered film cavity is a cylindrical sealed cavity. The utility model is used for stent implantation after the patient with the pressed or blocked iliac vein is opened or the balloon is expanded, and conforms to the vein blood flow while keeping the iliac vein unobstructed for a long time, so as to relieve the obstruction of the outflow tract and maintain the unobstructed iliac vein for a long time.

A method of determination of a cause of hemorrhoids in a subject includes a determination of the presence of hemorrhoids in the subject by visual inspection, and by one or more of a non-invasive medical imaging procedure and / or an intra-vascular visualization procedure, determining if there is an obstruction or occlusion in an iliac vein of the subject, and if so, determining that the hemorrhoids were caused by such obstruction or occlusion. If the obstruction or occlusion are determined to be the cause of the hemorrhoids, a procedure for compressing the obstruction or occlusion in the iliac vein of the subject, such as by angioplasty or stenting, is performed. After an appropriate time period, changes to the hemorrhoids in the subject are determined by a subsequent visual inspection.

The invention discloses a left iliac total vein extravascular stent and an operation method, and belongs to the field of medical instruments. The stent comprises a middle section connecting sleeve frame, an inferior vena cava sleeve frame and a left iliac vein sleeve frame which are integrally formed, the included angle between the three is 135-145 degrees, an elastic silica gel limiting clamping belt is arranged and made of a silicon rubber material, and the crosslinking density and flexibility are regulated and controlled by adjusting the vinyl content. The surgical method comprises the following steps of: minimally invasive laparoscopic approach, implanting a stent after exposing a target blood vessel, and adjusting the position. Direct contact between the built-in stent and the intima is avoided, the intima hyperplasia and thrombus risks are reduced, fatigue resistance and creep resistance are achieved, the stent is attached to the anatomical structure, fixation is stable, minimally invasive recovery is fast, customizable adaptation can be achieved, and the clinical treatment effect and safety are improved.

An endoprosthesis for preventing venous collapse may include an expandable frame configured to transition between a radially collapsed configuration and a radially expanded configuration, and a plurality of anchor legs extending axially away from a first end of the expandable frame. The plurality of anchor legs may be configured to transition between a delivery configuration and a deployed configuration. In the deployed configuration, the plurality of anchor legs may be configured to extend radially outward from the expandable frame in the radially expanded configuration. A system for preventing vein collapse may include a delivery catheter having a lumen, an endoprosthesis disposed within a distal portion of the lumen in a radially collapsed configuration, and at least one filament coupled with a plurality of anchor legs of the endoprosthesis and extending within the lumen of the delivery catheter.

The application discloses a kind of luminal stent and its preparation method and application, and the stent includes front end, the front end constitutes the one end pipe body of stent, front end includes first part and second part, the first part and the second part are arranged along the circumference of the stent and are connected;Middle part, the middle part constitutes the pipe body of the stent, wherein, the part pipe body of the middle part is adjacent and is connected with the first part of the front end;And first transition, the first transition is between the second part of the front end and the middle part, and the second part of the front end is connected with the middle part by the first transition.The stent of the application has different performance regions in its axial or circumferential direction, meets the special luminal application requirements, and is particularly suitable for luminal stent for treating iliac vein stenosis disease.

This invention provides an iliac vein stent and its system. The iliac vein stent includes a main stent, an embedded branch, and a second branch. The main stent includes a main body and a first branch connected to the distal end of the main body. The embedded branch is folded and shaped and then placed within the main body, with a portion of its outer wall fixedly connected to the inner wall of the main stent. Compared to its natural state, the minimum distance between the embedded branch and the center of the main body is increased in the folded and shaped state. The second branch is embedded in the embedded branch and connected to the main stent. Because the embedded branch is folded and shaped and placed within the main body, the elastic recovery force of the embedded branch in the folded and shaped state is small or even negligible. When the compressed iliac vein stent is located within the sheath, the compressive and frictional forces between the embedded branch and the inner sheath core are reduced, effectively mitigating damage to the embedded branch from the inner sheath core.

The embodiment of the present application provides a kind of iliac vein stent, wherein, iliac vein stent has the morphology of collection and the morphology of expansion, the iliac vein stent includes: first part, it is suitable for when the morphology of collection is switched to the morphology of expansion, the first deformation variable along the axial direction of the iliac vein stent is generated;Second part, along the axial direction of the iliac vein stent with the first part is connected, it is suitable for when the morphology of collection is switched to the morphology of expansion, the second deformation variable along the axial direction of the iliac vein stent is generated;Wherein, one of the first deformation variable and second deformation variable is length increase deformation variable, and the other is length reduction deformation variable.The above technical scheme is used, and the deviation of iliac vein stent in the process of use can be reduced.

The utility model discloses an iliac vein stent which comprises a plurality of weaving wires, each weaving wire comprises a main body part, a first weaving part and a second weaving part which are integrated, the main body parts extend in the axial direction, and the first weaving parts and the second weaving parts are connected at the two ends, relative to the axial direction, of the main body parts respectively; the first weaving part and the second weaving part extend oppositely until the end parts, far away from the main body part, of the first weaving part and the second weaving part are connected to form a connecting point; wherein all the connecting points are sequentially arranged in the axial direction. According to the iliac vein stent, the connecting points are sequentially arranged in the axial direction, so that the whole stent has good structural integrity, and the wall attaching performance and the supporting capacity of the whole iliac vein stent are improved.

The invention relates to an asymmetric vein stent capable of increasing friction force in an anchoring area, which is characterized in that a near-end petal-shaped stent is positioned at the confluence of double iliac veins at the near end of the vein, and a high-radial-supporting-force stent is positioned at the total iliac vein; the far-end woven stent is positioned at the far end of the iliac total vein and the iliac external vein and is a woven stent with high flexibility, and a high-friction metal wire is woven into the far-end woven stent; the radial support force of the three parts of the stent is gradually increased according to the sequence: the near-end petal-shaped stent, the strong radial support force stent and the far-end woven stent; the far-end woven stent is woven by metal wires, and the expansion diameter of the stent is slightly larger than the target vein diameter but smaller than that of the stent with the strong radial supporting force. The partial expansion diameter of the high-friction metal wire and the contact area of the high-friction metal wire and the blood vessel wall are larger than those of the common woven stent metal wire; the group of metal connecting short rods are connected with the strong radial supporting force stent and the far-end woven stent through laser welding.

This invention discloses an iliac vein stent assembly capable of filtering thrombi, relating to the field of vascular stent technology, and particularly to an iliac vein stent assembly capable of filtering thrombi. It comprises an iliac vein stent and a vena cava filter. The iliac vein stent is bifurcated; the long and short branches of the stent are released into the left and right iliac veins respectively, and are fixed to the main stent with barbs. The main stent is released at the common iliac vein at the confluence of the left and right iliac veins. The fixing ring serves as the anchor point for the vena cava filter, connecting the vena cava filter and the iliac vein stent together to form a stent assembly. The vena cava filter's claws and support frame are made of the same shape-memory metal tube, and the connecting rod is a nickel-titanium tube body. The claws rotate within the fixing ring, and the connecting rod moves back and forth within the fixing ring. This invention comprehensively solves iliac vein compression syndrome, effectively prevents stent displacement during postoperative recovery, and prevents postoperative thrombus flow to the pulmonary artery, making it suitable for patients with contraindications to thrombolysis.

A method of using non-contrast magnetic resonance angiography (NC-MRA) to generate pelvic veins images and measure rate of blood flow includes the ordered steps of: (a) performing a non-contrast magnetic resonance scan in cooperation with an electrocardiogram monitor and a respiration monitor; (b) obtaining two-dimensional images of kidney veins, lower cavity veins, common iliac veins, and external iliac veins using use balanced turbo field echo wave sequence; (c) obtaining three-dimensional images of common cardinal veins of the abdominal cavity using fast spin-echo short tau inversion recovery wave sequence and using sample signals from the electrocardiogram monitor during myocardial contractility; and (d) using quantification phase-contrast analysis to measure blood flowing through the transverse sections of the veins in a two-dimensional scan.

The invention discloses a tissue support device, and relates to the technical field of medical instruments, the tissue support device comprises a support main body, two ends of the support main body are respectively provided with a wire harness hole I and a wire harness hole II, and the support main body is provided with a plane section; a mounting hole is formed in the plane section, a first adjusting ring and a second adjusting ring which can rotate relatively are mounted in the mounting hole, and ratchet wheel structures which are symmetrically arranged are arranged on the first adjusting ring and the second adjusting ring; a rotation stopping hole structure is arranged on the plane section and positioned on the outer side of the mounting hole; the first adjusting ring and the second adjusting ring are provided with sliding block structures. A first groove and a second groove are formed in the positions, corresponding to the first sliding block and the second sliding block, of the stent body, the radial size and the axial size of the peripheral stent can be adjusted according to the iliac vein blood vessel size of the pressed position, the requirement for preventing the iliac vein blood vessel stress syndrome of different stress sizes is met, and the device is simple and clear in structure, convenient to use and high in practicability. Disassembly and assembly are convenient, and operation is easy.

A device comprising: a catheter or implanted device having a tip configured to be located within the distal JVC, between the confluence of the common iliac veins and the testicular / ovarian veins; and a flow restriction mechanism at or near the tip of the catheter or implanted device configured to be inflated with fluid or gas, and deflated by a control unit in order to optimize cardiac preload and cardiac output.

A method of determination of a cause of hemorrhoids in a subject includes a determination of the presence of hemorrhoids in the subject by visual inspection, and by one or more of a non-invasive medical imaging procedure and / or an intra-vascular visualization procedure, determining if there is an obstruction or occlusion in an iliac vein of the subject, and if so, determining that the hemorrhoids were caused by such obstruction or occlusion. If the obstruction or occlusion are determined to be the cause of the hemorrhoids, a procedure for compressing the obstruction or occlusion in the iliac vein of the subject, such as by angioplasty or stenting, is performed. After an appropriate time period, changes to the hemorrhoids in the subject are determined by a subsequent visual inspection.