6 results about "Iliac veins" patented technology

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.

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.

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 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.