117 results about "Stent grafting" patented technology

An endoluminal prosthesis including a stent-graft formed of a stent and a base graft. The stent-graft is expandable in a radial direction of the endoluminal prosthesis and exhibits a self-expansion force in the radial direction such that the stent-graft is self-expanding in the radial direction from a compacted condition to a self-expanded condition. The endoluminal prosthesis further includes a radially restraining sleeve member having first and second ends and a middle portion, where each of the first and second ends are fixedly coupled to the stent-graft through a heat application process. The radially restraining sleeve member is adjustable to an adjusted diameter in the radial direction in a range of diameters between the self-expanded condition of the stent-graft and the maximum expanded condition of the stent graft through the application of an external force.

A stent assembly that is assembled in situ by separate delivery of two nested stents is configured to maintain a lumen in a bifurcated vessel. The stent assembly includes a first stent with a first opening at a first end, a second opening at a second end, and an intermediate opening on a lateral side of the first stent between the first and second openings. The stent assembly further includes a second stent with a first opening at a first end, a second opening at a second end and an intermediate opening on a lateral side of the second stent between the first and second openings. A portion of the second stent with the intermediate opening is nested within the first stent.

The present invention relates to a TIPS stent-graft comprising a tubular member having a lumen extending therethrough, the tubular member comprising a balloon-inflatable central section and first and second self-expanding sections sandwiching the central section, the lumen extending through the first section, the central section and the second section, the stent-graft being selectively collapsible of the central section.

A delivery system for an implantable device includes an elongate member and a main body coupled to the elongate member. The main body has a main body wall defining a main body lumen and a side branch portal through the main body wall. A guide member extends along at least a portion of the elongate member, into the main body lumen, and through the side branch portal. A guide member retainer assembly includes a retainer coupled to the guide member and defining a retainer eyelet. A release wire extends through a portion of the main body wall and the retainer eyelet to engage the retainer eyelet, restricting the guide member from being retracted along the elongate member by the engagement between the release wire and the retainer eyelet.

A tubular prosthetic device for implantation into a body lumen includes a first part including a tubular lumen and a second part including an attachment member. The second part is secured to the first part via various configurations, where the device is capable of being reduced to a diameter less than the diameter of traditional devices, for ease of use during implantation.Methods of using the device are also provided.

The present invention is related to a drug-coated covered stent the drug coated covered stent is a novel medical device designed to address Type III coronary artery perforations during percutaneous coronary intervention (PCI). This system combines a balloon-expandable stent covered with a biocompatible graft material and coated with cytotoxic drugs at its ends to prevent excess tissue growth and promote endothelialization. through a rapid exchange delivery system, the DCCS can be precisely positioned and expanded within the artery, sealing tears and promoting healing. The device's ultrathin profile and high flexibility enable navigation through tortuous vessels. Key components are a blocking balloon (201), second guidewire (203), covered stent (205), proximal and distal shafts of the delivery system (1, 2, 3, 15 4), stent (5), graft material (6), cytotoxic drug coatings (8, 9), and endothelialization (11). This innovative solution offers a promising approach to managing coronary artery perforations, potentially reducing the need for surgical interventions.

Disclosed is a stent graft, including a graft body, a sealing stent at the proximal end of the graft body and completely overlapped by the graft body, and a diameter reducing loop arrangement. The sealing stent includes proximal apices at a proximal end thereof and distal apices at a distal end thereof. The diameter reducing loop arrangement includes a loop element. The loop element includes a first end, a second end, and a strand section from the first end to the second end. The first end is attached to the distal end of the sealing stent. The loop element is configured to pass circumferentially around the distal end of the sealing stent and have a release wire pass through a loop at the second end. The diameter reducing loop arrangement is configured to constrict the distal apices of the sealing stent and cause the sealing stent to adopt a substantially conical or frustoconical shape.

Methods and devices for customizing perforations of a stent graft and re-sheathing the stent graft into a delivery system. A fenestration tool may be used to create a fenestration at a desired location on the stent graft. The fenestration tool has a harpoon that pierces the graft material, and a blade holder that surrounds the harpoon and spins to create a circular fenestration based on physician controls. To re-sheath the stent graft, the physician can slide a funnel over the stent graft, causing the stent graft to constrict and enter an attached crimp tube. The physician can remove this funnel and attach a second funnel to the stent graft cover. Manipulation of a handle of the delivery system can move the stent graft cover and attached funnel to force the constricted stent graft out of the crimp tube and into the cover.

The subject of the invention is a self-expanding, covered at least partially by a coating (16), endoluminal prosthesis, comprising: - a stent-valve part (1"), containing a metal frame (10) and an aortic valve (14) secured inside it, - a stent-graft part (1'), containing a metal frame (8, 8'), - an intermediate part (4), joining the stent-valve part (1") with the stent-graft part (1') and having less stiffness than the stent-valve part (1") and the stent-graft part (1'), wherein the stent graft part (1') comprises a tapered section (13) narrowing inwardly towards the intermediate part (4), the tapered section (13) is equipped with at least one branch (5', 5") covered by a coating (16).

Systems and methods for reloading a stent graft delivery device are disclosed. Additionally, a kit including a patient-specific fenestration template, fenestration rings and sutures can be provided for forming fenestrations in a preexisting, or generic, stent graft with the fenestrated stent graft then reloaded within the sheath of the delivery device for deployment within a patient.

A stent graft for treating an arterial aneurysm includes loops fixed to struts of stents, wherein the struts define distal and proximal apices. The ends of a ligature can be linked by a wire in a stent graft delivery system that threads anchor loops longitudinally spanning ends of the ligature to maintain the stent in a radially constricted position during delivery to the aneurysm. A delivery system and method for implanting a stent graft prosthesis includes and employs a torque component at a distal end of the stent graft prosthesis, whereby following advancement of the stent graft to a surgical site in a constrained or partially constrained configuration, torque is applied to the torque component to rotationally align the stent graft about a longitudinal axis of the stent graft, followed by deployment of the stent graft in correct rotational alignment. A delivery system and method of its use includes an apex capture assembly, a leg clasp, and a leg stop for capturing a stent graft during orientation and stabilization at an implantation site of a surgical site.

Systems and associated methods for minimally invasive creation of anastomoses, in particular the creation of anastomoses to the central vasculature, are disclosed. The systems comprise a delivery catheter configured for percutaneous transluminal insertion through a duct of a patient's body to a target region and a stent graft arranged within the delivery catheter. The stent graft comprises a main tube and at least one branch tube. The branch tube extends from a first end to a second end, wherein the first end is coupled to the main tube.

To provide simple yet accurate stent graft fenestration, a patient-specific fenestration template is used as a guide for graft fenestration. To generate the fenestration template, a patient's medical imaging data such as CT scan data may be used to generate a 3-D digital model of an aorta lumen of the patient. The aorta lumen may encompass one or more branch vessels, which may be indicated on the 3-D digital model. Based on the 3-D digital model or a segment thereof, the fenestration template may be generated, for example, using 3-D printing technology. The fenestration template may include one or more holes or openings that correspond to the one or more branch vessels. To fenestrate a stent graft, the fenestration template is coupled to the stent graft so that the holes or openings on the fenestration template indicate the fenestration locations.

Techniques and features to reduce air that may be released during deployment of an endoluminal device (e.g., a thoracic aortic stent graft device). In addition, methods for quantifying the effectiveness of pre-treatment techniques and features that reduce such air are discussed herein. This air reduction may help reduce the risk of air embolism occurring during deployment of a device (e.g., an implant, e.g., a stent graft), which may potentially reduce the risk of negative effects caused by such embolism.

The invention belongs to the technical field of medicine, and discloses a thoracic aorta in-situ fenestration and whole-course brain protection integrated device and method. According to the method, a bundling balloon is formed by a plurality of small balloons, the different small balloons are controlled to be inflated or shrunk under pressure relief, and the angle of a puncture needle is adjusted through the bundling balloon catheter. And the far-end protection umbrella covers the cluster balloon catheter and is used for preventing thrombus from escaping to the far end. According to the invention, the bundling balloon composed of a plurality of small balloons is designed, and the angle of the puncture needle is adjusted by controlling the different small balloons to expand by filling or shrink by releasing pressure, so that the time for an instrument to enter a membrane rupture window is greatly shortened, and the positioning accuracy of a membrane rupture point of the covered stent is improved; meanwhile, a far-end protective umbrella is arranged to prevent thrombus and other foreign matters from escaping to the far end.

[Problem to be solved] To provide a stent graft wherein interference between a stent row and a branch stent graft has been suppressed. [Solution] This stent graft comprises a stent including a plurality of stent rows and a graft that makes contact with the stent, the stent graft having, in a section of the graft, a fenestration part facilitating the insertion of a branch stent graft, which is another stent graft.

A stent, comprising a frame and a skirt (40) that covers the frame, wherein the stent comprises an axial opening (22) that penetrates the frame and the skirt (40).

The invention discloses a transcatheter aorta root covered stent system, and belongs to the field of covered stents.The transcatheter aorta root covered stent system comprises a catheter and a guide wire inserted into the catheter, a supporting mechanism is installed on the surface of the guide wire, a chimney mechanism is installed on the surface of the supporting mechanism, and a protection mechanism is installed in the chimney mechanism; through cooperative use of all the devices, the extrusion plate is pulled to extrude the elastic block, so that the elastic block deforms and is tightly attached to the hollow cylinder, the hollow cylinder is pushed out of the covered stent assembly, the hollow cylinder deforms and resets through the temperature in the body of a patient, and after it is guaranteed that the aorta true cavity is smooth, the hollow cylinder is reset. The covered stent assembly is pushed to be connected to the surface of the hollow cylinder in a sleeving mode and attached to the inner wall of the coronary artery opening, so that circulation of the aorta true cavity is smoother, and the situation that due to conflict between the unique anatomical structure of the aorta root and the mechanical effect of an interventional instrument, the aorta covered stent blocks the aorta root is avoided.

A bifurcated intravascular stent graft comprises primary stent segments and a primary graft sleeve, forming a main fluid channel and having a side opening therethrough. An external graft channel formed on the primary graft sleeve has a first end communicating with the side opening and an open second end outside the primary graft sleeve, thereby providing a branch flow channel from the main channel out through the side opening and external graft channel. The primary stent segments and graft sleeve engage an endoluminal surface of a main vessel and form substantially fluid-tight seals. The stent graft further comprises a secondary stent graft, which may be positioned partially within the external graft channel, through the open second end thereof, and partially within a branch vessel. The secondary stent graft engages the inner surface of the external graft channel and the endoluminal surface of the branch vessel, thereby forming substantially fluid-tight seals.

An endovascular prosthesis includes a stent having a plurality of radially expandable circumferential rings arranged along a longitudinal axis with a circumferential gap between the plurality of radially expandable circumferential rings. At least some of the expandable rings include cells comprising struts joined by a crown, and at least some of the cells or a midpoint in the struts of the cells has a radius R measured from the longitudinal axis of the stent, and a midpoint in a gap between circumferentially adjacent cells has a radius r measured from the longitudinal axis of the stent. After the stent radially expands up to 200% from the delivery radius, the outer surface of the stent maintains a roundness of at least 97% measured at r / R * 100, and the stent is configured to radially expand in situ from the delivery configuration to the deployed configuration in the target blood vessel.

This invention provides a portable covered closure system for vascular ruptures, belonging to the field of medical device technology. The output and input ports at both ends of the hollow slide rail are coaxially mounted with the guide holes of the gun-shaped handle; the hollow puncture needle is fixedly connected to the output port; the guide tube of the damper is coaxially fixedly connected to the input port; the short side of the T-shaped sleeve is embedded in the slide rail groove, and the long side has a through-hole groove for the short side; one end of the L-shaped pressure rod is hinged to the bottom end of the T-shaped sleeve, the corner of the L-shaped pressure rod is fixedly connected to the reset device, and the other end of the L-shaped pressure rod is hinged to one end of the L-shaped pull rod; the other end of the L-shaped pull rod is hinged to the trigger; the trigger is hinged to the hollow slide rail; a locking block is placed in the short side groove of the T-shaped sleeve, and one end is connected to the other end of the L-shaped pressure rod via a spring; the covered stent assembly passes sequentially through the damper, the short side groove of the T-shaped sleeve, and finally into the hollow puncture needle. This invention allows for precise insertion of the covered stent by pulling the trigger and rapid release to seal the rupture of a large blood vessel.

The invention relates to a prosthetic heart valve system (10) comprising a stent graft component (12), and a valve component (16). The valve component (16) comprises a stent frame (17) and a valve member (18), the stent frame (17) comprising an annulus section (22), an aortic section (23), and an intermediate section (24) located between the annulus section (22) and the aortic section (23). A cell area ratio of a cell area of a cell (50) in the row (19b) of cells in the intermediate section (24) to a cell area of a cell (30) in the row (19a) of cells in the annulus section (22) and / or of a cell (40) in the row (19c) of cells in the aortic section (23) is at least from about 2:1, preferably 3.:1, to about 5:1.

The present invention relates to a stent-graft-mounted blood leakage detection sensor, a manufacturing method thereof, and a wireless blood leakage detection system using the blood leakage detection sensor. According to an embodiment of the present invention, the a stent-graft-mounted blood leakage detection sensor is attached to the surface of the stent-graft, does not induce blood flow leakage or damage to the stent-graft, and allows a change in capacitance to occur in response to blood leakage so as to detect blood leakage occurring after stent-graft treatment, thereby enabling blood leakage (endoleak) to the outside of the stent to be monitored in daily life without medical imaging examination.

A blood-clearing and lipid-lowering pill is composed of the following ingredients in the indicated weight ratios: Astragalus membranaceus 54-74, Salvia miltiorrhiza 54-74, Paeonia lactiflora 54-74, Carthamus tinctorius 33-53, Pheretima aspergillum 54-74, Hirudo medicinalis 33-53, Crataegus pinnatifida 54-74, Polygonum multiflorum 54-74, Cassia tora 54-74, Gastrodia elata 33-53, Uncaria rhynchophylla 54-74, Eucommia ulmoides 33-53, Achyranthes bidentata 54-74, Os draconis 54-74, Ostrea gigas 54-74, Prunella vulgaris 54-74, and Alisma plantago-aquatica 54-74. This invention can reduce blood viscosity to normal levels in a short period, allowing some patients with vascular stenosis exceeding 75% who require stents to avoid stent grafting, and enabling stroke patients to gradually recover their function.

Additionally, a kit including a patient-specific fenestration template, fenestration rings and sutures can be provided for forming fenestrations in a preexisting, or generic, stent graft with the fenestrated stent graft then reloaded within the sheath of the delivery device for deployment within a patient.

A multi-lumen stent-graft including a graft portion and a stent frame. The stent-graft includes multiple through-channels formed of the graft portion. The graft portion can comprise a PTFE material and the through-channels can be formed of fused portions of the graft portion. The stent-graft can be used in a prostheses that connects multiple vessel branches such as for the repair of aortic aneurysms or other vessels of the body.

A stent graft system includes a first layer of graft material, a second layer of graft material, one or more stent members, one or more reducing belts, and a release wire. The one or more stent members are located between the first layer of graft material and the second layer of graft material. The second layer of graft material is formed to have a corresponding channel over each of the one or more stent members. The one or more reducing belts each include a loop at both ends and each is located in a corresponding channel around a corresponding one of the stent members. The release wire passes through both loops of each of the one or more reducing belts when the one or more stent members are in a compressed state. Pulling the release wire allows for the stent graft system to radially expand.

The application relates to a delivery device, a catheter assembly comprising an inner core tube and an outer sheath tube, the inner core tube movably assembled in the sheath lumen of the outer sheath tube, a constriction lumen being formed between the outer wall of the inner core tube and the inner wall of the outer sheath tube, the constriction lumen being used for constraining a stent graft, and an adjusting assembly comprising an adjusting wire, the adjusting wire movably arranged in the constriction lumen between the inner core tube and the outer sheath tube and used for detachably connecting with the distal end area of the small-curved side of the stent graft. A surgeon pulls the adjusting wire outside the organism to adjust the position of the distal end area of the small-curved side of the stent graft. During the adjustment, the large-curved side of the stent graft remains unchanged, the small-curved side of the stent graft deviates by a certain angle towards the proximal end, and the surgeon can judge whether the small-curved side of the stent graft is adjusted to the expected shape under the assistance of DSA imaging and other auxiliary means, so that the distal end area of the small-curved side of the stent graft finally forms a good endosial effect and the "bird beak" phenomenon is solved.