101 results about "Endovascular treatment" patented technology

A device for treating or preventing a vascular condition at a mammalian vascular site, comprises an implant formed from a compressible, reticulated elastomeric matrix in a shape conducive to delivery through a delivery instrument. One or more implants are delivered in a compressed state to the mammmalian vascular site where each implant recovers substantially to its uncompressed state following deployment from a delivery instrument. In a preferred embodiment the matrix comprises cross-linked polycarbonate polyurethane-urea or cross-linked polycarbonate polyurea-urethane. In another preferred embodiment the matrix comprises a cross-linked polycarbonate polyurethane. In a yet further embodiment, the matrix comprises thermoplastic polycarbonate polyurethane or thermoplastic polycarbonate polyurethane-urea.

An embolic occlusion device for the treatment of aneurysms and arteriovenous malformations comprises expanded polytetrafluoroethylene (ePTFE). The ePTFE permits ingrowth of cells with connective tissue deposition to promote adherence of the aneurysm wall to the embolic device thereby preventing continued growth or re-growth of the aneurysm as well as blocking blood flow into an aneurysm. An occlusion device is also described which comprises an embolic element and a polymeric pre-formed component.

An endovascular laser treatment device designed to be used with an optical fiber to treat venous diseases such as varicose veins is provided. The device includes a spacer that positions the distal end of the optical fiber away from the inner wall of the blood vessel during delivery of laser energy to provide an even distribution of thermal energy around the vessel, thereby avoiding vessel perforation and incomplete vessel collapse.

An occlusion device suitable for endovascular treatment of an aneurysm in a blood vessel in a patient, including a substantially tubular structure having a proximal end region and a distal end region, having a first, expanded condition and a second, collapsed condition. The device has dimensions in the second, collapsed condition suitable for insertion through vasculature of the patient and through a neck of the aneurysm. The device further includes a control ring having a substantially annular body disposed on the proximal end region of the structure and at least substantially circumscribing the proximal end region to prevent radial expansion of the proximal end region and to provide an engagement feature during manipulation of the occlusion device.

A method and apparatus to endovascularly treat blood vessels using a light beam that causes minimal collateral damage to surrounding tissue is described. The technique can improve the appearance of a blood vessel and / or reduce its size, as well as relieve other medical symptoms. The wavelength of the light beam can be selected so as to heat one or more chromophores either inside the blood vessel or within the blood vessel wall itself. Access to the vein lumen of the targeted blood vessel can be obtained via an optical fiber inserted into the blood vessel through a catheter.

The present disclosure relates to the field of endovascular treatment. More particularly, the present invention uses a modified hydrogel intrasaccular occlusion device designed to implement an endovascular treatment to ameliorating or eliminating aneurysm recurrence, which hydrogel may optionally be impregnated with pharmaceutical compounds. The present invention also teaches the use of thin hydrogel coatings to ameliorate endovascular treatment related difficulties.

An endovascular sheath device for use with a thermal treatment apparatus is provided. The device includes a longitudinal tube which is designed to receive a thermal treatment device and is designed to be inserted into a blood vessel. An ultrasonically visible reinforcement element is disposed along the length of the longitudinal tube. The reinforcement element such as a braided wire provides several functions including increased visibility under ultrasound, clearer identification of sheath tip, and increased durability to protect the fiber from needle punctures during tumescent injections into the perivenous space. The wire reinforcement also increases shaft torquability and kink resistance during sheath insertion and withdrawal.

An endovascular sheath device for use with a thermal treatment apparatus is provided. The device includes a longitudinal tube which is designed to receive a thermal treatment device and is designed to be inserted into a blood vessel. An ultrasonically visible reinforcement element is disposed along the length of the longitudinal tube. The reinforcement element such as a braided wire provides several functions including increased visibility under ultrasound, clearer identification of sheath tip, and increased durability to protect the fiber from needle punctures during tumescent injections into the perivenous space. The wire reinforcement also increases shaft torquability and kink resistance during sheath insertion and withdrawal.

A system for treating an aneurysmatic abdominal aorta, comprising (a) an extra-vascular wrapping (EVW) comprising (i) at least one medical textile member adapted to at least partially encircle a segment of aorta in proximity to the renal arteries, and (ii) a structural member, wherein EVW is adapted for laparoscopic delivery, and (b) an endovascular stent-graft (ESG) comprising (i) a compressible structural member, and (ii) a substantially fluid impervious fluid flow guide (FFG) attached thereto. Also described is an extra-vascular ring (EVR) adapted to encircle the neck of an aortic aneurysm. Further described are methods for treating an abdominal aortic aneurysm, comprising laparoscopically delivering the extra-vascular wrapping (EVW) and endovascularly placing an endovascular stent-graft (ESG). Also described are methods to treat a type I endoleak.

An endovascular laser treatment device for causing closure of a blood vessel uses an optical fiber adapted to be inserted into a blood vessel. An inner sleeve is arranged around a distal portion of the optical fiber core such that both distal ends of the inner sleeve and the optical fiber core form an enlarged light emitting face. The enlarged emitting face provides substantially lower power density while providing the same amount of total energy during a treatment session. An outer sleeve arranged around the inner sleeve acts as a spacer to position the light emitting face away from an inner wall of the blood vessel. The enlarged light emitting face and the outer sleeve acting as a spacer reduces the possibility of thermal run-away and device damage, and reduce the possibility of vessel perforations, leading to less bruising, post-operative pain and other clinical complications. In yet another aspect of the present invention, a spacer comprises an inner sleeve and an outer sleeve both arranged around a distal portion of the core to prevent the laser light from traveling laterally and to position the light emitting face away from an inner wall of the vessel. The inner sleeve can be a heat resistive material such as ceramic and the outer sleeve can be, for example, a metallic sleeve to provide structural integrity and strength to the distal section of the treatment device.

A method (100) of aneurysm analysis (110) and virtual stent simulation (120) for endovascular treatment of sidewall intracranial aneurysms.

The invention provides a sustained-release temperature-sensitive blood vessel embolic gel used for treating tumor. The sustained-release blood vessel embolic gel is prepared by entrapping a medicine by using a pharmaceutically acceptable carrier. The medicine is an anti-tumor medicine, and the pharmaceutically acceptable carrier comprises a gel prepared from poloxamer polymer, polyvinyl pyrrolidone, and the like or a composition thereof. The polymer material accounts for 5-65% of a gel mass. The particle size of the gel is in a range of 10nm to 150mum. The embolic agent is liquid gel under normal temperature, and can be used for direct injection through catheter. After injection into body, with the increase of temperature, the liquid gel is rapidly solidified into gel. Also, according to requirements, different medicines can be entrapped, and embolism and medication dual effect can be achieved through local sustained-release. Therefore, the gel provided by the invention can be used as an embolic agent for endovascular treatment, and can be used in various benign and malignant tumor transcatheter arterial chemoembolizations. The preparation method provided by the invention is simple, and is suitable for industrialized productions.

The present invention relates to an endoprosthesis for endovascular treatment of thoracic-abdominal aortic aneurysms or dissections, wherein the endoprosthesis has a proximal region, an intermediate region and a distal region, comprising five inner cylinders parallel to the longitudinal axis of the endoprosthesis, said inner cylinders, having elliptical apertures in the intermediate region. The present invention also relates to an endoprosthesis for endovascular treatment of abdominal aortic aneurysms or dissections which compromise the iliac arteries, wherein the endoprosthesis has a proximal region, an intermediate region and a distal region, comprising an inner cylinder parallel to the longitudinal axis of the endoprosthesis, said inner cylinder having an elliptical aperture in the intermediate region.

A Retrograde Entry Antegrade Placement (REAP) method and apparatus facilitate the antegrade (i.e., in the direction of blood flow) placement of endovascular devices for treatment of lower extremity arterial disease. Initially, a retrograde entry is made into the arterial system of a patient at an entry point with a curved needle, which then exits at an exit point proximal to the entry point, with a first wire then passed through the lumen of the curved needle. From the skin exit point, a Dual-Lumen Access Director (DAD) device is advanced in the antegrade direction down the first wire in a first lumen and enters the CFA 1 lumen. A second wire is passed down a second lumen in the DAD device and follows the SFA lumen in the antegrade direction. The DAD device is removed, and a standard dilator sheath is inserted over the second wire and the endovascular treatment begins.

The invention relates to a catheter for endovascular treatment on hypertension, in particular to a medical catheter for clinical endovascular intervention treatment on hypertension. The catheter has the functions of monitoring the temperature of the vascular tissue of the renal artery and measuring the local impedance of the tissue of the renal artery, and is used for carrying out feedback regulation on radio and high frequency current intensity to block bilateral renal sympathetic nerves and interdict sympathetic nerves to excite the kidney to generate and secrete renin-angiotensin, thereby achieving the purpose of reducing blood pressure. The catheter provided by the invention is made by compositing temperature plastic polymers and wire meshes, wherein the hardness of a near end is larger, a far end is softer, and multiple channels are formed in a catheter body; a far-end electrode is made from platinum (or gold) composite materials at the front end of the catheter, and multiple leads and drawing wires of the electrode are connected with a handle and a joint through the channels in the catheter body; and high-efficiency electrical isolation pipes and drawing pipes arranged in the channels of the catheter body ensure electrical signal transmission and smooth traction, thereby finishing bending and stretching operations.

An embolic occlusion device for the treatment of aneurysms and arteriovenous malformations comprises expanded polytetrafluoroethylene (ePTFE). The ePTFE permits ingrowth of cells with connective tissue deposition to promote adherence of the aneurysm wall to the embolic device thereby preventing continued growth or re-growth of the aneurysm as well as blocking blood flow into an aneurysm. An occlusion device is also described which comprises an embolic element and a polymeric pre-formed component.

Among the four heart valves, the mitral is the most frequently affected by disease resulting in defective valve opening (stenosis) or incomplete closure (insufficiency). Most often this is due to distortion of the valve apparatus secondary to rheumatic or degenerative disease. These lesions, called “organic” require open heart surgery. In patients with coronary disease or with dilated cardiomyopathy the mitral valve can be insufficient although structurally normal. These valves are “functionally” insufficient. Because of the poor condition of these patients where open heart surgery carries a significant operative risk, less invasive percutaneous alternatives are being explored today. The present novel invention represents a radical departure from other procedures because it repositions the posterior papillary muscle utilizing a device located in the interventricular veins.

An endovascular prosthesis containing radiopaque markers for identifying the position of the prosthesis and for detecting any twisting of the prosthesis inside a corporeal vessel. The prosthesis may be a graft having a graft body with a wall defining a lumen. A plurality of radiopaque markers are disposed on the wall of the graft, with each individual marker appearing identical under fluoroscopy regardless of the grafts orientation inside the corporeal vessel, but the relative positions of individual markers relative to each other in a set indicate the prosthesis position and orientation.

An occlusive device suitable for endovascular treatment of an aneurysm in a region of a parent vessel in a patient, including a structure having a fixed porosity and having dimensions suitable for insertion into vasculature of the patient to reach the region of the aneurysm in the parent vessel. The device further includes a frangible material supported by the structure which initially provides a substantial barrier to flow through the frangible material and is capable of at least one of localized rupturing and localized eroding, in the presence of a pressure differential arising at an ostium of a perforator vessel communicating with the parent vessel, within an acute time period to minimize ischemia downstream of the perforator vessel.

A medical device configured to perform an endovascular therapy can include an elongate manipulation member and an intervention member. The elongate manipulation member can include a distal end portion. The intervention member can include a proximal end portion and a mesh. The proximal end portion can be coupled with the distal end portion of the elongate manipulation member. The mesh can have a plurality of cells in a tubular configuration and being compressible to a collapsed configuration for delivery to an endovascular treatment site through a catheter and being self-expandable from the collapsed configuration to an expanded configuration. The mesh can include an anodic metal and a cathodic metal. The anodic metal and the cathodic metal can each form a fraction of a total surface area of the mesh.

An endovascular laser treatment device designed to be used with an optical fiber to treat venous diseases such as varicose veins is provided. The device includes a spacer that positions the distal end of the optical fiber away from the inner wall of the blood vessel during delivery of laser energy to provide an even distribution of thermal energy around the vessel, thereby avoiding vessel perforation and incomplete vessel collapse.

An introducer assembly for introducing a stent-graft (70) or other device into a vessel of a patient includes a pre-shaped curved cannula (60) made preferably of a shape memory material. The curved cannula can pull the proximal end (74) of the stent-graft (70) against the inner side wall of the vessel thereby to ensure a good leak free connection at this point. The assembly is particularly useful in deploying stent-grafts into the aortic arch.

The present disclosure relates to the field of endovascular treatment. More particularly, the present invention discloses a tool designed to implement an endovascular treatment capable of delivering medicine, such as amorphous hydrogel to wounds proximate to injury caused by endovascular treatment. Said hydrogel is affixed to an endovascular device.

An implantable medical device (30) for treating aortic dissections includes a stent graft part (34) having a bulbous section (48) of greater radial diameter than the radial diameter of first and second sections (60,62) of the stent graft part (34). The bulbous section (48) is able to close off the false lumen (10) of an aortic dissection, thereby to prevent any fluid backflow into the false lumen (10). Radiopaque markers (70) may be provided for orientation and deployment purposes. The device (30) is able to treat chronic dissections and reduce false lumen backflow, which remains otherwise an unresolved issue in the endovascular treatment of false lumen aneurysms.

A treatment sheath for use with an energy delivery device, such as an optical fiber, is provided with a heat insulative tip. The treatment sheath includes a longitudinal shaft which is designed to receive the optical fiber, and is inserted into a blood vessel to treat diseases such as varicose veins. During treatment, the energy emitting face of the optical fiber is positioned inside the heat insulative tip of the treatment sheath. The heat insulative tip protects the optical fiber emitting face during the delivery of laser energy and prevents the emitting face from inadvertently contacting the inner vessel wall.

The invention relates to a netty stent for endovascular treatment. An existing technical scheme for treating vascular dilation diseases by the aid of a netty stent includes that a plurality of netty metal stents are coaxially overlapped and metal thin wires are woven three-dimensionally, so that a three-dimensional netty stent is formed, the principle includes that the disorder state of blood in a dilated blood vessel cavity is changed by the netty stent, and lesions are promoted to be repaired by a natural blood coagulation mechanism. The technical scheme of the invention includes that on the basis of an existing vascular laminating film stent consisting of an elastic supporting frame and a laminating film, a flow limiting screen with a flexible three-dimensional structure is used for replacing the laminating film, and the supporting frame and the flow limiting screen are compounded internally and externally so as be connected integrally. The compound netty stent further can be manufactured into a separate combined type or integral branch stent. The compound netty stent has the advantages that the compound netty stent is easy in manufacture and flexible in implantation, and an anatomy channel of a lesion blood vessel can be recovered.

Systems and methods provide a novel computational approach to planning the endovascular treatment of cardiovascular diseases. In particular, the invention simulates medical device deployment and hemodynamic outcomes using a virtual patient-specific anatomical model of the area to be treated, high-fidelity finite element medical device models and computational fluid dynamics (CFD). In an embodiment, the described approach investigates the effects of coil packing density, coil shape, aneurysmal neck size and parent vessel flow rate on aneurysmal hemodynamics. A processor may receive patient clinical data used to construct the relevant anatomical structure model. The processor may access medical device models constructed using finite element analysis and three dimensional beam analysis, and simulates the deployment of selected medical devices in the anatomical structure model. The selected medical device models and the anatomical structure model mesh, allowing the processor to simulate hemodynamic outcomes using computational fluid dynamics.

A method of treating patients suffering from Alzheimer's disease by locating the areas of the brain affected by Alzheimer's disease and acting on the aforementioned areas of the patient's brain by laser energy through coronary blood vessels located adjacent to the aforementioned areas. The laser energy is delivered to the affected area through a set of microcatheters insertable sequentially and coaxially into each other and having diameters that allow insertion into distal coronary blood vessels.