3751results about "Stents" patented technology

An intra-vessel transcatheter filter device (1) designed to capture and remove emboli, thus preventing distal embolization, comprising: • a tubular filter (2) comprising a flexible porous material and defined by a distal element and a proximal element, namely a main body (3) and a funnel (4); i. said main body (3) having a length adapted to extend within a suitable vessel zone; said main body (3) comprising: a) a distal end (5) that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end (5) being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end (6); ii. said funnel (4) forming an extension of said main body (3), with the funnel base located at said proximal end (6). • a support structure assembly (8) comprising: i. a supporting catheter (11) extending within said main body (3), ii. one radially expandable distal structure (9) fixed to said distal end (5), iii. one radially expandable proximal structure (10) positioned in correspondence of said proximal end (6), said distal structure (9) and said proximal structure (10) being fixed at least in an end to said supporting catheter (11).

The invention discloses a human body intravascular positioning support, and relates to the field of medical instruments. Comprising a metal wire support which is used for expanding in a blood vessel of a human body to dilate the blood vessel, a plurality of positioning units are arranged on the metal wire support, and each positioning unit comprises a spring and a penetrating type positioning head fixedly connected with the far end of the spring; the near end of the spring is fixedly connected with the metal wire support, and the penetrating type positioning head is used for penetrating into the inner wall of a blood vessel to achieve positioning when the metal wire support is unfolded. Through the design that the spring is combined with the positioning unit of the piercing type positioning head, the unification of stable fixing and safe taking-out of the intravascular positioning stent is achieved.

The invention relates to a delivery device for delivering a self-expanding tubular implant and a system comprising the same. The conveying device comprises a pushing rod; at least one expandable body disposed at a distal end of the push rod, the expandable body configured to: axially elongate in a radially constrained contracted state; under the expansion state of releasing the constraint, radial expansion and axial contraction are realized; the elastic core wire is arranged in the expandable body in a penetrating mode and connected with the two ends of the expandable body, and the core wire is kept in a straight line shape in the natural state and the contraction state of the expandable body. The conveying device provided by the invention can be matched with a small-size micro catheter and can provide enhanced axial pushing force in the conveying process, so that the pushing efficiency and the operation stability of the tubular implant are improved; meanwhile, the radial expansion force provided by the expandable body can form effective auxiliary support for the implant, rapid wall attachment and stable expansion of the implant are promoted, and therefore the release effect of the implant is improved.

Neurovascular flow diverter and delivery systems, and methods of using the same are disclosed herein. The systems can include an introducer sheath, a catheter, a deployable flow diverter that can be contained in the introducer sheath or in the catheter, a core wire, and one or several deployment features coupled to the core wire and engaging the flow diverter. The deployment features can include one or more of a pusher, one or several friction bumps, one or several deployment coils, a claw mechanism, a self-expanding element, a supporting coil, a tip coil, and / or an atraumatic tip. One or more of the deployment features can be radiopaque.

The invention provides a braided stent, the ends of at least two adjacent braided wires which are spiral in the same direction in the braided stent are connected through a connecting structure, and the connecting structure is of a smooth structure; in this way, looseness and deformation of the end of the woven stent can be reduced, the risk of load shedding and withdrawing failure can be reduced, and the end of the stent is soft, moderate in supporting force and low in pushing resistance.

Devices and methods for providing a pathway for fluid to flow around a main lumen of a guide catheter are disclosed. As one example, a delivery apparatus can include a handle including an outer housing and a flush port coupled to the outer housing, a shaft extending distally from the handle, and a main lumen extending axially through the shaft, where the main lumen is fluidly coupled to the flush port via a flush lumen extending between the flush port and the main lumen. The delivery apparatus can further include at least one axially extending channel fluidly coupled to and radially offset from the main lumen, the channel extending between a first location that is adjacent to the flush lumen and a second location that is adjacent to a distal end of the shaft.

A prosthesis assembly includes a stent frame that is expandable and configured for being positioned in the ascending aorta, and a receiving socket positioned within a proximal end of the prosthesis assembly. The receiving socket defines a recess for allowing flowthrough of blood into the stent frame. The receiving socket is further configured for selectively receiving a heart valve assembly for replacing a native heart of a patient or maintaining a mode of operation where the socket is empty and blood flows through the socket into the stent frame.

The invention provides a degradable combined type tracheal stent and an implantation method, the degradable combined type tracheal stent comprises a plurality of rib plates which are coaxially arranged and are in an annular shape and soft bodies which are connected between every two rib plates and are in a net shape, and axial length adjustability and axial bending deformation of a stent main body are achieved through the soft bodies; the support further comprises a connecting part, the connecting part comprises a first connecting body arranged at the two axial ends of the support body and a second connecting body matched with the first connecting body, and the first connecting body and the second connecting body are matched to achieve axial detachable connection and combination between every two support bodies. The adjustable axial length of the stent main body, bionic axial bending deformation and stable connection and combination between every two stent main bodies are effectively realized. The invention further provides an implantation method of the degradable combined type tracheal stent, the implantation method comprises the steps of obtaining the size of the diseased trachea, determining the diameter and the combination number of the stent body, sleeving the diseased trachea and connecting the combination to complete implantation, and the method is easy to operate and can meet different requirements of clinical complex environments.

The invention discloses a left auricle plugging device provided with a real-time atrial pressure monitoring chip, and particularly relates to the technical field of left auricle plugging, the left auricle plugging device comprises a plugging device body and a connector, the top end of the connector is provided with a signal supply module, and the signal supply module is located in the plugging device body; according to the left atrial appendage plugging device, after the inductor in the nut generates a voltage signal, the signal can be transmitted to the low-noise operational amplifier and amplified, meanwhile, the electromagnetic interference between the noise of a circuit and the outside world is restrained, and the plugging device can be used for plugging the left atrial appendage of the left atrial appendage of the left atrial appendage. The physical deformation is converted into corresponding electric signals, the electric signals are transmitted to an in-vitro receiving terminal through an antenna, and a doctor can indirectly judge the recovery condition of the atrial contraction function of the patient according to the pressure signal trend.

The invention discloses a positioning support convenient to fix and safe to take out in a human blood vessel, and relates to the technical field of surgical operation medical instruments. According to the positioning support, a plurality of positioning thorns with tips are arranged on a metal wire support, and each positioning thorn comprises a metal inner wire and a coating layer; the inner metal wire is connected with a metal wire of the metal wire stent, the diameter of the inner metal wire is smaller than that of the metal wire of the metal wire stent, the coating layer is conical and is made of degradable materials, a preset distance is reserved between the tip end of the inner metal wire and the tip end of the coating layer, and a spiral part is formed in the middle of the inner metal wire; after the coating layer is degraded, the spiral part is changed into a stretching state from a compressed state, the metal inner wire penetrates into the blood vessel wall, and a preset gap is formed between the blood vessel wall surface and the surface of the metal wire stent. The support can be reliably fixed and safely taken out.

The invention provides a portal vein pressure adjusting support and a production method thereof, and belongs to the technical field of medical instruments.The adjusting support comprises a cylindrical support body, the support body is provided with a first section and a second section which are integrally arranged, and the side wall of the first section is provided with a film-shaped component used for sealing and isolating the outer side and an inner cavity of the support body; a pressure adjusting valve is arranged in an inner cavity of the first section, is opened for blood flow to pass through when the pressure in the portal vein is larger than a set threshold value, and is closed to cut off the blood flow when the pressure in the portal vein is smaller than the set threshold value; the stent can automatically adjust the opening and closing state of the shunt channel according to the portal vein real-time pressure, and ineffective shunt is reduced to the maximum extent while it is ensured that the portal vein pressure is reduced to a safe range, so that the occurrence risk of hepatic encephalopathy is reduced.

A stent device includes a stent formed in a tubular shape by weaving wires and a cover covering at least a part of the stent. The cover is partially bonded to parts rather than a whole surface of the stent.

Disclosed are valve replacement devices, systems, and methods. Valve replacement devices may comprise one- or two-piece systems comprising a receiver body (also called an adapter) and a valve assembly with replacement leaflets attached to and located within the receiver body. In two-piece systems, the valve assembly may be removable from the receiver body such that both can be delivered together or separately, and the receiver body may remain implanted while the valve assembly may be removed and replaced. Also described are devices, systems, and methods related to delivering, removing, and replacing a valve replacement. Such delivery methods may include transseptal insertion of a new minimum leaflet structure, and securement of the valve replacement using several securement type (e.g., supra-annular, sub-annular, radial, leaflet securement, etc.). Also described is a braided helical design that mimics the heart's natural movement, and a flange structure for assisting the functioning of the valve replacement.

A prosthetic heart valve includes a collapsible stent and a valve assembly disposed within the stent. A first cuff is disposed adjacent the stent. A second cuff having a distal edge facing the outflow end of the stent is disposed about the stent radially outward of the first cuff and the stent. The stent may include a plurality of fingers each having a first end coupled to a corresponding cell of the stent and a free end adapted to extend radially outward of the corresponding cell. The distal edge of the second cuff may be coupled to the fingers at spaced locations around the circumference of the stent to position the distal edge radially outward from the corresponding cells at the spaced locations. Various stent struts may be tapered to reduce the stent circumference in the collapsed condition, and to improve the fatigue resistance and / or bendability of the stent.

The present disclosure relates to implantable, mechanically expandable prosthetic devices, such as prosthetic heart valves, and to assemblies and methods for facilitating change in diameter of such prosthetic devices.

The invention provides an intravascular system and a method of delivering a tubular implant. The endovascular system includes a delivery device operable to deliver a tubular implant through a catheter. The delivery device includes a delivery wire, a set of stoppers including a distal stopper and a proximal stopper fixedly attached to the delivery wire, a coupling disposed between the distal stopper and the proximal stopper, and a protective cover enclosing at least an end portion of a tubular implant. A method of delivering a tubular implant is also described.

The invention relates to a self-expanding stent delivery device and a system comprising the same. The self-expanding stent conveying device comprises a pushing rod; the radial force storage structure extends in the axial direction and is arranged at the far end of the pushing rod, and an inner cavity extending in the axial direction is defined in the radial force storage structure; the positioning line extends in the axial direction and penetrates through an inner cavity of the radial force storage structure; the positioning line is in a natural state; the fixing components are at least arranged at the near end and the far end of the positioning line effective area, and the near end and the far end of the positioning line effective area are fixed to the cavity walls of the inner cavities at the near end and the far end of the radial force storage structure respectively. Through cooperative cooperation of the radial force storage structure, the positioning line and the fixing part, while the auxiliary expansion effect on the self-expanding stent is ensured, displacement of the fixing part possibly caused by release of the radial force storage structure is effectively restrained, and therefore reliable conditions are provided for accurate release of the self-expanding stent.

A loading device for crimping a prosthetic heart valve without an internal support member includes a cone having a cone body with a tapering diameter and defining a lumen therethrough and a cone base extending radially from the cone body. The cone base may couple to a funnel also having a tapering diameter and defining a lumen therethrough. The cone may be coupled to the funnel such that the lumen of the cone is aligned with the lumen of the funnel along a longitudinal axis of the loading device. The cone body may define a plurality of slots configured to receive the tines extending from the prosthetic heart valve as the valve is pulled through the loading device and compressed from an expanded state to a collapsed state by the tapering diameter of the cone and the funnel to be disposed inside a delivery device.

Devices, systems, and methods for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium are disclosed. Devices and methods include a method for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium, the method comprising: implanting a variable occluder in a coronary sinus region proximate a left atrium, wherein the variable occluder is configured to gradually increase a level of blood flow restriction over a period of days to enable a venous system of the myocardium to compensate for increased pressure caused by the gradual increase in the level of blood flow restriction; and following venous system compensation, shunting oxygenated blood flow into the coronary sinus to cause retrograde flow of oxygenated blood in at least a portion of the venous system of the myocardium to thereby enable revascularization of the myocardium.

A delivery system for delivering an implant having both a rigid portion and a flexible portion to a body lumen. The delivery system includes an outer tubular member and an inner tubular member slidably disposed within the lumen of the outer tubular member. The inner tubular member includes at least one opening positioned in a side wall adjacent to a distal end region. An expandable implant, including a rigid portion and a flexible portion, is disposed about the outer surface of the inner tubular member. A distal portion of a thread is wrapped around the flexible portion of the implant and configured to maintain the flexible portion in a radially collapsed configuration during delivery of the implant. A distal end region of the outer tubular member is disposed around the rigid portion of the implant to maintain the rigid portion in a radially collapsed configuration during delivery of the implant.

A stent, such as transluminal stent, is disclosed. The stent includes a tubular member with a proximal end, a distal end, and a central portion therebetween. The elongate tubular member comprises a scaffolding forming a plurality of cells and defining a lumen of the elongate tubular member. A proximal portion of the tubular member forms a retention member, wherein the diameter of the retention member is greater than the diameter of the central portion, and wherein a proximal end of the retention member includes an area of increased scaffolding density.

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 surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

A system for delivering an anti-migration anchor to an implantable device includes a locator system having a head portion adapted to mate with the neck portion of the device, a locator capsule coupled to the head portion, and a plurality of arms coupled to the head portion and the locator capsule, the arms having a collapsed and an extended configuration. The system includes a catheter having a distal portion coupled to and extending from the head portion. The system includes a handle coupled to a portion of the catheter, the handle having a mechanism to effect relative motion between an inner and an outer member of the catheter to cause the arms to transition from the collapsed to the extended configuration. The system includes a plurality of elongate elements having a distal end coupled to the arm and configured to facilitate the delivery of an anti-migration anchor to the arm.

The present disclosure relates generally to the field of medical devices and establishing fluid communication between body lumens. In particular, the present disclosure relates to devices and methods for placing the muscularis layers of first and second body lumens in contact to establish a long term or permanent open flow or access passage therebetween.

A delivery device for percutaneously delivering a stented prosthetic heart includes a sheath, a handle, and adjustment device including a fine adjustment mechanism, and an outer stability shaft. The sheath defines a lumen and is configured to compressively constrain the stented prosthetic heart valve. The handle is coupled to the proximal portion of the sheath and includes an actuator mechanism coupled to a proximal portion of the sheath that is configured to selectively move the sheath relative to the housing to release the stented prosthetic heat valve. The adjustment device is coupled to the handle and includes an adjustment lumen through which the sheath and the handle slidably extend. The outer stability shaft is coupled to the adjustment device. The fine adjustment mechanism is configured to selectively move the handle and the sheath relative to the adjustment device and the outer stability shaft.

Pulmonary treatment devices, systems and methods of use are provided which take into account the vast tissue damage of advanced COPD sufferers and provide treatments designed specifically to treat the particularly compromised lung tissues that are present in these patients. These treatments reduce trapped air volume, tension lung tissue and enhance lung elastic recoil. In particular, a variety of embodiments of pulmonary treatment devices are provided. The devices are comprised of a shape memory material wherein the devices are able to be expanded under tension, and then are able to recoil back toward an original relaxed or resting shape as the devices are deployed into the tissue. This action causes the pulmonary treatment devices to corkscrew into damaged tissue, becoming sufficiently entwined to allow pulling of the tissue by retraction of the device. This in turn re-tensions the lung causing lung volume reduction.

A system for crimping and expanding a medical device may include a delivery system with a handle, a catheter, and an inflatable balloon. A syringe may receive inflation media and may be configured to be received on a balloon inflation system and to be coupled to the delivery system. A crimper may have a collapsible iris assembly configured to receive the medical device therein. The crimper may be configured to mechanically couple to the balloon inflation system. The balloon inflation system may actuate the crimper to crimp the medical device onto the balloon when the medical device is received within the iris assembly. The balloon inflation system may be configured to actuate the syringe to advance the inflation media from the syringe to the balloon to expand the balloon and to expand the medical device that is crimped onto the balloon.

A novel sheath catheter is designed for broad applicability in intravascular percutaneous procedures, featuring a proximal hub, an elongate shaft, and a distal radiopaque marker band for enhanced visualization. The elongate shaft incorporates a tri-layer construction: a lubricious polytetrafluoroethylene (PTFE) inner polymer liner to minimize friction during device passage, a braided reinforcement skeleton for superior tensile strength and kink resistance, and a durable, wear-resistant outer jacket to withstand navigational stresses. This configuration yields a low-profile design with exceptional pushability, flexibility, and trackability, enabling access to small, tortuous vessels while maintaining structural integrity.

Covered stents may be coated with or otherwise include a drug eluting composition. An illustrative stent may comprise an elongated tubular body having a strut framework defining a plurality of open cells. A polymeric coating may be disposed on a surface of the elongated tubular body and extending across the plurality of open cells and a first drug coating composition disposed on a surface of the polymeric coating.