1559results about "Blood vessels" patented technology

The invention relates to a covered stent and a stent system.The covered stent comprises a main stent body and a wrapping piece, the main stent body comprises a main corrugated ring and a main covering film, the main corrugated ring is covered with the main covering film, the wrapping piece is connected with the main stent body through a binding wire, the main stent body comprises a binding piece, and the binding piece is connected with the main stent body through a connecting wire. The binding piece comprises a part of the main body wave ring or comprises a binding line, the binding piece extends along the main body covering film, the main body covering film comprises a first through hole and a second through hole, and the first through hole and the second through hole are formed in the two sides of the extending direction of the binding piece respectively; and the binding wire passes through the first through hole and the second through hole and crosses the binding piece. The binding wire of the covered stent provided by the invention crosses the binding piece when penetrating through the main body covering film, when the covered stent is loaded or released, although the covering film and the main body covering film are pulled and stressed by the binding wire, the binding wire mainly pulls the binding piece, and when the binding wire is stressed, the possibility that film holes of the first through hole and the second through hole are expanded can be reduced, so that internal leakage is prevented.

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 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.

A system is provided for fenestration within a body lumen. The system includes an intraluminal device and a processor. The processor is configured to, from an imaging system, obtain a planning image including the lumen and a branch lumen extending from the lumen, and, in the planning image: identify a treatment device; identify a centerline of the branch lumen extending from the branch lumen to a desired puncture point on the treatment device; and identify a desired trajectory of the intraluminal device relative to the puncture point. The processor is also configured to, from a second imaging system, obtain a live procedural image including the lumen and the branch lumen; and in the live procedural image, identify the treatment device, the centerline of the branch lumen, the desired puncture point, the desired trajectory of the intraluminal device, and the actual trajectory of the intraluminal device.

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.

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.

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.

The invention provides a covered stent windowing device which comprises a sheathing canal, the sheathing canal comprises an adjustable bending section and a main body section, the adjustable bending section is arranged at the far end of the main body section, and a side hole is formed in the side wall, close to the adjustable bending section, of the far end of the main body section; the puncture assembly is arranged in the sheath tube and extends in the axis direction of the sheath tube; in a working state, at least part of the far end of the puncture assembly penetrates out of the side hole, and a window is formed in the covered stent. According to the scheme, various problems caused by the fact that the puncture assembly stretches out of the far-end port of the sheathing canal to conduct windowing operation are effectively avoided, the windowing position of the puncture assembly on the covered stent can be accurately positioned, the windowing position precision and the windowing success rate are improved, the use difficulty of an operator is reduced, and the windowing operation process does not need to be repeatedly adjusted.

The invention relates to an intracavity implantation system which comprises an intracavity prosthesis, the intracavity prosthesis has a radial expansion state and a radial contraction state, the intracavity prosthesis comprises a covered stent, a valve prosthesis and a flexible connecting pipe, the covered stent is of a tubular structure and comprises a main body section and a reducing section which are communicated with each other, and the valve prosthesis is arranged in the main body section. The main body section and the reducing section are arranged in the axial direction of the covered stent, the cross section area of the near end of the reducing section is smaller than that of the far end of the reducing section, the covered stent is further provided with a window penetrating through the side wall of the covered stent, and at least part of the area of the window is located in the reducing section; the valve prosthesis comprises a valve support and an artificial valve leaflet connected to the interior of the valve support. The flexible connecting pipe is of a tubular structure defined by a flexible film, the far end of the flexible connecting pipe is connected with the reducing section, the near end of the flexible connecting pipe is connected with the valve prosthesis, and the two axial ends of the flexible connecting pipe are communicated with the covered stent and the valve prosthesis respectively. In the implanting process of the endoluminal prosthesis, the relative position of the valve prosthesis and the covered stent can be adjusted according to the lumen structure, and the endoluminal prosthesis can better adapt to various lumen structures. In addition, due to the arrangement of the flexible connecting pipe, the risk that the far end of the valve prosthesis is driven to expand and deform due to expansion of the covered stent can be reduced, force generated in the expansion process of the valve prosthesis is not prone to being transmitted to the covered stent, and therefore the risk that coronary blood flow is blocked due to expansion of the near end of the covered stent can be reduced.

The invention relates to a stent system which comprises a tubular stent, a conveyor, a first stay wire and a second stay wire, the stent comprises a covered stent and a bare stent, the bare stent is arranged at the far end of the covered stent, one end of the first stay wire is connected with the conveyor, and the other end of the first stay wire penetrates out of the conveyor; the first stay wire extends in the circumferential direction of the bare stent after passing through the covered stent and is detachably connected with the bare stent, and the first stay wire moves to drive the bare stent to retract or expand; one end of the second wire drawing wire is connected with the near end side of the conveyor, the other end of the second wire drawing wire penetrates out of the conveyor, the covered stent extends in the circumferential direction of the far end of the covered stent and is detachably connected with the covered stent, and the movement of the second wire drawing wire can drive part of the covered stent to retract or expand. According to the stent system, after the stent is released, the stent can be shrunk again, and the stent can be positioned in the blood vessel again so as to be accurately released at the target position.

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 implanting a shunt for regulating blood pressure between a patient's left and right atria are provided. The shunt comprises an anchor having a neck region, first and second end regions, and a conduit affixed with the anchor formed of a biocompatible material that is resistant to transmural and translation tissue ingrowth and that reduces a risk of paradoxical embolism. The shunt may be advanced through the sheath until the first region protrudes from the sheath and self-expands within the left atrium. The shunt and the sheath may then be retracted until the first region contacts the left side of the atrial septum. The sheath may further be retracted until the counterforce exerted by shunt tension on the atrial septum overcomes the friction of the retained portions of the shunt such that the second region is exposed from the sheath and self-expands within the second atrium.

Various aspects of the present disclosure are directed toward apparatuses, systems and methods that include an implantable medical device an actuation line configured to steer the implantable medical device. The apparatuses, systems and methods may also include a releasable knot including portions of a tether to couple the actuation line to the implantable medical device.

Systems and methods for synthesis of covers for valvular prosthetics are described. Generally, covers can be synthesized via depositing, submersion, and / or printing. Covers can be synthesized directly onto a valvular frame or synthesized on a temporary substrate and transferred onto the valvular frame. Covers can be synthesized having one or more layers. The covers and the various layers can be synthesized or treated to obtain beneficial properties.

The invention provides a covered stent system which comprises a main covered stent comprising a positioning assembly and a windowing assembly, the windowing assembly comprises a first opening and a second opening, a first reinforcing structure maintains the first opening, and a second reinforcing structure maintains the second opening; the branch covered stent comprises a proximal end limiting stent and a telecentric section limiting stent; when the branch covered stent is connected with the main covered stent, the proximal section limiting stent and the telecentric section limiting stent are located on the two sides of the second reinforcing structure and are matched for limiting, and the sealing areas of the branch covered stent and the main covered stent are tightly attached to form sealed connection. Precise positioning, stable anchoring and effective sealing of the branch covered stent are achieved, meanwhile, the branch covered stent can be effectively prevented from protruding out of a main cavity, and therefore the risks of twisting, narrowing and blocking of the branch covered stent are reduced; the channel operability of subsequent intervention of the main cavity and the branch cavity is guaranteed; and the branch covered stent is prevented from blocking an opening adjacent to the branch artery.

A nested valved pipeline comprises an outer pipeline, a pipeline support on the inner wall of the outer pipeline and valve leaflets arranged on the pipeline support, 3-5 main ribs extend from the center of the root of each valve leaflet to the edge of each valve leaflet, secondary branch ribs are distributed among the main ribs, and the main ribs and the secondary branch ribs form reinforcing ribs for net-shaped supporting; the reinforcing ribs are embedded into the valve leaflets and are integrally formed with the valve leaflets; the root of the reinforcing rib extends to the attachment area of the valve leaflet and the pipeline support to form a T-shaped anchoring structure, an annular groove is designed in the edge, close to the root of the valve leaflet, of the pipeline support, the T-shaped anchoring structure of the reinforcing rib is embedded into the groove of the pipeline support, and a gap between the valve leaflet and the pipeline support is filled with biological glue; the pipeline support and the outer pipeline are combined and fixed in a physical and chemical mode. The valve leaflet falling risk is reduced, the fatigue life is prolonged, and the reflux and thrombus risks are reduced; due to the nested design of the outer pipeline and the pipeline support, the connecting difficulty between the valve leaflet and the outer pipeline is reduced, and 3D complex design and batch production of the valve leaflet are conveniently achieved.

The invention discloses a vascular endoprosthesis, comprising: a tubular body; the first film layer is attached to the tubular main body, the first film layer has extensibility, a constraint channel is formed in the first film layer, and the constraint channel spirally extends in the circumferential direction of the tubular main body; at least one part of the restraining part is arranged in the restraining channel, and the restraining part can move relative to the restraining channel; the portion, corresponding to the restraining piece, of the tubular body is a restraining section, the restraining section comprises an adjusting state, and in the adjusting state, the restraining piece and the restraining channel are arranged in the mode that the restraining piece is allowed to be fixed relative to the restraining channel through resistance, and the restraining section is at least partially contracted in the circumferential direction; when the restraining section is allowed to be subjected to expansion force, the restraining piece overcomes resistance and moves relative to the restraining channel, so that the circumferential contraction degree of the restraining section is reduced; and after the circumferential contraction degree of the constraint section is reduced, in the further expansion process of the first operation area of the constraint section, the part, corresponding to the target area of the constraint section, on the constraint piece is circumferentially contracted, so that the target area is contracted, and the first operation area and the target area are adjacent areas on the constraint section. The expansion degree of the endovascular prosthesis can be controlled, and the diameter of the endovascular prosthesis can be reversibly adjusted.

The invention provides a covered stent. The covered stent comprises a cutting stent and a covering film partially covering the cutting stent. The cutting support comprises a plurality of wave rings which are sequentially connected in the axial direction of the wave rings, and each wave ring comprises a plurality of foundation structures which are sequentially connected in the circumferential direction. The plurality of wave rings comprise z-shaped wave rings and double-n-shaped wave rings, and the z-shaped wave rings and the double-n-shaped wave rings are alternately arranged in the axial direction of the cutting support; the basic structure in the z-shaped wave ring is a first basic structure; the basic structure in the double-n-shaped wave ring is a second basic structure, and the second basic structure is a closed grid and is formed by butt joint of two n-shaped wave rods in the circumferential direction in a face-to-face mode. The covered stent has enough supporting performance, flexibility and adherence, internal leakage can be prevented, the thickness of the stent can be well controlled, and the covered stent can be conveyed and enter smaller blood vessels.

Apparatus and methods are described including implanting an aortic pressure-loss-reduction device in a subject's ascending aorta. A frame of the device includes a first set of sinusoidal struts disposed between a downstream end of an upstream anchor and an upstream end of the intermediate portion, the sinusoidal struts being shaped to form a folded portion between the downstream end of the upstream anchor and the upstream end of the intermediate portion. The frame includes a second set of sinusoidal struts disposed between an upstream end of a downstream anchor and a downstream end of the intermediate portion, the sinusoidal struts being shaped to form a folded portion between the upstream end of the downstream anchor and the downstream end of the intermediate portion. Other applications are also described.

A stent including a tubular body formed of one or more interwoven wires, a first anchor member disposed adjacent the first open end of the stent, a second anchor member disposed adjacent the second open end of the stent, and at least one divider disposed between the first and second anchor members. The first and second anchor members and the divider extend radially outward from the tubular body to divide the tubular body into at least a first saddle region extending between the first anchor member and the divider and a second saddle region extending between the second anchor member and the divider.

Devices, systems, and methods for marking and / or reinforcing fenestrations in grafts are disclosed herein. In some embodiments, a radiopaque marker for a graft is provided. The marker can be secured to the graft in the area near a fenestration such that the marker is visible via radiographic imaging. The radiopaque marker can be in the form of a radiopaque thread, a radiopaque bead, a radiopaque additive, or a radiopaque adhesive. In some embodiments, the radiopaque marker is in the form of a circular disc shaped and sized to surround a fenestration, the circular disc being formed of a radiopaque material. The radiopaque marker can be configured to or can be attached to a reinforcement member configured to reinforce a fenestration such that one or more edges of the fenestration are protected and / or to aid in engagement with and sealing to a mating stent.

A stent is disclosed that has an elongated body composed of a bioabsorbable polymer having a proximal end, a distal end, two open spiral channels formed on the exterior surface of the body to provide fluid communication between the proximal end and the distal end. The stent also has a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire. A method for using the stent and a kit containing the stent are also disclosed.

An implantable medical device for closure of a tissue tract / opening in a vessel wall includes a constraint disposed around and constraining the implantable medical device in a constrained configuration and one or more deployment lines attached to the constraint. A flexible hollow body is coupled proximate a midpoint of the implantable medical device. The implantable medical device and flexible hollow body are operable to transition (pivot) from a parallel, side-by-side arrangement to be substantially angled relative to one another. Retracting the one or more deployment lines causes the constraint to release the implantable medical device to transition from the constrained configuration to an expanded configuration.

A flow restriction system may include an implantable controller system for controlling an implantable flow restrictor. The controller system may include: an implantable housing, an actuator at least partially disposed within the implantable housing, the actuator having a first configuration corresponding to the implantable flow restrictor being in the low profile state and a second configuration corresponding to the implantable flow restrictor being in the high profile pressure restricting state, an internal power source configured to supply current to the actuator, and a processor configured to control operation of the actuator using power from the internal power source.

Chassis, especially for heavy offroad truck, is fitted with drivetrain, wherein the chassis contains central load carrying tube (207) with at least two axles (6-9) with swinging half-axles, where the chassis has at least one drive unit assigned as part of the drivetrain. The drive unit consists of electric motor (201), with assigned auxiliary gearbox (202), connecting load carrying tube (203) and axis differential (18-21), wherein the drive unit is always assigned to only one axle (6-9).

The utility model discloses a splenic artery blood flow limiting support, and particularly relates to the technical field of medical instruments, the splenic artery blood flow limiting support comprises a supporting support and a flow limiting support, the supporting support is sleeved outside the flow limiting support, two ends of the flow limiting support are fixedly connected with the inner side wall of the supporting support, the flow limiting support is a covered stent, and the flow limiting support comprises a contraction section and an expansion section. The contraction section and the expansion section are fixedly connected and communicated, and splenic artery blood flow in the supporting stent flows in from the contraction section and flows out from the expansion section. The splenic artery embolism postoperative spleen blood perfusion can be reduced, and the recurrence of splenic hyperfunction is reduced.