275 results about "Intra stent" patented technology

Apparatus and methods for an implant are provided. The implant may have a constrained configuration and a relaxed configuration. The implant may include an outer stent and an inner valve support. The inner valve support may be positioned within the outer stent. The implant may include a transition section spanning between the outer stent and the inner valve support.

Disclosed herein are devices for mechanically removing clot and / or other material from implants implanted in the vasculature of a patient, and associated systems and methods. In some embodiments, a system for removing clot material from an implant—such as a stent—includes a clot treatment device configured to be deployed within the stent, a handle, and a first elongate member and a second elongate member coupling the clot treatment device to the handle. The first elongate member couples a first end portion of the clot treatment device to the handle, and the second elongate member couples a second end portion of the clot treatment device to an actuator of the handle. Actuation of the actuator is configured to move the second elongate member relative to the first elongate member to move the first and second end portions toward one another to radially expand the clot treatment device.

A prosthetic heart valve for treatment of a diseased heart valve having native anterior and posterior leaflets that move between an open configuration and a closed position to regulate blood flow through the heart valve during a cardiac cycle of a heart. The prosthetic heart valve having a crescent shaped stent, at least one prosthetic leaflet mounted on an inner surface of the stent, and at least one prong structure coupling a portion of the at least one prosthetic leaflet to a lower ventricular portion of the stent frame. The prosthetic heart valve further having systems for anchoring the upper flared portion of the stent to a posterior portion of the native valve annulus.

The invention provides a recoverable intravascular stent, and belongs to the technical field of interventional therapy instruments. The stent comprises a first stent body, a second stent body and an isolation component, and the outer side wall of the first stent body is used for directly supporting a blood vessel and can automatically contract in the radial direction; the second stent is coaxially arranged on the inner side of the first stent and used for supporting radial expansion of the first stent; the isolation part is arranged on the first bracket and / or the second bracket and is used for reducing the friction force between the first bracket and the second bracket; when the stent is taken out, the second stent is gradually taken out from the inner side of the first stent, the first stent automatically and radially contracts in the process of losing the support of the second stent to reduce the embedding force with the side wall of the blood vessel, and the whole stent is conveniently taken out; the intravascular stent is mainly used for solving the technical problems that in the prior art, the intravascular stent is large in resistance and not easy to take out.

The invention particularly relates to a thrombectomy device, which comprises a capturing bracket, one end close to the far end of the capturing bracket is connected with a far-end spring, and one end close to the near end of the capturing bracket is connected with a pushing guide wire; the capturing bracket is formed by weaving a plurality of groups of weaving wires; one end of the thrombus breaking support is connected with one end, close to the far end, of the capturing support, and the other end is connected with one end, close to the near end, of the capturing support through a flexible wire; the thrombus breaking bracket is arranged in the capturing bracket; the flexible wires are straight wires or wavy wires; when the capturing support moves towards the near end, the thrombus breaking support moves along with the capturing support, elastically deforms and cuts thrombus located in the capturing support. The flexible wire can drive the thrombus breaking support to shake, and the thrombus breaking support in the shaking state has a better cutting effect on thrombus located in the capturing support. The metal coverage rate of the end, close to the far end, of the thrombus extraction device is increased through cooperation of the capturing support and the thrombus breaking support, and small thrombus is prevented from escaping towards the far end.

The invention discloses a biliary tract stent capable of being accurately released, which comprises a stent far end, a stent straight section and a stent near end which are connected in sequence, the number of layers of the stent is at least one, and the stent far end and the stent near end are made of materials with different colors. The number of layers of the stent is one, the materials of the stent far end, the stent straight section and the stent near end of the stent comprise but are not limited to silicone rubber, polyurethane, polyethylene, nylon or modified nylon Pebax, and the material hardness of the stent far end, the stent straight section and the stent near end of the stent ranges from Shore 25D to Shore 72D. Compared with a traditional stent of the same specification, the biliary tract stent capable of being accurately released has the advantages that the cross sectional area of an inner cavity is larger by 40%-100%, meanwhile, the inner surface of the stent is made of the super-smooth material, a biological membrane and bile mud are not prone to being attached, and the smooth time of the biliary tract stent is greatly prolonged.

Disclosed herein are devices for mechanically removing clot and / or other material from implants implanted in the vasculature of a patient, and associated systems and methods. In some embodiments, a system for removing clot material from an implant—such as a stent—includes a clot treatment device configured to be deployed within the stent, a handle, and a first elongate member and a second elongate member coupling the clot treatment device to the handle. The first elongate member couples a first end portion of the clot treatment device to the handle, and the second elongate member couples a second end portion of the clot treatment device to an actuator of the handle. Actuation of the actuator is configured to move the second elongate member relative to the first elongate member to move the first and second end portions toward one another to radially expand the clot treatment device.

A device for therapeutic ablative treatment of residual plaque on, in, and / or surrounding a stent within a blood vessel of a subject includes a jacket configured for insertion within a stent within a blood vessel of a subject. The device further includes an ultrasound transducer located within the jacket and having at least one active element oriented to deliver ultrasound energy in a radial and / or axial direction of the jacket from within the stent to ablate the residual plaque.

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 discloses a patient venipuncture auxiliary guiding device based on intelligent visual identification, the device is provided with a limb placing plate, the limb placing plate comprises a bottom plate and a silica gel lining plate, and a comfortable placing position can be provided for the limbs of a patient. The linear guide rail is installed on the right side of the top of the limb placing plate. The electric control sliding block can slide on the rail. The Z-axis lifting mechanism is connected with the electric control sliding block, the servo motor drives the lead screw to rotate, and the movable sleeve drives the right-angle type blood vessel imaging mechanism to ascend and descend in the vertical direction. The right-angle type blood vessel imaging mechanism is composed of two supports, a top blood vessel imager and a side blood vessel imager are embedded in the supports, imaging ports face the upper surface and the side face of the limb to be punctured respectively, and the direction and the depth of blood vessels can be clearly shown. In addition, a controller is installed on the side wall of the bottom plate and can control an electric control linear guide rail, an electric control sliding block and a servo motor, medical workers are assisted in accurately finding the blood vessel position, and the success rate of venipuncture is increased.

A transcatheter valve prosthesis including a tubular stent, a prosthetic valve component disposed within and secured to the stent, and a centering mechanism coupled to and encircling an outer surface of the tubular stent. The centering mechanism includes a self-expanding centering ring having an expanded diameter in the expanded configuration that is greater than an expanded diameter of the tubular stent in the expanded configuration and a plurality of self-expanding spokes radially extending between the tubular stent and the centering ring. The centering mechanism may include a base ring and / or a skirt. Alternatively, the centering mechanism includes a plurality of self-expanding loops. When each loop is in a delivery configuration the loop has a straightened profile that proximally extends from a proximal end of the tubular stent. When each loop is in an expanded configuration the loop has a U-shaped profile radially spaced apart from the tubular stent.

A microcirculation reconstruction bone implant capable of generating internal stress comprises a support shell and a support inner core. The support inner core is sleeved with the support shell, and the support shell and the support inner core form a matched structure. The stent shell is located between the bone tissue and the stent inner core, and the stent shell generates elastic deformation to generate internal stress and applies the internal stress to the surrounding bone tissue when the stent is implanted and loaded; a microcirculation reconstruction passage is also loaded on the stent inner core; by adopting a mode that the stent inner core is matched with the stent shell, the stent inner core is matched with the stent shell to form an elastic effect, so that internal stress can be continuously applied to bone tissues in postoperative application to promote bone growth and integration; and a complex stress environment can be adaptively adjusted, so that the stress compatibility between the implant and a bone tissue is ensured, new intraosseous circulation is established, and the postoperative healing effect after the implant is applied is promoted.

The utility model relates to the technical field of medical instruments, in particular to a cross-shaped bronchial valve. The cross-shaped bronchial valve comprises a main body support (1) and a one-way valve (2), the main body support (1) and the one-way valve (2) are integrally connected, and the one-way valve (2) is located in the main body support (1). The utility model has the advantages of simple manufacturing process, high yield and obvious treatment effect.

The present invention provides an individualized thoracic aortic stent system. The individualized thoracic aortic stent system includes an aortic arch stent and an ascending aortic stent. The anchoring area of the aortic arch stent is spliced and implanted into the ascending aortic stent, and the anchoring area of the ascending aortic stent is used as the anchoring area of the system. A first branch hole is pre-opened in the area of the aortic arch stent for connecting a branch stent, and the opening areas of the second branch hole and the third branch hole are locked with the first branch hole as a reference point, and the second branch hole and the third branch hole are opened in the opening areas. A movable, deformable or special-shaped framework structure is arranged in the opening area of the aortic arch stent. Through the splicing between the aortic arch stent and the ascending aortic stent, the anchoring area of the aortic arch stent is arranged in the ascending aortic arch stent, and the anchoring area of the ascending aortic stent is used as the anchoring area of the system, so that the anchoring area is moved forward to avoid the vascular branch fork, enabling the system to adapt to individuals who were previously unsuitable for anchoring.

The invention discloses a disposable suture type circumcision anastomat which solves the problems that in the prior art, during circumcision, prepuce is large in wandering degree, fixing operation is difficult, and the steps of suturing a prepuce wound are tedious. The device comprises a needle and thread support arranged on a penis coronary sulcus in a sleeving mode, a plurality of suturing mechanisms arranged in the needle and thread support in a sliding mode, absorbable sutures arranged in the suturing mechanisms and used for suturing a prepuce wound, a driving device arranged on the needle and thread support and used for driving the suturing mechanisms to move in a reciprocating mode, and a thread connecting support arranged on the needle and thread support. And the suture fixing bracket is sleeved on the penis and is used for fixing the absorbable suture sutured on the wound. According to the needle and thread support, the prepuce can be conveniently fixed during circumcision, the suturing mechanism is driven by the driving device to suture the wound of the prepuce, the wound of the prepuce can be conveniently sutured and fixed, and meanwhile the operation step of suturing the wound of the prepuce can be simplified.

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.

A replacement heart valve comprises a unibody, folded, double-wall stent, with a stent cover and a leaflet valve attached to the inner lumen of the stent. The heart valve is delivered using a multi-pulley, suture-based stent restraint assembly provided by fixed guide openings or structures along the distal end of the delivery system that independently permits expansion of the distal and proximal ends of the outer wall of the stent, and control of the inner wall expansion simultaneously with or separately from the expansion of the outer wall.

The invention discloses an intravascular stent bending torsion fatigue test device, and belongs to the technical field of fatigue test machinery. The intravascular stent bending torsional fatigue test device comprises a rack, the rack comprises a door-shaped support, a back plate and a base, the door-shaped support is provided with a bending load module, the bending load module comprises a first stepping motor, the output end of the first stepping motor penetrates through the back plate and is fixedly connected with an eccentric wheel through an extension shaft, and a pair of sliding blocks is additionally arranged; a sliding rail is arranged on the inner side of the door-shaped support, the sliding blocks are arranged on the sliding rail, a cantilever is connected between the pair of sliding blocks, the top of the cantilever is connected with the lower side of the top of the door-shaped support through a spring, a plurality of first loading connectors are arranged on the front face of the cantilever, and a torsion module is additionally arranged. The fatigue durability under bending-torsion dual loads can be tested, and the fatigue performance of the stent under the condition of blood vessel deformation during limb movement can be truly simulated.

The invention relates to the technical field of biomarkers, in particular to application of C1qa as a marker for diagnosing rapid recurrent coronary artery in-stent restenosis with unknown reasons. The invention relates to a biomarker for diagnosing rapid recurrence type coronary artery in-stent restenosis caused by unknown reasons. The biomarker is C1qa; and the serial number of the C1qa in the NCBI (National Center of Biotechnology Information) is NM001347465.2. Compared with traditional imaging detection, the C1qa biological detection method is more suitable for noninvasive or minimally invasive diagnosis, and invasive injury to patients is reduced. The expression change of C1qa may be earlier than the structural lesion of ISR, so that the C1qa can be used as an early biomarker of RECUR, and is suitable for screening high-risk groups.

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.

A prosthetic heart valve for replacing a native valve includes a stent extending between a proximal end and a distal end and including a plurality of struts forming cells, the stent having a collapsed condition and an expanded condition. At least one runner is coupled a cell, the at least one runner being configured to transition from a first configuration to a second configuration when the stent moves from the collapsed condition to the expanded condition, the at least one runner projecting radially outwardly from the cell in the second configuration. A valve assembly is disposed within the stent, the valve assembly including a plurality of leaflets, a cuff at least partially disposed on a luminal surface of the stent, and a covering material disposed on an abluminal surface of the stent and covering the at least one runner in the second configuration.

The application provides a recyclable vascular stent, and belongs to the technical field of interventional treatment instruments; the stent comprises a first stent, a second stent and a separation component; the outer side wall of the first stent is used for directly supporting a blood vessel and can automatically contract in a radial direction; the second stent is coaxially arranged on the inner side of the first stent and is used for supporting the first stent to expand in a radial direction; the separation component is arranged on the first stent and / or the second stent and is used for reducing the friction between the first stent and the second stent; when the stent is taken out, the second stent is gradually taken out from the inner side of the first stent, and the first stent automatically contracts in a radial direction in the process of losing the support of the second stent to reduce the embedding force with the side wall of the blood vessel, so that the taking out of the whole stent is facilitated; and the technical problem that the existing technology has a large resistance and is not easy to take out when the vascular stent is taken out is solved.

The invention provides a cardiology department nursing transfer bed, and relates to the field of transfer beds. The nursing transfer bed for the department of cardiology comprises a bottom frame, a support is arranged at the upper end of the bottom frame, a supporting plate is fixedly connected to the middle of the inner wall of the support, and a reinforcing rod is fixedly connected to the front end, close to the supporting plate, of the support. According to the invention, a synchronous electric push rod drives a cam rotating stand, a connecting rod and a connecting rotating rod to be linked, and the cam rotating stand and a fixed rod are matched structurally, so that the bed body is stably lifted and can be accurately matched with the heights of a ward bed, an examination bed and the like, and a servo motor, a screw rod, a threaded sleeve block, a hinge rod and an auxiliary rotating rod are matched to achieve a synergistic effect; the angle of the head plate can be stably and accurately adjusted, the first electric push rod achieves flexible adjustment and control of the leg plate to form a sitting posture state, the second electric push rod drives the whole bed body to rotate through the connecting frame and the rotating column, and physical load and operation risks are greatly reduced when nursing personnel transfer a patient.

The invention relates to a valve prosthesis which comprises a stent body and a valve leaflet, the stent body comprises an outflow end and an inflow end, the stent body comprises an inner stent and an outer stent, the inner stent is arranged in the outer stent, the valve leaflet is arranged in the inner stent, and the outflow end comprises a plurality of connecting points. The outer-layer stent and the inner-layer stent are connected with the connecting points after being connected at the outflow end or at the position close to the outflow end, a circle is defined by the multiple connecting points, the circle is provided with a circumference, the circumference is equally divided by the multiple connecting points, on one hand, it can be guaranteed that the outflow end of the stent body is of a symmetrical structure, and the stent body can be evenly compressed into a conveying sheath tube; on the other hand, it can be guaranteed that the stent body is evenly stressed when placed at the lesion position, and therefore the stent body is not prone to falling off.

An intravascular device and methods of using the same are provided. An expandable portion includes struts movable between a collapsed position and an expanded position, and tissue modification element(s), each having a lower portion residing within or attached to one of the struts, an upper portion which extends outwardly from an outer surface of the strut and physically interacts with tissue during use. Irrigation and / or suction device(s) are provided for providing at least one of irrigation fluid and suction force at the expandable portion when operated.

The present application relates to a kind of based on photodynamic therapy and radiotherapy and chemotherapy treatment stent and its preparation method.The present application includes stent body, stent body is mesh stent, mesh stent is provided with fixed frame, fixed frame includes the 4 support frames of cross arrangement, the cross point of 4 support frames is hinged connection.The present application is simple in structure, easy to make, convenient to use, can be made into different specifications and models, applicable to different tumor size, reduce the damage to normal tissue.

The utility model relates to the technical field of medical equipment, in particular to a thyroid surgery incision protection distraction device which comprises a neck protection support. A traction mechanism is arranged on the neck protection support, and a protection mechanism is arranged on the outer side of the neck protection support. The traction mechanism comprises two pasters, the pasters are arranged on the surface of the neck protection support, the inner sides of the two pasters are connected with traction ropes, the ends, away from the pasters, of the traction ropes are fixedly connected with piston rods, the outer sides of the piston rods are slidably connected with piston cylinders, the piston cylinders are fixedly connected into the neck protection support, and one sides of the piston cylinders are fixedly connected with air inlet nozzles. The arranged pneumatic traction mechanism pulls and opens an operative incision, the situation that the skin on the two sides of the incision is burnt by an ultrasonic knife is avoided, meanwhile, the pneumatic structure can reduce the traction strength, the arranged protection mechanism can protect the suture position after an operation, damage caused by collision to the affected part is reduced, and the operation safety is improved. The neck protection support can position the head of the patient, and it is avoided that due to rotation of the head of the patient, suture breakage is caused, and incision healing is affected.

The present invention relates to a peripheral vascular stent, which comprises a plurality of support units arranged at intervals and a membrane. Each support unit is formed by a silk thread and is a closed ring shape. Each support unit comprises a plurality of peaks and valleys that are centered on the axis of the peripheral vascular stent and are arranged periodically in the circumferential direction. Two adjacent peak tops form one cycle. The membrane is covered on the plurality of support units. The flexibility of the membrane is greater than that of the support unit. A plurality of hollowed-out areas are formed on the silk threads of the same support unit and / or on the membrane between two adjacent support units. Two adjacent support units are connected only through the membrane outside the hollowed-out areas. The vascular stent of the present invention can meet the mechanical property requirements under various deformation states of the lower limb artery, has appropriate radial supporting force and good flexibility, can well reduce the chronic outward expansion force in the vascular stent. The vascular stent of the present invention has little influence on blood flow, little damage to the inner wall of the blood vessel, and is not easy to cause secondary thrombosis formation.

The application relates to a kind of luminal stents and stent systems, the luminal stent includes main body stent, first recess portion, first inner branch, first through hole and second through hole;The main body stent includes first side and second side in the circumference, the first recess portion is arranged at the first side and is recessed towards the inside of the main body stent, the first inner branch is arranged at the proximal side of the first recess portion;The first through hole is arranged at the proximal side of the first recess portion and is communicated with the first recess portion, the second through hole is arranged at the distal end of the first recess portion and is communicated with the first recess portion, the first through hole, the first recess portion and the second through hole form an axial channel in the main body stent close to the first side.The luminal stent provided by the application is convenient to be transported, and the sheath core can pass through, the first recess portion can be positioned at the large bending side of the arch portion by the sheath core, so that the first recess portion is driven by the sheath core and corresponds to the arch upper branch port of the large bending side.

The liquid storage tank comprises a tank body and a tank cover, the tank cover is installed at the top of the tank body, a liquid inlet and an air outlet are formed in the top of the tank cover, a floating support is installed at the bottom of the tank cover and located below the air outlet, a floating groove is formed in the floating support, and a liquid outlet is formed in the floating groove. The floating groove is communicated with the air outlet, and a buoy is installed in the floating groove in a sliding mode. According to the blood storage tank, the air outlet is connected with an external thrombus suction pump, the liquid inlet is connected with an external matched thrombus suction catheter, the other end of the thrombus suction catheter is inserted into a blood vessel of a human body, and the end of the thrombus suction catheter reaches the thrombus. The buoyancy of the blood can enable the buoy to move upwards, so that the buoy blocks the air outlet, the blood can be prevented from entering a pump connected with the liquid storage tank through the air outlet, and the pump is prevented from being damaged due to the fact that liquid enters the pump.