38results about "Ureters" patented technology

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.

The present invention provides constructs including a tubular biodegradable polyglycolic acid scaffold, wherein the scaffold may be coated with extracellular matrix proteins and substantially acellular. The constructs can be utilized as an arteriovenous graft, a coronary graft, a peripheral artery bypass conduit, or a urinary conduit. The present invention also provides methods of producing such constructs.

A packaging system (10b) is provided that includes a packaging body defining a cavity (14b) and a seal (18b) configured to be joined to the packaging body to fluidly seal the cavity. The packaging system may also include at least one tissue cradle (16b) configured to be disposed within the cavity. A cavity having a single size may be configured to accommodate differently sized tissue cradles. In addition to the cavity the packaging system may include one or more additional reservoirs configured for holding a volume of liquid. Such packaging systems may be used in the storage of wet-preserved or dry-preserved human or animal tissue. Also provided are a packaged tissue specimen and a method for packaging tissue.

The invention relates to a device (1000) for extracting a stent, in particular a ureteral stent, comprising: a casing portion (199) which is tubular and is connected, at a first end, to a handle portion (300) and has an opening (110) at the second end opposite the handle portion (300); and a catching element (200) which can be moved at least translationally in the casing portion (100) in the longitudinal direction of the casing portion (100) and has a catching portion (210) at the end thereof facing the opening (110) of the casing portion (100), the catching portion being designed to be brought into engagement with the stent. The catching portion (210) is designed in such a way that, after the catching portion (210) has been pushed out of the casing portion (100), the catching portion (210) can be folded down with respect to the rest of the catching element (200).

The present disclosure relates to a gastrointestinal delivery device of a chitosan dressing, where the delivery device is capable of stop bleeding, in particular in connection with TURP procedures. The delivery device may be used in all gastrointestinal bleeding applications and can be used with a biocompatible, foldable, thin profile, chitosan dressing. Various aspects of the device and its uses are provided herein.

A urinary drainage prosthesis for patients following radical cystectomy, characterized in that it comprises a tube which is made of a hydrophilic matrix made of polypropylene or polyester mesh in the shape of a tube, ended with a collar on one side made of micro and / or nanofiber nonwoven fabric prepared from a synthetic fiber-forming polymer or copolymers, natural polymers such as esters and ethers of cellulose, collagen, gelatin, fibrinogen, natural silk, coated on the internal surface with a layer of cross-linked sodium hyaluronate of the average molecular weight from 2000 kD to 2 500 kD in the form of a film with an addition of the plasticizer - a polyol and on the external surface with a layer of type I collagen of the animal origin of the average molecular weight from 250 kD to 350 kD in the form of a nanofiber layer, whereby the sodium hyaluronate layer amounts from 15% w / w to 25% w / w, preferably 20% w / w of the mass of the prosthesis, and the collagen layer - from 20% w / w to 40% w / w, preferably 30% w / w of the mass of the prosthesis.

A ureteral stent and a manufacturing method of a ureteral stent are applied to the technical field of medical instruments, to effectively reduce ureteral stent failure in fluid guiding. The ureteral stent comprises an inner structure (200), and an outer structure (100) sleeved on the inner structure (200), wherein the outer structure (100) is a tube-shaped structure, and the outer structure (100) is made from a first wire (110). The ureteral stent can effectively reduce ureteral stent failure in fluid guiding.

A stent is disclosed that is configured to maintain patency of the prostatic urethra despite an enlarged prostate. The stent can include a handle that, in an undeflected position, is disposed outside of the flow path of the stent. When the handle is pulled, the handle can deflect to generally aligned with a central axis of the stent. A capture device is disclosed that includes a tapered tip to navigate a working channel of a delivery device and a hook that can capture the stent handle and be moved into a tube to retain the stent handle to facilitate maneuvering of the stent in and out of the working channel of the delivery device. A loading adapter with a tapered port is disclosed that can be disposed on the delivery device to distribute compressive forces applied by the port on the stent during loading into the working channel.

Medical implants that include a containment layer surrounding, or surrounded by, a biodegradable medical device provide the benefit that pieces formed during degradation of the medical device are held within a constrained place and thus do not causes injury to a hosts.

A drainage stent delivery system is disclosed. The drainage stent delivery system includes a catheter body, a stent member, and a coupling member. In some embodiments the coupling member can include keyed connectors having a non-round shape to facilitate a 1:1 rotation ration of the catheter body and the stent member. In another embodiment, the coupling member can include a telescoping connector having an inner tube and a release wire disposed through the inner tube. A distal portion of the release wire has an outer diameter greater than an inner diameter of the inner tube such that the telescoping connector can be displace by the release wire. In another embodiment, the stent member includes a proximal retention member having arms that are outwardly extendable.

Systems, apparatus, and methods for delivering an implant into the prostatic urethra are provided. Embodiments of the delivery system may include a delivery device for insertion into a patient and a proximal control device for controlling the release of the implant from the delivery device.

A stent for insertion into the lumen of an anatomical vessel or duct including a helical coil embedded in a polymer tube. The helical coil includes expandable part, which is able to be in a compressed or expended configuration. The polymer tube is radially rigid to prevent reduction of the diameter of the turns of the helical coil when the stent is twisted.

The invention discloses a self-adaptive urinary system narrow part expanding and supporting integrated instrument which comprises an outer tube and a balloon layer, the balloon layer is of a spirally compressed tubular structure in the initial state, and the top end of the outer tube is fixed to one end of the balloon layer in a butt joint mode through a connector structure; the connector structure comprises a liquid feeding connector correspondingly fixed to the end of the outer tube in a penetrating mode, a conveying guide wire is fixedly installed in the center of the top of the liquid feeding connector, a liquid guiding and conveying cavity of the balloon layer is filled with the conveying guide wire, a telescopic ball head is arranged at the top end of the conveying guide wire, and the telescopic ball head is connected with the conveying guide wire. According to the self-adaptive expanding and supporting integrated instrument for the narrow part of the urinary system, the expanding balloon function and the supporting skeleton function are integrated into one instrument, implantation is achieved after expanding, the operation steps are simplified, the operation time is shortened, and the pain of a patient and the medical cost are reduced.

The present invention provides constructs including a tubular biodegradable poly glycolic acid scaffold, wherein the scaffold may be coated with extracellular matrix proteins and substantially acellular. The constructs can be utilized as an arteriovenous graft, a coronary graft, a peripheral artery bypass conduit, or a urinary conduit. The present invention also provides methods of producing such constructs.

A packaging system for use with a ureteral stent having an elongated shaft extending between a proximal end portion and a distal end portion may include a tray base. The tray base may include at least one first post, a second post, and a projection or a groove configured to respectively secure the distal end portion, the proximal end portion, and a tether of the ureteral stent on the tray base.

The present invention provides an anti-reflux ureteral stent. A leaflet-shaped structure is arranged on a side wall of the stent at a bladder end to achieve a one-way drainage function, and the leaflet-shaped structure defines a lumen of the stent in a cross-section along with a tube wall of the stent. The outer surface of the leaflet-shaped structure is larger than the inner surface thereof. When the external pressure of the leaflet-shaped structure is larger than the internal pressure of the leaflet-shaped structure, the leaflet-shaped structure is attached to the tube wall, and the tube wall supports the leaflet-shaped structure, thereby sealing the lumen. The present invention can achieve, by means of the leaflet-shaped structure, one-way drainage in the ureteral stent, so as to effectively achieve an anti-reflux effect.

This disclosure generally relates to the field of medical devices. More specifically, this disclosure relates to the delivery of a variable-length stent within a patient's body. In one example, the stent may include a body comprising a coil in a generally helical pattern about a longitudinal axis of the stent and along the length of the stent between a proximal and distal end. The coil may define a lumen along a longitudinal axis passing through the center of the body. A distal tube may have a wall extending from the distal end of the body. A first orifice may extend through the wall of the distal tube into the lumen. A distal retaining member may extend from the distal tube. A distal suture may have an intermediate portion. The intermediate portion may extend through the first orifice.

The anti-backflow and anti-displacement woven ureter covered stent comprises a stent body formed by splicing a plurality of metal wire woven units in the circumferential direction, and the stent body sequentially comprises a first anti-displacement section, a radial supporting section, an anti-backflow section, a bundling extension section and a second anti-displacement section from the far end to the near end. The diameter of the first anti-displacement section is gradually increased from the near end to the far end, the anti-backflow section is connected with the far end of the bundling extension section through a funnel-shaped structure, an anti-backflow structure is arranged at the funnel-shaped structure, and the second anti-displacement section is composed of a plurality of metal wire anchor hooks. Each metal wire weaving unit on the radial supporting section is composed of a plurality of circumferential wave sections and axial straight line sections which repeatedly appear in the axial direction, and every two adjacent metal wire weaving units on the radial supporting sections are spliced and fixed through first locking pieces locked on the axial straight line sections close to each other. The support has the advantages of being high in axial supporting capacity and radial supporting capacity, good in durability, and meanwhile good in backflow resistance and displacement prevention capacity.

Implantable medical devices have zones of high in vivo stability that are adjacent to zones of relatively low in vivo stability, so that when these medical devices are implanted into a host, the zones of low in vivo stability degrade first and allow the formation of independent segments of relatively intact high in vivo stability bands that are sufficiently small that they may pass from the host in a non-harmful manner.

A packaging system (10b) is provided that includes a packaging body defining a cavity (14b) and a seal (18b) configured to be joined to the packaging body to fluidly seal the cavity. The packaging system can also include at least one tissue cradle (16b) configured to be disposed within the cavity. A cavity having a single size can be configured to accommodate differently sized tissue cradles. In addition to the cavity, the packaging system can include one or more additional reservoirs configured to hold a constant volume of liquid. Such packaging systems can be used for storing wet- or dry-stored human or animal tissue. Packaged tissue specimens and methods for packaging tissue are also provided.

Tubular structures, apparatuses, and methods for making tubular structures are disclosed herein. Walls of the tubular structures can include a hydrogel. A luminal material extends through the tubular wall. A cell population can live in the luminal material, the tubular wall, and / or on an outer surface of a tubular structure. Apparatuses for making tubular structures can include one or more inner extrusion nozzles removably positioned coaxially within one or more outer extrusion nozzles. The outer extrusion nozzle can be removably or permanently positioned within a housing of the apparatus, positioned above a column-shaped container. Methods of making a tubular structure can include coextruding a wall solution and a luminal solution into the column-shaped container and polymerizing the wall solution into a tubular structure. In some aspects, a light source can be configured to illuminate a light-permeable wall of the container or the nozzles for the purpose of polymerizing the wall solution.

The present disclosure relates to a device 1000 for extracting a stent, in particular a ureteral stent, comprising: a sheath section 199, which is tubular in shape and is connected at its first end to a handle section 300 and has an opening 110 at its second end opposite the handle section 300; and a retaining element 200, which is movable at least translationally in the longitudinal direction of the sheath section 100 and has a retaining section 210 at its end facing the opening 110 of the sheath section 100, which is configured to engage with the stent; wherein the retaining section 210 is designed such that, after the retaining section 210 is pushed out of the sheath section 100, the retaining section 210 can be folded down relative to the rest of the retaining element 200.

An anti-reflux ureteral stent is provided. In cross section, the flap-like structure and a tube wall of the stent jointly enclose a lumen of the stent. The flap-like structure has an outer surface greater than an inner surface. When an external pressure of the flap-like structure is higher than an internal pressure of the flap-like structure, the flap-like structure closely fits the tube wall, and the tube wall supports the flap-like structure to realize closure of the lumen.

Implantable medical devices have zones of high in vivo stability that are adjacent to zones of relatively low in vivo stability, so that when these medical devices are implanted into a host, the zones of low in vivo stability degrade first and allow the formation of independent segments of relatively intact high in vivo stability bands that are sufficiently small that they may pass from the host in a non-harmful manner.

An apparatus including a first layer, where the first layer includes a scaffold structure forming an inner lumen along a length of the scaffold structure, and where the first layer includes a bioresorbable material; and a second layer on the first layer, where the second layer includes a bioresorbable material, where the second layer surrounds a majority of the first layer, and where the second layer is configured to hydroscopicly swell.

The present invention generally relates to an apparatus for placing a stent at a desired location in the human body. In particular, but not exclusively, the apparatus is configured to place a stent in the ureter or other passageway or space in the human body. The present invention may be embodied as an apparatus for inserting a stent into a body structure of a target, the apparatus comprising a stent guidewire, a first moving means configured to move the stent guidewire towards the body structure of the target, a stent pusher disposed around the stent guidewire, and a second moving means configured to move the stent pusher relative to the stent guidewire independently of the stent guidewire.

The present invention relates generally to an apparatus for placing a stent at a desired location within the human body. In particular, but not exclusively, the apparatus is configured to place a stent within the ureter or other passage or space within the human body. The invention may be embodied as an apparatus for inserting a stent into a bodily structure of a subject, the apparatus comprising: a stent guide wire, a first moving means configured to move the stent guide wire toward a bodily structure of a subject, a stent pusher disposed about the stent guide wire, and a second moving means configured to move the stent pusher independently of and relative to the stent guide wire.

Provided are a stent and an inserting apparatus thereof. The stent comprises a stent body (1). The stent body (1) includes: a first stent part (2) having at least one lumen (4) for drainage and guidewire passage; and a second stent part (3) having a second cross-section different from a first cross-section of the first stent part (2). The first cross-section of the first stent part (2) transitions to the second cross-section of the second stent part (3) to form the stent body (1), such that the stent body (1) performs drainage or infusion of fluids through the lumen (4). The structure of the stent utilizes a crescent-shape cross-section for the second stent segment (3), employing the siphon principle for drainage. When manufactured from the same material, the crescent-shape or planar second stent segment (3) is thinner, more flexible, and lighter than conventional stents. Additional advantages of the crescent-shape or planar structure include reduced irritation to patient organs and preserved functionality of sphincters.

The application discloses a ureteral stent, and aims to solve the problems in the prior art, and provides a ureteral stent which can detect whether the ureteral stent reaches a renal pelvis and can reduce stimulation to a urinary bladder. The ureteral stent comprises a stent body which can be inserted into a ureter, a J-shaped curled end of the stent body which is inserted into the renal pelvis is provided with a channel for urine inflow, a measuring wire is arranged at a head end of the J-shaped curled end, the measuring wire is arranged close to an outer side wall of a bent section of the J-shaped curled end, a first end of the measuring wire is arranged at the head end of the J-shaped curled end, and a tail end of the measuring wire is arranged beyond a tail end of the stent body. In the curling process of the J-shaped curled end, the tail end of the measuring wire can move relative to the tail end of the stent body under the deformation effect of the outer side of the J-shaped curled end.

The present disclosure relates to a stent (100), in particular a ureteral stent (100), for placement in a hollow vessel or hollow organ of the human or animal body, comprising: an elongate main element (10) which is tubular, and at least two retrieval thread sections (20, 30) which are provided at one end of the elongate main element (10) and are configured for engagement with a device for extracting the stent (100), wherein a first of the at least two retrieval thread sections (20, 30) is shorter than a second of the at least two retrieval thread sections (20, 30).