The present technology relates to interatrial shunting systems and methods. In some embodiments, the present technology includes interatrial shunting systems that include a shunting element having a lumen extending therethrough that is configured to fluidly couple the left atrium and the right atrium when the shunting element is implanted in a patient. The system can also include an energy receiving component for receiving energy from an energy source positioned external to the body, an energy storage component for storing the received energy, and/or a flow control mechanism for adjusting a geometry of the lumen.

The present technology is directed to adjustable shunting systems having a shunting element, a shape memory actuator, and a lumen extending therethrough for transporting fluid. The shape memory actuator can have a plurality of struts proximate the shunting element and a plurality of projections extending from the plurality of struts. In operation, the shape memory actuator can be used to adjust a geometry of the lumen. In some embodiments, the system is configured such that (a) any strain in the shape memory actuator is concentrated in the struts, and/or (b) the struts experience greater resistive heating than the projections when an electrical current is applied to the actuator.

The present technology is generally directed to implantable medical devices and associated methods. For example, a system configured in accordance with embodiments of the present technology can include a body implantable into a patient and configured to undergo a shape change, the body having a conductive path with variable conductivity in portions thereof for selective and/ or preferential heating. The body can be coupled with an energy source that can delivery energy to the body and/or conductive path, to promote the shape change in the body.

The invention provides systems, devices, and methods for the delivery, deployment, and positioning of magnetic compression devices at a desired site so as to improve the accuracy of anastomoses creation between tissues, organs, or the like.

A shunt device is configured to be inserted into a puncture in a tissue wall that defines a horizontal reference plane. The shunt device includes a shunt body. The shunt body includes a central flow tube extending from a first axial end to a second axial end and defining a central axis therethrough that is angled from a reference axis extending perpendicular through the horizontal reference plane; a flow path extending through the central flow tube; and a plurality of arms extending outward from the central flow tube and configured to secure the shunt device to the tissue wall. The plurality of arms includes a first distal arm and a second distal arm attached to the first axial end of the central flow tube and a first proximal arm and a second proximal arm attached to the second axial end of the central flow tube.

Various systems, devices, and methods for endovascular implants and accurate placement thereof are disclosed. The implants include a proximal implant segment, a distal implant segment, connector struts connecting the proximal implant segment to the distal implant segment, and a side opening between the proximal implant segment and the distal implant segment. The implants can be used to create an arteriovenous fistula or connect one vessel of the body to another by placement of the proximal implant segment and the distal implant segment within the vessels to be connected. The implants can have an hourglass shape. The implants can include a continuous strut or ring at a distal edge of the proximal implant segment. Also disclosed are methods for accurate percutaneous placement of the implants disclosed, and a device for percutaneous delivery.

An apparatus includes a plurality of beads each defining a first opening and a second opening, a linking assembly, and a 3D printed magnetic element housed within a first bead of the plurality of beads. The linking assembly extends through the first opening and the second opening of each bead such that the beads and the linking assembly may be arranged in an annular arrangement to form a loop around an anatomical structure in a patient. The loop moves between a contracted configuration and an expanded configuration and is magnetically biased toward the contracted configuration. The 3D printed magnetic element is housed within a first bead of the plurality of beads. The 3D printed magnetic element include a composite of magnetic granules combined to generate a magnetic field. The magnetic field is generated by the 3D printed element and is configured to contribute toward the magnetic bias.

An apparatus includes a plurality of beads and a plurality of interconnection elements. Each bead includes a housing and a magnet. Each interconnection element includes a main body extending between a pair of ends, and a pair of heads each positioned at a respective end and received within a bead. The beads and interconnection elements are sized and configured to form a loop configured to transition between constricted and expanded configurations. The apparatus is configured such that, when the loop is in the expanded configuration, a first head of a first interconnection element is received within a first bead and is spaced apart from a first centerline of the first bead by a first distance, and a second head of a second interconnection element is received within a second bead and is spaced apart from a second centerline of the second bead by a second distance.

An apparatus includes a plurality of beads a linking assembly joining the beads together. The beads and the linking assembly are arranged in an annular arrangement and sized to form a loop around an anatomical structure in a patient. The loop may move between a contracted and expanded configuration. The loop is magnetically biased toward the contracted configuration by a magnetic bias of the beads. Each bead includes a housing having a first piece and a second piece that together define a magnetic chamber. A magnetic is within the magnetic chamber. A weld joins the first piece and the second piece while hermetically sealing the magnet chamber. The first piece of the housing includes a mounting feature integrated with a surface of the first piece. The mounting feature mates with a fixture to constrain the first piece of the housing as the weld is formed.

A circular stapling device is described that is particularly suited for creating stomas. The circular stapling device includes two tool assemblies. The first tool assembly is adapted to create a reinforced incision in tissue, e.g., the rectus sheath, through which a vessel portion, e.g., colon, small intestine, etc. can be pulled through during a surgical procedure. The second tool assembly is adapted to attach a stomal sleeve within the vessel portion such that the stomal sleeve extends from the stoma.