An eye-implantable device including an electrowetting lens is provided that can be operated to control an overall optical power of an eye in which the device is implanted. A lens chamber of the electrowetting lens contains first and second fluids that are immiscible with each other and that differ with respect to refractive index. By applying a voltage to electrodes of the lens, the optical power of the lens can be controlled by affecting the geometry of the interface between the fluids. One or both of the fluids can have a melting point slightly below body temperature. Freezing such an oil or other fluid of the lens can prevent fouling of internal surfaces of the lens due to folding or other manipulation of the lens during implantation. Once implanted, the fluids are melted by body heat such that the optical power of the lens may be controlled.

A vascular graft includes deformable sleeves that include an electrical component. The electrical component can be variable-resistance or piezoelectric, in embodiments, such that deformation of the sleeves due to pressure changes create or modify an electrical signal. A transponder can then transmit information relating to the pressure inside and outside of the vascular graft.

An array of hollow nanotubes is configured and dimensioned to allow impurities to transport through the hollow nanotubes from a first space containing an impurity-laden fluid to a second space where the impurities may be collected for removal, allowing fluids, such as blood, to be purified.

Apparatus and methods are described, including a stent configured to be placed in a lumen. The stent includes a generally cylindrical stent body comprising a plurality of struts, and a plurality of antenna posts protruding longitudinally from an end of the stent body. Each of the antenna posts includes a proximal and distal portions, each of which is configured to be generally straight in the absence of any force being applied to the antenna post, and a compliant junction disposed between the proximal and distal portions, the proximal and distal portions being configured to flex with respect to one another about the compliant junction. An antenna is disposed annularly on the distal portions of the antenna posts, such that the antenna posts separate the antenna from the end of the stent body. Other applications are also described.

Apparatus and methods are described, including a stent configured to be placed in a lumen. The stent includes a generally cylindrical stent body including a plurality of struts, at least one electrode post protruding from the stent body, and a plurality of antenna posts protruding longitudinally from an end of the stent body. The antenna posts are longitudinally separated from the electrode post. An antenna is disposed annularly on the antenna posts, such that the antenna posts separate the antenna from the end of the stent body, and at least one electrode is coupled to the stent by being placed on the electrode post. Additional embodiments are also described.

Stents formed from dissimilar materials configured to control tissue growth. A stent may be formed from a composite wire helically wound into a stent having a tubular configuration. The composite wire includes a first wire and a second wire coupled together, the first and second wires being formed from dissimilar metals such that a potential difference is formed when the dissimilar metals are exposed to bodily fluids. The potential difference is configured to inhibit cell proliferation and thereby control tissue growth around the stent after implantation. A stent may be formed from a hollow composite wire including an inner member that includes first and second longitudinal strips formed from dissimilar metals. A stent may be formed from a composite wire having a plurality of windows along a length of the composite wire. An insert formed from a dissimilar metal is disposed within each window of the plurality of windows.

Implantable devices disclosed herein may be configured to modulate the localized pH at an implantation site of the implantable device. By controlling, modulating, or otherwise adjusting the localized pH, various benefits can be achieved, such as controlling cell proliferation. The implantable device may include a body and one or more metallic features. Generally, the implantable device forms a galvanic cell such that a first metallic feature is configured to be preferentially oxidized to alter the localized pH environment in the vicinity of the implantable device.

A medical device configured to perform an endovascular therapy can include an elongate manipulation member and an intervention member. The elongate manipulation member can include a distal end portion. The intervention member can include a proximal end portion and a mesh. The proximal end portion can be coupled with the distal end portion of the elongate manipulation member. The mesh can have a plurality of cells in a tubular configuration and being compressible to a collapsed configuration for delivery to an endovascular treatment site through a catheter and being self-expandable from the collapsed configuration to an expanded configuration. The mesh can include an anodic metal and a cathodic metal. The anodic metal and the cathodic metal can each form a fraction of a total surface area of the mesh.

Medical device delivery assemblies are disclosed. The assembly may include a catheter-based delivery system. The assembly may include a pacing element to pace a patient's heart before, during, or after a procedure. The pacing element may be a detachable, implanting pacing element. The pacing element may be an implantable pacemaker and the implantable pacemaker may be disposed on a catheter-based delivery system. The assembly may include a prosthetic heart valve with one or more pacing elements on it. The pacing element may include a pacing strip or strips. These strips may be conductive or insulative. These strips may prevent, treat, or correct abnormal electrical communication in a heart.

A system comprising a biomimetic electrochemical eye (EC-EYE) and a computing device is provided. The EC-EYE comprises: an ionic liquid device; a nanowire (NW) device that comprises the plurality of NWs; and a connection device configured to provide a plurality of currents associated with the plurality of NWs to a computing device. The computing device comprises one or more processors and a display device. The one or more processors are configured to: receive the plurality of currents from the plurality of NWs via the connection device; determine a plurality of pixel characteristics associated with a plurality of pixels based on the plurality of currents from the plurality of NWs; generate an image comprising the plurality of pixels based on the plurality of pixel characteristics; and provide the image to a display device. The display device is configured to display the image.