Implantable damping devices for treating dementia and associated systems and methods of use

A device for treating or lowering the effects of blood pressure waves, the device comprising:

• a structural member comprising a tubular mesh structure configured to expand from a low-profile state to a deployed state;
• and
• a tubular damping member having an outer sidewall, an inner sidewall defining a lumen extending through the damping member, a cavity between the outer and inner sidewalls, and a plurality of fluid particles contained within the cavity, the damping member positioned radially inwardly of the structural member and having a low-profile configuration and a deployed configuration, wherein the damping member includes a plurality of damping regions spaced apart along its longitudinal dimension and a plurality of channels, each of the channels extending between and fluidly coupling adjacent damping regions, and wherein, when the damping member is in a deployed, relaxed state, the inner sidewall at the damping regions projects laterally inwardly away from the channels and into the lumen,
• wherein the device is configured to be deployed within a blood vessel lumen such that an outer surface of the structural member is in apposition with an inner surface of the blood vessel wall and an outer surface of the inner sidewall of the damping member is in contact with blood flowing through the blood vessel lumen, and
• when the device is deployed within the blood vessel lumen, a pressure wave traveling through the blood vessel redistributes at least a portion of the fluid particles along the length of the damping member such that, as the pressure wave exerts a force at a location along one of the damping regions, the distance between the inner sidewall and the outer sidewall decreases at the location and increases at another location along the damping member away from the location.