Methods of fabricating a polymeric implantable device, such as a stent, with improved fracture toughness through annealing a polymer construct below the glass transition temperature of the polymer of the construct prior to a deformation step are disclosed herein. In accordance with one aspect of the invention, enhanced functionality and diagnostic capability is provided by integrating the pump controller and the tank gauge by way of a control or integration unit. An electrical power source is also disposed in the body.