A size-variable Implantable device having a body including at least one attaching portion configured for securing the device to a surgical site of a patient a size-controlling member configured for controlling at least one dimension of the device and an actuator arranged to actuate the size-controlling member. The device may include a mounting portion for mounting one or more expandable conduits. The at least one attaching portion may be made from a deformable, e.g. an expandable and/or contractible, material, which may allow expansion and/or contraction of the size-variable implantable device. The device may include one or more sensors for detecting, measuring, collecting, storing, and/or communicating data in the region of deployment of the device, which may cause the actuator to actuate the size-controlling device when one or more of the detected parameters reach a predetermined value.
