Methods and devices are provided for regulating a restriction system. In
one exemplary embodiment, a restriction system is provided having a
restriction device configured to receive fluid and to form a restriction
in a pathway corresponding to an amount of fluid contained therein, at
least one fluid reservoir, and a fluid logic system coupled between the
restriction device and the at least one fluid reservoir. The fluid logic
system is configured to regulate an amount of fluid in the restriction
device in response to a fluid pressure acting thereon.