A method and system are described for controlling a policy-based network. The suction head comprises a planar flange portion and a tubular connector piece on a first face that communicates with an aperture extending to a second face. In other embodiments, a treatment method comprises applying a first neural stimulation therapy to the patient in a continuous or generally continuous manner during a first time interval, and applying a second neural stimulation therapy to the patient in a noncontinuous or interrupted manner following the first time interval.