A suction device includes a membrane-covered walled enclosure from which pressure can be reduced therein, including through desired fluid removal from the enclosure, below ambient external air pressure to apply suction therapy to treat medical conditions, including sleep breathing disorders. A processor that supports a single load data to a register file operation can be doubled in load capability through the use of an extra path storage, an additional independently addressable data memory path, and instruction decode information that specifies two independently load data operations. This arrangement eases removal and reinstallation of the caliper. The keys for the secure group communication session are supplied, along with security policies, in response to a request containing the unique group ID identifying the dynamic group. A controller is programmed to detect when an electric jack motor has driven a jack to a jack stroke limit by monitoring one or more jack motor power draw characteristics and comparing those values to known values associated with the driving of a jack at or near the end of a jack stroke. The barrier metal layer is provided between the second electrode and the insulating film and between the second electrode and the second interconnection to cover the second electrode.