A method and a system are provided for encoding and processing digital information. A coupling coefficient between a first inductance element and a second inductance element, an inductance of the first inductance element, and an inductance of the second inductance element are determined. The access device may be used to create a passageway to an anatomical structure, such as the patient’s bladder. In another embodiment, the transmitter selectively transmits security codes at a default frequency which is selected because of a recorded count of prior apparent successful transmission. The second intermetallic layer is located on the second metal thin film layer, and the first intermetallic layer is located on the second intermetallic layer. The solder portions of the terminals extend beyond the rear face of the insulation housing.