The invention comprises a method for introduction of materials into a patient’s body. In one embodiment the block and tackle window balance includes a roller secured within a bottom guide to increase range of travel of a window sash. A request message is received from the encryptor. These components could be manufactured from various medical grade materials. The invention also provides methods of identifying one or more peptides andor proteins in one or more samples. The allowable signal swing at the terminal pad is increased to greater than supply voltage plus 1.