A system and method for selective paging provides a page to a paging transceiver but does not automatically provide an associated message. One or more radially extending blade are provided near the tissue-penetrating tip of the trocar body so that they automatically open as the trocar is advanced through tissue. A medication delivery controller accepts one or more parameters from the sensor package and uses these parameters to determine the effect of a medication on a patient and the concentration level of medication that will achieve a desired effect. Therefore, the dataport may be able, for example, to relieve the processors that it serves from this duty.