Patent ID: 7297113

Claim:
A microsensor system, comprising: a control module; and at least one microprobe communicatively coupled to the control module, wherein each microprobe comprises: a housing having an aperture; an ISFET attached to the housing, wherein the ISFET has a gate located proximate the aperture; reference electrode attached to the housing proximate the aperture; and a signal bearing medium communicatively coupled to the control module, tangibly embodying a program of machine-readable instructions executable by a digital processing apparatus to perform a method for monitoring a characteristic tissue, comprising: means for receiving medical intervention information; means for receiving patient reference values; means for receiving a tissue data point; means for checking validity of said tissue data point; means for determining a baseline mean and a baseline standard deviation for said tissue data if the baseline mean and the baseline standard deviation have not been determined for said tissue data; means for calculating test statistics; means for determining if a condition of said tissue data point is non-conforming; means for flagging the condition of said tissue data point if the condition of said tissue data point is non-conforming; means for determining if a statistically significant positive or negative trend is occurring; and means for generating a data output signal that represents a change in patient status.