Patent ID: 7785258

Claim:
An analyte detection system for measuring an analyte in a bodily fluid of a patient, said system comprising: a housing; a fluid handling system disposed within the housing, the fluid handling system comprising: at least one fluid source passageway within the housing that is configured to be placed into fluid communication with a fluid source; a patient connection passageway within the housing that is configured to be placed into fluid communication with a venous or arterial line; a selective junction between the fluid source passageway and the patient connection passageway and within the housing, the selective junction configured to selectively connect the patient connection passageway to an analyzer that is also within the housing; a valve in fluid communication with the selective junction to selectively allow fluid from the fluid source to pass into the patient connection passageway or to allow bodily fluid from the patient to pass into the analyzer; and a pump in fluid communication with the selective junction; a sensor operatively connected to the analyzer and configured to provide information relating to said analyte in a sample of said bodily fluid; a processor; and stored program instructions executable by said processor such that said analyte detection system: automatically initiates and conducts a measurement of said sample with said sensor; and determines a treatment dose for said patient based on said measurement; wherein the fluid handling system is adapted to use a single lumen for each of the following: to withdraw a sample of blood from the patient in a first mode of operation, to return some withdrawn blood to the patient in a second mode of operation, and to deliver the treatment dose to the patient in a third mode of operation.