Patent ID: 8449470

Claim:
A cardiac output system for repetitive cardiac output measuring of a freely moving individual comprising: a) a dye calibration and delivery system (CDS) configured to be worn by the individual comprising: i. a calibration station configured to hold at least one calibration cartridge and to draw blood from the individual; and ii. a dye delivery station configured to hold at least one dye delivery cartridge and to administer a predetermined amount of dye to the individual's blood stream; b) a sensing device configured to be worn by the individual comprising: i. at least one illumination source configured to rest against the individual's skin and to excite the administered dye in the blood stream; and c) at least one photodetector configured to rest against the individual's skin and to detect fluorescence intensity reflected from or transmitted by the illuminated dye; and d) an external device configured to wirelessly communicate with at least the CDS and the sensing device, and to determine the cardiac output of the individual based on the detected fluorescence intensity and the information indicative of the concentration of the dye in the blood that was drawn from the individual.