Patent ID: 11890079
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 14:
15. An apparatus for noninvasively detecting blood volume changes in a mammalian subject, the apparatus comprising:
an electronic display;
a number of noninvasive sensors configured to communicate with said electronic display and the subject to obtain baseline physiologic value measurements and real time physiologic value measurements from the subject; and
at least one integrated circuit, operably connected with the noninvasive sensors and configured to:
compute, using an algorithm, a real time blood volume index based upon difference values calculated between the baseline physiologic value measurements and corresponding real time physiologic value measurements, wherein the baseline physiologic value measurements and the real time physiologic value measurements are derived from at least three physiological parameters selected from the group including heart rate, electrical body impedance, skin temperature, perfusion index, peripheral blood flow, and skin humidity, and wherein the algorithm includes coefficients for weighting each difference value used to compute the real time blood volume index; and
display the real time blood volume index on said electronic display, wherein the electronic display is initially set to display a starting value blood volume index which indicates 100% of the subject's normal total blood volume, and wherein the displayed real time blood volume index is capable of indicating a blood volume change in the subject as low as 10% of the subject's starting value blood volume index.