Abstract: Methods and apparatus for noninvasive measurement of vital signs is provided. The apparatus comprises at least one sensor configured to sense biological signals including a photoplethysmogram (PPG), and at least one computer processor programmed to determine a plurality of vital signs based, at least in part, on the sensed biological signals, wherein the plurality of vital signs include at least two of heart rate, blood oxygenation, heart rate variability, blood pressure, blood sugar, cholesterol, pulse rate, pulse pressure, temperature, and respiration rate.

Abstract: Methods and apparatus for acquiring a noninvasive multi-dimensional photoplethysmogram (PPG) are provided. The apparatus comprises a plurality of light emitting diodes (LEDs), wherein a first LED of the plurality of LEDs is a first member of the group consisting of a green LED, a red LED, and an infrared LED and a second LED of the plurality of LEDs is a second member of a group consisting of a green LED, a red LED, and an infrared LED, wherein the plurality of LEDs are configured to illuminate a tissue, at least one sensor configured to sense light reflected from the tissue in response to illumination of the tissue by the plurality of LEDs, and at least one processor programmed to determine a multi-dimensional photoplethysmogram based, at least in part, on the sensed reflected light.