Patent ID: 6330468
Filing Date: 2001-12-11
Classification: A61B

Abstract:
A system for determining a respiration rate of a cardiovascular system, comprising:(a) an emitter of green light for selectively illuminating a skin surface and a volume of intravascular blood therebeneath;the green light from said emitter of green light having a peak wavelength and a first wavelength band associated therewith;said peak wavelength being within a range of about 500-600 nm;the green light from said first emitter of green light interacting with the volume of intravascular blood, thereby generating an optical signal, the optical signal having an intensity;(b) an electromagnetic radiation sensor electrically connected to an electronic signal generator;said electromagnetic radiation sensor being optically coupled to the skin surface for reception of the optical signal;said electronic signal generator generating an electrical signal responsive to said electromagnetic radiation sensor, the electrical signal corresponding to the intensity of the optical signal being received by said electromagnetic sensor; and(c) a signal analyzer connected to said electronic signal generator for determining from the electrical signal the respiration rate of the cardiovascular system.