Wearable pulse oximetry device

摘要

A pulse oximetry device that is mounted on a wrist strap and fixates an area above a distal end of the ulna with a dome shaped structure. This area is used as measuring area. The measurement is carried out by a detector positioned above the fixated area, that detects light emitted by light sources having different wave lengths that are located at a periphery of the fixated area. Hence, the reflections are measured at neither a reflection mode nor a transmission mode, but are at an angle between 20° and 160° from the emitted light. This mode, termed trans-illumination, allows achieving an excellent signal to noise ratio that for the first time enables continuous and reliable measurement of oximetry data on the wrist.

主权项

1. A pulse oximetry device, the device comprising:
at least two light sources having different wavelengths; at least one detector responsive to said different wavelengths; and a structure adapted to fixate at a distal end of the ulna at a fixated area, wherein said at least two light sources having different wavelengths and said at least one detector are fixed within, or adjacent to, said structure such that when said structure fixates at said fixated area said at least two light sources and said at least one detector are positioned adjacent to the distal end of the ulna and said at least one detector is positioned to measure trans-illumination via the distal end of the ulna through said fixated area, wherein said trans-illumination originates from emitted light from said at least two light sources.