Patent ID: 8343063
Filing Date: 2013-01-01
Classification: A61B

Abstract:
1. A vital sign measurement device comprising: a sensor fixation device adapted to be placed against an anatomical location of a subject, within which is an artery; an optical sensing system comprising an optical source device and an optical detector, both of which are held by the sensor fixation device and move with movement of the sensor fixation device, the optical source device configured to produce a speckle pattern output, the optical detector positioned to detect at least a portion of the speckle pattern output and generate therefrom a signal indicative of the detected portion of the speckle pattern output; a sensor pad held by the sensor fixation device on a cantilevered beam so that it is placed against the anatomical location when the sensor fixation device is placed against the anatomical location, wherein the sensor pad on the cantilevered beam is attached to or presses against at least one portion of the optical sensing system such that an arterial pulse results in the movement, bending, or compression of the at least one portion of the optical sensing system relative to other portions of the optical sensing system resulting in a change in an optical energy received within the detected portion of the speckle pattern output, wherein the optical detector comprises an optical energy receiving portion having a smaller surface area than the area of the speckle pattern output; and an output unit that generates a measure of the vital sign using the signal indicative of the optical signal received within the detected portion of the speckle pattern output.