Patent ID: 7841985
Filing Date: 2010-11-30
Classification: A61B

Abstract:
1. A method using a photoplethysmographic system, comprising: releasably interconnecting four terminals of a photoplethysmographic sensor to a photoplethysmographic monitor, wherein a first pair of said four terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals, wherein a second pair of said four terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals, wherein a third pair of said four terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across an identification element coupled between said third pair of terminals; and wherein said first, second, and third pairs of terminals each utilize a unique combination of said four terminals and wherein each said first, second, and third pairs of terminals share at least one terminal with another of said first, second, and third pairs of terminals; applying a first interrogation signal to a terminal shared by two of said pairs of terminals to obtain a first output signal across one of said two pairs of terminals; applying a second interrogation signal across the other of said two pairs of terminals to obtain a second output signal at said shared terminal; and utilizing at least one of said first and second output signals to identify said sensor.