Connecting SpO2 to Arduino

Has anyone ever achieved connecting an oximeter sensor to arduino?. I found a site where there's a Nellcor SpO2 sensor connected to a Propeller board and a code in spin language is included, but the connection diagram is not clear to me and they don't mention what is the input voltage for powering the red and IR leds, any clue will be of great help; This is the link: microMedic Demos | LEARN.PARALLAX.COM


I know it been long, did you solve this problem of connecting oximeter sernsor to arduino?