Patent ID: 6714804
Filing Date: 2004-03-30
Classification: A61B,A61M

Abstract:
A physiological monitor comprising:a sensor interface in communication with at least one sensor adapted to be positioned at at least one peripheral tissue site and having an interface output responsive to light attenuated by said at least one site; and a signal processor in communication with said sensor interface output that provides a plurality of parameters corresponding to oxygen status or plethysmograph features of said at least one site, wherein said parameters comprise a first value and a second value related to said at least one site, wherein said first value is an arterial oxygen saturation and said second value is a venous oxygen saturation, wherein said second value is derived from an active pulse generated at said at least one site, wherein said signal processor output further comprises a scattering indicator corresponding to said at least one site, and said sensor interface further comprises a pulse drive controlling the amplitude of said active pulse, said drive responsive to said indicator.