Abstract: A method for providing autoregulation function information is provided. The method includes: a) continuously sensing a tissue region with a tissue oximeter during a period of time, the sensing producing first signals representative of at least one tissue oxygenation parameter; b) continuously measuring a blood pressure level during the period of time using a blood pressure sensing device, the measuring producing second signals representative of the blood pressure level of the subject; c) evaluating the at least one tissue oxygenation parameter using the first signals and the blood pressure level using the second signals, relative to one another; d) producing a recent profile of autoregulation data using the first and second signals from a recent portion of the period of time; e) producing a historical profile of autoregulation data using the first and second signals from a historical portion of the period of time.

Abstract: A method of and system for non-invasively measuring tissue hemoglobin of a subject is provided. The method includes: a) non-invasively sensing tissue of a subject using a near infrared spectrophotometric (NIRS) sensing device, and determining at least one NIRS tissue THb value based on the non-invasive sensing; b) determining whether at least one Hb confounding factor is present during the non-invasive tissue sensing with the NIRS sensing device; and c) determining a NIRS circulatory THb portion of the NIRS tissue THb value based on the presence of the at least one Hb confounding factor during the non-invasive tissue sensing with the NIRS sensing device.

Abstract: A method and apparatus for determining a subject's autoregulation function state is provided. The method includes: continuously sensing a tissue region of a subject with a tissue oximeter to produce first signals representative of at least one tissue oxygenation parameter during a period of time; continuously measuring a blood pressure level of the subject during the period of time to produce second signals representative of the subject's blood pressure during the period of time; determining a presence of a confounding factor that affects the sensed tissue oxygenation parameter in a manner independent of an autoregulation function of the subject, the determination using the first signals; using the first and second signals to determine an autoregulation function state of the subject when the absence of the confounding factor is determined. The method may include determining an at least one of an LLA or a ULA of a subject's autoregulation function state.