Patent ID: 8996088
Filing Date: 2015-03-31
Classification: A61B

Abstract:
1. A method comprising: emitting, at predetermined times, a radiation into a tissue of a subject; detecting, at corresponding predetermined times, a radiation emitted from the tissue of the subject; calculating, based on the detected radiation, an oxygenation parameter, at each of the corresponding times, of the tissue of the subject; processing, by one or more processors, the oxygenation parameter to generate one of a substantially real-time lactate curve or ventilatory curve, which is based on one or more signal features of the oxygenation parameter, wherein the oxygenation parameter comprises at least one of concentration of oxygenated hemoglobin, and concentration of deoxygenated hemoglobin, total concentration of hemoglobin, and Tissue Oxygenation Index; determining whether the lactate curve substantially contains a lactate threshold of the subject or the ventilatory curve substantially contains a ventilatory threshold of the subject; and providing an alert based on the determination that lactate curve substantially contains a lactate threshold or the ventilatory curve substantially contains a ventilatory threshold of the subject; wherein the one or more signal features comprises: a first signal feature comprising a oxygenation parameter value during an exercise stage; a second signal feature comprising a change in the oxygenation parameter value; a third signal feature comprising a rate of change in the oxygenation parameter value; a fourth signal feature comprising a scale of change in the oxygenation parameter value.