Patent ID: 8992432
Filing Date: 2015-03-31
Classification: A61B,A61N

Abstract:
1. A method comprising: transmitting light into a patient from a light source positioned external to the patient; receiving the transmitted light at a sensor positioned external to the patient; generating a light detection signal in response to the received light, the light detection signal having a first amplitude and a first shape at a first time; monitoring, over a period of monitored time, the light detection signal for changes in at least one of the first amplitude and the first shape; detecting, at a second time, at least one of a second amplitude and a second shape of the light detection signal; comparing the at least one of the second amplitude and the second shape with a corresponding at least one of the first amplitude and the first shape; analyzing, with a processor, the compared at least one of the second amplitude and the second shape to detect a trend that the patient's pulse is detected and is becoming weaker over the period of monitored time; determining that the patient's pulse is weakening over the period of monitored time based on the detected trend; and providing at least one of treatment and information concerning treatment based on the determined-weakening patient pulse.