Patent ID: 9179849
Filing Date: 2015-11-10
Classification: A61B

Abstract:
1. A system for determining a premature ventricular contraction event for a patient, the system comprising: a mobile plethysmographic device adapted to be worn on a patient, the mobile plethysmographic device comprising a processor, a memory, an optical sensor and an accelerometer, wherein the optical sensor comprises a plurality of green LEDs and a photodetector; and a display; wherein the optical sensor is configured to generate an optical signal for the patient through reflection of an applied light from the plurality of green LEDs of the optical sensor and the intensity of the reflected light is received by the photodetector; wherein the processor is configured to generate a plethysmographic signal for the patient from the optical signal, the plethysmographic signal comprising a plurality of pulse waves; wherein the processor is configured to identify a maximum peak value for each pulse wave of the plurality of pulse waves of the plethysmographic signal to generate a plurality of maximum values of the plethysmographic signal; wherein the processor is configured to calculate a plurality of time intervals between adjacent maximum values of the plethysmographic signal; wherein the processor is configured to establish a threshold minimum time interval and a threshold maximum time interval for the plurality of time intervals; and wherein the processor is configured to determine a premature ventricular contraction event for the patient based on an identification of a time interval that is above the threshold maximum time interval.