Patent ID: 8888700

Claim:
A system for non-invasively measuring respiratory rate from a patient, comprising: an impedance pneumography sensor comprising: at least two electrodes configured to be positioned on the patients torso and to detect respiration-induced impedance changes indicative of respiration, and a sensor module configured to be worn on the patient's torso and operably connected to the at least two electrodes, the sensor module comprising a processing circuit configured to process signals from the at least two electrodes to measure an impedance pneumography signal from the patient and a motion sensor configured to measure at least one motion signal corresponding to motion of a portion of the patient's body to which it is attached; and a processing system configured to receive the impedance pneumography signal and process it to determine a frequency-domain impedance pneumography spectrum, and to receive the motion signal and process it to determine a frequency-domain motion spectrum, the processing system further configured to collectively process both the impedance pneumography spectrum and motion spectrum to remove motion components from the impedance pneumography spectrum and then determine respiratory rate.