Patent ID: 11931578
Assignee: THE ALFRED E. MANN FOUNDATION FOR SCIENTIFIC RESEARCH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A method of treating obstructive sleep apnea in a subject comprising:
acquiring inertial data from an inertial sensor implanted in the subject, wherein the inertial data comprises one or more signals corresponding to a movement or an orientation of the subject;
acquiring sensory data from an acoustic sensor implanted in the subject, wherein the sensory data comprises acoustic signals generated by a heart and/or lungs of the subject;
generating a filtered signal by filtering the sensory data using at least one low pass filter and at least one high pass filter, or at least one bandpass filter;
extracting a signal envelope from the filtered signal;
extracting a respiratory waveform corresponding to a respiratory cycle of the subject, by applying a second low pass filter to the extracted signal envelope, wherein the second low pass filter comprises a filter that introduces a linear phase delay of between 400 to 600 ms;
determining whether the subject is asleep based on the inertial data and the extracted respiratory waveform; and
stimulating a nerve innervating an upper airway muscle of the subject, wherein stimulation is applied while the subject is asleep and after detecting at least one stable respiratory cycle following an apneic event, wherein apneic events are determined based on the extracted respiratory waveform.