Patent ID: 8573207

Claim:
A method of detecting patient-ventilator asynchrony comprising: obtaining, by at least one processor, a flow or pressure signal representative of respiratory movement of a patient on ventilatory support of a mechanical ventilator, captured by at least one respiratory sensor; modifying, by the at least one processor, the flow or pressure signal comprising: taking at least a portion of the flow or pressure signal; and transforming said at least said portion of the flow or pressure signal in accordance with a Fourier transform to obtain a frequency spectrum of said at least said portion of the flow or pressure signal; obtaining, by the at least one processor, a measure of spectral organization wherein said spectral organization comprises a spectral pattern of recurrent peaks of the obtained frequency spectrum; wherein said obtaining the measure of spectral organization comprises: obtaining, by the at least one processor, a ratio of a harmonic peak amplitude to an amplitude of a direct current (DC) component of said at least said portion of the flow or pressure signal, said obtaining said ratio comprising: dividing, by the at least one processor, the harmonic peak amplitude, by the amplitude of the DC component of said at least said portion of the flow or pressure signal; and providing, by the at least one processor, at least one of an output, or an output signal representative of the measure.