Patent ID: 8556818

Claim:
Apparatus for determining at least one physiologic parameter of a patient, said apparatus comprising (a) at least one pressure sensor device adapted to provide readings of a blood pressure of said patient, and (b) storage means for storing said readings as at least one pressure curve over time, (c) fourier transformation means for subjecting said at least one pressure curve to a fourier transformation, and (d) an evaluator adapted to retrieve at least one power value selected from a group consisting of a cardiac power value representing cardiac power and a respiratory power value representing respiratory power from at least one fourier transform received from said fourier transformation means and to determine said physiologic parameter from said at least one power value, wherein said evaluator is adapted to extract at least one power-spectrum selected from the group consisting of a cardiac power-spectrum and a respiratory power-spectrum; from at least one fourier transform received from said fourier transform means to determine a width at a predetermined fraction of the maximum of a peak of said at least one power-spectrum and to use said width to separate harmonics.