Apparatus, Systems and Methods Analyzing Pressure and Volume Waveforms in the Vasculature
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Abstract
Apparatus, systems and methods are provided for analyzing relative compliance in the peripheral vasculature. Such apparatus, systems and methods generally involve generating a plethysmograph (PG) signal, generating one or more pressure waveforms and comparing the pressure waveform(s) relative to the PG signal to determine compliance indexes associated particular regions of the vasculature. A relative compliance ratio may also be determined by comparing arterial and venous relative compliance indexes. Apparatus, systems and methods are also provided for analyzing a PG waveform. Such apparatus, systems and methods generally involve generating a plethysmograph (PG) signal and comparing amplitude modulation of the PG signal relative to baseline modulation of the PG signal to estimate a relationship between left ventricular end diastolic pressure and stroke volume. The estimated relationship may account for a phase offset for the time between when changes in venous return affect left ventricular end diastolic pressure and stroke volume.
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79. A method for analyzing relative compliance in the peripheral vasculature, the method comprising:
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generating a plethysmograph (PG) signal; generating one or more pressure waveforms; comparing the one or more pressure waveforms relative to the PG signal to determine one or more relative compliance indexes, wherein each of the one or more relative compliance indexes is associated with a particular region of the vasculature. - View Dependent Claims (80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102)
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103. A system for analyzing relative compliance in the peripheral vasculature, the system comprising:
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means for generating a plethysmograph (PG) signal; means for generating one or more pressure waveforms; and means for comparing the one or more pressure waveform relative to the PG signal to determine one or more relative compliance indexes, wherein each of the one or more relative compliance indexes is associated with a particular region of the vasculature.
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Specification