Plethysmograph pulse recognition processor
First Claim
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1. A method for identifying pulses in a plethysmograph waveform comprising:
- acquiring plethysmograph waveform data comprised of data related to one or more signals received from a light-sensitive detector that detects light having a plurality of wavelengths transmitted through body tissue carrying pulsing blood;
removing at least some waveform features from the plethysmograph waveform data that do not correspond to an idealized waveform;
selecting data representing potential pulses from within the plethysmograph waveform data;
determining time domain features of the data representing potential pulses; and
utilizing said time domain features to identify which of the data representing potential pulses corresponds to data representing physiologically acceptable pulses.
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Abstract
A time domain rule-based processor provides recognition of individual pulses in a pulse oximeter-derived photo-plethysmograph waveform.
974 Citations
26 Claims
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1. A method for identifying pulses in a plethysmograph waveform comprising:
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acquiring plethysmograph waveform data comprised of data related to one or more signals received from a light-sensitive detector that detects light having a plurality of wavelengths transmitted through body tissue carrying pulsing blood; removing at least some waveform features from the plethysmograph waveform data that do not correspond to an idealized waveform; selecting data representing potential pulses from within the plethysmograph waveform data; determining time domain features of the data representing potential pulses; and utilizing said time domain features to identify which of the data representing potential pulses corresponds to data representing physiologically acceptable pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16)
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- 11. A device for monitoring physiological parameters of a patient, the device comprising a processor capable of identifying a plurality of potential pulses within a plethysmograph waveform comprised of one or more signals received from a light-sensitive detector that detects light having a plurality of wavelengths transmitted through body tissue carrying pulsing blood, wherein said processor is also capable of removing at least some waveform features do not correspond to an idealized waveform from the plethysmogaph waveform, and identifying a physiologically acceptable pulse from among said plurality of potential pulses by evaluating differences between a segment of said plethysmograph waveform corresponding to a given potential pulse and an approximation of said segment.
Specification