Sine saturation transform
First Claim
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1. In a patient monitor configured to obtain signals responsive to physiological parameters of a monitored patient, a method for filtering one or more of said signals to improve a determination of a pulse rate of the monitored patient, the method comprising:
- receiving one or more signals indicative of light attenuated by body tissue of pulsing blood in said monitored patient, said one or more signals usable to determine physiological measurements and a pulse rate of said monitored patient;
electronically determining an initial frequency estimate of said pulse rate;
electronically combining at least one sinusoidal waveform responsive to said estimate of said pulse rate with said one or more of said signals to produce a predetermined signal response; and
electronically signal component processing the combined signal to determine an output measurement of said pulse rate.
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Abstract
A transform for determining a physiological measurement is disclosed. The transform determines a basis function index from a physiological signal obtained through a physiological sensor. A basis function waveform is generated based on basis function index. The basis function waveform is then used to determine an optimized basis function waveform. The optimized basis function waveform is used to calculate a physiological measurement.
836 Citations
20 Claims
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1. In a patient monitor configured to obtain signals responsive to physiological parameters of a monitored patient, a method for filtering one or more of said signals to improve a determination of a pulse rate of the monitored patient, the method comprising:
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receiving one or more signals indicative of light attenuated by body tissue of pulsing blood in said monitored patient, said one or more signals usable to determine physiological measurements and a pulse rate of said monitored patient; electronically determining an initial frequency estimate of said pulse rate; electronically combining at least one sinusoidal waveform responsive to said estimate of said pulse rate with said one or more of said signals to produce a predetermined signal response; and electronically signal component processing the combined signal to determine an output measurement of said pulse rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A patient monitor that obtains signals responsive to physiological parameters of a monitored patient and filters one or more of said signals to improve a determination of a pulse rate of the monitored patient, the monitor comprising:
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an input that receives (i) one or more signals indicative of light attenuated by body tissue of pulsing blood in said monitored patient, said one or more signals usable to determine physiological measurements and a pulse rate of said monitored patient, and (ii) an initial frequency estimate of said pulse rate; and a frequency calculator that combines at least one sinusoidal waveform responsive to said estimate of said pulse rate with said signals to produce a predetermined signal response, and signal component processes the combined signal to determine an output measurement of said pulse rate. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification