Sine saturation transform
First Claim
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1. A method of determining a physiological parameter of a monitored patient attached to a noninvasive optical sensor, 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 measurements for one or more physiological parameters of said monitored patient;
electronically determining at least one basis function index based on said one or more signals;
electronically generating at least one basis function waveform based on said at least one basis function index;
electronically combining said at least one basis function waveform and said one or more signals to derive frequency components of said one or more signals; and
electronically processing said frequency components of said one or more signals to determine an output measurement of one or more of said one or more physiological parameters.
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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.
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15 Claims
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1. A method of determining a physiological parameter of a monitored patient attached to a noninvasive optical sensor, 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 measurements for one or more physiological parameters of said monitored patient; electronically determining at least one basis function index based on said one or more signals; electronically generating at least one basis function waveform based on said at least one basis function index; electronically combining said at least one basis function waveform and said one or more signals to derive frequency components of said one or more signals; and electronically processing said frequency components of said one or more signals to determine an output measurement of one or more of said one or more physiological parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A noninvasive optical sensor system comprising:
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an input capable of accepting one or more signals indicative of light attenuated by body tissue of a monitored patient; and a processor configured to communicate with said input and comprising; a first calculator configured to; determine a basis function index from said one or more signals; determine a basis function frequency based on said basis function index; and a second calculator configured to; generate at least one basis function waveform according to said index at said frequency; derive frequency components from said one or more signals and said at least one basis function waveform; and generate a physiological measurement responsive to said frequency components. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification