Variable indication estimator
First Claim
1. An apparatus for selecting output physiological parameter values based on signal confidence, the apparatus comprising:
- one or more processors configured to;
receive an input physiological signal;
receive values of a physiological parameter derived from the input physiological signal, andselect output physiological parameter values by at least adjusting between smoothing the physiological parameter values and tracking the physiological parameter values;
wherein said adjusting is performed based at least in part on a characteristic of the input physiological signal.
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Abstract
A variable indication estimator which determines an output value representative of a set of input data. For example, the estimator can reduce input data to estimates of a desired signal, select a time, and determine an output value from the estimates and the time. In one embodiment, the time is selected using one or more adjustable signal confidence parameters determine where along the estimates the output value will be computed. By varying the parameters, the characteristics of the output value are variable. For example, when input signal confidence is low, the parameters are adjusted so that the output value is a smoothed representation of the input signal. When input signal confidence is high, the parameters are adjusted so that the output value has a faster and more accurate response to the input signal.
803 Citations
18 Claims
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1. An apparatus for selecting output physiological parameter values based on signal confidence, the apparatus comprising:
one or more processors configured to; receive an input physiological signal; receive values of a physiological parameter derived from the input physiological signal, and select output physiological parameter values by at least adjusting between smoothing the physiological parameter values and tracking the physiological parameter values; wherein said adjusting is performed based at least in part on a characteristic of the input physiological signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of selecting output physiological parameter values based on signal confidence, the method comprising:
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receiving an input physiological signal; receiving values of a physiological parameter derived from the input physiological signal; and adjusting between at least smoothing the physiological parameter values and tracking the physiological parameter values to produce output physiological parameter values, said adjusting being performed based at least in part on a characteristic of the input physiological signal; wherein at least said adjusting is performed by one or more processors. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification