Acoustic physiological monitoring device and large noise handling method for use thereon
First Claim
1. A physiological monitoring device, comprising:
- an acoustic transducer;
a processor communicatively coupled with the acoustic transducer; and
an output interface communicatively coupled with the processor, wherein a physiological signal detected by the acoustic transducer is transmitted to the processor, and wherein under control of the processor the device segments the physiological signal, in an estimation period for a physiological parameter, into initial time windows, identifies one or more noisy time windows among the initial time windows, replaces the noisy time windows with replacement time windows having a baseline amplitude, calculates an estimate of the physiological parameter using amplitudes of the physiological signal in non-replaced initial time windows and the replacement time windows, and transmits the estimate to the output interface whereon the estimate is outputted.
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Abstract
A physiological monitoring device and large noise handling method for use on such a device in which a reliable estimate of a physiological parameter is ensured by identifying and replacing large noise components of a physiological signal prior to estimation. An estimation period for a physiological parameter is segmented into time windows. Noisy time windows within the estimation period are identified. The noisy time windows are replaced with replacement time windows having a baseline amplitude. An estimate of the physiological parameter for the estimation period is calculated using the replacement time windows in lieu of the noisy time windows, and is outputted. If the share of noisy time windows exceeds a predetermined limit share, calculating and/or outputting of an estimate may be precluded. The physiological parameter may be heart rate.
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Citations
18 Claims
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1. A physiological monitoring device, comprising:
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an acoustic transducer; a processor communicatively coupled with the acoustic transducer; and an output interface communicatively coupled with the processor, wherein a physiological signal detected by the acoustic transducer is transmitted to the processor, and wherein under control of the processor the device segments the physiological signal, in an estimation period for a physiological parameter, into initial time windows, identifies one or more noisy time windows among the initial time windows, replaces the noisy time windows with replacement time windows having a baseline amplitude, calculates an estimate of the physiological parameter using amplitudes of the physiological signal in non-replaced initial time windows and the replacement time windows, and transmits the estimate to the output interface whereon the estimate is outputted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A large noise handling method for a physiological monitoring device, comprising the steps of:
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detecting by the device a physiological signal; segmenting by the device the physiological signal, in an estimation period for a physiological parameter, into initial time windows; identifying by the device one or more noisy time windows among the initial time windows; replacing by the device the noisy time windows with replacement time windows having a baseline amplitude; calculating by the device an estimate of the physiological parameter using amplitudes of the physiological signal in non-replaced initial time windows and the replacement time windows; and outputting by the device the estimate. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification