Fetal data processing system and method employing a time-frequency representation of fetal heart rate
First Claim
1. A fetal data processing method comprising:
- receiving a signal indicative of fetal heart rate time data for the fetus;
generating a time-frequency representation based on the fetal heart rate time data; and
analysing the time-frequency representation using the fetal heart rate time data to indicate a condition of the fetus.
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Abstract
A fetal data processing system and method, and a fetal monitor and method for monitoring the condition of a fetus are disclosed. A fetal heart rate time series is received and sampled. A non-linear time-frequency transformation is performed to generate a time-frequency representation of the fetal heart rate time series for heart rate time series data spanning a time period which is preferably less than ten seconds. Analysis of fetal heart rate and fetal heart rate variability and other available data is performed to evaluate fetal well-being. Because of the high time resolution of the transformation, short-term transient variations in the heart rate and heart rate variability are considered in the analysis.
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Citations
36 Claims
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1. A fetal data processing method comprising:
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receiving a signal indicative of fetal heart rate time data for the fetus; generating a time-frequency representation based on the fetal heart rate time data; and analysing the time-frequency representation using the fetal heart rate time data to indicate a condition of the fetus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A fetal data processing system comprising:
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an input that receives fetal heart rate time data for a fetus; and a processing system comprising; a transformation subsystem that receives the fetal heart rate time data and generates a time-frequency representation for the fetal heart rate time data, and a variable analysis subsystem that receives the time-frequency representation and fetal condition data and generates a variable representation of fetal condition. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A fetal data processing system comprising:
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an input that receives fetal heart rate time data for a fetus; and a processing system comprising; a transformation subsystem that receives the fetal heart rate time data and generates a time-frequency representation for the fetal heart rate time data; and a variable analysis subsystem that receives the time-frequency representation and fetal condition data and generates a variable representation of fetal condition; and a display that displays a three-dimensional plot of the time-frequency representation.
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Specification