Fetal data processing system and method employing a time-frequency representation of fetal heart rate
AssigneeBeth Israel Deaconess Medical Center, Inc.
InventorsNancy E. Oriol, Frederick M. Bennett
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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.
Claims36
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.
A fetal data processing system comprising:
- 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.
A fetal data processing system comprising:
- 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.
Dependencies are inferred from the claim text.