Ambulatory monitor ECG pulse calibration method
First Claim
1. A method of calibrating an ECG ambulatory monitor from calibration pulses recorded on a plurality of tape channels having ECG waveform data, the method comprising:
- loading the channel calibration pulses;
combining the channel calibration pulses to form a series of combined calibration pulses;
selecting combined calibration pulses having certain predetermined characteristics;
correlating the selected combined pulses to the corresponding channel calibration pulses;
selecting channel calibration pulses having at least a predetermined correlation to the corresponding selected combined pulses;
generating a calibration scale factor for each channel based on the selected channel calibration pulses for the corresponding channel; and
calibrating each channel of the ECG monitor using the calibration scale factor.
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Abstract
An ECG waveform calibration method combines ECG channel calibration pulses to form combined calibration pulses. The combined channel pulses are filtered to select valid combined pulses. The selected combined pulses are correlated to the corresponding channel calibration pulses to determine valid channel calibration pulses from which a correction scale factor is derived. A valid calibration pulse is determined where a correlation between a combined calibration pulse and a corresponding channel calibration pulse is greater than a predetermined correlation value. The valid channel calibration pulses are then characterized. A set of valid channel calibration pulses is selected for each channel based on the characterization to form an average calibration pulse. The average calibration pulse is used to determine a correction scale factor for each channel which is used to scale the actual channel ECG waveform data. The method also includes a step for adjusting the intra-channel skew.
18 Citations
16 Claims
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1. A method of calibrating an ECG ambulatory monitor from calibration pulses recorded on a plurality of tape channels having ECG waveform data, the method comprising:
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loading the channel calibration pulses; combining the channel calibration pulses to form a series of combined calibration pulses; selecting combined calibration pulses having certain predetermined characteristics; correlating the selected combined pulses to the corresponding channel calibration pulses; selecting channel calibration pulses having at least a predetermined correlation to the corresponding selected combined pulses; generating a calibration scale factor for each channel based on the selected channel calibration pulses for the corresponding channel; and calibrating each channel of the ECG monitor using the calibration scale factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification