NIBP trigger in response to detected heart rate variability
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United States of America Patent
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Apr 18, 2000
Grant Date -
N/A
app pub date -
Nov 10, 1997
filing date -
Nov 10, 1997
priority date (Note) -
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Abstract
An automated sphygmomanometer which triggers a blood pressure determination upon detection of a significant change in the patient's heart rate variability (HRV). The HRV can be measured directly from the NIBP signal or, when a multiparameter monitor is used, the HRV can be measured from the ECG signal or the NIBP signal. HRV is continuously monitored and the baseline HRV is correlated with baseline blood pressure values. Changes in HRV are displayed continuously on a display so that the clinician can determine whether to initiate an NIBP measurement or, on the other hand, the NIBP measurement can be triggered automatically in response to a change in HRV without any intervention by the clinician. Alternatively, the patient monitor can 'learn' the correlation between HRV and blood pressure changes and only alert the clinician when a significant change in HRV has taken place. The technique of the invention allows the clinician to monitor NIBP at less frequent intervals without the concern of missing physiologically significant changes in blood pressure and without the requirement of 'check inflates' in a guard mode.
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