Methods for measurement of arterial blood flow
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United States of America Patent
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Apr 25, 1995
Grant Date -
N/A
app pub date -
Mar 18, 1994
filing date -
Mar 18, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A sensor for measurement of one or more parameters of arterial blood flow, located on a transvenously inserted lead. The sensor may be inserted into a vein that is anatomically adjacent to the artery in which blood flow parameters are to be monitored, rather than into the artery itself. The sensor may take the form of a set of spaced electrodes for impedance plethysmography, a piezoelectric pulse sensor or a pulse Doppler sensor for detecting arterial blood flow. By measuring arterial blood flow from an adjacent vein, problems associated with insertion of the sensor into the arterial system may be avoided. The sensor may be used to control the characteristics of an implantable device, such as an implantable pacemaker/cardioverter/defibrillator, an implantable drug dispenser or a rate responsive pacemaker.
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