Apparatus for determining the conductivity of blood
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United States of America Patent
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Dec 1, 1998
Issued Date -
N/A
app pub date -
Apr 16, 1997
filing date -
Aug 21, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An in vivo apparatus for determining the absolute conductivity of a liquid such as human blood, including the steps of determining a location in a ventricle of a patient's heart at which blood conductivity may be measured effectively, positioning a catheter having a plurality of spaced electrodes in the ventricle such that at least a pair of adjacent electrodes are positioned at the location, applying a current of known magnitude to the adjacent electrodes, measuring the voltage between the adjacent electrodes, and determining the conductivity of the patient's blood from the known current and measured voltage.
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