Apparatus for determining the conductivity of blood

Details Apparatus for determining the conductivity of blood Apparatus for determining the conductivity of blood

1997-04-16

1998-12-01

Jastrzab, Jeffrey R.

Surgery

Diagnostic testing

Measuring electrical impedance or conductance of body portion

A61B 502

Patent

active

058429980

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.

REFERENCES:
patent: 4380237 (1983-04-01), Newbower
patent: 4785823 (1988-11-01), Eggers
patent: 5453576 (1995-09-01), Krivitski
patent: 5595183 (1997-01-01), Swanson et al.

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