Regional ventilation and perfusion assessed by electrical impedance imaging

J.C. Newell, D. Isaacson, R.S. Blue
Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society  
Electrical impedance images of the chest of a dog were made while ventilating the lung unilaterally using a tracheal divider. Admittivity of the lungs decreased with inspiration only on the ventilated side, to an extent proportional to tidal volume. During breatholding, a Swan-Ganz catheter balloon was inflated in a major branch of the pulmonary artery, diverting flow from a substantial pulmonary segment. The phasic admittivity signal in one region of interest in the chest image increased
more » ... age increased abruptly when the occlusion was released. In a second region in the same images, a simultaneous decrease in admittivity was seen. We conclude that regional ventilation and perfusion can be assessed in impedance images.
doi:10.1109/iembs.1996.651973 fatcat:nznlh4uqbjaazbsi6a3eqqa6uy