Surgery – Truss – Pad
Patent
1984-04-13
1987-03-17
Howell, Kyle L.
Surgery
Truss
Pad
128693, A61B 505
Patent
active
046499326
ABSTRACT:
In deriving the impedance of a zone of a body errors arise when currents used stray from the zone due to movements of, and/or changes within the body. In the invention a current used for deriving impedance is passed through a zone under investigation using current electrodes outside the zone. A potential also required for deriving impedance is available at two potential sensing electrodes at ends of the zone. The current is confined to the zone by passing control currents just outside the zone between pairs of control current electrodes to set up virtual current barriers minimum along the boundaries of the zone. Pairs of potential sensing electrodes straddling the boundaries are used to adjust currents passed by the control current electrodes to establish the positions of the boundaries and to stabilize these positions when movement and/or internal functional change occurs.
REFERENCES:
patent: 3452743 (1969-07-01), Rieke
patent: 3957037 (1976-05-01), Fletcher et al.
patent: 4269195 (1981-05-01), Itoh
patent: 4275743 (1981-06-01), Hjort
patent: 4300574 (1981-11-01), Briggs
patent: 4458694 (1984-07-01), Sollish et al.
patent: 4486835 (1984-12-01), Bai et al.
patent: 4539640 (1985-09-01), Fry et al.
Henderson; "An Impedance Camera for Spatially Specific Measurements of the Thorax"; IEEE Trans. on Biomed. Engr., vol. BME-25, No. 3, 5-1978, pp. 250-254.
Paper from The Annals of the New York Academy of Sciences, vol. 170 (1970) pp. 532-549, Kenneth Lifshitz, M. D. Orangeburg, New York.
Electrical Impedance Imaging of the Thorax, Yongmin Kim et al, pp. 246-257, Mar. 18, 1983.
An Electrical Resistivity Method for Evaluating the In-Situ Porosity of Clean Marine Sands, pp. 91-114, Peter Douglas Jackson.
Focussed Electrical Resistivity Arrays: Some Theoretical and Practical Experiments, pp. 601-626, 1981; P. D. Jackson.
Howell Kyle L.
National Research Development Corp.
Sykes Angela D.
LandOfFree
Method and apparatus for deriving currents and potentials repres does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for deriving currents and potentials repres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for deriving currents and potentials repres will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1782053