US 10,376,177 B2
Low power apparatus and method to measure complex electrical admittance or impedance
Jonathan W. Valvano, Austin, TX (US); Marc D. Feldman, San Antonio, TX (US); John Porterfield, Austin, TX (US); John A. Pearce, Austin, TX (US); Erik Larson, Austin, TX (US); Lev Shuhatovich, Houston, TX (US); Kathryn Loeffler, Leander, TX (US); and Raffaele Cetrulo, Austin, TX (US)
Assigned to Admittance Technologies, Inc., San Antonio, TX (US); and Board of Regents, The University of Texas System, Austin, TX (US)
Filed by Jonathan W. Valvano, Austin, TX (US); Marc D. Feldman, San Antonio, TX (US); John Porterfield, Austin, TX (US); John A. Pearce, Austin, TX (US); Erik Larson, Austin, TX (US); Lev Shuhatovich, Houston, TX (US); Kathryn Loeffler, Leander, TX (US); and Raffaele Cetrulo, Austin, TX (US)
Filed on Feb. 16, 2016, as Appl. No. 15/44,842.
Application 15/044,842 is a continuation of application No. 13/425,119, filed on Mar. 20, 2012, granted, now 9,295,404.
Claims priority of provisional application 61/516,138, filed on Mar. 30, 2011.
Prior Publication US 2016/0262653 A1, Sep. 15, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. A61N 1/36 (2006.01); A61B 5/053 (2006.01); A61N 1/05 (2006.01); A61N 1/365 (2006.01); A61N 1/37 (2006.01); A61B 5/0215 (2006.01); A61B 5/029 (2006.01)
CPC A61B 5/0538 (2013.01) [A61B 5/029 (2013.01); A61B 5/0215 (2013.01); A61N 1/056 (2013.01); A61N 1/36125 (2013.01); A61N 1/36521 (2013.01); A61N 1/3706 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus for measuring complex electrical admittance and/or complex electrical impedance in animal or human patients comprising:
two or more electrodes that are adapted to be disposed in the patient; and
a housing adapted to be disposed in the patient, the housing having disposed in it a stimulator in electrical communication with two or more electrodes to stimulate with either current or voltage an organ of the patient, the electrodes are placed in or on the organ, a sensor in electrical communication with the stimulating electrodes or with additional electrodes to sense a response based on the stimulation of the stimulating electrodes, and a signal processor in electrical communication with both the stimulator and the sensor to determine the complex electrical admittance of the patient with sinusoidal signals, the stimulator and the sensor and the signal processor together using an average current of less than 23 mA in operation over time, wherein a real part, and an imaginary part of admittance is measured to remove a muscle component of the patient from the complex admittance of the patient while removing a necessity to perform trigonometric calculations.