Surgery – Truss – Pad
Patent
1990-12-14
1993-06-01
Howell, Kyle L.
Surgery
Truss
Pad
128734, A61N 139
Patent
active
052150810
ABSTRACT:
A method and apparatus for measuring subthreshold defibrillation electrode resistance are disclosed. A known subthreshold current pulse is sourced across the electrodes, the resulting voltage is measured and the electrode resistance is calculated from these values. The calculated electrode resistance may be utilized to adjust the energy level of a defibrillation shock used to treat a detected tachyarrhythmia. In one embodiment the calculated resistance and a predetermined leading edge voltage are used to calculate and adjust the duration of the defibrillation shock. In another embodiment the calculated electrode resistance and a predetermined shock duration are used to adjust the leading edge voltage of the defibrillation shock.
REFERENCES:
patent: 3713449 (1973-01-01), Mulier
patent: 4328808 (1982-05-01), Charbonnier et al.
patent: 4574810 (1986-03-01), Lerman
patent: 4596252 (1986-06-01), Nelson
patent: 4630615 (1986-12-01), Yomtov
patent: 4694830 (1987-09-01), Lekholm
patent: 4697591 (1987-10-01), Lekholm et al.
patent: 4721110 (1988-01-01), Lampadius
patent: 4771781 (1988-09-01), Lerman
patent: 4869252 (1989-09-01), Gilli
patent: 4870341 (1989-09-01), Pihl et al.
R. E. Kerber et al., "Automated Impedance-Based Adjustment for Defibrillation: Experimental Studies," Circulation, vol. 71, No. 1, pp. 136-140 (Jan. 1985).
J. H. Lawrence et al., "The Characterization of Human Transmyocardial Impedance During Implantation of the Automatic Internal Cardioverter Defibrillator," PACE, vol. 9, pp. 745-755 (Sep.-Oct. 1986).
W. A. Tacker, Jr. et al., "Electrical Defibrillation," appearing at p. 14 of W. A. Tacker, Jr. et al.'s book Electrical Defibrillation, published by the CRC Press, Inc. of Boca Raton, Fla. (1980).
L. A. Geddes et al., "The Prediction of the Impedance of the Thorax to Defibrillating Current," Medical Instrumentation, vol. 10, No. 3, pp. 159-162 (May-Jun. 1976).
G. V. Savino et al., "Transventricular Impedance During Fibrillation," IEEE Transactions on Biomedical Engineering, vol. BME-30, No. 6, pp. 364-367, (Jun. 1983).
R. E. Kerber et al., "Advance Prediction of Transthoracic Impedance in Human Defibrillation and Cardioversion: Importance of Impedance in Determining the Success of Low-Energy Shocks," Circulation, vol. 70, No. 2, pp. 303-308 (Aug. 1984).
Howell Kyle L.
Schaetzle Kennedy J.
Telectronics Pacing Systems Inc.
LandOfFree
Method and device for measuring subthreshold defibrillation elec 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 device for measuring subthreshold defibrillation elec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for measuring subthreshold defibrillation elec will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1807954