Method of measuring subthreshold defibrillation electrode...

Details Method of measuring subthreshold defibrillation electrode... Method of measuring subthreshold defibrillation electrode...

A - Human Necessities

61

N

326/1.6

A61N 1/39 (2006.01) A61N 1/08 (2006.01)

Patent

CA 2033299

-31- Abstract A method and apparatus for measuring sub- threshold 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 resis- tance may be utilized to adjust the energy level of a defibrillation shock used to treat a detected tachyar- rhythmia. In one embodiment the calculated resistance and a predetermined leading edge voltage are used to calculate and adjust the duration of the defibrilla- tion shock. In another embodiment the calculated electrode resistance and a predetermined shock dura- tion are used to adjust the leading edge voltage of the defibrillation shock.

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