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US 5,397,336 AGranted
Defibrillator/cardioverter
AssigneeSiemens Aktiengesellschaft
InventorsJakub Hirschberg, Martin Obel
Life of this patent
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Abstract
In order to be able to set the distribution of current of the defibrillation current across the heart muscle, a defibrillator/cardioverter has n (n.gtoreq.3) electrodes connected to a pulse generator having n-1 outputs with a total of n output terminals to which the electrodes are connected. A measuring unit generates a measured signal dependent on the geometrical arrangement of the electrodes with reference to the heart. This measured signal is utilized for setting the pulse heights of the defibrillation pulses to be simultaneously generated at the outputs.
Claims6
A defibrillator/cardioverter comprising:
- a plurality of n electrodes, n being greater than or equal to three, adapted for arrangement relative to the heart of a patient with heart tissue between said electrodes for delivering electrical pulses having a pulse height to said heart;
- pulse generator means including means for establishing n-1 series-connected circuits having a total of n output terminals respectively connected to said n electrodes, for generating said electrical pulses simultaneously and respectively in said output circuits;
- means for measuring an electrical quantity which is dependent on said arrangement of said electrodes and said heart tissue between said electrodes, and for generating an electrical signal corresponding to the measured electrical quantity;
- and
- control means, supplied with said electrical signal from said means for measuring, for controlling said pulse generator means for individually setting the respective pulse heights of said electrical pulses in said output circuits of said pulse generator means dependent on said measured electrical quantity.
2 more elements
Dependencies are inferred from the claim text.