Apparatus for destroying a selected part of biological tissue
AssigneeTekniska Rontgencentralen AB
InventorsBjorn Nordenstrom, Jerker Olsson
Life of this patent
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Abstract
An apparatus for destroying a neoplasm, such as a tumor, including electrodes (9,12) connected to a source (1) of direct voltage, of which electrodes one (9) is intended to be arranged in the neoplasm (16) and the other to be brought into electrically conductive contact with the body tissue (17) at a distance from said neoplasm. Measuring apparatus (7) is provided for measuring and indicating the current flowing between the electrodes and integrating apparatus (14) is provided for time integrating the measured current and indicating the electrical charge applied to said neoplasm and said body tissue.
Claims5
An apparatus for destroying a neoplasm such as a tumor in a biological body tissue, said apparatus including at least two electrodes, means to connect said electrodes to a source of direct current, one of said electrodes arranged to be inserted in said neoplasm and the other arranged to be placed in electrically conductive contact with said body tissue at a distance from the neoplasm, current measuring means located between said source of direct current and one of said electrodes, integrating circuit means connected to said current measuring means for time-integrating the current passing between the electrodes, and an indicator connected to the integrating circuit means for indicating the total ampereseconds applied to the neoplasm and body tissue during a treatment period.
The apparatus of claim 1 or claim 7 in which means are provided to interrupt the supply of direct current to the electrodes when the charge measured by the integrating circuit means reaches a selected value.
Dependencies are inferred from the claim text.