Instrument with at least two active radio-frequency wires for treatment of tumors

Abstract

The invention concerns a medical instrument for radio-frequency induced hyperthermia treatment of tumours. It is made up of a guide needle (11) which houses two or more active radio-frequency wires (14, 15) connected at their proximal end to a radio-frequency generator and each one having a spiraled, helicoidal or spiral, distal segment (14'. 15'). The wires (14, 15) can be moved longitudinally between a completely retracted passive position in the needle to an active position where the distal segments (14', 15') of the wires protrude from the distal end of the guide needle, automatically adopting a coiled shaped.

Description

technical field [0001] The invention relates to an apparatus for radiofrequency-induced hyperthermia treatment of tumors in the form of needle electrodes. Background technique [0002] Catheter-sounds having at least one terminal electrode or needle with a straight RF active wire have been utilized in the treatment of tumor masses by means of RF-induced hyperthermia. [0003] However, catheter bougies are large and, even though they are effective because of the presence of important electrodes, catheter bougies have the disadvantage that they cannot be used until they pass through a naturally patented duct or a duct made patent by dilation. ) can only be inserted into the patient's body when they begin to contact the tumor mass. [0004] Although they can be inserted into the body by inserting needles with active leads into the tissue, their movement is limited due to the small diameter of the active leads, which affect only a limited area and thus result in longer treatmen...

AI Technical Summary

Problems solved by technology

[0003] However, catheter bougies are large and, even though they are effective because of the presence of important electrodes, catheter bougies have the disadvantage that they cannot be used until they pass through a naturally patented duct or a duct made patent by dilation. ) can only be inserted into the patient's body when they start to touch the tumor mass

[0004] Although they can be inserted into the body by inserting needles with active leads into the tissue, their movement is limited due to the small diameter of the active leads, which affect only a limited area and thus result in longer treatment cycles and time

For treatment of larger tumor masses, larger needles are used, but their use is more invasive to the patient

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