Patent ID: 8187264
Filing Date: 2012-05-29
Classification: A61B

Abstract:
1. A needle electrode device with a temperature sensor, having a hollow outer needle, which can be pierced into an affected area and is coated with an insulating layer on an outer peripheral surface except at its distal end, and an inner needle, which is inserted into the outer needle and has the temperature sensor at its distal end, so that a high frequency current is supplied to the outer needle through the inner needle, and having a coupled tube coupled to a rear end of the outer needle, so that a rear end of the inner needle is inserted into the coupled tube in such a way as to be freely adjustable in its position in an axial direction, wherein: the coupled tube is provided inside with a spring member including a winding portion to be wound around an outer circumference of the rear end of the inner needle and a fixed portion fixed to the coupled tube; the spring member is composed of a spiral spring, a radial inner portion of the spiral spring being used as the winding portion and a radial outer portion thereof being used as the fixed portion; and the rear end of the inner needle can be moved in the axial direction by rotating the rear end of the inner needle in the opposite direction to a winding direction of the winding portion.