| 摘要 |
An electrode needle with a temperature sensor, the electrode needle havin g a hollow outer needle (1), an inner needle (2), and a connection tube (3) connected to a base end section of the outer needle. The outer needle (1) is capable of being inserted into a diseased part of a patient and whose outer peripheral surface excluding the forward end portion is covered with an ins ulative coating (11). The inner needle (2) has the temperature sensor (21) a t its forward end. A high-frequency current is supplied to the outer needle via the inner needle. A base end section (22) of the inner needle is inserte d in the connection tube so as to be axially positionally adjustable by simp le operation. In the connection tube (3)is provided a spring member (32) hav ing a wound section (32a) wound around the outer periphery of the base end s ection (22) of the inner needle (2) and also having a fixation section (32b) fixed to the connection tube (3). When the base end section (22) of the inn er needle (2) is rotated in the direction opposite the winding direction of the wound section (32a), the base end section (22) of the inner needle (2) a xially moves.
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