PROBLEM TO BE SOLVED: To provide an ultrasonic puncture needle device capable of detecting the distance between the needle tip of a puncture needle and the pleura. SOLUTION: A miniaturized ultrasonic probe system is arranged in a puncture needle, and ultrasonic signals are transmitted and received at the tip of the needle tip of the puncture needle to acquire a plurality of echo signals at an axial depth. A desired area is set based on the characteristics of the change in the amplitude of the echo signal and the characteristics of the change in the depth, and the distance between the needle end of the puncture needle and the pleura is set to the optimum value during the execution of the intercostal nerve block and the spinal nerve block. The drug administration position is displayed in real time. [Selection diagram] Figure 2【課題】穿刺針の針先と胸膜との距離を検知することが可能な超音波穿刺針装置を提供する。【解決手段】小型化した超音波プローブシステムを穿刺針内に配置し、穿刺針の針先先端において超音波信号を送受信することで、軸方向深さにおける複数のエコー信号を取得する。エコー信号の振幅の変化の特徴と深さの変化の特徴に基づいて所望の領域を設定し、穿刺針の針端と胸膜との距離を、肋間神経ブロック及び脊椎神経ブロックの実行時における最適な薬剤投与位置としてリアルタイムで表示する。【選択図】図２
