PROBLEM TO BE SOLVED: To prevent an identification part from touching medical equipment such as a needle and a scalpel, and being damaged.SOLUTION: An epidural cavity identification apparatus 1 for identifying that a needle tip of an injection needle 2 for epidural anesthesia has reached an epidural cavity, includes: a transparent or translucent case 3 connected to an injection needle 2 side a movable body 4 accommodated in the case 3 a movable body moving path 3a formed in the case 3 for movably guiding the movable body 4 a communication port 3b for communicating the movable body moving path 3a with the injection needle 2 side a vent hole 3c for communicating the movable body moving path 3a with ambient air and a movable body holding part 3d for holding the movable body 4 at a position to close the vent hole 3c. When the needle tip of the injection needle 2 has reached an epidural cavity, the movable body 4 is moved to the communication port 3b side in response to the negative pressure of the epidural cavity.COPYRIGHT: (C)2015,JPO&INPIT【課題】識別部が針やメス等の医療機器に触れて傷付いたり破損することを防止する。【解決手段】硬膜外麻酔用の注射針2の針先が硬膜外腔に達したことを識別するための硬膜外腔識別装置1であって、該識別装置1は、注射針2側に接続される透明又は半透明のケース3と、ケース3内に収容される可動体4と、ケース3内に形成され、可動体4を移動自在に案内する可動体移動経路3aと、可動体移動経路3aを注射針2側に連通させる連通口3bと、可動体移動経路3aを外気に連通させる通気口3cと、通気口3cを塞ぐ位置で可動体4を保持する可動体保持部3dとを備え、注射針2の針先が硬膜外腔に達したとき、硬膜外腔の負圧に応じて可動体4が連通口3b側に移動する。【選択図】図2
