| 摘要 |
PURPOSE: A needle for the backbone rearward nerve blocking is provided to form an inclined surface between a lead hole and a penetration unit of an outer needle in an arc, thereby minimizing the resistance of withdraws of an inner needle by minimizing the contact with the inner needle. CONSTITUTION: An inner needle(200) is withdrawn by being inserted to a penetration unit(110) of an outer needle. A lead hole(120) is formed in the end of the penetration unit. An inclined surface(130) which is inclined to the lead hole is formed between the lead hole and penetration unit. The inclined surface is formed in the arc and minimizes the contact with the inner needle. In the outer needle, a sleeve(140) is equipped. In the inner needle, a plunger(220) which is inserted into the sleeve is equipped.
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