Patent ID: 8277463

Claim:
A medical device comprising: a first unit including a main body elongated in a vertical direction; a guide unit through which a first guide hole and a second guide hole are penetrated in the vertical direction, the guide unit protruding from a lower end of said main body in a direction orthogonal to said vertical direction; a first puncture needle of a hollow structure supported by said main body slidably in the vertical direction, and having a sharp lower end slidably inserted into said first guide hole from above; and a first holding plate integrally fixed to said first puncture needle; and a second unit including a second puncture needle of a hollow structure, having a sharp lower end slidably inserted into said second guide hole from above; and a second holding plate integrally fixed to said second puncture needle, wherein said first unit and said second unit are formed separately to be engageable with and disengageable from each other, said second holding plate of said second puncture needle inserted into said second guide hole approachably and separably abuts on said first holding plate of said first puncture needle from above, said guide unit has a first storage portion provided with said first guide hole and a second storage portion provided with said second guide hole, said first holding plate and said second holding plate include connectors approachably and separably connected to each other respectively, said main body includes a locking part locking said first puncture needle in a state in which a needlepoint of said first puncture needle is stored in said first storage portion, and wherein in a state in which said first holding plate is connected to said second holding plate on said connectors, provided that said locking part is locking said first puncture needle: (i) an upper end distance between said first puncture needle and said second puncture needle becomes smaller than a distance between said first guide hole and said second guide hole so that said second puncture needle is not in a state parallel to said first puncture needle but in a state of widening toward the lower end with respect to said first puncture needle, and (ii) a needlepoint of said second puncture needle is stored in said second storage portion.