| 摘要 |
Disclosed is a catheter unit comprising a needle, an actuator body, and an elongated blunting member coupled to a flash chamber and to carriage. The blunting member is disposed coaxially within the bore of the needle. The blunting member is capable of moving from a proximal to distal position when the dist al ends of at least one of the longitudinal members is pressed on the outer surface of the distal end causing the longitudinal member to advance which in turn caus es the longitudinal member to press against a member causing the blunting member to advance from a proximal position to a distal position.
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