Patent ID: 8900192
Filing Date: 2014-12-02
Classification: A61B,A61M

Abstract:
1. An access device for placing a medical article within a body space, comprising: a needle having an elongated needle body with a distal end and a hub from which the needle body extends; a dilator disposed on the needle body, the needle and the dilator being moveable relative to each other from a first position, wherein the distal end of the needle lies distal of the dilator, and a second position wherein the distal end of the needle lies within the dilator, the dilator including a dilator hub and an elongated dilator shaft that extends from the dilator hub; and a locking mechanism operating between the needle and the dilator to inhibit movement of the needle in both proximal and distal directions relative to the dilator when in the second position while pulled or pushed in the proximal or distal directions relative to each other, the locking mechanism being configured to allow movement of the needle from the first position toward the second position without engagement by the locking mechanism so as to lessen resistance to the movement, such that the distal end of the needle is directly laterally protected by the dilator while in the second position.