| 摘要 |
<p>The present application relates to an access device for placing a medical article within a body space, comprising: a needle having a needle body; a dilator coaxially disposed about the needle body; a lock member configured to move between a lock state and an unlock state, the lock member connecting the needle to the dilator so as to inhibit at least relative axial movement between at least a portion of the needle and at least a portion of the dilator when the lock member is in at least the lock state; a guidewire configured to be coaxially disposed within at least a portion of the needle body; and a release member configured to engage with the lock member so as to at least move the lock member from the lock state to the unlock state.
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