A bi-directional cannula feature capture mechanism (30) is described herein.Generally, the capture mechanismcomprises an inner housing (80), an outer housing (100), and a cannula (40).The inner housing comprises a proximal and a distalcannula feature mating component. The outer housing is adapted to slidablyreceive the inner housing in a proximal direction.Additionally, the cannula extends through the inner housing and the cannula'sfeature has a proximal engagement and a distalengagement. The proximal and distal engagements are respectively configured toirreversibly engage the proximal and distal cannulafeature mating components when the cannula tip is moved into a shieldedposition.
