Bi-directional cannula feature capture mechanism

摘要

A bi-directional cannula feature capture mechanism is described herein. Generally, the capture mechanism comprises an inner housing, an outer housing, and a cannula. The inner housing comprises a proximal and a distal cannula feature mating component. The outer housing is adapted to slidably receive the inner housing in a proximal direction. Additionally, the cannula extends through the inner housing and the cannula's feature has a proximal engagement and a distal engagement. The proximal and distal engagements are respectively configured to irreversibly engage the proximal and distal cannula feature mating components when the cannula tip is moved into a shielded position.

主权项

1. A catheter device, comprising:
a bi-directional cannula feature capture mechanism comprising:
an inner housing comprising a body, the body comprising a proximal cannula feature mating component and a distal cannula feature mating component;an outer housing, the body of the inner housing received in the outer housing in a manner that allows the body of the inner housing to translate proximally through the outer housing, an inner surface of the outer housing including at least one catch that prevents the inner housing from moving distally within the outer housing after the inner housing has been proximally retracted into the outer housing; anda cannula that extends into the inner housing and comprises a cannula feature having a proximal engagement surface and a distal engagement surface, wherein when the cannula is retracted proximally within the inner housing, the proximal engagement surface contacts the proximal cannula feature mating component, and wherein after the cannula is retracted proximally into the inner housing, the distal cannula feature mating component contacts the distal engagement surface to limit the distal movement of the cannula thereby shielding the cannula within the bi-directional cannula capture mechanism; and a catheter adapter having an inner surface, wherein the outer housing is disposed within a lumen of the catheter adapter, wherein the inner surface of the catheter adapter is adapted to uncouple from the body of the inner housing to free the bi-directional cannula feature capture mechanism from the catheter adapter when the cannula is shielded within the bi-directional cannula feature capture mechanism.