Cannula capture mechanism

A catheter device, comprising:

• a cannula capture mechanism comprising:
• an outer housing;
• an inner housing, wherein at least a portion of the inner housing is disposed within the outer housing;
• and
• a cannula that extends into the inner housing, wherein when the cannula is exposed from a distal end of the inner housing, a distal portion of the inner housing has a first diameter, wherein when the cannula is retracted proximally within the inner housing, the distal portion of the inner housing has a second diameter and a distal end of the outer housing is configured to slide distally over the distal portion of the inner housing to seal the distal end of the inner housing, wherein the first diameter is greater than the second diameter.

A catheter device, comprising:

• a cannula capture mechanism comprising:
• an outer housing configured to move between a compressed and an decompressed state;
• an inner housing, wherein an outer surface of the inner housing includes one or more interlock components;
• and
• a cannula that extends into the inner housing, wherein when the cannula is exposed from a distal end of the inner housing, the one or more interlock components interact with one or more interlock surfaces formed in another surface of the catheter device, wherein when the cannula is retracted proximally within the inner housing, the inner housing contracts radially inward causing the one or more interlock components to be separated from the one or more interlock surfaces and the outer housing to move to the decompressed state and extend distally over a distal portion of the inner housing to prevent the cannula from exiting the distal end of the inner housing.