Twist-lock linkage for introducer sheath

A locking device for coupling medical devices, comprising:

• an inner component having an outer wall forming a substantially cylindrical body having an inward-facing surface and an outward-facing surface, the substantially cylindrical body defining a first end and a second end, the substantially cylindrical body including a middle shelf portion intermediate the first end and second end that extends in a radially inward from the inward-facing surface;
• where the outward-facing surface includes an outer circumferential channel extending at least partially around the outward-facing surface intermediate between the first end and the second end, where the outward-facing surface has at least one tab or thread at the first end extending radially outward, and where the inward-facing surface has at least one tab or thread at the second end extending radially inward;
• and
• an outer component having an outer body surrounding the outward-facing surface, the outer component including a protrusion or pin extending radially inward, the protrusion or pin configured to extend into the outer circumferential channel of the inner component;
• wherein a central channel is cut through the outer body and the substantially cylindrical body, extending radially inward from an outer surface and passing through a portion of the outer wall forming the substantially cylindrical body and a portion of the middle shelf portion, the central channel having a defined width;
• and
• wherein the middle shelf portion includes an elevated portion surrounding a portion of the central channel, the elevated portion being a distance>0 mm away from the central channel, and extending towards either the first end or the second end.