Two-piece catheters and methods thereof

A method of using a two-piece catheter, comprising:

• obtaining the two-piece catheter including a distal catheter piece and a proximal catheter piece, the distal catheter piece including a catheter tube coupled to a distal catheter-hub piece of a two-piece catheter hub, and the proximal catheter piece including one or more extension legs coupled to a proximal catheter-hub piece of the two-piece catheter hub;
• establishing a needle tract from an area of skin to a blood-vessel lumen of a patient with an introducer needle disposed in an introducing lumen of the distal catheter piece such that a needle tip of the introducer needle extends out of an introducing-lumen aperture of the introducing lumen;
• withdrawing the introducer needle from the introducing lumen;
• and
• clipping together the distal catheter-hub piece and the proximal catheter-hub piece, a first catheter-hub piece of the distal catheter-hub piece or the proximal catheter-hub piece including one or more rigid tubes respectively disposed in one or more catheter-hub lumens thereof, and the second catheter-hub piece of the distal catheter-hub piece or the proximal catheter-hub piece including one or more gaskets respectively disposed in the one or more catheter-hub lumens thereof configured to sit between the one or more rigid tubes and the one or more catheter-hub lumens, thereby respectively connecting across the two-piece catheter hub one or more catheter-tube lumens of the catheter tube and one or more extension-leg lumens of the one or more extension legs with one or more fluid-tight luminal seals due to compression of the one or more gaskets in the one or more catheter-hub lumens of a first catheter-hub piece of the proximal catheter-hub piece or the distal catheter-hub piece by compression annuli of the second catheter-hub piece of the proximal catheter-hub piece or the distal catheter-hub piece.