In one embodiment, an access sheath includes a sheath assembly including sheath tubing, the sheath tubing having a main lumen and a secondary lumen that extends along the length of the main lumen. The main lumen has a first cross-sectional area, a first length, and a distal end outlet. The secondary lumen has a second cross-sectional area less than the first cross-sectional area, a second length less than the first length, and a distal end outlet terminating proximal of the main lumen distal outlet.
