US 12,403,286 B2
Passive dilation in catheter insertion systems
Joe Spataro, Cottonwood Heights, UT (US); Daniel B. Blanchard, Bountiful, UT (US); Kyle G. Thornley, Farmington, UT (US); and Austin J. Mckinnon, Herriman, UT (US)
Assigned to Bard Access Systems, Inc., Salt Lake City, UT (US)
Filed by Bard Access Systems, Inc., Salt Lake City, UT (US)
Filed on Dec. 3, 2021, as Appl. No. 17/542,096.
Claims priority of provisional application 63/121,761, filed on Dec. 4, 2020.
Prior Publication US 2022/0176081 A1, Jun. 9, 2022
Int. Cl. A61M 25/00 (2006.01); A61M 25/06 (2006.01)
CPC A61M 25/0662 (2013.01) [A61M 25/0068 (2013.01); A61M 25/0082 (2013.01); A61M 2025/0687 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A catheter configured to enter a skin insertion site, comprising:
a hub disposed proximally and including one or more extension legs extending proximally therefrom;
a catheter tube extending distally from the hub and defining a first catheter lumen and a second catheter lumen, each of which are in fluid communication with an extension leg of the one or more extension legs;
a tapered junction coupled to a distal end of the catheter tube and including a dilation structure configured to dilate the skin insertion site, the dilation structure comprising:
a first protrusion extending along a longitudinal axis between a first distal edge and a first proximal edge and extending along a lateral axis to a first apex, the first apex disposed proximate a first mid-point between the first distal edge and the first proximal edge, the first protrusion including a first cutting edge; and
a second protrusion extending along the longitudinal axis between a second distal edge and a second proximal edge and extending along the lateral axis to a second apex, the second apex disposed proximate a second mid-point between the second distal edge and the second proximal edge, the second protrusion including a second cutting edge; and
a distal portion extending from a distal end of the tapered junction, the distal portion having a diameter smaller than a diameter of a proximal portion of the catheter tube and defining a distal part of the first catheter lumen, the second catheter lumen terminating at an aperture disposed in a side wall and disposed adjacent the distal end of the catheter tube.