US 11,896,782 B2
Priming and tunneling system for a retrograde catheter assembly
German Loesener, Riverton, UT (US); Bradley Forsyth, Sandy, UT (US); and Jason R. Stats, Layton, UT (US)
Assigned to C. R. Bard, Inc., Franklin Lakes, NJ (US)
Appl. No. 16/640,688
Filed by C. R. Bard, Inc., Franklin Lakes, NJ (US)
PCT Filed Aug. 23, 2018, PCT No. PCT/US2018/047831
§ 371(c)(1), (2) Date Feb. 20, 2020,
PCT Pub. No. WO2019/040801, PCT Pub. Date Feb. 28, 2019.
Claims priority of provisional application 62/631,471, filed on Feb. 15, 2018.
Claims priority of provisional application 62/549,354, filed on Aug. 23, 2017.
Claims priority of provisional application 62/549,359, filed on Aug. 23, 2017.
Prior Publication US 2020/0368496 A1, Nov. 26, 2020
Int. Cl. A61M 25/01 (2006.01); A61M 25/00 (2006.01); A61M 25/02 (2006.01); A61M 39/10 (2006.01)
CPC A61M 25/0194 (2013.01) [A61M 25/0028 (2013.01); A61M 25/0097 (2013.01); A61M 25/0102 (2013.01); A61M 25/02 (2013.01); A61M 39/105 (2013.01); A61M 2025/0286 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A catheter assembly, comprising:
a proximal portion, including:
a bifurcated hub,
a pair of polymer-coated cannulas partially disposed in and extending from a bore of the bifurcated hub, and
a pair of extension tubes disposed in and extending from the bifurcated hub, wherein the pair of polymer-coated cannulas and the pair of extension tubes form a proximal pair of lumens extending through the proximal portion of the catheter assembly;
a distal portion, including a catheter tube having a distal pair of lumens extending through the distal portion of the catheter assembly,
wherein the catheter tube is configured to fit over the pair of polymer-coated cannulas to extend the proximal pair of lumens and the distal pair of lumens through an entirety of the catheter assembly as an extended pair of lumens; and
a connection mechanism to connect the catheter tube to the pair of polymer-coated cannulas and provide a fluid-tight connection between the catheter tube and the pair of polymer-coated cannulas, the connection mechanism including a hub-based securement feature disposed within the bore of the bifurcated hub and oriented radially inward toward an axis of the bore in order to engage an outer surface of the catheter tube, the hub-based securement feature selected from the group consisting of one or more circumferential protrusions including rings or barbs, a plurality of radial protrusions including pillars, spikes, or barbs, and a combination thereof,
wherein the hub-based securement feature is configured to displace in a proximal direction upon insertion of the catheter tube into the bore.