Priming And Tunneling System For A Retrograde Catheter Assembly

Patent metadata

Field	Value
Publication number	US-2020368496-A1
Application number	US-201816640688-A
Country	US
Kind code	A1
Filing date	Aug 23, 2018
Priority date	Aug 23, 2017
Publication date	Nov 26, 2020
Grant date	—

Abstract

Disclosed herein are catheter assemblies and methods thereof that address various aspects of at least the retrograde tunneling technique. The catheter assemblies include, but are not limited to, catheter assemblies configured for vascular access, catheter assemblies configured for priming, catheter assemblies configured for tunneling, and mechanisms for connecting catheter tubes to their respective catheter assemblies. The methods include, but are not limited to, priming, tunneling, and connecting catheter tubes to their respective catheter assemblies.

First claim

1 . A catheter assembly, comprising:
a proximal portion, including:
a bifurcated hub,
a pair of polymer-coated cannulas partially disposed in and extending from the bifurcated hub, and
a pair of extension tubes disposed in and extending from the bifurcated hub,
wherein the pair of 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 cannulas to extend the proximal and distal pairs 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 cannulas, thereby providing a fluid-tight connection between the catheter tube and the pair of cannulas.

2 . The catheter assembly of claim 1 , wherein the polymer of the polymer-coated cannulas is polyurethane.

3 . The catheter assembly of claim 1 , wherein the connection mechanism is a collarless connection mechanism or a collared connection mechanism including a collar configured to fit over a proximal end portion of the catheter tube.

4 . The catheter assembly of claim 1 , wherein the connection mechanism is a collarless connection mechanism including a hub-based securement feature selected from one or more circumferential protrusions including rings or barbs, a plurality of radial protrusions including pillars, spikes, or barbs, and a combination thereof.

5 . The catheter assembly of claim 1 , wherein the connection mechanism is a collarless connection mechanism including a hub-based securement feature configured to interlock with a catheter tube-based securement feature, and wherein the hub-based securement feature includes at least a lip at a distal end of a socket and the catheter tube-based securement feature includes at least a circumferential barb configured to interlock with the lip of the socket.

6 . The catheter assembly of claim 1 , wherein the connection mechanism is a collarless connection mechanism including a hub-based securement feature configured as a clamping-style hub for clamping the catheter tube on the pair of cannulas.

7 . The catheter assembly of claim 1 , wherein the connection mechanism is a collared connection mechanism including a hub-based securement feature configured to interlock with a catheter tube-based securement feature, and wherein the hub-based securement feature includes a circumferential groove and the catheter tube-based securement feature includes an over-the-hub interlocking collar.

8 . The catheter assembly of claim 1 , wherein the connection mechanism is a collared connection mechanism including a hub-based securement feature configured to interlock with a catheter tube-based securement feature, and wherein one securement feature of the hub-based securement feature and the catheter tube-based securement feature includes interlocking arms and another securement feature of the hub-based securement feature and the catheter tube-based securement feature includes receiving slots for the interlocking arms.

9 . The catheter assembly of claim 1 , wherein the connection mechanism is a collared connection mechanism including a hub-based securement feature configured to interlock with a catheter tube-based securement feature, and wherein the hub-based securement feature includes a receiver and the catheter tube-based securement feature includes a collet proper configured for disposal in the receiver.

10 . The catheter assembly of claim 1 , wherein the connection mechanism is a collared connection mechanism including a hub-based securement feature configured to interlock with a catheter tube-based securement feature, and wherein the hub-based securement feature includes a collet proper and the catheter tube-based securement feature includes a collet cap and integrated receiver configured to accept the collet proper.

11 . A catheter assembly, comprising:
a catheter tube including a pair of lumens extending from a distal end portion to a proximal end portion of the catheter tube; a flow-directing cap about the proximal end portion of the catheter tube including a valve in the flow-directing cap at a proximal end of the catheter tube; and a priming adapter including a priming stylet configured for priming both an arterial lumen and a venous lumen of the pair of lumens when the priming stylet is inserted into either the arterial lumen or the venous lumen.

12 . The catheter assembly of claim 11 , further comprising:
an over-the-wire (“OTW”) adapter including an OTW stylet configured for advancing the catheter tube in a patient over a guidewire in the OTW stylet when the OTW stylet is inserted into either the arterial lumen or the venous lumen of the pair of lumens,
wherein the OTW stylet includes a plurality of openings in an end portion of the OTW stylet coupled to the OTW adapter.

13 . The catheter assembly of claim 12 , wherein the valve at the proximal end of the catheter tube is configured to remain closed when the OTW stylet is not inserted into either the arterial lumen or the venous lumen, which enables priming both the arterial lumen and the venous lumen of the pair of lumens from the distal end portion of the catheter tube when the priming stylet is inserted into either the arterial lumen or the venous lumen.

14 . The catheter assembly of claim 12 , wherein the valve at the proximal end of the catheter tube is configured to open when the OTW stylet is inserted through the valve and into either the arterial lumen or the venous lumen, and wherein the openings in the end portion of the OTW stylet enables priming each of the arterial lumen, the venous lumen of the pair of lumens, a stylet lumen when the priming stylet is inserted into either the arterial lumen or the venous lumen at the distal end portion of the catheter tube.

15 . The catheter assembly of claim 12 , wherein the catheter tube is configured to be cut to length at a location on the catheter tube distal to the flow-directing cap for attaching the catheter tube to a pair of cannulas.

16 . A catheter tube-tunneling assembly, comprising:
a tunneling shaft having a first end portion and a second end portion; an ambidextrous handle including a hub disposed in and extending from a distal end portion of the handle,
wherein the hub is configured for insertion of the first end portion or the second end portion of the tunneling shaft into a socket of the hub; and
a lock collar configured to slide over the tunneling shaft and interlock with the hub to lock the tunneling shaft on the handle.

17 . The catheter tube-tunneling assembly of claim 16 , wherein the first end portion and the second portion of the tunneling shaft are configured for insertion into a flow-directing cap about a proximal end portion of a catheter tube.

18 . The catheter tube-tunneling assembly of claim 17 , wherein the first end portion and the second portion of the tunneling shaft are each configured with a circumferential or wedge-shaped barb configured to interlock with a complementary feature in the flow-directing cap about a proximal end portion of a catheter tube.

19 . The catheter tube-tunneling assembly of claim 16 , wherein the first end portion and the second portion of the tunneling shaft are each configured with a circumferential or wedge-shaped barb configured to interlock with a complementary feature in the socket of

Assignees

• Bard Inc C R

Inventors

• Loesener German
• Forsyth Bradley
• Stats Jason R
• Griffiths Kara

Classifications

• A61L29/085

  Macromolecular materials · CPC title

• A61M25/0194 Primary

  Tunnelling catheters · CPC title

• A61M25/0097

  characterised by the hub (connectors A61M39/10) · CPC title

• A61M25/0102

  Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod · CPC title

• A61M2025/0031

  characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment · CPC title