Catheter system with extendable extension tube

Patent metadata

Field	Value
Publication number	US-11660423-B2
Application number	US-202016989293-A
Country	US
Kind code	B2
Filing date	Aug 10, 2020
Priority date	Aug 28, 2019
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A catheter system may include a catheter adapter having a distal end, a proximal end, and a lumen extending therebetween. The system may include a catheter tube extending distally from the catheter adapter. The system may include an extension tube coupled to the proximal end of the catheter adapter. The extension tube may be extendable. The system may include a locking mechanism coupled to the extension tube and removably coupled to the proximal end of the catheter adapter. The system may include a needle hub removably coupled to a proximal end of the extension tube and an introducer needle extending through the catheter tube. A proximal end of the introducer needle may be secured within the needle hub.

First claim

The invention claimed is:

1. A catheter system, comprising:
a catheter adapter having a distal end, a proximal end, and a lumen extending therebetween, the catheter adapter further comprising a flange;
a catheter tube extending distally from the catheter adapter;
an extension tube, comprising a distal end and a proximal end, wherein the distal end of the extension tube is coupled to the proximal end of the catheter adapter, wherein the extension tube is extendable;
a septum holder coupled to the proximal end of the extension tube;
a septum disposed within the septum holder;
a lever extending from the septum holder, wherein a distal end of the lever comprises a lip configured to engage with the flange;
a needle hub removably coupled to the septum holder, wherein when the extension tube is in a compressed state, the extension tube is immediately surrounded by the needle hub and the lever; and
an introducer needle extending through the catheter tube, wherein a proximal end of the introducer needle is secured within the needle hub.

2. The catheter system of claim 1 , wherein the extension tube is corrugated, such that the extension tube is flexible when extended.

3. The catheter system of claim 1 , wherein the extension tube is resilient and retains shape when curved.

4. The catheter system of claim 1 , in response to a depression of a proximal end of the lever, the lip is configured to disengaged from the flange of the catheter adapter.

5. The catheter system of claim 4 , wherein the extension tube is compressed when the lip and the flange are engaged and is extendable when the lip and the flange are disengaged.

6. The catheter system of claim 1 , wherein the introducer needle is withdrawable through the extension tube when the extension tube is compressed, extended, or while the extension tube is being extended.

7. The catheter system of claim 1 , further comprising a luer connector coupled to the proximal end of the extension tube.

8. The catheter system of claim 1 , wherein a flash chamber is disposed within the needle hub and extends in a proximal direction from a proximal end of the needle hub.

9. The catheter system of claim 1 , wherein the needle hub further comprises a paddle grip.

10. The catheter system of claim 1 , further comprising a flash chamber disposed within a proximal end of the needle hub and configured such that in response to insertion of the catheter tube into the vein of the patient, blood flows into the flash chamber.

11. The catheter system of claim 10 , wherein the catheter adapter further comprises at least one wing that extends outwardly from the catheter adapter.

12. The catheter system of claim 11 , wherein the needle hub further comprises a paddle grip, wherein the at least one wing comprises an upper surface and a lower surface, wherein the upper surface comprise a grip and the lower surface comprises a recess, wherein the recess couples with a grip on an upper surface of the paddle grip when a tip of the introducer needle is withdrawn within the catheter tube.

13. The catheter system of claim 10 , wherein the flash chamber comprises an air vent.

14. The catheter system of claim 10 , wherein the flash chamber has a capacity between about 2 ml to about 3 ml.

15. The catheter system of claim 10 , wherein the flash chamber is transparent.

16. A catheter system, comprising:
a catheter adapter having a distal end, a proximal end, and a lumen extending therebetween, the catheter adapter further comprising a flange;
a catheter tube extending distally from the catheter adapter;
an extension tube, comprising a distal end and a proximal end, wherein the distal end of the extension tube is coupled to the proximal end of the catheter adapter, wherein the extension tube is extendable;
a septum holder coupled to the proximal end of the extension tube;
a septum disposed within the septum holder;
a lever extending from the septum holder, wherein a distal end of the lever comprises a lip configured to engage with the flange;
a needle hub removably coupled to the septum holder, wherein the needle hub comprises a cutout extending from a distal end of the needle hub, wherein the lever is disposed within the cutout, wherein when the extension tube is in a compressed state, the extension tube is immediately surrounded by the needle hub and the lever; and
an introducer needle extending through the catheter tube, wherein a proximal end of the introducer needle is secured within the needle hub.

Assignees

• Becton Dickinson Co

Inventors

• Kumar Jithendra

Classifications

• A61M25/0606 Primary

  "Over-the-needle" catheter assemblies, e.g. I.V. catheters · CPC title

• A61M25/0693

  Flashback chambers · CPC title

• A61M2025/0024

  Expandable catheters or sheaths · CPC title

• A61M2005/1402

  Priming · CPC title

• A61M25/0637

  Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin · CPC title