IP Library › Granted Patent US 9,084,850
Granted Patent B2
US 9,084,850 · App. 13/947,088 · Granted Jul 21, 2015

Dialysis catheter

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Quick Facts
Patent No.
US 9,084,850
App. No.
13/947,088
Granted
Jul 21, 2015
Kind
B2
Abstract

A dialysis catheter having a first portion having a first diameter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition portion between the first portion and distal portion. The first portion includes first and second independent longitudinally extending blood withdrawal lumens and the transition portion has first and second opened areas separated by a rib, the first opened area forming a first terminal opening for the first withdrawal lumen and the second opened area forming a second terminal opening for the second withdrawal lumen. A longitudinally extending blood delivery lumen configured to deliver blood terminates in a delivery opening in the distal portion of the catheter.

Claims (19)

1. A dialysis catheter comprising a first portion having a first diameter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition portion between the first portion and distal portion, the first portion including first and second independent longitudinally extending blood withdrawal lumens extending in the first portion, the transition portion having first and second opened areas separated by a rib, the first opened area forming a first terminal opening for the first withdrawal lumen and the second opened area forming a second terminal opening for the second withdrawal lumen such that the first and second lumens terminate in longitudinal openings, the first and second opened areas being radially spaced and axially adjacent, and a longitudinally extending blood delivery lumen configured to deliver blood, the delivery lumen extending in the first portion and terminating in a delivery opening in the distal portion of the catheter, the first and second opened areas positioned proximally of the delivery opening.

2. The dialysis catheter of claim 1 , wherein the rib angles downwardly into the elongated distal portion.

3. The dialysis catheter of claim 1 , wherein the delivery lumen is substantially circular in cross-section.

4. The dialysis catheter of claim 3 , wherein the first and second withdrawal lumens have in cross section a first curved outer wall and a second curved inner wall opposite the first curved outer wall.

5. The dialysis catheter of claim 4 , wherein a length of the first curved outer wall is greater than a length of the second curved outer wall.

6. The dialysis catheter of claim 5 , wherein the first and second withdrawal lumens have a substantially linear wall joining the first curved outer wall and the second curved inner wall.

7. The dialysis catheter of claim 5 , wherein the first and second withdrawal lumens have arcuate wall portions joining the first curved outer wall and the second curved inner wall.

8. The dialysis catheter of claim 4 , wherein the delivery lumen is substantially circular in cross-section.

9. The dialysis catheter of claim 3 , wherein the first and second withdrawal lumens are radially spaced from the delivery lumen.

10. The dialysis catheter of claim 1 , wherein the delivery lumen is aligned with a central longitudinal axis of the catheter.

11. The dialysis catheter of claim 1 , wherein the rib increases the cross-sectional dimension of the catheter distal of the first and second longitudinal openings.

12. The dialysis catheter of claim 1 , further comprising an opening in a sidewall of the elongated distal portion for blood delivery.

13. The dialysis catheter of claim 12 , wherein the opening in the sidewall is positioned distal of the rib.

14. The dialysis catheter of claim 1 , wherein at least a portion of the wall thickness of the catheter in the distal portion tapers toward a distalmost end, the delivery lumen cross-sectional area remaining substantially constant throughout its length in the distal portion.

15. The dialysis catheter of claim 1 , further comprising a stiffening member removably positionable within the catheter to increase stiffness of the catheter for insertion.

16. The catheter of claim 15 , wherein a proximal portion of the stiffening member has a series of threads for mounting the stiffening member to the catheter.

17. A dialysis catheter comprising a first portion having a first diameter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition portion between the first portion and distal portion, the first portion including first and second independent blood withdrawal lumens extending in the first portion, the first withdrawal lumen terminating in the transition portion in a first terminal opening and the second withdrawal lumen terminating in a second terminal opening, the first and second terminal openings being radially spaced and axially adjacent, and a substantially circular longitudinally extending blood delivery lumen configured to deliver blood, the delivery lumen extending in the first portion and terminating in a delivery opening in the distal portion of the catheter, the first and second terminal openings positioned proximally of the delivery opening, each of the withdrawal lumens having a first outer curved wall and a second inner curved wall, the inner curved wall being closer to the delivery lumen than the outer curved wall and having a length less than a length of the outer curved wall.

18. The dialysis catheter of claim 17 , further comprising a stiffening member removably positionable within the catheter to temporarily increase stiffness of the catheter to facilitate insertion.

19. The dialysis catheter of claim 17 , wherein the first and second withdrawal lumens have arcuate wall portions joining the first curved outer wall and the second curved inner wall.

Assignments (14)
RELEASE OF SECURITY INTEREST Recorded Mar 25, 2024
From: HSBC BANK USA, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: ARGON MEDICAL DEVICES, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.; MANAN MEDICAL PRODUCTS, INC.
Reel/Frame 066883/0812 →
SECURITY INTEREST Recorded Nov 17, 2023
From: ARGON MEDICAL DEVICES, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.; MANAN MEDICAL PRODUCTS, INC.
To: HSBC BANK USA, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 065612/0206 →
CHANGE OF OWNER/ASSIGNEE ADDRESS Recorded Jan 19, 2023
From: ARGON MEDICAL DEVICES, INC.
To: ARGON MEDICAL DEVICES, INC.
Reel/Frame 062437/0600 →
TERMINATION AND RELEASE OF FIRST LIEN SECURITY INTEREST IN PATENTS Recorded Sep 13, 2019
From: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
To: ARGON MEDICAL DEVICES, INC.; MANAN MEDICAL PRODUCTS, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.
Reel/Frame 050375/0599 →
TERMINATION AND RELEASE OF SECOND LIEN SECURITY INTEREST IN PATENTS Recorded Sep 13, 2019
From: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
To: ARGON MEDICAL DEVICES, INC.; MANAN MEDICAL PRODUCTS, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.
Reel/Frame 050375/0620 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded May 10, 2018
From: ARGON MEDICAL DEVICES, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.; MANAN MEDICAL PRODUCTS, INC.
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 046127/0748 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded May 10, 2018
From: ARGON MEDICAL DEVICES, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.; MANAN MEDICAL PRODUCTS, INC.
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 046127/0602 →
RELEASE OF SECOND LIEN PATENT SECURITY AGREEMENTS RECORDED AT REEL/FRAME 037827/0460, 037827/0526, 037827/0764, AND 037827/0882 Recorded Jan 23, 2018
From: HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS ADMINISTRATIVE AGENT
To: ARGON MEDICAL DEVICES, INC.; MANAN MEDICAL PRODUCTS, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.; PROMEX TECHNOLOGIES, LLC; LUTHER MEDICAL PRODUCTS, INC.
Reel/Frame 045130/0906 →
RELEASE OF FIRST LIEN PATENT SECURITY AGREEMENTS RECORDED AT REEL/FRAME 037703/0001, 037702/0592, 037702/0580, AND 037702/0497 Recorded Jan 23, 2018
From: HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS ADMINISTRATIVE AGENT
To: ARGON MEDICAL DEVICES, INC.; MANAN MEDICAL PRODUCTS, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.; PROMEX TECHNOLOGIES, LLC
Reel/Frame 045130/0525 →
RELEASE OF FIRST LIEN PATENT SECURITY AGREEMENTS RECORDED AT REEL/FRAME 037703/0001, 037702/0592, 037702/0580, AND 037702/0497 Recorded Jan 23, 2018
From: HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS ADMINISTRATIVE AGENT
To: ARGON MEDICAL DEVICES, INC.; MANAN MEDICAL PRODUCTS, INC.; MEDICAL DEVICE TECHNOLOGIES, INC.; PROMEX TECHNOLOGIES, LLC; LUTHER MEDICAL PRODUCTS, INC.
Reel/Frame 045130/0706 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded Feb 16, 2016
From: ARGON MEDICAL DEVICES, INC.
To: HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS ADMINISTRATIVE AGENT
Reel/Frame 037827/0460 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded Feb 5, 2016
From: ARGON MEDICAL DEVICES, INC.
To: HEALTHCARE FINANCIAL SOLUTIONS, LLC, AS ADMINISTRATIVE AGENT
Reel/Frame 037703/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 25, 2016
From: DEFONZO, STEPHAN A.; LEEDLE, JOHN D.
To: REX MEDICAL, L.P.
Reel/Frame 037576/0101 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 11, 2016
From: REX MEDICAL, L.P.
To: ARGON MEDICAL DEVICES, INC.
Reel/Frame 037472/0151 →