Dialysis catheter

• US 7,074,213 B2
• Filed: 08/23/2004
• Issued: 07/11/2006
• Est. Priority Date: 01/09/2001
• Status: Expired due to Term

• Current Assignee: Argon Medical Devices
• Original Assignee: REX Medical LP
• Inventors: McGuckin, James F. Jr., Hinchliffe, Peter W. J., Paris, Michael W., Tashjian, Paul
• Primary Examiner(s): KENNEDY, SHARON E
• Application Number:
  US10/924,075
• Publication Number:
  US 20050054989A1
• Time in Patent Office: 687 Days
• Field of Search: 604/43, 604/104, 604/105, 604/107, 604/164.01, 604/164.09, 604/164.13, 604/264, 604506-510, 604/523
• US Class Current: 604/264
• CPC Class Codes: A61M 1/285 Catheters therefor
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0036 with more than four lumina
• CPC Class Codes: A61M 2025/0081 Soft tip
• CPC Class Codes: A61M 25/0028 characterized by features relating to at least one lumen located at the proximal part of the catheter, e.g. alterations in lumen shape or valves catheter hubs A61M25/0097
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0069 Tip not integral with tube
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0071 Multiple separate lumens multiple separate lumens throughout the catheter A61M25/0026
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
• CPC Class Codes: A61M 25/0194 Tunnelling catheters
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/09041 Mechanisms for insertion of guide wires

Abstract

A dialysis catheter comprising a catheter body having a proximal portion, a distal portion, a first longitudinally extending central lumen configured to deliver blood, and at least three longitudinally extending lumens positioned radially of the central lumen and configured to withdraw blood from a patient. At least one blood delivery opening is formed in the distal portion of the catheter body and in fluid communication with the first lumen and configured for passage of blood therethrough. At least three blood withdrawal openings are formed in the outer wall of the catheter body, wherein each of the openings is in fluid communication with one of the at least three lumens and is configured for passage of blood from a patient.

Claims

1. A catheter comprising:

a catheter body having a proximal portion, a distal portion, a first longitudinally extending central lumen, and at least three longitudinally extending lumens positioned radially of the first lumen and and adapted to communicate with a body of the patient, each of the at least three lumens terminating in an opening;

a distal opening formed in the distal portion of the catheter body, the distal opening being in fluid communication with the first lumen; and

the openings in the at least three lumens positioned proximally of the distal opening;

wherein the catheter has a distal region having a first diameter and a second region proximal of the distal region having a second diameter, the first diameter being less than the second diameter to form a reduced diameter region, and the catheter including wall portions extending distally from the second region to the reduced diameter region.

2. The catheter of claim 1, wherein the openings in the at least three lumens are axially aligned.

3. The catheter of claim 1, wherein the openings in the at least three lumens are elongated in an axial direction and intersect a transverse plane of the catheter.

4. The catheter of claim 1, wherein the first lumen of the catheter body is configured to receive a stiffening member and a guidewire.

5. The catheter of claim 1, further comprising a stiffening member removably positionable within the first lumen of the catheter body, the stiffening member having a lumen to receive a guidewire for over the wire insertion of the catheter and stiffening member.

6. The catheter of claim 1, wherein the distal portion of the catheter terminates in a tapered tip.

7. The catheter of claim 1, wherein the cross-sectional area of each of the at least three lumens is substantially equal and is less than the cross-sectional area of the first lumen.

8. The catheter of claim 1, wherein the cross-sectional area of each of the at least three lumens is less than the cross-sectional area of the first lumen.

9. The catheter of claim 1, wherein the lumens of each of the at least three longitudinally extending lumens are of the same cross-sectional configuration.

10. The catheter of claim 1, further comprising at least one hole formed in a side of the catheter body fluidly communicating with the first lumen.

11. The catheter of claim 1, wherein the central lumen is circular in cross-section and the at least three lumens are arc-shaped in cross section.

12. A catheter comprising:

a catheter body having a proximal portion, a distal portion, a first longitudinally extending central lumen, and at least three longitudinally extending lumens positioned radially of the first lumen and adapted to communicate with a body of the patient, each of the at least three lumens terminating in an opening;

a distal opening formed in the distal portion of the catheter body, the distal opening being in fluid communication with the first lumen; and

the openings in the at least three lumens positioned proximally of the distal opening;

wherein the first lumen of the catheter body is configured to receive a stiffening member and a guidewire, the stiffening member extending distally of the distal opening.

13. The catheter of claim 12, wherein the stiffening member is secured to the catheter.

14. The catheter of claim 13, wherein the stiffening member is secured to the catheter by a threaded engagement.

15. The catheter of claim 12, wherein the distal portion of the catheter body has a reduced diameter region.

16. The catheter of claim 12, wherein the central lumen is circular in cross-section and the at least three lumens are arc-shaped in cross section.

17. A catheter comprising:

a catheter body having a proximal portion, a distal portion, a first longitudinally extending central lumen, and at least three longitudinally extending lumens positioned radially of the first lumen and adapted to communicate with a body of the patient, each of the at least three lumens terminating in an opening;

a distal opening formed in the distal portion of the catheter body, the distal opening being in fluid communication with the first lumen; and

the openings in the at least three lumens positioned proximally of the distal opening;

wherein the cross-sectional area of each of the at least three lumens is less than the cross-sectional area of the first lumen.

18. The catheter of claim 17, wherein the cross-sectional area of each of the at least three lumens is substantially equal.

19. The catheter of claim 18, wherein the distal portion of the catheter body has a reduced diameter region.

20. The catheter of claim 17, wherein the central lumen is circular in cross-section and the at least three lumens are arc-shaped in cross section.