Triple Lumen Catheter

• US 20090247868A1
• Filed: 03/26/2009
• Published: 10/01/2009
• Est. Priority Date: 03/26/2008
• Status: Active Grant

• Current Assignee: Medical Components, Inc.
• Original Assignee: Medical Components, Inc.
• Inventors: Chesnin, Kenneth J.
• Granted Patent: US 9,314,586 B2
• Time in Patent Office: Days
• US Class Current: 600/435
• CPC Class Codes: A61M 2025/0035 characterized by a variable lumen cross-section by means of a resilient flexible septum or outer wall
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/0026 Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175
• 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

Abstract

A multi-lumen catheter comprising a longitudinally extending elongated body portion, with at least two septa extending longitudinally therethrough the entire body portion, defining a central lumen and two side lumens. The central lumen is of oblong shape in cross section, and is positioned between the side lumens. The septa that form the central lumen are configured to be capable of flexing outwards when the central lumen is under pressure, such as when used in procedures that require power injection, whereby a cross sectional area of the central lumen resultantly increases to increase flow capacity through the central lumen. In some embodiments, the central lumen has a defining inner surface such that a radius of curvature of the central lumen inner surface is, in all locations, equal to or greater than a radius of curvature of an outer surface of a guide wire used for insertion of the multi-lumen catheter. The septa are each configured to fail under pressure before failure of the outer wall.

Claims

1. A multi-lumen intravenous catheter comprising:

an elongated body portion having an outer wall extending longitudinally between proximal and distal ends, wherein;

two septa extend longitudinally through the elongated body portion, wherein the septa and the outer wall define a central lumen and two side lumens,

the central lumen has a generally oblong shape in cross section and is positioned between the two side lumens, and

each of the septa are configured to flex when the central lumen is under pressure, whereby a cross sectional area of the central lumen resultantly increases to increase flow capacity through the central lumen; and

a plurality of extension tubes, each having a first end and a second end, extending generally longitudinally away from the proximal end of the body portion, wherein the first ends of the extension tubes connect to the proximal end of the body portion, the central lumen and the two side lumens each form a fluid tight connection to a respective extension tube.

2. The multi-lumen catheter of claim 1, further comprising:

a plurality of connectors, wherein a connector is located at a second end of each of the extension tubes.

3. The multi-lumen catheter of claim 1, wherein the central lumen has a rounded top and bottom inner surface.

4. The multi-lumen catheter of claim 1, wherein the central lumen has a generally stadium shape.

5. The multi-lumen catheter of claim 1, wherein the central lumen having generally concave side surfaces and rounded top and bottom surfaces at normal atmospheric pressure, and generally convex side surfaces when under pressure.

6. The multi-lumen catheter of claim 1, wherein a radius of curvature of an inner surface of each of the side lumens is in all locations equal to or greater than a radius of curvature of an outer wall of a guide wire used for insertion of the multi-lumen catheter.

7. The multi-lumen catheter of claim 1, wherein a minimal thickness of the outer wall is larger than a thickness of each of the septa.

8. The multi-lumen catheter of claim 1, wherein the outer wall is more rupture resistant than either of the septa.

9. The multi-lumen catheter of claim 1, wherein each of the septa is configured to have less mechanical strength under catheter pressure than the outer wall, whereby catheter rupture will occur in one or both of the septa prior to in the outer wall.

10. The multi-lumen catheter of claim 1, wherein each of the septa is configured to fail under catheter pressure before failure of the outer wall.

11. The multi-lumen catheter of claim 1, wherein the sum of the cross sectional areas of the two side lumens is less than the cross sectional area of the central lumen.

12. The multi-lumen catheter of claim 1, wherein the sum of the cross sectional areas of the two side lumens does not equal the cross sectional area of the central lumen.

13. The multi-lumen catheter of claim 1, wherein the side lumen is of generally “

D”

shape.

14. The multi-lumen catheter of claim 1, wherein the side lumen is of generally “

C”

shape.

15. The multi-lumen catheter of claim 1, wherein the side lumen is of generally circular shape.

16. The multi-lumen catheter of claim 1, wherein the side lumen is of generally elliptical shape.

17. A multi-lumen intravenous catheter comprising an elongated body portion including:

an outer wall extending longitudinally along and forming the elongated body portion between proximal and distal ends; and

two septa extending longitudinally along, through, and forming the elongated body portion, wherein;

the two septa and the outer wall define a central lumen and two side lumens;

the central lumen has an inner surface defining a generally stadium shape of the central lumen; and

a radius of curvature of the inner surface of the central lumen is, in all locations, equal to or greater than a radius of curvature of an outer surface of a guide wire used for insertion of the multi-lumen catheter.

18. A multi-lumen intravenous catheter comprising an elongated body portion including:

an outer wall extending longitudinally along and forming the elongated body portion between proximal and distal ends; and

two septa extending longitudinally along, through, and forming the elongated body portion, wherein;

the two septa and the outer wall define a central lumen and two side lumens; and

each of the septa is configured to fail under catheter pressure before failure of the outer wall.

19. A multi-lumen intravenous catheter comprising an elongated body portion including:

an outer wall extending longitudinally along and forming the elongated body portion between proximal and distal ends; and

two septa extending longitudinally along, through, and forming the elongated body portion, wherein;

the two septa and the outer wall define a central lumen and two side lumens; and

each of the septa is configured to have less mechanical strength under catheter pressure than the outer wall, whereby catheter rupture will occur in one or both of the septa prior to in the outer wall.

20. A multi-lumen intravenous catheter comprising an elongated body portion including:

an outer wall extending longitudinally along and forming the elongated body portion between proximal and distal ends; and

two flexible septa extending longitudinally along, through, and forming the elongated body portion, wherein;

the two septa and the outer wall define a central lumen and two side lumens; and

the central lumen having generally concave side surfaces and rounded top and bottom surfaces at normal atmospheric pressure, and generally convex side surfaces when under pressure.

21. The multi-lumen catheter of claim 20, wherein a minimal thickness of the outer wall is larger than a thickness of each of the septa.

22. The multi-lumen catheter of claim 20, wherein the outer wall is more rupture resistant than either of the septa.

23. The multi-lumen catheter of claim 20, wherein each of the septa is configured to have less mechanical strength under catheter pressure than the outer wall, whereby catheter rupture will occur in one or both of the septa prior to in the outer wall.

24. The multi-lumen catheter of claim 20, wherein each of the septa is configured to fail under catheter pressure before failure of the outer wall.

25. The multi-lumen catheter of claim 20, wherein the sum of the cross sectional areas of the two side lumens is less than the cross sectional area of the central lumen.

26. The multi-lumen catheter of claim 20, wherein the sum of the cross sectional areas of the two side lumens is greater than the cross sectional area of the central lumen.

27. The multi-lumen catheter of claim 20, wherein the side lumen is of generally “

D”

shape.

28. The multi-lumen catheter of claim 20, wherein the side lumen is of generally “

C”

shape.

29. The multi-lumen catheter of claim 20, wherein the side lumen is of generally circular shape.

30. The multi-lumen catheter of claim 20, wherein the side lumen is of generally elliptical shape.

31. The multi-lumen catheter of claim 20, wherein a radius of curvature of the inner surface of at least one of the side lumen is, in all locations, equal to or greater than a radius of curvature of an outer surface of a guide wire used for insertion of the multi-lumen catheter.

32. A multi-lumen intravenous catheter comprising:

an elongated body portion as described in claim 20; and

a plurality of extension tubes, each having a first end and a second end, extending generally longitudinally away from the proximal end of the body portion, wherein the first ends of the extension tubes connect to the proximal end of the body portion, the central lumen and the two side lumens each form a fluid tight connection to a respective extension tube.

33. The multi-lumen catheter of claim 32, further comprising:

a plurality of connectors, wherein a connector is located at a second end of each of the extension tubes.

34. A multi-lumen intravenous catheter comprising an elongated body portion including:

an outer wall extending longitudinally along and forming the elongated body portion between proximal and distal ends; and

at least two septa extending longitudinally along, through, and forming the elongated body portion, wherein;

the at least two septa and the outer wall define a central lumen and at least two side lumens, wherein the central lumen is located essentially at the center of the catheter body, and at least one of the side lumen is located on a first side of the central lumen and at least one side lumen is located on a second side of the central lumen, wherein;

the septa that define the central lumen are configured to flex when the central lumen is under pressure, whereby a cross sectional area of the central lumen resultantly increases to increase flow capacity through the central lumen.