Catheter assembly including a multi-lumen configuration

1. A catheter assembly, comprising:

an elongate catheter tube defining first, second, and third lumens, wherein:

the first and second lumens include a modified reniform cross-sectional shape;

the third lumen includes a substantially circular cross-sectional shape; and

the catheter tube includes:

a first lateral opening in fluid communication with the first lumen, the first lateral opening defined by an angled cross cut including a first cut and a second cut opposite of the first cut, each of the first cut and the second cut having a long axis at an oblique angle with a longitudinal axis of the elongate catheter tube; and

a second lateral opening in fluid communication with the second lumen, the second lateral opening defined by an angled cross cut.

2. The catheter assembly as defined in claim 1 , wherein the first and second lumens are mirror images of one another about a center line of the catheter tube.

3. The catheter assembly as defined in claim 1 , wherein a cross section of an outer surface of the catheter tube defines a flattened oval shape.

4. The catheter assembly as defined in claim 1 , wherein the third lumen is configured to withstand pressures associated with power injection of a fluid therethrough.

5. The catheter assembly as defined in claim 4 , wherein the catheter tube further includes a distal end opening in fluid communication with the third lumen.

6. The catheter assembly as defined in claim 5 , wherein the catheter tube includes a tapered distal region, the distal end opening disposed at a distal tip of the tapered distal region.

7. The catheter assembly as defined in claim 6 , wherein the first and second lateral openings are positioned in an un-staggered position on a distal portion of the catheter tube.

8. The catheter assembly as defined in claim 7 , wherein a portion of the first lateral opening and the second lateral opening is disposed on the tapered distal region.

9. The catheter assembly as defined in claim 1 , wherein a septum separates the first lumen, the second lumen, and the third lumen, the septum including an hourglass-shaped portion.

10. The catheter assembly as defined in claim 1 , wherein each of the first and second lumens cross-sectionally includes a concavity, the concavity disposed adjacent the third lumen.

11. The catheter assembly as defined in claim 10 , wherein each of the first and second lumens cross-sectionally includes first and second corners, the concavity interposed in an offset configuration between the first and second corners.

12. A multi-lumen configuration for a catheter tube, an outer surface of the catheter tube defining a flattened oval cross sectional shape with opposing flat sides, the multi-lumen configuration including:

a first lumen; and

a second lumen substantially identically shaped to the first lumen, the first and second lumens each defining a cross sectional shape, including:

an arcuate portion;

rounded first and second corners disposed at either end of the arcuate portion; and

a concavity opposite the arcuate portion and interposed between the first and second corners.

13. The multi-lumen configuration as defined in claim 12 , wherein the concavity is disposed in an offset configuration with respect to the first and second corners.

14. The multi-lumen configuration as defined in claim 12 , wherein the first and second lumens each generally define a reniform cross-sectional shape.

15. The multi-lumen configuration as defined in claim 12 , wherein the catheter tube further includes a substantially round third lumen.

16. The multi-lumen configuration as defined in claim 15 , wherein the first, second, and third lumens are separated by a septum, the septum including a unified portion and a bifurcated portion, the third lumen being bounded by the bifurcated portion.

17. The multi-lumen configuration as defined in claim 16 , wherein the septum is centered on a center line of the catheter tube such that the first and second lumens are disposed in a mirror-image configuration about the center line.

18. The multi-lumen configuration as defined in claim 12 , wherein the catheter tube further includes an first lateral opening in fluid communication with the first lumen, a second lateral opening in fluid communication with the second lumen, and a plurality of side holes in fluid communication with one of the first and second lumens.

19. The multi-lumen configuration as defined in claim 12 , wherein the catheter tube further includes a tapered atraumatic distal tip region.

20. A catheter assembly, comprising:

an elongate catheter tube defining first and second lumens, wherein:

an outer surface of the catheter tube defines a flattened oval cross-sectional shape with opposing flat sides; and

the first and second lumens are separated by a septum and are substantially identically shaped, the first and second lumens each defining a cross-sectional shape including:

a minor arc portion adjacent the septum;

a major arc portion adjacent an outer wall of the catheter tube; and

rounded first and second corners interposed between the minor arc portion and the major arc portion.

21. The catheter assembly as defined in claim 20 , wherein the septum includes an hourglass cross-sectional shape.

22. The catheter assembly as defined in claim 20 , wherein the first and second lumens each cross-sectionally define a modified ellipse shape.

23. The catheter assembly as defined in claim 20 , wherein a cross-sectional thickness of the outer wall adjacent the major arc portion is substantially constant.

24. The catheter assembly as defined in claim 20 , wherein the catheter tube includes:

a first lateral opening in fluid communication with the first lumen, the first lateral opening defined by an angled cross cut; and

a second lateral opening in fluid communication with the second lumen, the second lateral opening defined by an angled cross cut.