Apparatus and method for using a needle in an intravascular assembly

• US 6,280,424 B1
• Filed: 12/21/1999
• Issued: 08/28/2001
• Est. Priority Date: 12/21/1999
• Status: Expired due to Term

• Current Assignee: Medex Incorporated (Smiths Group International Holdings Ltd.)
• Original Assignee: Ethicon Incorporated (Johnson & Johnson)
• Inventors: Vincenzo, Daniel M., Solomon, Donald D., Chang, Joseph J.
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US09/469,740
• Time in Patent Office: 616 Days
• Field of Search: 604/272, 604/274, 604/264, 604/164, 604/273, 604/170
• US Class Current: 604/272
• CPC Class Codes: A61M 25/06 Body-piercing guide needles or the like
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters

Abstract

An apparatus and method is disclosed in which an intravascular device allows blood to flow into a plurality of apertures longitudinally located in a portion of the needle.

Claims

1. A catheter unit comprising:

a housing;

a needle coupled to the housing, the needle having a plurality of apertures located longitudinally along a cannula of the needle; and

wherein the apertures are radially biased in an approximate range of 30 to 50 degrees.

2. The catheter unit of claim 1, wherein at least one of the apertures is substantially circular in shape.

3. The catheter unit of claim 1, wherein at least one aperture is approximately in the range of 0.025 to 0.300 inches distance from another aperture.

4. The catheter unit of claim 1, wherein a first aperture is approximately 0.25 inches from a second aperture.

5. The catheter unit of claim 1, wherein the apertures are substantially evenly spaced longitudinally.

6. The catheter unit of claim 1, wherein a radius of the aperture ranges from 0.005″

to 0.060″

.

7. A catheter comprising:

a housing; and

a needle coupled to the housing, the needle having a plurality of holes longitudinally placed in a cannula of the needle;

wherein the plurality of holes are radially biased in a range of about 30 to 50 degrees.

8. The catheter of claim 7 wherein a first hole is radially biased from a second hole approximately in the range of 30 to 50 degrees.

9. The catheter of claim 7 wherein the holes are substantially evenly spaced longitudinally.

10. A catheter device comprising:

a housing which transitions into a tube;

a needle secured to the housing, the needle having a plurality of apertures located longitudinally along a cannula of the needle; and

the apertures are radially biased about 30 to 50 degrees.

11. The catheter device of claim 10, wherein the apertures are radially biased from 30 to 50 degrees.