Vascular needle

• US 6,921,387 B2
• Filed: 05/01/2002
• Issued: 07/26/2005
• Est. Priority Date: 05/01/2001
• Status: Expired due to Fees

• Current Assignee: Mayo Foundation For Medical Education And Research (Mayo Clinic)
• Original Assignee: Mayo Foundation For Medical Education And Research (Mayo Clinic)
• Inventors: Camrud, Allan R.
• Primary Examiner(s): Lucchesi, Nickolas D.
• Assistant Examiner(s): Han, Mark K.
• Application Number:
  US10/137,985
• Publication Number:
  US 20020177864A1
• Time in Patent Office: 1,182 Days
• Field of Search: 604/158, 604/164.01, 604/164.06, 604/187, 604/239, 604/264, 604/272, 604/273, 604/274
• US Class Current: 604/164.06
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150282 for piercing elements, e.g. blade, lancet, canula, needle
• CPC Class Codes: A61B 5/150396 Specific tip design, e.g. for improved penetration characteristics
• CPC Class Codes: A61B 5/150442 Blade-like piercing elements, e.g. blades, cutters, knives, for cutting the skin
• CPC Class Codes: A61B 5/150511 Details of construction of shaft
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/065 Guide needles
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

A hollow medical needle having a bevel face defining a needle tip and cutting surface that create a first incision. The needle additionally has a separate cutting blade extending outward from the needle. The blade is positioned adjacent the bevel face to create a second incision which intersects the first incision made by the bevel face cutting surface.

Claims

1. A needle assembly comprising:

a first needle portion comprising a hollow cylindrical member having a longitudinal axis and first and second ends, and a bevel face defined by the first end, the first needle portion being configured to make a first linear incision; and

a second needle portion comprising an elongate member having a longitudinal axis and first and second ends, and a cutting edge secured to the first end of the elongate member, the second needle portion being insertable into the first needle portion to position the cutting edge adjacent to the first end of the first needle portion, the second needle portion being configured to make a second linear incision that is not aligned with the first linear incision.

2. The needle assembly of claim 1 wherein the first and second linear incisions are aligned substantially perpendicularly to each other.

3. The needle assembly of claim 1 wherein the second end of each of the first and second needle portions comprise a hub portion, wherein the hub portions fix the position of the cutting edge relative to the bevel face.

4. The needle assembly of claim 1 wherein the cutting edge is a bevel blade.

5. A needle assembly comprising:

a first needle portion comprising a hollow cylindrical member having a longitudinal axis and first and second ends, and a bevel face formed in the first end, the bevel face being configured to make a first incision; and

a second needle portion comprising an elongate member baying a longitudinal axis and first and second ends, and a cutting edge coupled to the first end of the elongate member, the second needle portion being insertable into the first needle portion to position the cutting edge relative to the bevel face, the cutting edge being configured to make a second incision that intersects the first incision at an angle relative to the first incision.

6. The needle assembly of claim 5 wherein the cutting edge is configured to make the second incision at a plurality of angles relative to the first incision.

7. The needle assembly of claim 5 wherein the second end of each of the first and second needle portions comprise a hub portion, wherein the hub portions fix the position of the cutting edge relative to the bevel face.

8. The needle assembly of claim 5 wherein the cutting edge is a bevel blade.