Needle and catheter insertion device

Patent metadata

Field	Value
Publication number	US-12311128-B2
Application number	US-201816054552-A
Country	US
Kind code	B2
Filing date	Aug 3, 2018
Priority date	Aug 4, 2017
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A needle is provided that can be used for introducing or aspirating fluids to a patient or as an introducer needle for positioning and inserting a catheter, such as a peripheral IV catheter into a patient. The needle can be an introducer needle that extends from the distal end of the catheter during insertion. The needle has an insertion tip with a configuration to assist penetration into a vein with a reduced incidence of injuring the inner surface of the vein or inadvertently passing through side wall of the vein. The needle tip can be farmed with a curved distal end surface where the pointed tip is spaced radially inward relative to the outer surface of the needle. In another embodiment the needle tip can have a reverse beveled surface having an axial length, angle, and curvature to assist in penetrating the vein with a reduced incidence of transfixing the vein.

First claim

What is claimed is:

1. A needle comprising:
a body having a longitudinal dimension with a proximal end and a distal end; a lumen extending between said proximal end and said distal end, a first longitudinal side surface, a second longitudinal side surface opposite said first longitudinal side surface;
a first bevel surface extending at an angle of about 12-22° with respect to the longitudinal dimension from said first longitudinal side surface to said second longitudinal side surface to form a distal tip, a second reverse bevel surface and a third reverse bevel surface on a peripheral surface at said second longitudinal side surface and converging to said distal tip and said first bevel surface, said second reverse bevel surface and third reverse bevel surface being oriented relative to said first bevel surface to define a first cutting edge between said second reverse bevel surface and said first bevel surface, and a second cutting edge between said third reverse bevel surface and said first bevel surface, where a length of said first cutting edge between said second reverse bevel surface and said first bevel surface and a length of said second cutting edge between said third reverse bevel surface and said first bevel surface is about ⅓ to ½ a length of said first bevel surface, and said first cutting edge and said second cutting edge oriented at an angle of about 75-85° with respect to each other; and
a curved distal end surface at a distal end of said second longitudinal side surface of said body, said curved distal end surface extending from an outer peripheral surface of said second longitudinal side surface toward said distal tip of said body, and where said distal tip is oriented radially inward from said first and second longitudinal side surface, and said second reverse bevel surface and third reverse bevel surface converging to define a longitudinally extending distal cutting edge extending from said distal tip to said curved surface on said second longitudinal side surface of said body, said distal cutting edge oriented at an angle relative to the longitudinal dimension of said body, and wherein said curved distal end surface forms a continuous curvature with said distal cutting edge extending between said outer peripheral surface and said distal tip, and where said distal cutting edge faces radially outward from said curved distal end surface, and said distal cutting edge defined by said second reverse bevel surface and third reverse bevel surface has a curved profile and a distal end at said distal tip, and a ratio of a length of said distal cutting edge between said second reverse bevel surface and third reverse bevel surface to the axial length of said first bevel surface is 1:2.5 to 1:3.

2. The needle of claim 1 , wherein said second and third reverse bevel surfaces have a longitudinal length of one half of a longitudinal length of said first bevel surface.

3. The needle of claim 1 , wherein said lumen has an inner diameter not more than about ⅓ a radial dimension of an outer side wall of said body at said distal end.

4. The needle of claim 3 , wherein said lumen has an open distal end oriented between said distal tip and said first longitudinal surface of said cylindrical body.

5. The needle of claim 1 , wherein said distal tip and said distal cutting edge formed between said second and third bevel surfaces are spaced radially inwardly from said outer peripheral surface and radially inwardly from an inner surface of said lumen.

6. The needle of claim 1 , wherein a ratio of an axial length of said second reverse bevel surface and said third reverse bevel surface to an axial length of said first bevel surface is 1:1.5 to 1:1.8.

Assignees

• Becton Dickinson Co

Inventors

• Isaacson Shawn Ray
• Harding Weston Finch

Classifications

• A61M5/3286

  Needle tip design, e.g. for improved penetration · CPC title

• A61M25/0693

  Flashback chambers · CPC title

• A61M25/0618

  having means for protecting only the distal tip of the needle, e.g. a needle guard · CPC title

• A61M25/0606

  "Over-the-needle" catheter assemblies, e.g. I.V. catheters · CPC title

• A61B17/3415

  for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters (A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06) · CPC title