Polymeric hypodermic device

• US 4,838,877 A
• Filed: 12/19/1986
• Issued: 06/13/1989
• Est. Priority Date: 08/06/1985
• Status: Expired due to Fees

• Current Assignee: Bruce A. Massau
• Original Assignee: Bruce A. Massau
• Inventors: Massau, Bruce A.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Colosimo, Mark F.
• Application Number:
  US06/944,322
• Time in Patent Office: 907 Days
• Field of Search: 604/272-274, 604/95, 604/264
• US Class Current: 604/272
• CPC Class Codes: A61M 5/3286 Needle tip design, e.g. for improved penetration
• CPC Class Codes: A61M 5/3291 Shafts with additional lateral openings

Abstract

There is disclosed a polymeric hypodermic device that comprises a hollow polymeric needle for injection of substances beneath the skin. The polymeric hypodermic device is constructed of a polymeric material such as polyetheretherketones, polycarbonates, polyetherimides, polymethylpentenes, and other synthetic material having bio-compatibility and possessing sufficient structural strength in such fine structures so as to result in penetration of the skin and adjacent body tissues. The invention provides a novel injection end through which the medication is injected in a direction other than parallel to the axis of the needle, which has had a swirling motion imparted to it, thus lessening trauma to tissue and veins. In addition, said injection end is conical in shape with portals above a solid conical penetrating point, the outer surfaces of the device converge uninterruptedly forward from opposite sides of a tube to a needle sharp point, above said conical penetrating point two or more portals equally spaced along the outside diameter of the device are flush with the exterior of the outer surface of the device and wherein the side walls of the portal are configured so as to impart an angular momentum to the fluid to be injected. Another aspect of this invention is concerned with the use of such a unique polymeric needle for body fluid gathering that lessens the chances of arterial trauma and hemolysis.

Claims

1. An injection device comprising an injection end and constructed of a polymeric material, said injection end is of a ported configuration that delivers the material to be injected in a direction other than parallel with the axis of the device and said injection end is conical in shape with portals above a solid conical penetrating point:

the improvement comprising the outer surfaces of the device converging uninterruptedly forward from opposite sides of a tube to a needle sharp point wherein two or more portals equally spaced along the outside diameter of the device are flush with the exterior of the outer surface of the device and wherein the longitudinal side walls of the portal are configured at difference angles so as to impart an angular momentum or torque to the fluid to be injected.

2. The hypodermic injection device of claim 1 wherein the polymeric material is selected from the group consisting of:

-polycarbonates, polyesters, acrylates, polyaramides, polyamides, polyetheretherketones, modified phenylene oxides, polyetherimides, polymethylpentenes and polysulfones.

3. The hypodermic injection device of claim 1 wherein the conical penetrating point has an included angle of 10°

-22°

.

4. The hypodermic injection device of claim 1 wherein the conical penetrating point has an included angle of 12°

-18°

.

5. The hypodermic injection device of claim 1 wherein the portals are circular in shape.