Plastic blood Lancet

• US 10,271,781 B2
• Filed: 11/05/2012
• Issued: 04/30/2019
• Est. Priority Date: 11/05/2012
• Status: Active Grant

• Current Assignee: Lim, Chee Yen
• Original Assignee: Lim, Chee Yen
• Inventors: Lim, Chee Yen
• Primary Examiner(s): Hindenburg, Max
• Application Number:
  US14/437,283
• Publication Number:
  US 20150265198A1
• Time in Patent Office: 2,367 Days
• 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 5/150297 for piercing devices, i.e. devices ready to be used for lancing or piercing for piercing elements A61B5/150282, for driving devices A61B5/15029
• CPC Class Codes: A61B 5/150312 Sterilisation of piercing elements, piercing devices or sampling devices piercing element stocking means, e.g. cartridges, A61B5/15176
• CPC Class Codes: A61B 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150564 Protectors removed by pulling or pushing
• CPC Class Codes: A61B 5/150618 Integrally moulded protectors, e.g. protectors simultaneously moulded together with a further component, e.g. a hub, of the piercing element
• CPC Class Codes: A61B 5/150717 manually removed
• CPC Class Codes: A61B 5/15101 Details
• CPC Class Codes: A61B 5/15105 Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable

Abstract

The present invention provides a surgically invasive pointed article for skin penetration and capillary whole blood extraction whose penetration ability can be disabled after use by deforming the tips. The present invention is made by injection molding a plastic needle 35 having an anchoring means 45 using a first material, followed by another injection molding process to over-mold a first body segment 20 and second body segment 30 using a second material to encase the plastic needle 35 thereby anchoring the plastic needle 35 to prevent further movement of the plastic needle 35. The encasing of the second material provide a barrier isolating the plastic needle 35 from the ambient to protect the tips 50 from damage and once sterilized, to conserve the sterile conditions till point of use. The barrier formed by a second over-molding process comprises a detachable cap 20 and a body 30. The present invention is normally used for blood sampling applications but can also be used for applications such as vaccination or skin allergy testing, and transdermal/intradermal drug delivery.

Claims

1. A plastic blood lancet comprising:

a) a first body segment, and

b) a second body segment, both the first and second body segments being made from a second material at the same time, and which has a melting temperature that is lower than the glass transition temperature of a first material, and which does not form covalent bonding or have a chemical reaction with the first material,

c) a plastic needle covered by the first body segment and made from the first material that has a glass transition temperature, the-plastic needle further comprising i) a hole portion disposed proximate to a first end of the plastic needle for anchoring the plastic needle onto the second body segment, ii) a rectangular section disposed between the hole portion and a needle tip for providing a sliding means for the first body segment to be pulled, and for preventing the first body segment to be twisted, iii) a needle tip having an apex at a distal end, the apex having a taper angle that is much larger than a taper angle of the needle tip, the apex being disposed proximate a second end of the plastic needle, the second body portion being overmoulded on the plastic needle.

2. A plastic blood lancet as in claim 1, wherein the first material comprises poly-ether-imide (PEI).

3. A plastic blood lancet as in claim 1, wherein the second material comprises poly-ethelene (HDPE).

4. A plastic blood lancet as in claim 1, wherein the first body segment can be removed to expose the plastic needle by pulling linearly away from the second body segment.