US 10,271,781 B2 · Plastic blood Lancet

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.

Claims4

Dependent claims

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.

Dependencies are inferred from the claim text.

Plastic blood Lancet

Life of this patent

Plastic blood Lancet

Life of this patent

Abstract

Claims4