Blood lancet with hygienic tip protection

• US 9,901,296 B2
• Filed: 10/17/2008
• Issued: 02/27/2018
• Est. Priority Date: 03/04/2000
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Inventors: Fritz, Michael, Argauer, Herbert, List, Hans, Weiss, Thomas, Deck, Frank, Immekus, Claudio
• Primary Examiner(s): BUI, VY Q
• Application Number:
  US12/253,702
• Publication Number:
  US 20090043325A1
• Time in Patent Office: 3,420 Days
• Field of Search: 606141, 606181
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/150572 Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• CPC Class Codes: A61B 5/150633 Protective sleeves which are axially extensible, e.g. sleeves connected to, or integrated in, the piercing or driving device; pivotable protective sleeves
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable
• CPC Class Codes: A61B 5/15151 Each piercing element being stocked in a separate isolated compartment
• CPC Class Codes: A61B 5/15165 Piercing elements stocked in or on a strip
• CPC Class Codes: A61B 5/15171 Characterized by propelling the piercing element perpendicular to the direction of movement of the strip
• CPC Class Codes: A61B 5/15176 Stocking means comprising cap, cover, sheath or protection for aseptic stocking
• CPC Class Codes: A61B 5/15186 Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use

Abstract

The invention concerns lancets with a lancet needle, the tip of the lancet needle being embedded in an elastic material. Furthermore the invention concerns lancets where the tip of the lancet needle is surrounded by a hollow body which partially consists of an elastic material that can be pierced by the tip of the lancet needle during the lancing process and which reseals the tip of the lancet needle in the hollow body when it is retracted. In addition the invention concerns a lancet magazine in which the lancets are accommodated in individual chambers, each chamber having an opening through which the tip of the lancet needle can pass, which is sealed by an elastic material. Finally the invention concerns the use of an elastic material as a component of a lancet or a lancet magazine to maintain the sterility of at least the tip of a lancet needle in the unused state and to hygienically protect at least the tip of a lancet needle in the used state.

Claims

1. Lancet containing

a lancet needle with a tip;

a lancet body which completely surrounds the lancet needle at least in the area of the tip, the tip being able to move relative to the lancet body and able to protrude from the lancet body and the lancet body consisting of an elastic material at least in the area of the tip of the lancet needle, characterized in that before its use, the tip of the lancet needle is embedded in the elastic material without a hollow space remaining, wherein the elastic material is a thermoplastic elastomer;

wherein the tip of the lancet needle has a first position in which the tip is embedded within the elastic material of the lancet body;

wherein the tip of the lancet needle has a second position in which the tip protrudes from the lancet body;

the tip of the lancet needle being moveable from the first position to the second position;

and a lancing device having a drive device engaging the lancet needle to move the tip of the lancet needle from the first position to the second position.

2. Lancet according to claim 1, characterized in that the elastic material is stabilized with a stiff material.

3. Lancet set comprising at least two lancets according to claim 1 which are connected together.

4. Lancet set according to claim 3, characterized in that the lancets are connected together by the elastic material.

5. Lancet according to claim 1, wherein the lancet needle is directly attached to the drive device.

6. Lancet according to claim 1, wherein the tip of the lancet needle pierces the elastic material and tissue when moving from the first position to the second position.

7. Lancet according to claim 1, further comprising:

the lancet body having a tissue facing surface configured to face tissue during lancing and a lancing device facing surface facing the lancing device;

wherein the tip of the lancet is located between the tissue facing surface and the lancing device facing surface when in the first position; and

wherein the tip of the lancet extends from the tissue facing surface when in the second position.

8. Lancet according to claim 7, further comprising:

the lancet needle having a drive end opposite the tip where the lancing device actuates the lancet needle; and

wherein a length of the lancet needle from the lancet body to the drive end is bare to allow the lancet needle to move relative to the lancet body when the tip of the lancet needle moves from the first position to the second position.

9. Lancet according to claim 8, wherein the drive end of the lancet needle is solely attached to the lancet body through the lancet needle.

10. Lancet according to claim 1, wherein the thermoplastic elastomer is based on styrene-ethylene-butylene-styrene polymers.

11. Lancet, comprising:

a lancet needle with a tip; and

a lancet body which completely surrounds the lancet needle at least in the area of the tip, the tip being able to move relative to the lancet body and able to protrude from the lancet body and the lancet body including an elastic material at least in the area of the tip of the lancet needle, characterized in that before its use, the tip of the lancet needle is embedded in the elastic material without a hollow space remaining, wherein the elastic material is an injection moldable material.

12. Lancet according to claim 11, further comprising:

the lancet needle having a drive end opposite the tip; and

wherein a length of the lancet needle from a lancet body to the drive end is bare to allow the lancet needle to move relative to the lancet body.

13. Lancet according to claim 12, wherein the drive end of the lancet needle is solely attached to the lancet body through the lancet needle.

14. Lancet according to claim 12, wherein the drive end of the lancet needle is dull.

15. Lancet according to claim 14, wherein the drive end of the lancet needle includes a head.

16. Lancet according to claim 11, wherein the injection moldable material includes a thermoplastic elastomer.