Lancet

• US 8,652,159 B2
• Filed: 07/01/2010
• Issued: 02/18/2014
• Est. Priority Date: 07/29/2008
• Status: Active Grant

• Current Assignee: Facet Technologies LLC
• Original Assignee: Facet Technologies LLC
• Inventors: Trissel, John, Pusey, Lauren R., Ruf, Christopher J.
• Primary Examiner(s): McEvoy, Thomas
• Assistant Examiner(s): TANNER, JOCELIN C
• Application Number:
  US12/829,076
• Publication Number:
  US 20100280537A1
• Time in Patent Office: 1,328 Days
• Field of Search: 606181-185, 606/172, 606/167, 600/583, 600/573, 600/576, 600/574, 600/584, 600/578, 604/117
• US Class Current: 606/181
• 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 5/150412 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 5/150549 Protectors removed by rotational movement, e.g. torsion or screwing
• 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 5/150809 by audible feedback
• CPC Class Codes: A61B 5/150816 by tactile feedback, e.g. vibration
• 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

A lancet for use with a lancing device, the lancet having a body with releasable engagement features for engagement with a cooperating portion of a lancing device, a sharp needle, and a removable endcap. A coupling portion of the lancet has a non-circular profile. The endcap includes a receptacle for covering the sharp lancet tip after use, and a sheath portion with relief openings to reduce bending of the needle during manufacture or during removal of the endcap.

Claims

1. A lancet comprising:

a lancet body having a rear end defining a coupling portion for connection to a lancing device, the coupling portion comprising a pair of opposing longitudinal ribs and a pair of opposing longitudinal fins arranged in a generally cross-wise manner wherein at least one of the pair of longitudinal ribs and the pair of longitudinal fins taper inwardly along their defined longitudinal axes toward the rear end of the lancet body, whereby the coupling portion comprises a non-circular profile and at least one engagement feature for releasable engagement with a cooperating portion of the lancing device, and wherein the non-circular profile of the coupling portion of the lancet body has a width W and a thickness T defining an aspect ratio (W;

T) of about 3;

2 or greater;

a needle having a sharp tip portion extending axially from the lancet body opposite the rear end; and

an endcap removably secured to the lancet body and covering the sharp tip portion of the needle.

2. The lancet of claim 1, wherein the at least one engagement feature of the lancet body comprises at least one recess in the lancet body.

3. The lancet of claim 2, wherein the at least one engagement feature of the lancet body comprises an opposed pair of recesses in transverse sides of the lancet body.

4. The lancet of claim 1, wherein the endcap comprises a receptacle for enclosing the sharp tip portion of the needle after the lancet is used.

5. The lancet of claim 4, wherein the endcap has a proximal end and a distal end, the proximal end of the endcap being initially secured to the lancet body and covering the sharp tip portion of the needle, and the distal end of the endcap comprising the receptacle for enclosing the sharp tip portion of the needle after the lancet is used.

6. The lancet of claim 5, wherein the endcap has relief cutouts alongside a sheath adjacent its proximal end, the sheath initially surrounding the sharp tip portion of the needle.

7. The lancet of claim 1, wherein the lancet body and the needle have a combined mass of no more than 0.15 g.

8. The lancet of claim 1, wherein the lancet body and the needle have a combined length of about 16.5 mm.

9. The lancet of claim 1, wherein the lancet body has a length of about 13 mm.

10. The lancet of claim 1, in combination with a lancing device comprising the cooperating portion for releasable engagement with the lancet, the engagement feature of the lancet and the cooperating portion of the lancing device being complementary and unique to prevent use of the lancing device with other lancet types.

11. A lancet comprising:

a lancet body having a rear end defining a coupling portion for connection to a lancing device, the coupling portion comprising a pair of opposing longitudinal ribs and a pair of opposing longitudinal fins arranged in a generally cross-wise manner wherein the longitudinal ribs and fins taper inwardly along their defined longitudinal axes toward the rear end of the lancet body, whereby the coupling portion comprises a non-circular profile with a width W and a thickness T defining an aspect ratio (W;

T) of at least about 3;

2;

a needle having a sharp tip portion extending axially from the lancet body opposite the rear end; and

an endcap removably secured to the lancet body and covering the sharp tip portion of the needle.

12. The lancet of claim 11, wherein the coupling portion comprises an opposed pair of recesses directed inwardly into the lancet body.

13. The lancet of claim 12, wherein the inwardly directed recesses are generally V-shaped, having angularly inclined forward and rear contact faces.

14. The lancet of claim 11, wherein the endcap further comprises a receptacle having a depth sufficient to receive the sharp tip portion of the needle.

15. The lancet of claim 11, wherein the endcap has relief cutouts alongside a sheath portion into which the sharp tip portion of the needle is embedded.

16. The lancet of claim 11, wherein the lancet body and the needle have a combined mass of no more than 0.15 g.

17. The lancet of claim 11, wherein the lancet body and the needle have a combined length of about 16.5 mm.

18. The lancet of claim 11, wherein the lancet body has a length of about 13 mm.