Single-Handed, Reduced Vibration Lancing Device

• US 20090054920A1
• Filed: 03/09/2007
• Published: 02/26/2009
• Est. Priority Date: 03/15/2006
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Zhong, Weiping
• Granted Patent: US 8,021,383 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• 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 5/150809 by audible feedback
• CPC Class Codes: A61B 5/15111 Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
• CPC Class Codes: A61B 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit

Abstract

A lancing device includes a housing, at least two ramps, a lancet holder, a drive spring, and an activation mechanism. The housing includes first and second ends, and a first wall. The first end has an aperture extending therethrough and the first wall has an opening extending therethrough. The two ramps are located within the housing and forms a channel therebetween. The lancet holder is partially contained within the channel formed by the ramps and holds a lancet. The activation mechanism includes a user-accessible component and a plate spring. A portion of the user-accessible component extends through the opening and is external to the housing. The plate spring engages the ramps forming the channel and the lancet holder upon depression of the user-accessible component, the lancet holder moves towards the second end to a cocked position. Upon further depression of the user-accessible component, the lancet holder moves toward the first end to a puncture position.

Claims

1. A lancing device comprising:

a housing forming a central cavity including an aperture and an opening, the aperture including an axis aligned in a first direction and the opening includes an axis aligned in a second direction, the first direction being generally perpendicular to the second direction;

a lancet holder adapted to receive a lancet, the lancet holder being located within the central cavity formed by the housing, the lancet holder being adapted to maintain the lancet in a position generally aligned with the aperture, the lancet being adapted to at least partially extend through the aperture;

a drive spring attached to and connecting the lancet holder and the housing, the drive spring being attached to the lancet holder opposite the aperture; and

an activating mechanism including a user-accessible component and a plate spring, at least a portion of the user-accessible component extending through the opening and being external to the housing, the user-accessible component being adapted to be depressed in the second direction towards the housing, the plate spring being adapted to engage the lancet holder upon depression of the user-accessible component in the second direction,

wherein the depression of the user-accessible component in the second direction causes the plate spring to move the lancet holder away from the aperture in the first direction to a cocked position.

2. The lancing device of claim 1, wherein the lancet holder includes an extension in the direction opposite the aperture, the plate spring being adapted to engage the extension upon depression of the user-accessible component.

3. The lancing device of claim 2, wherein the extension includes an endpiece, the endpiece being adapted to at least partially inhibit disengagement of the plate spring from the extension as the user-accessible component is being depressed.

4. The lancing device of claim 1, wherein the plate spring is comprised of a generally flexible material.

5. The lancing device of claim 1, further comprising at least two ramps forming a channel generally aligned with the aperture, the lancet holder being located within the channel formed by the ramps.

6. The lancing device of claim 5, wherein the plate spring is adapted to engage the ramps.

7. The lancing device of claim 6, wherein further depression of the user-accessible component in the second direction causes the ramps to allow the lancet holder to move toward the aperture in the direction opposite the first direction to a puncture position.

8. The lancing device of claim 1, further comprising a pin located at least partially within the opening, the pin being adapted to associate with the activation mechanism, the activation mechanism being adapted to partially rotate around the pin upon depression of the user-accessible component.

9. A lancing device, comprising:

a housing including a first end, a second end, and a first wall, the first end being adjacent to the first wall, the second end being adjacent to the first wall opposite the first end, the first end having an aperture extending therethrough, the first wall having an opening extending therethrough;

at least two ramps located within the housing, the at least two ramps forming a channel therebetween generally aligned with the aperture;

a lancet holder partially contained within the channel formed by the at least two ramps, the lancet holder being adapted to hold a lancet in a position generally aligned with the aperture;

a drive spring attached to and connecting the lancet holder and the second end of the housing, the drive spring being attached to the lancet holder opposite the aperture; and

an activation mechanism including a user-accessible component and a plate spring, at least a portion of the user-accessible component extending through the opening and being external to the housing, the plate spring being substantially located within the housing, the plate spring being adapted to engage the at least two ramps forming the channel as well as the lancet holder upon depression of the user-accessible component in the direction of the housing,

wherein in response to depression of the user-accessible component, the lancet holder is adapted to move towards the second end to a cocked position and upon further depression of the user-accessible component, the lancet holder is adapted to move toward the first end to a puncture position.

10. The lancing device of claim 9, wherein the plate spring is adapted to act as a dampening mechanism after the lancet holder has moved to the puncture position.

11. The lancing device of claim 9, wherein the at least two ramps produce an audible sound as the lancet holder nears the cocked position.

12. The lancing device of claim 9, wherein the ramps generally trend towards the first wall as the distance from the first end increases.

13. The lancing device of claim 9, wherein the lancet holder includes an extension in the direction opposite the first end.

14. The lancing device of claim 13, wherein the extension includes an endpiece adapted to at least partially inhibit disengagement of the plate spring.

15. The lancing device of claim 9, wherein the at least two ramps at least partially assist in guiding the movement of the lancet holder.

16. The lancing device of claim 9, wherein the lancing device is adapted to be operated by a single user action with a single hand.

17. A method of using a lancing device comprising the acts of:

depressing an activation mechanism in a first direction, the activation mechanism including a user-accessible component and a plate spring;

moving a lancet holder in a second direction to a cocked position, the second direction being generally perpendicular to the first direction, the depression of the activation mechanism in the first direction causing the plate spring to engage the lancet holder; and

releasing the lancet holder, the release of the lancet holder allowing the lancet holder to move in a third direction to a puncture position, the third direction being opposite the second direction.

18. The method of claim 17, further comprising the act of dampening the lancet holder after the lancet holder has moved to the puncture position, the dampening being assisted by the contact of the plate spring with the lancet holder as the lancet holder returns from the puncture position.

19. The method of claim 17, further comprising the act of producing an audible sound as the lancet holder moves to the cocked position.

20. The method of claim 17, wherein the release of the lancet holder is facilitated by a plurality of ramps adapted to disengage the plate spring from the lancet holder.