Lancing Device

• US 20110118771A1
• Filed: 08/03/2006
• Published: 05/19/2011
• Est. Priority Date: 08/04/2005
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Hoover, Scott, Ruan, Tieming
• Granted Patent: US 8,617,195 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150152 by an adequate mechanical impact on the puncturing location
• CPC Class Codes: A61B 5/150183 Depth adjustment mechanism using end caps mounted at the distal end of the sampling device, i.e. the end-caps are adjustably positioned relative to the piercing device housing for example by rotating or screwing
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• 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 5/150824 by visual feedback
• CPC Class Codes: A61B 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• 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
• CPC Class Codes: A61B 5/15194 fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin

Abstract

A lancing mechanism is adapted to move between a resting, cocking and a puncture position. The lancing mechanism comprises a lancet holder adapted to receive a lancet, a shaft attached to the lancet holder, at least one drive spring and at least one damping spring. The drive spring surrounds at least a portion of the shaft and drives the lancing mechanism from the cocking position to the puncture position. The damping spring moves the lancing mechanism from the puncture position to the resting position. The drive spring is located at least partially within the damping spring.

Claims

1. A lancing mechanism adapted to move between a resting position, a cocking position, and a puncture position comprising:

a lancet holder adapted to receive a lancet;

a shaft attached to the lancet holder;

at least one drive spring surrounding at least a portion of the shaft, the at least one drive spring being adapted to drive the lancing mechanism from the cocking position to the puncture position;

at least one damping spring being adapted to move the lancing mechanism from the puncture position to the resting position, the at least one drive spring being located at least partially within the at least one damping spring.

2. The lancing mechanism of claim 1, wherein the at least one damping spring is two damping springs.

3. The lancing mechanism of claim 2, wherein the drive spring is located between the two damping springs.

4. The lancing mechanism of claim 1, wherein the drive spring is partially enclosed by the damping spring.

5. The lancing mechanism of claim 1, wherein a spring rate of the drive spring is greater than a spring rate of the damping spring.

6. A lancing mechanism adapted to move between a resting position, a cocking position, and a puncture position comprising:

a lancet holder adapted to receive a lancet;

a shaft attached to the lancet holder;

at least one damping spring surrounding at least a portion of the shaft, the at least one damping spring being adapted to move the lancing mechanism from the puncture position to the resting position;

at least one drive spring being adapted to drive the lancing mechanism from the cocking position to the puncture position, the at least one damping spring being located at least partially within the at least one drive spring.

7. The lancing device of claim 6, wherein the at least one drive spring is two drive springs.

8. The lancing device of claim 7, wherein a spring rate of each of the two drive springs is approximately the same as a spring rate of the at least one damping spring.

9. The lancing device of claim 8, wherein an overall spring rate of the two drive springs is substantially greater than the spring rate of the at least one damping spring.

10. The lancing device of claim 7, wherein the at least one damping spring is located between the two drive springs.

11. The lancing device of claim 6, wherein the at least one damping spring and the at least one drive spring are attached to the lancet holder.

12. A lancing device comprising:

a main housing including a spring stop, the main housing forming an inner cavity enclosing a portion of a lancing mechanism, the lancing mechanism including a lancet holder adapted to receive a lancet and a shaft attached to the lancet holder, the lancing mechanism further including at least one drive spring being detached from the spring stop, the at least one drive spring being adapted to drive the lancing mechanism from a cocking position to a puncture position, the lancing mechanism further including at least one damping spring being attached to the spring stop, the at least one damping spring being adapted to move the lancing mechanism from the puncture position to a resting position; and

a movable housing adjacent the main housing, the movable housing being adapted to move the lancing mechanism from the resting position to the cocking position.

13. The lancing device of claim 12, wherein the at least one drive spring at least partially surrounds the shaft of the lancing mechanism.

14. The lancing device of claim 13, wherein the at least one damping spring at least partially surrounds both the at least one drive spring and the shaft of the lancing mechanism.

15. The lancing device of claim 13, wherein the at least one drive spring is free-floating along the shaft of the lancing mechanism.

16. The lancing device of claim 12, wherein the lancing mechanism further includes a casing extending from the lancet holder and surrounding at least a portion of the shaft, the casing adapted to partially separate the at least one drive spring from the at least one damping spring.