Single-puncture lancing system

• US 8,460,329 B2
• Filed: 06/29/2006
• Issued: 06/11/2013
• Est. Priority Date: 06/30/2005
• Status: Expired due to Fees

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Kheiri, Mohammad, Zhong, Weiping, Ruan, Tieming
• Primary Examiner(s): Hughes, S. Thomas
• Assistant Examiner(s): SIMPSON, SARAH A
• Application Number:
  US11/921,987
• Publication Number:
  US 20100217300A1
• Time in Patent Office: 2,539 Days
• Field of Search: 606/182, 606/181
• US Class Current: 606/182
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• 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 5/15186 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
• 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 resting, cocking and puncture positions and comprises a lancet holder, a shaft, at least one spring and a mass. The shaft is attached to the lancet holder and has an enlarged end opposite the lancet holder. The spring surrounds at least a portion of the shaft and has first and second portions. The second portion of the spring is attached to the lancet holder. The spring drives the lancing mechanism between the cocking and puncture positions. The mass is located along the spring with the first and second portions of the spring extending on opposite sides of the mass. The mass is distinct from the lancet holder. The first portion dampens the lancing mechanism when moving from the puncture position to the resting position.

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 affixed to the lancet holder, the shaft having an enlarged end opposite the lancet holder;

at least one spring surrounding at least a portion of the shaft, the at least one spring having a first portion and a second portion, the second portion of the at least one spring being attached to the lancet holder, the at least one spring being adapted to drive the lancing mechanism between the cocking position and the puncture position; and

a mass located along the at least one spring, the first portion and second portion of the at least one spring being affixed to and extending on opposite sides of the mass, the mass being distinct from the lancet holder and being moveable with respect to the shaft,

wherein the first portion of the at least one spring dampens the lancing mechanism as the lancing mechanism moves from the puncture position to the resting position.

2. The lancing mechanism of claim 1, wherein the first portion of the at least one spring drives the mass in the direction of the lancet holder as the lancing mechanism moves from the cocking position to the puncture position.

3. The lancing mechanism of claim 1, wherein the mass is a plate.

4. The lancing mechanism of claim 3, wherein the plate contacts at least one stop feature as the lancing mechanism moves from the cocked position to the puncture position.

5. The lancing mechanism of claim 1, wherein the first portion of the at least one spring is a first spring and the second portion of the at least one spring is a second spring.

6. The lancing mechanism of claim 1, wherein the mass is moveable along an axis of the shaft.

7. A lancing device comprising:

a movable housing; and

a main housing forming an inner cavity enclosing a portion of a lancing mechanism, the lancing mechanism being adapted to move between a resting position, a cocking position, and a puncture position, the lancing mechanism including a lancet holder affixed to a shaft having an enlarged end opposite the lancet holder, the main housing further enclosing at least one spring surrounding at least a portion of the shaft, the at least one spring having a first portion and a second portion, the second portion of the at least one spring being affixed to the lancet holder, the main housing further enclosing a mass located along the at least one spring, the first portion and second portion of the at least one spring extending on opposite sides of the mass, the mass being distinct from the lancet holder and from the movable housing and being slidably coupled to the shaft, the at least one spring being adapted to drive the lancing mechanism between the cocking position and the puncture position, the first portion of the at least one spring damping the lancing mechanism as the lancing mechanism moves from the puncture position to the resting position,

wherein the movable housing is adjacent to the main housing, the movable housing being adapted to move from a resting position to a cocking position, the moveable housing forming an inner cavity enclosing a portion of the shaft of the lancing mechanism.

8. The lancing device of claim 7 wherein the mass is a plate.

9. The lancing device of claim 8, wherein the plate contacts at least one stop feature formed on the main housing, the plate contacting the at least one stop feature as the lancing mechanism moves from the cocked position to the puncture position.

10. The lancing device of claim 7, wherein the mass of the mass is less than the mass of the lancet holder.

11. The lancing device of claim 7, wherein the first portion of the at least one spring dampens the lancing mechanism.

12. The lancing device of claim 7, wherein the mass is formed along the at least one spring by a molding process.

13. The lancing device of claim 7, wherein the mass is slidable along an axis of the shaft.

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

a lancet holder directly coupled to a lancet;

a shaft attached to the lancet holder, the shaft having an enlarged end opposite the lancet holder;

a first spring surrounding at least a portion of the shaft, the first spring being attached to the lancet holder, the first spring being adapted to drive the lancing mechanism between the cocking position and the puncture position;

a second spring having a first end and a second end, the second spring being located within the lancet holder, the first end of the spring being attached to the lancet holder; and

a mass attached only to the second end of the second spring, the mass being located within and distinct from the lancet holder,

wherein the second spring is at least partially compressed as the lancing mechanism moves from the cocked position to the puncture position.

15. The lancing device of claim 14, wherein the second spring at least partially decompresses as the lancing mechanism moves from the puncture position to the resting position.

16. The lancing device of claim 15, wherein the second spring recompresses as the first spring secondarily decompresses.

17. The lancing device of claim 16, wherein the recompression of the second spring and the mass dampens the lancing mechanism.

18. The lancing mechanism of claim 14, wherein the mass is moveable with respect to the shaft.

19. The lancing mechanism of claim 14, wherein the mass is moveable with respect to the lancet holder and the lancet.