Single-puncture lancing system

• US 8,940,006 B2
• Filed: 05/13/2013
• Issued: 01/27/2015
• Est. Priority Date: 06/30/2005
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Kheiri, Mohammad A., Zhong, Weiping, Ruan, Tieming
• Primary Examiner(s): Holwerda, Kathleen
• Assistant Examiner(s): SIMPSON, SARAH A
• Application Number:
  US13/893,159
• Publication Number:
  US 20130310867A1
• Time in Patent Office: 624 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, the lancing mechanism 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 configured to engage 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 plate located between the first portion and the second portion of the at least one spring, the first portion and second portion of the at least one spring being configured to engage and extend on opposite sides of the plate, the plate being distinct from the lancet holder and the shaft moving with respect to the plate when the lancing mechanism moves between the resting position, the cocking position, and the puncture position,

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 plate 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 plate is separate and distinct from a housing enclosing the lancing mechanism.

4. 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.

5. A lancing device, comprising:

a housing including a movable housing and a main housing, the 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 housing 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 configured to engage the lancet holder, the housing further enclosing a plate positioned between the first portion and the second portion of the at least one spring, the first portion and second portion of the at least one spring being configured to engage and extend on opposite sides of the plate, the plate being distinct from the lancet holder and the shaft moving with respect to the plate when the lancing mechanism moves between the resting position, the cocking position, and the puncture position, 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 movable housing forming an inner cavity enclosing a portion of the shaft of the lancing mechanism.

6. The lancing device of claim 5, wherein the plate is separate and distinct from the main housing enclosing the portion of the lancing mechanism.

7. The lancing device of claim 5, wherein the plate is separate and distinct from the movable housing.

8. The lancing device of claim 5, wherein the first portion of the at least one spring drives the plate in the direction of the lancet holder as the lancing mechanism moves from the cocking position to the puncture position.

9. The lancing device of claim 5, wherein the plate is separate and distinct from the housing.

10. The lancing device of claim 5, 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.