Lancet-eject mechanism

• US 8,303,615 B2
• Filed: 03/12/2007
• Issued: 11/06/2012
• Est. Priority Date: 03/12/2007
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Purcell, D. Glenn
• Primary Examiner(s): Sonnett, Kathleen
• Assistant Examiner(s): WEBB, SARAH K
• Application Number:
  US12/530,654
• Publication Number:
  US 20100179579A1
• Time in Patent Office: 2,066 Days
• Field of Search: 606/181, 606/182
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/15113 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 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• 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 device comprises a main housing, a movable housing and a pushbutton. The main housing encloses a portion of a lancing mechanism. The lancing mechanism includes a lancet holder attached to a shaft. The lancet holder receives a lancet and has a slot formed therein. The lancing mechanism moves between a rest position, a cocked position, and a puncture position. The movable housing is adjacent to the main housing. The movable housing moves from a rest position to a cocking position and a lancet-release position. The pushbutton allows the lancing mechanism to move from the cocked position to the puncture position upon depression of the pushbutton. The pushbutton includes a lancet-release tab that extends into the slot formed in the lancet holder and engages the lancet. The lancet is released from the lancet holder in response to the continued depression of the pushbutton and the movable housing is moved from the rest position to the lancet-release position.

Claims

1. A lancing device comprising:

a main housing enclosing a portion of a lancing mechanism, the lancing mechanism including a lancet holder attached to a shaft, the lancet holder being adapted to receive a lancet and having a slot formed therein, the lancing mechanism being adapted to move between a rest position, a cocked position, and a puncture position;

a movable housing adjacent the main housing, the movable housing being adapted to move from a rest position to a cocking position and a lancet-release position; and

a pushbutton adapted to allow the lancing mechanism to move from the cocked position to the puncture position upon depression of the pushbutton in the general direction of the main housing, the pushbutton including a lancet-release tab formed thereon, the lancet-release tab being adapted to extend into the slot formed in the lancet holder and engage the lancet in response to the depression of the pushbutton,

wherein the lancet is released from the lancet holder in response to the continued depression of the pushbutton and the movable housing being moved from the rest position to the lancet-release position.

2. The lancing device of claim 1, wherein the pushbutton of the lancet-release mechanism includes a depression that assists a user in engaging the pushbutton.

3. The lancing device of claim 1, wherein the pushbutton of the lancet-release mechanism includes tactile features that assist a user in engaging the pushbutton.

4. The lancing device of claim 1, wherein the lancet-release tab does not engage the lancet until the movable housing is moved from the rest position to the lancet-release position.

5. The lancing device of claim 1, wherein the cocking position and the lancet-release position of the movable housing are substantially identical.

6. A method of releasing a lancet from a lancing device, the method comprising the acts of:

providing a lancing device including,

(i) a main housing enclosing a lancet holder being adapted to receive the lancet, the lancet holder having a slot formed therein,

(ii) a movable housing adjacent the main housing, the movable housing being adapted to move from a rest position to a cocking position and a lancet-release position, and

(iii) a pushbutton having a lancet-release tab formed thereon, the lancet-release tab being adapted to extend into the slot formed in the lancet holder and engage the lancet;

depressing the pushbutton in the general direction of the main housing resulting in the lancet-release tab entering the slot formed in the lancet holder; and

moving the movable housing from the rest position to the lancet-release position, while the pushbutton remains depressed, the moving of the movable housing causing the lancet-release tab to engage the lancet and cause the lancet to release from the lancet holder.

7. The method of claim 6, further comprising the act of removing the lancet from the lancet holder without a user touching the lancet.

8. The method of claim 6, wherein the pushbutton is also adapted to fire the lancing device.

9. The method of claim 8, wherein the pushbutton is utilized to release the lancet from the lancet holder.

10. The method of claim 6, wherein the cocking position and the lancet-release position of the movable housing are substantially identical.

11. A lancing device comprising:

a first housing enclosing at least a portion of a lancing mechanism, the lancing mechanism including a lancet holder configured to receive a lancet and having a slot formed therein, the lancing mechanism configured to move the lancet holder between a rest position, a cocked position, and a puncture position;

a movable housing adjacent the main housing, the movable housing configured to move from a rest position to a cocking position and a lancet-release position; and

a pushbutton configured to release the lancing mechanism thereby allowing the lancet holder to move from the cocked position to the puncture position, the pushbutton including a lancet-release tab formed thereon, the lancet-release tab configured to extend into the slot formed in the lancet holder in response to the depression of the pushbutton,

wherein the lancet is configured to release from the lancet holder in response to continued depression of the pushbutton and the movable housing being moved from the rest position to the lancet-release position.

12. The lancing device of claim 11, wherein the pushbutton of the lancet-release mechanism includes a depression configured to assist a user in engaging the pushbutton.

13. The lancing device of claim 11, wherein the pushbutton of the lancet-release mechanism includes tactile features configured to assist a user in engaging the pushbutton.

14. The lancing device of claim 11, wherein the lancet-release tab is configured to engage the lancet only upon the movable housing being moved from the rest position to the lancet-release position.

15. The lancing device of claim 11, wherein the cocking position and the lancet-release position of the movable housing are substantially identical.