LANCING DEVICES AND METHODS

• US 20090281459A1
• Filed: 05/05/2009
• Published: 11/12/2009
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: LifeScan Scotland Limited (Johnson & Johnson)
• Inventors: Faulkner, Allan James, Foley, Nicholas, Crosland, David Colin, Trickett, Paul, Young, Matthew James
• Granted Patent: US 8,454,533 B2
• Time in Patent Office: Days
• US Class Current: 600/583
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/15019 Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism mechanisms using distal end caps A61B5/150183, mechanisms at the piercing element carrier proximal end A61B5/150198
• 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 5/15109 Fully automatically triggered, i.e. the triggering does not require a deliberate action by the user, e.g. by contact with the patient's skin
• 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 5/15123 comprising magnets or solenoids
• CPC Class Codes: A61B 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• 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

Described and illustrated herein is an exemplary lancing device. The exemplary lancing device comprises: a first housing having spaced apart proximal and distal ends disposed along a longitudinal axis; a chassis disposed in the first housing in a fixed relationship with the first housing; a movable member disposed in the chassis and configured for movement along the longitudinal axis and in the first housing; a lancet coupled to the movable member; and a lancet depth adjustment member retained by both the first and chassis so that the lancet depth adjustment member is rotatable relative to both housings to provide for a plurality of stop surfaces to the movable member. Other embodiments and methods are also described.

Claims

1. A lancing device comprising:

a housing having spaced apart proximal and distal ends disposed along a longitudinal axis;

a movable member disposed in the housing and configured for movement along the longitudinal axis;

a collar partially disposed in the housing and coupled to the movable member so that the collar is movable as a unit with the movable member;

a lancet coupled to the collar;

a rotatable ring coupled to the collar; and

a lancet depth adjustment member retained by both the rotatable ring and the collar so that the lancet depth adjustment member is rotatable relative to the housing to provide for a plurality of stop surfaces for the collar as the collar moves along the longitudinal axis to the distal end.

2. The lancing device of claim 1, further comprising:

a chassis disposed in the housing, the chassis partially surrounding the movable member to provide a guide for movement of the movable member; and

a first bias member located in the chassis to bias the moveable member in a direction towards the distal end.

3. The lancing device of claim 2, in which the moveable member includes a plurality of arms extending away from the longitudinal axis towards the distal end, one of the plurality of arms configured to engage a boss formed on an internal surface of the housing to retain the moveable against the first bias member in a primed position.

4. The lancing device of claim 1, in which the housing comprises two halves connected together.

5. The lancing device of claim 1, in which the chassis comprises a unitary member connected to a positioning band coupled to the first housing, the chassis having at least one longitudinal groove that extends through the unitary member along the longitudinal axis to allow communication from the inside of the chassis to the inside of the first housing.

6. The lancing device of claim 1, further comprising a second bias member configured to bias the moveable member in a direction towards the proximal end.

7. The lancing device of claim 6, in which the moveable member comprises at least one return arm that extends through the longitudinal groove so that the moveable member is guided by the at least one return arm along a path defined by the longitudinal groove.

8. The lancing device of claim 7, in which the second bias member comprises a helical spring disposed outside the chassis and connected to the at least one return arm.

9. The lancing device of claim 4, in which the first bias member is selected from a group consisting of springs, magnets, or combinations thereof.

10. The lancing device of claim 7, further comprising a third bias member disposed in the housing to bias against the collar toward the distal direction along the longitudinal axis.

11. A lancing device comprising:

a first housing having spaced apart proximal and distal ends disposed along a longitudinal axis;

a second housing disposed in the first housing in a fixed relationship with the first housing;

a movable member disposed in the second housing and configured for movement along the longitudinal axis;

a bias member located in the second housing to bias the moveable member in a direction towards the distal end;

a lancet coupled to the movable member so that the lancet moves as a unit with the movable member along the longitudinal axis;

a depth adjustment member having a plurality of stop surfaces disposed radially about the longitudinal axis; and

a rotatable lock ring engaging an inner surface of the first housing and an inner surface of the depth adjustment member to retain the depth adjustment member to the first housing in one radial position of the rotatable lock ring and to allow release of the depth adjustment member in another radial position of the rotatable lock ring relative to the longitudinal axis.

12. The lancing device of claim 11, in which the depth adjustment member includes at least one locking finger extending generally along the longitudinal axis.

13. The lancing device of claim 11, in which the movable member includes at least one actuation arm that extends generally along the longitudinal axis and configured to engage a boss formed on an internal surface of the housing to retain the moveable against a first bias member in a primed position.

14. The lancing device of claim 11, further comprising a cylindrical collar disposed partially in the first housing and configured to surround a portion of the lancet, the cylindrical collar being in engagement with the moveable member.

15. The lancing device of claim 11, in which the first housing comprises two halves connected together.

16. The lancing device of claim 11, in which the second housing comprises a unitary member connected to a positioning band coupled to the first housing, the second housing having at least one longitudinal groove that extends through the unitary member along the longitudinal axis to allow communication from the inside of the second housing to the inside of the first housing.

17. The lancing device of claim 11, further comprising a second bias member configured to bias the moveable member in a direction towards the proximal end.

18. The lancing device of claim 16, in which the moveable member comprises at least one return arm that extends through the longitudinal groove so that the moveable member is guided by the at least one return arm along a path defined by the longitudinal groove.

19. The lancing device of claim 17, in which the second bias member comprises a helical spring disposed outside the chassis and connected to the at least one return arm.

20. The lancing device of claim 13, in which the first bias member is selected from a group consisting of springs, magnets, or combinations thereof.

21. A lancing device comprising:

a housing having spaced apart proximal and distal ends disposed along a longitudinal axis, the housing being devoid of any actuator or button on its outer surface;

a movable member disposed in the housing and configured for movement along the longitudinal axis;

a lancet coupled to the moveable member; and

a cap enclosing the lancet, the cap having a plurality of fingers that extend along the longitudinal axis to engage the moveable member and move the moveable member towards the proximal end against a bias force such that at a predetermined position along the longitudinal axis, the plurality of fingers disengage from the moveable member to allow the moveable member to move in an opposite direction toward the distal end, thereby allowing the lancet to extend through the cap.

22. A method of operating a lancing device having a housing with spaced apart distal and proximal ends disposed on a longitudinal axis, a moveable member having at least one arm extending along the longitudinal axis, the moveable member disposed for movement along the longitudinal axis in the housing, a collar being in contact with the moveable member, the collar configured to retain a lancet, and a cap having a plurality of fingers extending along the longitudinal axis into the housing, the method comprising:

pushing the at least one arm of the moveable member towards the proximal end against a bias member with the cap via at least one of the plurality of fingers of the cap with the lancet being disposed entirely within the cap; and

disengaging the at least one arm of the moveable member from the at least one of the plurality of fingers of the cap to allow the bias member to push the movable member with the lancet toward the distal end through an aperture defined by a wall of the cap to extend from the cap.

23. A method of operating a lancing device having a housing with spaced apart distal and proximal ends disposed on a longitudinal axis, a moveable member having at least one arm extending along the longitudinal axis, the moveable member disposed for movement along the longitudinal axis in the housing, a lancet member retained by the moveable member, and a cap having at least one extension portion extending along the longitudinal axis into the housing, the method comprising:

translating, with translation of the cap, the moveable member in a first direction along the longitudinal axis towards one of the ends of the housing; and

accelerating the moveable member in a second direction opposite the first direction to extend a lancet of the lancet member beyond a periphery of the cap.