Lancet system

• US 6,616,616 B2
• Filed: 09/26/2001
• Issued: 09/09/2003
• Est. Priority Date: 09/26/2000
• Status: Expired due to Term

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Corporation (Roche Holding AG)
• Inventors: List, Hans, Fritz, Michael, Weiss, Thomas, Deck, Frank, Immekus, Claudio, Argauer, Herbert
• Primary Examiner(s): Hindenburg, Max F.
• Assistant Examiner(s): FOREMAN, JONATHAN M
• Application Number:
  US09/963,967
• Publication Number:
  US 20020120216A1
• Time in Patent Office: 713 Days
• Field of Search: 600/583, 606/181, 606/182, 606/183, 221/270, 221/271
• US Class Current: 600/583
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150106 Means for reducing pain or discomfort applied before puncturing; desensitising the skin at the location where body is to be pierced
• CPC Class Codes: A61B 5/150282 for piercing elements, e.g. blade, lancet, canula, needle
• CPC Class Codes: A61B 5/150427 Specific tip design, e.g. for improved penetration characteristics
• CPC Class Codes: A61B 5/150572 Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• CPC Class Codes: A61B 5/150633 Protective sleeves which are axially extensible, e.g. sleeves connected to, or integrated in, the piercing or driving device; pivotable protective sleeves
• CPC Class Codes: A61B 5/150702 fully automatically removed, i.e. the removing does not require any action by the user
• CPC Class Codes: A61B 5/15107 Piercing being assisted by a triggering mechanism
• CPC Class Codes: A61B 5/15146 Devices loaded with multiple lancets simultaneously, e.g. for serial firing without reloading, for example by use of stocking means. multiple simultaneous cutting or piercing A61B5/150977
• CPC Class Codes: A61B 5/15171 Characterized by propelling the piercing element perpendicular to the direction of movement of the strip
• CPC Class Codes: A61B 5/15176 Stocking means comprising cap, cover, sheath or protection for aseptic stocking
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes

Abstract

The invention concerns a lancet system comprising a plurality of essentially needle-shaped lancets, a drive unit which has a drive element which is moved from a resting position into a lancing position in order to carry out a lancing process, a storage area to store the lancets, a withdrawal area to guide at least the tip of the lancet out of the system during the lancing process and a transport unit which can transport lancets from the storage area into the withdrawal area, wherein the drive element is arranged in such a manner that in the withdrawal area it can act on the lancet located there to carry out a lancing process and thus move the lancet from a resting position into a lancing position and wherein the system has a retraction device in the withdrawal area which can interact with the lancet located in the withdrawal area in order to move the lancet after completion of the lancing process from the lancing position into the resting position and it concerns a lancet magazine adapted to the system, a corresponding lancing device and a working process for the system.

Claims

1. A system for storing and providing lancets for collecting body fluids comprising

i) a plurality of longitudinal, essentially needle-shaped lancets, each lancet having a tip;

ii) a storage area to store the lancets laterally adjacent to each other;

iii) a withdrawal area to guide at least the tip of one lancet out of the system during a lancing process;

iv) a transport unit for transporting the lancets from the storage area into the withdrawal area,

v) a drive unit including a drive element for moving a lancet in the withdrawal area from a resting position to a lancing position during the lancing process; and

vi) a retraction device separate from the drive unit and the transport unit, the retraction device being located in the withdrawal area for interaction with each lancet when located in the withdrawal area for automatically moving the lancet after completion of the lancing process from the lancing position back into the resting position.

2. A system as claimed in claim 1, wherein the lancet includes an end opposite to the tip having an element to be gripped by the retraction device.

3. A system as claimed in claim 1, wherein the retraction device contains a spring mechanism.

4. A system as claimed in any of claims 1-3, wherein the lancets are stored in a magazine.

5. A system as claimed in claim 4, wherein the magazine contains the retraction device.

6. A lancet for use in a system as claimed in claim 1 or 2 comprising a lancet needle and a lancet body partially surrounding the lancet needle.

7. A system according to claim 3 wherein the spring mechanism comprises a leaf spring.

8. A system according to claim 3 wherein the spring mechanism comprises a spiral spring.

9. A process for temporarily driving the tip of an essentially needle-shaped lancet out of a system for storing and providing lancets, the system including a drive element-, a transfer mechanism for moving the lancets from a storage position, and a retraction device that is separate from the drive element and from the transfer mechanism, the process comprising the steps of:

moving a lancet laterally from a storing position into a resting position,

driving the drive element for its resting position towards the lancet located in the resting position thereby propelling the lancet longitudinally from its resting position until it reaches its lancing position, and

subsequently automatically returning the lancet to its resting position with the aid of the separate retraction device.

10. The process as claimed in claim 9, wherein the returning step also moves the drive element towards its resting position.

11. A lancet magazine for storing lancets comprising

a storage area for storing a plurality of longitudinal, essentially needle-shaped lancets, the lancets being stored laterally side-by-side;

and

a withdrawal area wherein at least a tip of a lancet may be extended out of the magazine during a lancing process; and

a transport unit to transport the lancets from the storage area into the withdrawal area;

the withdrawal area also including an area for receiving a drive element for driving a lancet in the withdrawal area out of the magazine during a lancing process; and

an area for receiving a retraction device separate from the transport unit and the drive element for interaction with any lancet located in the withdrawal area to automatically move the lancet from a lancing position back into a resting position after the lancing process has been completed.

12. A lancet magazine as claimed in claim 11, wherein each lancet in the magazine includes an end opposite to the tip having an element that can be gripped by the retraction device.

13. A lancet magazine as claimed in claim 11, wherein the retraction device contains a spring mechanism.

14. A lancet magazine according to claim 13 wherein the spring mechanism comprises a leaf spring.

15. A lancet magazine according to claim 13 wherein the spring mechanism comprises a spiral spring.

16. A lancet magazine as claimed in any of claims 11, 12, or 13 wherein the transport unit comprises a gear to interact with the lancets in the magazine.

17. A lancet magazine as claimed in claim 16 wherein the transport unit further comprises a motor coupled to the gear.

18. A lancet magazine as claimed in claim 17 wherein the transport unit further comprises an energy supply coupled to the motor.

19. A lancing device suitable for use in a system for storing and providing lancets comprising

i) a storage area to store the lancets;

ii) a withdrawal area to guide at least a tip of each lancet out of the system during the lancing process;

iii) a transport unit to transport lancets from the storage area to a Testing position in the withdrawal area;

iv) a drive unit area having a drive element separate from the transport unit, the drive unit being movable to carry out a lancing process wherein a lancet in the withdrawal area moves from its resting position into a lancing position; and

v) a retraction device separate from the drive unit and the transport unit for interaction with any lancet located in the withdrawal area to automatically move the lancet, after completion of the lancing process, from its lancing position back into its resting position.