Lancing apparatus for producing a puncture wound

• US 8,002,785 B2
• Filed: 03/02/2007
• Issued: 08/23/2011
• Est. Priority Date: 09/04/2004
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Inventors: Weiss, Thomas, Forster, Richard, Sachsenweger, Peter
• Primary Examiner(s): Manahan; Todd E
• Assistant Examiner(s): Tanner; Jocelin C
• Application Number:
  US11/681,371
• Publication Number:
  US 20070233167A1
• Time in Patent Office: 1,635 Days
• Field of Search: 606/181, 606/182, 606/183, 606/185, 606/186, 606/184, 600/583, 600/578, 206364-366, 227/175.1
• US Class Current: 606/181
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150175 Adjustment of penetration depth
• 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 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• 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 5/15151 Each piercing element being stocked in a separate isolated compartment
• CPC Class Codes: A61B 5/15163 Characterized by propelling the piercing element in an axial direction relative to the disc
• CPC Class Codes: A61B 5/15182 Means for keeping track or checking of the total number of piercing elements already used or the number of piercing elements still remaining in the stocking, e.g. by check window, counter, display

Abstract

A lancing apparatus for producing a puncture wound, comprising a magazine holder for a lancet magazine with a plurality of lancets. The lancet drive comprises a drive spring, a tensioning device for tensioning the drive spring and a push rod, the push rod being adapted for coupling to a lancet located in the lancet magazine and being adapted for moving at high velocity, together with a lancet coupled thereto, by means of lancet drive during a puncture and retraction movement to produce a puncture wound. A magazine advancing mechanism is provided for advancing the lancet magazine in such a manner that the lancets stored therein can be coupled to the push rod one after the other. According to exemplary embodiments, the lancet drive is not mechanically coupled to the magazine advancing mechanism whereby a plurality of puncture wounds can be produced using the same lancet a plurality of times. The lancing apparatus compromises an actuating element for actuating the magazine advancing mechanism independently from the lancet drive, in particular for actuating it independently from the tensioning device.

Claims

1. A lancing apparatus for producing a puncture wound, comprising:

a housing a magazine holder disposed in the housing and configured to hold a lancet magazine having a plurality of lancets;

a lancet drive comprising a drive spring, a tensioning device for tensioning the drive spring, and a push rod which couples to a lancet located in the lancet magazine and moves lancet in a puncture movement and a retraction movement the magazine holder being positioned in front of the lancet drive along the direction of the puncture movement;

a magazine advancing mechanism for advancing the lancet magazine; and

an actuating element configured to actuate the magazine advancing mechanism independently from the tensioning device;

wherein

the lancets stored in the magazine can be coupled to the push rod one after another;

the lancet drive is not coupled to the magazine advancing mechanism, whereby the same lancet coupled to the push rod can be driven by the lancet drive in the puncture and retraction movements several times to produce several puncture wounds without advancing the lancet magazine;

the magazine advancing mechanism is configured to advance the lancet magazine in only one direction; and

the magazine advancing mechanism comprises a rotation limitation device for restricting the rotation of the lancet magazine to less than 360°

.

2. The lancing apparatus of claim 1, wherein the actuating element is rotatable and the magazine advancing mechanism is actuated by rotating the actuating element.

3. The lancing apparatus of claim 1, wherein the lancet magazine is a revolver magazine.

4. The lancing apparatus of claim 3, wherein the magazine advancing mechanism comprises an axle which couples the actuating element to the lancet magazine.

5. The lancing apparatus of claim 4, wherein the magazine advancing mechanism comprises a unidirectional coupling located between the axle and the actuating element.

6. The lancing apparatus of claim 5, wherein the unidirectional coupling comprises a ratchet.

7. The lancing apparatus of claim 1, wherein the magazine advancing mechanism comprises a restoring spring adapted to be tensioned upon actuation of the magazine advancing mechanism.

8. The lancing apparatus of claim 1, further comprising a display for displaying usage status of the lancets of a lancet magazine inserted into the magazine holder.

9. The lancing apparatus of claim 8, wherein the display comprises a ring having markings on an exterior side thereof, each marking being assigned to a position of a lancet in the lancet magazine, wherein actuation of the magazine advancing mechanism turns the marking ring relative to a housing marking to align the housing marking with one of the markings of the marking ring.

10. The lancing apparatus of claim 9, wherein the ring has numeric markings and the numeric marking that is aligned with the housing marking after the turn corresponds to the number of unused lancets in the magazine.

11. The lancing apparatus of claim 1, wherein the actuating element has at least two independent actuation functions, the magazine advancing mechanism being actuated using a first actuation function and the tensioning device being actuated using a second actuation function of said actuating element.

12. The lancing apparatus of claim 11, wherein one of the two actuating functions is triggered by rotating the actuating element and the other of the two actuating functions is triggered by depressing the actuating element.

13. The lancing apparatus of claim 1, wherein the lancet drive comprises a drive rotor adapted to be driven by the drive spring and an output-side coupling mechanism, wherein, in a forward movement phase of the lancet drive, a rotational movement of the drive rotor is converted into a translational movement of the push rod and thereby into the puncture and retraction movement of the lancet.

14. The lancing apparatus of claim 1, wherein the tensioning device comprises a rotary-slide-transmission that cooperates with the actuating element such that the drive spring is tensioned when the actuating element is depressed.

15. The lancing apparatus of claim 1, wherein the magazine advancing mechanism comprises a transport limitation device which prevents movement of the lancet magazine beyond the lancet which is next in line upon actuation of the magazine advancing mechanism.

16. The lancing apparatus of claim 1, further comprising a blood sampling system.