Methods and apparatus for lancet actuation

• US 20070244499A1
• Filed: 06/18/2007
• Published: 10/18/2007
• Est. Priority Date: 04/19/2002
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Pelikan Technologies, Inc.
• Inventors: Boecker, Dirk, Alden, Don, Freeman, Dominique, Briggs, Barry
• Granted Patent: US 7,981,056 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150061 Means for enhancing collection
• CPC Class Codes: A61B 5/150099 by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
• CPC Class Codes: A61B 5/150152 by an adequate mechanical impact on the puncturing location
• CPC Class Codes: A61B 5/150167 Adjustable piercing speed of skin piercing element, e.g. blade, needle, lancet or canula, for example with varying spring force or pneumatic drive
• CPC Class Codes: A61B 5/150175 Adjustment of penetration depth
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• CPC Class Codes: A61B 5/150427 Specific tip design, e.g. for improved penetration characteristics
• 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 5/150572 Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• CPC Class Codes: A61B 5/15087 short range, e.g. between console and disposable using implanted devices A61B5/150877
• 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 5/15123 comprising magnets or solenoids
• 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 5/15153 Multiple piercing elements stocked in a single 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 5/15169 Characterized by a rolled strip
• 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 5/15174 : Piercing elements stocked in the form of a stack or pile
• CPC Class Codes: A61B 5/15176 : Stocking means comprising cap, cover, sheath or protection for aseptic stocking
• CPC Class Codes: A61B 5/15178 : Stocking means comprising separate compartments or units for new and for used piercing elements separate compartments for used piercing elements in piercing devices A61B5/15184
• CPC Class Codes: A61B 5/15184 : Piercing device comprising a separate compartment or unit for used piercing elements separate compartments for used piercing elements in stocking means A61B5/15178
• 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 5/157 : Devices characterised by integrated means for measuring characteristics of blood

Abstract

A lancet driver is provided wherein the driver exerts a driving force on a lancet during a lancing cycle and is used on a tissue site. The driver comprises of a drive force generator for advancing the lancet and a processor coupled to the drive force generator capable of changing the direction and magnitude of force exerted on the lancet during the lancing cycle. The driver further includes a human interface on the housing providing at least one output for communicating with the patient.

Claims

1. A method for actuating a bodily fluid extraction device, comprising:

providing a penetrating member device that includes at least one penetrating member and sue interface surface;

pushing down on at least a portion of the tissue interface surface with a body surface; and

applying pressure on at least a portion of the tissue interface surface.

2. The method of claim 1 further comprising:

compressing springs.

3. The method of claim 2, wherein the tissue interface surface is spring biased by the compressing springs creating an urging back on a finger and an increase in pressure.

4. The method of claim 3, wherein the increase in pressure increase a volume of bodily fluid expressed from a wound site at the finger.

5. The method of claim 1, wherein application of the pressure is application downward on at least a portion of the tissue interface surface.

6. The method of claim 1, wherein application of the pressure application urges a bodily fluid toward a target tissue site.

7. The method of claim 1, wherein the tissue interface surface sequentially increases an area of contact of a finger.

8. The method of claim 7, wherein the pressure is sequentially applied to the area of contact of the finger.

9. The method of claim 1, when as a user'"'"'s finger is urged downward the pressure is applied against the user'"'"'s finger across the tissue interface surface.

10. The method of claim 1, wherein as a user'"'"'s finger is further urged toward the contact surface, the area of contact and applied pressure increases due to compressing of springs.

11. The method of claim 1, wherein the contact surface and applied pressure serves to urge bodily fluid to flow to a wound tract of a user'"'"'s finger.

12. The method of claim 11, wherein the contact surface an applied pressure serve to promote subsequent expression of the bodily fluid from a target site on the user'"'"'s finger.

13. The method of claim 1, wherein body fluid from the wound site flows into a sample chamber.

14. The method of claim 1, further comprising:

using a display to view selected parameters relative to the body fluid.

15. The method of claim 1, wherein at least a portion of the tissue interface surface is moveable.

16. The method of claim 1, wherein application of pressure to the tissue interface surface enhances the flow of a body fluid from a wound site.

17. The method of claim 1, wherein spontaneous blood yield occurs and flows up a wound tract to a surface of the skin, where it can be collected and tested.

18. The method of claim 1, wherein the tissue interface surface includes an ergonomically contoured surface.

19. The method of claim 1, wherein at least a portion of the tissue interface surface is shaped to snugly fit a finger or other body portion.

20. The method of claim 1, wherein at least a portion of the tissue interface surface is contoured.

21. The method of claim 1, wherein at least a portion of the tissue interface surface includes a concave depression.

22. The method of claim 1, wherein at least a portion of the tissue interface surface conforms to a shape of a user'"'"'s finger.