Low pain penetrating member

• US 10,034,628 B2
• Filed: 12/20/2012
• Issued: 07/31/2018
• Est. Priority Date: 06/11/2003
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Inventors: Freeman, Dominique M., Alden, Don
• Primary Examiner(s): McDermott, Corrine
• Assistant Examiner(s): NGUYEN, TIN DUC
• Application Number:
  US13/721,604
• Publication Number:
  US 20130190578A1
• Time in Patent Office: 2,049 Days
• Field of Search: 606181, 606182, 606183, 604 57, 604272, 600576, 600583, 600309
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/150282 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 5/150511 Details of construction of shaft
• CPC Class Codes: A61B 5/15123 comprising magnets or solenoids
• CPC Class Codes: A61B 5/15151 Each piercing element being stocked in a separate isolated compartment
• CPC Class Codes: A61B 5/15161 Characterized by propelling the piercing element in a radial direction relative to the disc
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood
• CPC Class Codes: A61B 5/411 Detecting or monitoring allergy or intolerance reactions to an allergenic agent or substance

Abstract

Reducing the volume or drag on skin or sharpness of the penetrating member entering the wound during the cutting process will reduce the pain associated with lancing, and result in less power desired for retraction of the penetrating member from the skin. A variety of other penetrating member configuration as shown in the application.

Claims

1. A body fluid collection or fluid injection device through a skin, comprising:

a housing that includes a top housing and a bottom housing;

a plurality of penetrating members, each of the penetrating members configured for piercing tissue, wherein the plurality of penetrating members are made from a solid rod of a given diameter and geometry and are configured to reduce area of contact of the penetrating members with a penetrated material, each rod having a primary facet and two secondary side facets that extend from the primary facet and terminate in a penetrating tip;

a penetrating member driver configured to be coupled to each of the penetrating members, the penetrating member driver coupled to a processor with a retrograde withdrawal force controlled by the processor that is a penetrating member retraction phase imposed on the penetrating member by the penetrating member driver;

an active braking device having pads to control speed of each of the penetrating members;

a radial cartridge that contains the plurality of penetrating members, the radial cartridge being loaded into the device by opening the top housing that is hinged to the bottom housing;

a plurality of cavities in the radial cartridge;

a visual display coupled to the processor and configured to show measured analyte levels and other feedback to the user; and

a plurality of analyte sensors, each analyte sensor associated with one of the plurality of penetrating members, each analyte sensor positioned at one of the plurality of cavities.

2. The device of claim 1, wherein each of the penetrating members includes a splined cross-section and dimples impressed across a contact area of each penetrating member.

3. The device of claim 1, wherein each of the penetrating members has a cutting efficiency sufficient to bring at least 1 micro liter of blood to a skin surface after penetrating about 600 to 800 microns into the skin.

4. The device of claim 1, wherein each of the penetrating members has a cutting efficiency sufficient to bring at least 1 micro liter of blood to a skin surface after penetrating about 0.5 to 1.0 mm into the skin.

5. The device of claim 1, wherein each of the penetrating members comprises a shaft having a bar stock with a half-round cross section to reduce volume of each penetrating member.

6. The device of claim 1, wherein a portion of each of the penetrating members has a first cross-sectional volume and a second cross-sectional volume greater than the first cross-sectional volume for mechanical coupling with a driver to drive each penetrating member.

7. The device of claim 1, wherein a front end portion of each of the penetrating members has a smashed end configuration to reduce volume of each penetrating member inside the tissue.