Device and method for variable speed lancet

• US 20070260271A1
• Filed: 03/16/2007
• Published: 11/08/2007
• Est. Priority Date: 04/19/2002
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Pelikan Technologies, Inc.
• Inventors: Boecker, Dirk, Freeman, Dominique
• Granted Patent: US 7,976,476 B2
• Time in Patent Office: Days
• US Class Current: 606/181
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/150427 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 5/15107 Piercing being assisted by a triggering mechanism
• CPC Class Codes: A61B 5/15123 comprising magnets or solenoids

Abstract

A method of penetrating tissue is provided. The method comprises using a lancet driver to advance a lancet into the tissue; advancing the lancet at a first desired velocity in a first layer of tissue; advancing the lancet at a second desired velocity in a second layer of tissue; and advancing the lancet at a third desired velocity in a third layer of tissue. In one embodiment, the method may including using a processor having logic for controlling velocity of the lancet in each layer of tissue.

Claims

1. A lancing system configured to drive a lancet during a lancing cycle and used on a tissue site, the system comprising:

a lancet driver; and

a processor coupled to said lancet driver, said processor configured to adjust lancet velocity to provide advancement of the lancet at a first desired velocity in a first layer of tissue, at a second desired velocity in a second layer of tissue, and at a third desired velocity in a third layer of tissue.

2. The system of claim 1 further comprising a user interface on said lancet driver allowing a user to adjust penetration depth based on stratum corneum hydration.

3. The system of claim 1 further comprising a user interface on said lancet driver allowing a user to adjust lancet velocity based on user pain.

4. The system of claim 1 further comprising memory for storing at least one of the following to determine a skin profile:

energy consumed per lancing event;

stratum corneum hydration;

time of day of stratum corneum hydration measurement.

5. The system of claim 1 wherein:

said processor has logic for using a lancet driver to advance a lancet into said tissue, said lancet having a lancet velocity equal to a first velocity in a first layer of tissue;

adjusting lancet velocity in the skin to achieve a desired velocity based on the layer of tissue through which the lancet is cutting to provide advancement of the lancet at a first desired velocity in a first layer of tissue, at a second desired velocity in a second layer of tissue, and at a third desired velocity in a third layer of tissue.

6. A lancing system configured to drive a lancet during a lancing cycle and used on a tissue site, the system comprising:

a drive force generator coupled to an energy sensor sufficient for measuring energy used to drive said lancet into the tissue site;

a processor on said lancet driver, said processor calculating lancet velocity and sending signals to said drive force generator to adjust lancet velocity based at least in part on characteristics of tissue being cut by the lancet, the processor providing advancement of the lancet at a first desired velocity in a first layer of tissue, at a second desired velocity in a second layer of tissue, and at a third desired velocity in a third layer of tissue.

7. The system of claim 6 further comprising memory for storing advancing said lancet at a first desired velocity in a first layer of tissue;

advancing said lancet at a second desired velocity in a second layer of tissue; and

advancing said lancet at a third desired velocity in a third layer of tissue.

8. A lancing system configured to drive a lancet during a lancing cycle and used on a tissue site, the system comprising:

a drive force generator;

a controller with logic for controlling the drive force generator to advance a penetrating member along a penetration path into said tissue, said penetrating member having a penetrating member velocity equal to a first velocity in a first layer of tissue;

wherein said controller has logic for determining penetrating member velocity at a plurality of locations along said penetration path; and

wherein said controller has logic for adjusting penetrating member velocity at a plurality of locations along said penetration path prior to the penetrating member coming to a stop in said tissue to provide advancement of the lancet at a first desired velocity in a first layer of tissue, at a second desired velocity in a second layer of tissue, and at a third desired velocity in a third layer of tissue.