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Method and apparatus for improving success rate of blood yield from a fingerstick

  • US 7,699,791 B2
  • Filed: 06/12/2002
  • Issued: 04/20/2010
  • Est. Priority Date: 06/12/2001
  • Status: Active Grant
First Claim
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1. A method for sampling blood comprising the steps of:

  • using an electronic driver to drive a penetrating member and lance a piece of skin to create an incision and a wound tract, the electronic driver being coupled to a processor and the processor being coupled to an amplifier; and

    using the amplifier to modulate power from a power supply to the electronic driver to provide a controlled slowed retraction of the penetrating member at a different velocity than a velocity of the penetrating member during creation of the incision, the slowed retraction of the penetrating member creating a bracing of the wound by keeping the tract from closing and keeping a flap created at a skin surface from sealing an opening at a top of the tract, wherein control during retraction of the penetrating member includes controlling velocity of the penetrating member based on penetrating member position using a mechanically predetermined path or an electrical position feedback mechanism.

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