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Method for body fluid sample extraction

  • US 8,360,993 B2
  • Filed: 08/03/2011
  • Issued: 01/29/2013
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A method of sampling body fluid from a wound opening created in a skin surface at a sampling site, the method comprising:

  • providing an arrangement comprising a plurality of skin-penetration members and a plurality of pre-cocked torsional spring actuators, wherein each of the plurality of torsional spring actuators has a neutral rest position;

    automatically or manually initiating a testing sequence;

    actuating a first of the plurality of skin-penetration members with a respective torsional spring actuator such that the torsional spring actuator moves from a pre-cocked position to the neutral rest position and drives the skin-penetration member in an arcuate path into the surface of the skin thereby creating the wound opening;

    allowing the first skin-penetration member to obstruct the wound opening when the torsional spring actuator is in the neutral rest position; and

    transporting body fluid through an inner lumen of the first skin-penetration member.

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