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Vacuum assisted lancing system with elective vacuum release and method for blood extraction with minimal pain

  • US 9,770,201 B2
  • Filed: 02/19/2014
  • Issued: 09/26/2017
  • Est. Priority Date: 01/19/2010
  • Status: Active Grant
First Claim
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1. A vacuum assisted lancing system for blood extraction, comprising:

  • a tubular body having a central longitudinal axis, a lancing end and a longitudinally opposite second end;

    a lancing mechanism coupled with the body and including a lance coupler configured to removably couple with a lance;

    a vacuum mechanism coupled with the body and including a piston slideably coupled within the body and a biasing device configured to bias the piston toward the second end of the body, the body having a vacuum chamber between the piston and the lancing end of the body;

    a release mechanism configured to selectively hold the piston in at least one position relative to the body against a bias of the biasing device; and

    an opening through a wall of the body longitudinally between the piston and the lancing end of the body that allows fluid communication back and forth between an interior and exterior of the vacuum chamber;

    wherein at least one of the lancing mechanism, the vacuum mechanism, and a combination thereof, is configured to simultaneously move both the lance coupler and the piston in an initial direction toward the second end of the body upon release of the piston from the at least one position, and thereafter move the lance coupler in a second direction toward the lancing end of the body.

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