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Electrochemical test strip with an integrated micro-needle and associated methods

  • US 7,144,495 B2
  • Filed: 08/23/2002
  • Issued: 12/05/2006
  • Est. Priority Date: 12/13/2000
  • Status: Expired due to Term
First Claim
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1. A method for detecting a change in the viscosity of a fluid sample, said method comprising:

  • (a) introducing a fluid sample into an electrochemical cell of an electrochemical test strip comprising oppositely spaced apart working and reference electrodes, wherein one of the working and reference electrodes includes an integrated micro-needle for obtaining the fluid sample from a user and a capillary channel for introducing the fluid sample from the micro-needle to the electrochemical cell;

    (b) applying an electric potential to said electrochemical cell to produce a steady state current between said oppositely spaced apart working and reference electrodes;

    (c) detecting a change in said steady state current; and

    (d) relating said change in steady state current to a change in viscosity of said fluid sample.

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