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Measuring a gradient in-vivo

  • US 7,245,954 B2
  • Filed: 03/25/2004
  • Issued: 07/17/2007
  • Est. Priority Date: 03/27/2003
  • Status: Expired due to Fees
First Claim
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1. A method for determining a direction of flow through a gastrointestinal tract, the method comprising:

  • inserting first and second pH sensors within the gastrointestinal tract, the first and second pH sensors separated by a distance D;

    sampling an output of the first and second pH sensors over time;

    determining a gradient between the output of the first and second pH sensors over time; and

    determining the direction of flow over the distance D based on the gradient.

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