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Controlling pressure in adjustable restriction devices

  • US 8,034,065 B2
  • Filed: 02/26/2008
  • Issued: 10/11/2011
  • Est. Priority Date: 02/26/2008
  • Status: Active Grant
First Claim
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1. A method of forming a restriction in a patient, comprising:

  • implanting a gastric restriction device around a stomach to form a restriction that corresponds to a volume of fluid in the restriction device, and the restriction device receiving fluid from and delivering fluid to a fluid source at a flow rate defined by a geometry of a flow control mechanism in fluid communication with and disposed between the restriction device and the fluid source;

    adjusting the geometry of the flow control mechanism to adjust the flow rate;

    wherein the flow control mechanism includes a flexible tube disposed within an internal cavity of a housing body having exterior walls that are flexible;

    wherein adjusting a geometry of the flexible tube comprises modifying an amount of a second fluid within the internal cavity to deform the exterior walls of the housing body and to change a longitudinal length of the flexible tube.

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