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FOREIGN PATENT DOCUMENTS
WO WO 00 72899 12/2000
OTHER PUBLICATIONS
EPO Search Report for Application No. 05253303.1, dated Oct. 4, 2005.
* cited by examiner
Primary Examiner—Charles A. Marmor, II
Assistant Examiner—Christine D Hopkins
(74) Attorney, Agent, or Firm—Frost Brown Todd. LLC
(57) ABSTRACT
A remotely controlled gastric band system that is practically immune to external magnetic fields, such as from a Magnetic Resonance Imaging (MRI) machine, incorporates a bi-directional pump and fluid reservoir to adjust fluid volume in a gastric band. A piezoelectrically driven (e.g., rotary actuator, linear actuator) selectively compresses and expands a metal bellows hermetically sealed within a biocompatible and nonferromagnetic case such as titanium.
6 Claims, 10 Drawing Sheets
