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Device for in vivo measurement of pressures and pressure variations in or on bones

  • US 20030139690A1
  • Filed: 12/03/2002
  • Published: 07/24/2003
  • Est. Priority Date: 01/07/2000
  • Status: Abandoned Application
First Claim
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1. Device for the in vivo measurement of pressures and pressure variations in or on a body, more particularly inside or outside bones or on dental implants, the device comprising an implantable probe and an evaluating unit, characterized in that the probe (1;

  • 33) comprises an oscillating circuit (L-C) including a pressure sensor (8, 30) and a coil (13), and the evaluating unit (3) comprises a resonance oscillating circuit (7) capable of detecting the natural frequency (Fe) of the oscillating circuit, the natural frequency (Fe) of the oscillating circuit (L-C) being determined by the momentary pressure acting on the pressure sensor (8), or variable according to variations of a dimension of the pressure sensor (8) caused by pressure variations, and capable of being detected, and the pressure sensor (8, 30) being in the form of a capacitor having a deformable membrane (9), spatially separated from the coil (13), and connected thereto by an electric conductor (15, 31, 35).

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