Wireless interstitial fluid pressure sensor

A system for a wireless implantable pressure sensor, comprising:

• an energization/interrogation arrangement configured to generate an energization signal and to receive and interrogate a response signal;
• and
• an implantable pressure sensor arrangement wirelessly coupled to the energization/interrogation arrangement, the implantable pressure sensor arrangement including:
• a substrate,
• a coil disposed on the substrate,
• a flexible membrane disposed proximate to the coil and configured to be moveable with respect to the coil, thereby forming a fluid chamber fluidly sealed from outside of the implantable pressure sensor arrangement,
• a porous membrane disposed on the flexible membrane and configured to transfer pressure from outside of the implantable pressure sensor arrangement onto the flexible membrane wherein a differential pressure is generated on the two sides of the flexible membrane thereby causing the flexible membrane to deflect towards and away from the coil, and
• an electrode coupled to the flexible membrane,
• the movement of the flexible membrane with respect to the coil configured to change resonant frequency of the implantable pressure sensor arrangement, the change readable by the energization/interrogation arrangement as a function of pressure existing outside of the implantable pressure sensor arrangement.