US2018271371A1PendingUtilityA1

Wireless interstitial fluid pressure sensor

48
Assignee: PURDUE RESEARCH FOUNDATIONPriority: Jun 15, 2013Filed: May 7, 2018Published: Sep 27, 2018
Est. expiryJun 15, 2033(~6.9 yrs left)· nominal 20-yr term from priority
Inventors:Babak ZiaieMarcus Anthony BrownTeimour Maleki-JafarabadiSeung Hyun Song
A61B 5/0031A61B 5/036
48
PatentIndex Score
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Claims

Abstract

An implantable pressure sensor arrangement is disclosed. The arrangement includes a substrate, a coil positioned on the substrate, a flexible membrane positioned 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 positioned 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.

Claims

exact text as granted — not AI-modified
1 . A system comprising:
 a fluid chamber over a coil;   a flexible membrane over the fluid chamber, wherein the flexible membrane is configured to be moveable with respect to the coil;   a conductive plate over the coil; and   a porous membrane over the flexible membrane, wherein the porous membrane is configured to transfer pressure onto the conductive plate, wherein an entirety of the porous membrane is over the flexible membrane.   
     
     
         2 . The system of  claim 1 , wherein the conductive plate is embedded in the flexible membrane. 
     
     
         3 . The system of  claim 2 , wherein the conductive plate is over the fluid chamber. 
     
     
         4 . The system of  claim 1 , wherein the conductive plate is ferromagnetic. 
     
     
         5 . The system of  claim 4 , wherein the conductive plate is a nickel-plated copper plate. 
     
     
         6 . The system of  claim 1 , wherein the coil is copper. 
     
     
         7 . The system of  claim 1 , further comprising the fluid chamber over a substrate, wherein the substrate is Polydimethylsiloxane. 
     
     
         8 . The system of  claim 1 , wherein the porous membrane is poly(ethylene terephthalate). 
     
     
         9 . The system of  claim 1 , wherein the fluid chamber comprises a compressible fluid. 
     
     
         10 . The system of  claim 9 , wherein the fluid chamber comprises air. 
     
     
         11 . The system of  claim 1 , wherein a thickness of the system is less than 1 millimeters (mm). 
     
     
         12 . The system of  claim 1 , wherein the system is configured to sense pressure in vivo. 
     
     
         13 . The system of  claim 1 , wherein the system is configured to sense pressure inside a tumor. 
     
     
         14 . A system comprising:
 a fluid chamber over a coil;   a flexible membrane over the fluid chamber, wherein the flexible membrane is configured to be moveable with respect to the coil;   a conductive plate over the fluid chamber; and   a porous membrane over the flexible membrane, wherein the porous membrane is configured to transfer pressure onto the conductive plate, wherein an entirety of the porous membrane is over the flexible membrane.   
     
     
         15 . A system comprising:
 a fluid chamber over a coil;   a flexible membrane over the fluid chamber, wherein the flexible membrane is configured to be moveable with respect to the coil;   a conductive plate embedded in the flexible membrane; and   a porous membrane over the flexible membrane, wherein the porous membrane is configured to transfer pressure onto the conductive plate, wherein the flexible membrane is configured to deflect towards and away from the coil, wherein an entirety of the porous membrane is over the flexible membrane.   
     
     
         16 . The system of  claim 15 , wherein the conductive plate is ferromagnetic. 
     
     
         17 . The system of  claim 15 , wherein the conductive plate is a nickel-plated copper plate. 
     
     
         18 . The system of  claim 15 , wherein the conductive plate is copper. 
     
     
         19 . The system of  claim 15 , wherein the porous membrane comprises poly(ethylene terephthalate). 
     
     
         20 . The system of  claim 15 , wherein the fluid chamber comprises a compressible fluid.

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