title: An Implantable Wireless Interstitial Pressure Sensor With Integrated Guyton Chamber: in vivo Study in Solid Tumors.
abstract: A wireless implantable interstitial fluid pressure (IFP) sensor with an integrated Guyton chamber is presented. This implantable device enables noninvasive and continuous measurements of IFP. The Guyton chamber allows for an accurate measurement of IFP without the interference from various cellular/tissue components. The sensor consists of a coil, an air chamber, a silicone membrane embedded with a nickel plate, and a Guyton chamber. The fabricated device is 3 mm in diameter and 1 mm in thickness. The sensor shows a linear response to the pressure with a sensitivity of 60 kHz/mmHg and a resolution of 1 mmHg. Experiments in human prostate cancer tumors grown in mice confirm the sensor's capability to operate in vivo and provide continuous wireless measurement of IFP, a surrogate parameter indicating the "window of opportunity" for delivering chemo- and radio-therapeutic agents.
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Song
authors.forename: Albert
authors.initials: A
authors.lastname: Kim
authors.forename: Marcus
authors.initials: M
authors.lastname: Brown
authors.forename: Chaeyong
authors.initials: C
authors.lastname: Jung
authors.forename: S
authors.initials: S
authors.lastname: Ko
authors.forename: Babak
authors.initials: B
authors.lastname: Ziaie
mesh_terms: D020533:Angiogenesis Inhibitors / Q000494:pharmacology; D000818:Animals; D060833:Cellular Microenvironment / Q000187:drug effects / Q000502:physiology*; D004867:Equipment Design; D045604:Extracellular Fluid / Q000502:physiology*; D051379:Mice; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D009369:Neoplasms / Q000098:blood supply*; D011312:Pressure; D019736:Prostheses and Implants; D059015:Wireless Technology / Q000295:instrumentation*
chemical_list: D020533:Angiogenesis Inhibitors