Kim, AlbertPowell, Charles R.Ziaie, Babak2016-11-022016-11-022015-06Kim, A., Powell, C. R., & Ziaie, B. (2015, June). A generic packaging technique using fluidic isolation for low-drift implantable pressure sensors. In 2015 Transducers-2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS) (pp. 476-479). IEEE.https://hdl.handle.net/1805/11338This paper reports on a generic packaging method for reducing drift in implantable pressure sensors. The described technique uses fluidic isolation by encasing the pressure sensor in a liquid-filled medical-grade polyurethane balloon; thus, isolating it from surrounding aqueous environment that is the major source of baseline drift. In-vitro tests using commercial micromachined piezoresistive pressure sensors show an average baseline drift of 0.006 cmH2O/day (0.13 mmHg/month) for over 100 days of saline soak test, as compared to 0.101 cmH2O/day (2.23 mmHg/month) for a non-fluidic-isolated one soaked for 18 days. To our knowledge, this is the lowest reported drift for an implantable pressure sensor.en-USPublisher Policypressure sensorsensor packagingArticle