Detection and quantification of intraperitoneal fluid using electrical impedance tomography

IEEE Transactions on Bio-medical Engineering
R Sadleir, R Fox

Abstract

A prototype electrical impedance tomography system was evaluated prior to its use for the detection of intraperitoneal bleeding, with the assistance of patients undergoing continuous ambulatory peritoneal dialysis (CAPD). The system was sensitive enough to detect small amounts of dialysis fluid appearing in subtractive images over short time periods. Uniform sensitivity to blood appearing anywhere within the abdominal cavity was produced using a post-reconstructive filter that corrected for changes in apparent resistivity of anomalies with their radial position. The image parameter used as an indication of fluid quantity, the resistivity index, varied approximately linearly with the quantity of fluid added. A test of the system's response to the introduction of conductive fluid out of the electrode plane (when a blood-equivalent fluid was added to the stomach) found that the sensitivity of the system was about half that observed in the electrode plane. Breathing artifacts were found to upset quantitative monitoring of intraperitoneal bleeding, but only on time scales short compared with the fluid administration rate. Longer term breathing changes, such as those due to variations in the functional residual capacity of the lungs,...Continue Reading

References

Nov 1, 1992·IEEE Transactions on Bio-medical Engineering·S LuoW J Tompkins
Jan 1, 1987·Clinical Physics and Physiological Measurement : an Official Journal of the Hospital Physicists' Association, Deutsche Gesellschaft Für Medizinische Physik and the European Federation of Organisations for Medical Physics·B H Brown, A D Seagar
Jan 1, 1995·Journal of Pediatric Gastroenterology and Nutrition·S NourR G Pearse
Jan 16, 1998·Journal of Medical Engineering & Technology·K BooneB Brown

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Citations

Jun 28, 2003·American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation·Fansan ZhuNathan W Levin
May 24, 2007·IEEE Transactions on Bio-medical Engineering·César A GonzálezBoris Rubinsky
Mar 13, 2008·IEEE Transactions on Bio-medical Engineering·Fusheng YouZheng Li
Aug 9, 2002·IEEE Transactions on Medical Imaging·Nick PolydoridesHugh McCann
Aug 21, 2014·Physiological Measurement·T SchlebuschM Walter
Feb 16, 2020·Medical & Biological Engineering & Computing·Li KeXiaodi Ding

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