Title :
New method of analysis of epigastric impedance measurement for assessment of gastric emptying and motility
Author :
Chitsakul, Kittipol ; Bouchoucha, Mouloud ; Lee, Jae W.
Author_Institution :
Hopital Laennec, Paris
Abstract :
Epigastric impedance changes for a stomach filled with 10%-glucose water were observed by passing a 100-kHz current through surface electrodes on the upper abdomen; a recording was obtained by two other electrodes. The characteristics of epigastric impedance changes are presented in terms of a predictive model. The gastric emptying curve was fitted numerically by a Weibull´s model based on the Gauss-Newton algorithm programmed on a microcomputer. The inferior envelope for the noisy curve was separated for clear representation. A running spectrum analysis was used to determine the regular gastric activity and its variation. The numerical analysis in time domain gives a clear representation of the gastric emptying rate and some other parameters which can be used statistically in further clinical investigation and treatment
Keywords :
bioelectric phenomena; biomedical measurement; curve fitting; electric impedance measurement; medical computing; 100 kHz; Gauss-Newton algorithm; Weibull´s model; epigastric impedance measurement; gastric activity; gastric emptying curve; microcomputer; noisy curve; numerical analysis; predictive model; running spectrum analysis; surface electrodes; Abdomen; Electrodes; Impedance measurement; Least squares methods; Microcomputers; Newton method; Predictive models; Recursive estimation; Stomach; Surface impedance;
Conference_Titel :
Computer-Based Medical Systems, 1991. Proceedings of the Fourth Annual IEEE Symposium
Conference_Location :
Baltimore, MD
Print_ISBN :
0-8186-2164-8
DOI :
10.1109/CBMS.1991.128937
