RESUMO
Investigation of Gastrointestinal tract (GIT) using multichannel intraluminal impedance technique (MII) is presented. The MII traces have large variations which correspond to the occurrence of certain activity that causes the impedance to change. A technique to detect the tract events from MII data is developed using wavelet transform. The resulting transformed signals are used to detect the occurrence of GIT events and to classify the events as swallow, reflux, or gas reflux. The technique is also used in estimating reflux event duration and the bolus velocity.
Assuntos
Impedância Elétrica , Esôfago/fisiopatologia , Refluxo Gastroesofágico/diagnóstico , Motilidade Gastrointestinal , Processamento de Sinais Assistido por Computador , Refluxo Gastroesofágico/fisiopatologia , Humanos , Valor Preditivo dos Testes , Sensibilidade e EspecificidadeRESUMO
A universal data header for computerized data transfer between different research centers has been developed and successfully tested. The structure of this data header allows for data interchange irrespective of the internal data representation of the processor used. The first 128 byte are used for description of data structure followed by dynamically allocated space for string variables, event data, and measured data. Test programs written in Turbopascal and C are available on floppy disk (formatted for MS-DOS or OS/9) from the authors upon request.
