Search PubMedSearch

PubMed · 8295437

Electrogastrogram simulation using a three-dimensional model.

Abstract

The recording of gastric electrical activity using cutaneous electrodes is known as electrogastrography, and the recorded electrogastrogram comprises the electrical control activity and the contraction-related electrical response activity. The electrogastrogram has been simulated using a three-dimensional model that takes the effect of inhomogeneities into consideration. The model reproduces the electrical control activity and the second component of the electrical response activity. Spike activity is not reproduced. The increase in amplitude towards the antrum and the phase coupling between various regions is reflected in the simulated electrogastrogram. There is a possibility of determining the velocity of propagation from the phase difference with electrodes located above the antrum.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

B Kothapalli. 1993. Electrogastrogram simulation using a three-dimensional model.. https://doi.org/10.1007/bf02441983

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Influence of nonionic surfactants on the potentiometric response of hydrogen ion-selective polymeric membrane electrodes.

The influence of poly(ethylene oxide)-based nonionic surfactants (i.e., Triton X-100 and Brij 35) in the sample phase on the response properties of hydrogen ion-selective polymeric membrane electrodes containing mobile (lipophilic amines) or covalently bound (aminated-poly-(vinyl chloride)) hydrogen ion carriers is reported. In the presence of these nonionic surfactants, membrane electrode response toward interfering cation activity (e.g., Na+) in the sample phase is increased substantially and the pH measuring range shortened. The degree of cation interference for pH measurements is shown to correlate with the basicity of the hydrogen ion carrier doped within the membrane phase. The observed deterioration in selectivity arises from the partitioning of the surfactant into the membrane and concomitant extraction of metal cations by the surfactants in the organic phase. The effect of nonionic surfactants on pH electrodes prepared with aminated-PVC membranes is shown to be more complex, with additional large shifts in EMF values apparently arising from multidentate interactions between the surfactant molecules and the polymeric amine in the membrane, leading to a change in the apparent pKa values for the amine sites. The effects induced by nonionic surfactants on the EMF response function of hydrogen ion-selective polymeric membrane electrodes are modeled, and experimental results are shown to correlate well with theoretical predictions.

Electrodes