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Updated: Nov 25, 2025
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Published on: August 17, 2022
TRANSCUTANEOUS MULTICHANNEL ELECTROGASTROGRAPHY: NORMAL PARAMETERS IN A BRAZILIAN POPULATION
Nayara Salgado Carvalho1,2, Diego Cardoso Baima1, Ricardo Correa Barbuti1
1Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), Divisão de Gastroenterologia e Hepatologia Clínica, São Paulo, SP, Brasil.
This study establishes normal electrogastrography (EGG) values for healthy Brazilians, providing a baseline for diagnosing gastric motility disorders. The findings support using multichannel EGG for future clinical assessments in this population.
Area of Science:
- Gastroenterology
- Physiology
- Medical Diagnostics
Background:
- Electrogastrography (EGG) assesses gastric myoelectrical activity noninvasively.
- Abnormalities in EGG correlate with conditions like gastroparesis and functional dyspepsia.
- No prior studies in Brazil have established normal multichannel EGG values in healthy individuals.
Purpose of the Study:
- To determine normal transcutaneous multichannel electrogastrography (EGG) values in a healthy Brazilian cohort.
- To establish a normative reference for gastric myoelectrical activity in Brazil.
Main Methods:
- A prospective study involving 20 healthy Brazilian individuals.
- Performed 30-minute preprandial and 30-minute postprandial EGG recordings after a 400 kcal meal.
- Analyzed dominant frequency (DF), %DF distribution, instability coefficient, and power ratio (PR).
Main Results:
- Mean DF ranged from 2.4-3.1 cpm (resting) and 2.6-3.2 cpm (postprandial).
- >70% DF in normogastria was observed in all participants.
- 19 out of 20 individuals showed a power ratio (PR) >1, indicating a normal response to the test meal.
Conclusions:
- Multichannel electrogastrography (EGG) is a viable tool for assessing gastric motility.
- The study provides essential normative data for the Brazilian population.
- Findings support the future application of multichannel EGG in diagnosing gastric motility disorders in Brazil.
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