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Portable EGG recording system based on a digital voice recorder.

J-K Jang¹, M-J Shieh, T-S Kuo

¹Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan.

Journal of Medical Engineering & Technology

|April 3, 2009

Summary

A new portable electrogastrogram (EGG) system uses a digital voice recorder for non-invasive, long-term ambulatory gastrointestinal signal recording. This compact device enhances diagnosis of acute symptoms.

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Area of Science:

Biomedical Engineering
Gastroenterology
Medical Devices

Background:

Cutaneous electrogastrogram (EGG) recording provides a non-invasive method for gastrointestinal diagnosis.
Long-term ambulatory EGG recording is valuable for analyzing paroxysmal or acute gastrointestinal symptoms.

Purpose of the Study:

To design and develop a portable electrogastrogram (EGG) system for long-term ambulatory signal recording.
To create a compact and low-power EGG device utilizing a digital voice recorder (DVR).

Main Methods:

The system integrates electrodes, an EGG amplifier, a modulator, and a DVR.
A specialized timer circuit modulates EGG frequency for DVR compatibility.
Software handles online monitoring and off-line data acquisition, simplifying the system and reducing its size.

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Main Results:

The portable EGG system is robust, compact, and suitable for extended ambulatory monitoring.
Low supply voltage and low power consumption are achieved through design choices.
Software-based demodulation simplifies the system's complexity and reduces device size.

Conclusions:

The proposed portable EGG system, combined with a DVR, enables ambulatory EGG signal recording.
This technology offers a practical solution for long-term gastrointestinal monitoring outside clinical settings.
The compact and low-power design facilitates widespread use in research and clinical applications.