The Operation of an Electrogastrograph
In relation on being an EKG Technician or even attending to EKG Technician Classes or EKG Technician training, the electrogastrographic or EGG examination can be considered a non – invasive method for investigating the propagation the slow waves in the stomach. The classic surface EGG signals are captured by six disposable electrodes, placed on the surface of patient’s stomach. During the signal registration process the standard protocol is applied according to the EGG Task Force recommendations.
The registration process usually includes a 30 – minute period before meal or what they call the pre – prandial period, a short meal period which is basically 5 – 10 minutes long for a standardized meal, and several 2 to 4 30 – minute periods after the meal or what they call the post – prandial periods. For more detailed analysis, each period is split into segments of 60 or 256 seconds length. The signals collected from the stomach surface include not only the EGG signal but also ECG signals that may be separated by proper band – pass filtration.

