Electrogastrogram

Electrogastrogram (EGG) can detect abnormal gastric electrical rhythm and is a clinically valuable method of examination. Under normal circumstances, the main power ratio of gastric power after meals and before meals is greater than 1. Otherwise, it suggests that the gastric motility is low after the meal, or there is excessive expansion of the stomach in the case of fasting, and the stomach cannot be further expanded after the meal. When the antral motility is low, gastric tachycardia (greater than 4 weeks/min) or gastric hyperactivity (less than 2 weeks/min) can also be seen. Basic Information Specialist classification: Digestive examination classification: neuroelectrophysiology Applicable gender: whether men and women apply fasting: fasting Tips: Check in the early morning after fasting overnight. Normal value Under normal circumstances, the main power ratio of gastric power after meals and before meals is greater than 1. The main frequency of normal gastric electricity is 2 to 4 weeks/minute, and should be more than 75% after meals. Clinical significance Abnormal results: Under normal circumstances, the main power ratio of gastric power after meals and before meals is greater than 1. Otherwise, it suggests that the gastric motility is low after the meal, or there is excessive expansion of the stomach in the case of fasting, and the stomach cannot be further expanded after the meal. When the antral motility is low, gastric tachycardia (greater than 4 weeks/min) or gastric hyperactivity (less than 2 weeks/min) can also be seen. Need to check the crowd: patients with gastroparesis, patients with abnormal gastric motility. Low results may be diseases: pediatric recurrent abdominal pain, chest syndrome, gastroparesis syndrome, gastric teratoma, stagnation of stomach sputum, sputum, pediatric peptic ulcer, pediatric milk, stagnation, spleen疳Notes Taboo before inspection: 1. Check in the early morning after fasting overnight. 2, 48 hours before surgery, the drug will affect the gastric myoelectric activity. 3. Explain the whole process of the examination to the patient and obtain cooperation. 4. Sign the consent form (if the hospital has this requirement). 5. Patients should pay attention to the interference of electrodes and other radio waves (mobile phones, etc.). Taboo when checking: 1. Intraoperative patients maintain a comfortable position and reduce errors caused by exercise. 2. Avoid talking or moving position during the inspection. 3, the examination time is too short, may miss a short stomach arrhythmia. 4. Insufficient skin preparation may amplify errors caused by interference from motion or other electrical waves such as cellular telephones. Inspection process 1. Shave the body hair where the electrode is placed. 2. Clean the skin with a rubbing agent. 3. Place the conductive paste in the center of the electrode and let it dry for 1 minute. 4. Wipe off excess conductive paste from the electrode. 5. Place the detection electrode along the axis of the gastric antrum. One electrode is placed on the midline of the abdomen, the midpoint of the xiphoid is connected to the umbilical line, and the other detection electrode is placed at a 45° angle of 5 cm to the upper left. The reference electrode is placed 10 to 15 cm at the same level as the right abdomen and the median electrode. 6. Check the impedance of the test electrode with an ohmmeter. If the impedance is less than 5K, the EGG test can be performed. Otherwise, skin preparation or replacement of new electrodes should be repeated. 7, first check on an empty stomach for 30 to 60 minutes. 8. Give the patient a standard meal (eg egg sandwich plus 200ml water). Marked after meals and before meals. Some devices have a note button for marking. 9. Check for 60 to 90 minutes after the meal. 10. After the surgery, remove the detection electrode. Not suitable for the crowd Not suitable for people: patients who cannot sit still or sit still. Adverse reactions and risks Nothing.