Quake

In the supine position, the examiner continuously and rapidly impacts the patient's upper abdomen with four fingers that are slightly bent and close together. If you hear the sound of the gas and liquid in the stomach colliding, it is called tremor. Appears when drinking. If the stomach still vibrates in the stomach on an empty stomach or more than 6-8 hours after a meal, it indicates a poor gastric emptying, which is seen in pyloric obstruction and gastric dilatation.