Gastric motility measurement

The measurement of gastric motility is reflected in the ability of the stomach to contain food, the speed at which the stomach empties different types of food, whether the movement of the antral pylorus and duodenum during the digestive and digestive phases is normal, whether there is reverse movement and the stomach. Electrical pacing and rhythm are abnormal. After one hour of eating, most of the indigestible markers remain in the stomach, especially after a small test meal, indicating that the patient may lack the digestive phase contraction or contraction. Basic Information Specialist classification: Digestive examination classification: other examinations Applicable gender: whether men and women apply fasting: not fasting Tips: You should be accompanied by someone to prevent adverse reactions and someone to take care of. Normal value 1. After eating for one hour, there is no or a small amount of indigestible markers in the stomach. 2. The frequency of gastric antrum contraction after meal is >50 hours, and the average amplitude is >30mmHg/2 hours, which often indicates a decrease in gastric motility. Clinical significance Abnormal results: 1. After eating for one hour, most of the indigestible markers remain in the stomach, especially after a small test meal, indicating that the patient may lack the digestive phase contraction or contraction. 2. The frequency of gastric antrum contraction after meal is <50 hours, and the average amplitude is less than 30mmHg/2 hours, which often indicates a decrease in gastric motility. Need to check patients with abnormal gastric motility. Precautions Taboo before the examination: should be accompanied by someone to prevent adverse reactions to be taken care of. Taboo when checking: 1. Pay attention to record the meal time. 2. The recording time is long, and the standardized pressure measuring equipment is needed. It is necessary to accumulate considerable experience in mastering the graphic judgment, and the subject should cooperate with the intubation and recording. Inspection process The main methods currently used to measure gastric motility are gastric emptying, gastric pressure measurement, and gastric tension measurement. 1. Gastric emptying test Nuclide method: Tc labeled solid test meal, electrogastrogram method with Fe304 labeled solid test meal, using a camera count or weak magnetic measuring instrument to detect changes in gastric magnetic field at different times after meal, determination The amount of markers in the stomach. 2. Determination of gastric pressure: Inserting a pressure manifold or a catheter with a miniature pressure sensor into the stomach. In fact, many studies have inserted the catheter into the duodenum to simultaneously measure the pressure changes in the stomach and duodenum. The tube needs to be positioned under fluoroscopy, and sometimes the endoscope is placed on the guide wire and the intubation pressure measurement time should be determined according to requirements. Generally, the empty stomach pressure is measured for 3 hours, and the test meal is 2 hours later. If the portable pressure monitoring system is applied, the recording time can be up to 24 hours. 3. Determination of gastric tension: a balloon is placed at the proximal end of the gastric cavity, and is connected to the electronically regulated pump. When the stomach is slack, the electric pump pumps the gas, and when the contraction, the gas is sucked out, so that the constant low pressure level is always maintained in the airbag. The slow contraction and relaxation of the upper part of the stomach were measured, and the change in the volume of the balloon at different levels of the internal pressure of the balloon was also observed. Not suitable for the crowd Unsuitable for people: people who are sensitive to radioactive elements.