Maximum gastric acid secretion measurement (MAO)

After stimulation with pentagastrin gastrin, the parietal cells fully exert their secretory function within 1 hour, and the amount of gastric acid that can be secreted is called MAO. There are many factors affecting gastric acid secretion. Although the specimens are collected and the test method is satisfactory, the test can still be affected by the patient's gender, spirit, age, appetite, alcohol and tobacco. Therefore, the determination of gastric acid secretion is less specific for the diagnosis of diseases, and only has a certain significance in the diagnosis of duodenal ulcer, gastrinoma, and gastric cancer. Basic Information Specialist classification: Digestive examination classification: endocrine examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Gastric cancer, severe atrophic gastritis can be a true gastric acid deficiency. Normal value: MAO (basic gastric fluid volume is 10 to 100 ml): 3-23 mmol/h Above normal: Gastrinoma: BAO>15mmoL/h, MAO>30mmol/h, BAO/MAO ratio,>0.6, so the pentapeptide gastrin test has been used as a diagnostic basis. negative: Positive: Tips: Eliminate tension and try to get the stomach juice with your doctor. Normal value The normal range of basic gastric fluid is 10 ~ 100ml; MAO3 ~ 23mmol / h. Clinical significance BDU and PAO increased in duodenal ulcer and complex ulcer, BAO>5mmol/h has diagnostic significance; if PAO>40mmol/h, it suggests that blood or perforation will be emitted. BAO and PAO decreased significantly after duodenal ulcer, and BAO and PAO decreased significantly after partial gastrectomy. If anastomotic ulcer appeared after operation, the two increased gradually. The pH>7 of the pentapeptide gastrin gastric acid secretion test is true gastric acid deficiency; if the pH is between 3.5 and 7.0, the gastric acid is too low; the gastric cancer and atrophic gastritis may be true gastric acid deficiency. Zhuoai syndrome (gastrin) BAO>15mmoL/h, MAO>30mmol/h, BAO/MAO ratio,>0.6, so the pentapeptide gastrin test has been used as a diagnostic basis. Low results may be diseases: atrophic gastritis, high results of sputum may be diseases: gastrinoma, incomplete, superficial gastritis precautions Eliminate tension and try to get your stomach juice with your doctor. Gastric tube collection method: 1. The action should be light when intubating, do not damage the esophageal mucosa. You should be proficient in the depth and method of intubation. 2. If coughing, difficulty breathing, cyanosis, etc. occur during intubation, it is suggested to enter the trachea. It should be pulled out immediately, and then rested after a short break. 3. After insertion, check if the stomach tube is in the stomach by the following method (1) Connect the end of the stomach tube to the syringe. If the gastric juice can be withdrawn, the stomach tube is proved to be in the stomach. (2) Inject 10 ml of air from the stomach tube with a syringe, and use a stethoscope to pick up the gas over water in the stomach, indicating that the stomach tube is in the stomach. (3) Place the open end of the stomach tube under the water surface, and insert the airway into the trachea if the patient escapes when exhaling. Inspection process 5 parts of gastric juice were taken 5 ml respectively, and 2 drops of phenol red indicator were added. Yellow indicates the presence of gastric acid. Titrate to pink with 0.1 mol/L NaOH, and multiply the number of ml of the NaOH solution by 20 to obtain the gastric acid concentration (mmol/L). Not suitable for the crowd Any esophageal varices, esophageal stenosis, esophageal tumor, aortic aneurysm, severe hypertension, cardiovascular disease, heart failure, late pregnancy, physical weakness and other serious diseases should not be inserted into the stomach tube. Adverse reactions and risks If coughing, difficulty breathing, cyanosis, etc. occur during intubation, it is suggested to enter the trachea. It should be pulled out immediately, and then rested after a short break.