Gastric free hydrochloric acid determination

The free acid is hydrochloric acid, and the combined acid refers to hydrochloric acid which is loosely bound to protein. Increased gastric acid is seen in ulcer disease, high acid gastritis, pyloric obstruction, gastrinoma (secretion of gastric acid is often 3 to 6 times more than normal people). Basic Information Specialist classification: Digestive examination classification: endocrine examination Applicable gender: whether men and women apply fasting: fasting Tips: Eliminate tension and try to get the stomach juice with your doctor. Normal value The free acid of normal fasting gastric juice is 0-30U, with an average of 18U. After taking the test for 1 hour or injecting histamine for 20 minutes, the free acid gradually reached its peak. After the free acid test, the dosage is 25~50U, and after the injection of histamine, it can reach 30~120U. Clinical significance Increased gastric acid is seen in ulcer disease, high acid gastritis, pyloric obstruction, gastrinoma (secretion of gastric acid is often 3 to 6 times more than normal people). Gastric acid reduction is seen in atrophic gastritis, gastric dilatation, secondary iron deficiency anemia, pernicious anemia, and gastric cancer. In the case of true gastric acid deficiency, gastric acid does not increase after the test meal or injection of histamine, but it is also occasionally seen in the elderly without gastric acidosis. Low results may be diseases: atrophic gastritis, high gastric dilatation results may be high disease: gastrinoma, pyloric obstruction 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 If the gastric juice can be withdrawn, the stomach tube is proved to be in the stomach.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 The volume of each gastric juice and the amount of titratable acid should be determined. Take 5 ml of gastric juice and add 2 drops of phenol red indicator, titrate with 0.1 mol/L sodium hydroxide solution to the end point, and use PH meter to indicate the end point. From the amount of gastric juice used and the amount of sodium hydroxide, the calculation was performed to obtain BAO, MAO, and PAO. 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.