To detect Helicobacter pylori in patients' stomach, three detection methods are usually used: breath sampling, gastroscopy sampling and blood sampling.
Blood sampling test
That is, the antibody level of Helicobacter pylori in serum was detected by blood sampling. Because after being infected by Helicobacter pylori, the corresponding antibodies can be produced in the human body, which makes the test results positive, but it usually takes several months and a half to be positive. Therefore, in the early detection of Helicobacter pylori infection, the test results often appear false negative, thus making patients lose the best opportunity for treatment. In addition, even if helicobacter pylori is eradicated. However, the antibody drops slowly, and it often takes 1-2 years for patients to turn negative, which will inevitably make the cured people bear the stigma of "positive" for a long time and receive redundant treatment.
Gastroscope sampling detection
Can "ride" when patients need gastroscopy.
Sampling, microscopic examination and biopsy sampling. Check whether there is a positive test for Helicobacter pylori. If it is positive, it can be confirmed that Helicobacter pylori infection is positive. In order to make a suitable treatment plan for patients, sometimes bacterial culture and drug sensitivity test can be added. After sampling under gastroscope, polymerase chain reaction can also be used for detection with high sensitivity and reliable results. You can also do rapid urease detection, which is simple and rapid, but the results are not reliable due to short observation time or some factors. There are still the following problems in gastroscopy sampling: patients need to endure the pain of inserting endoscope, and if Helicobacter pylori is distributed in lesions, it will easily lead to missed diagnosis (the missed diagnosis rate is about 10%). But with doctors' rich operating experience and correct sampling, the missed diagnosis rate can be reduced.