Hello, Alexey! Unfortunately, it is not clear from your question what exactly you want to get rid of in the stomach, and what are the motives for going through this particular procedure, therefore we cannot answer your question in more detail. We recommend that you consult a gastroenterologist. If necessary, the doctor will prescribe tests or procedures for you, based on your history, or recommend alternative research methods
What's in the stomach?
Why is it dear, according to indications it is free, according to compulsory medical insurance. Or are you not a citizen and no policy?
If you have painful symptoms, you need to see a doctor, he will tell you how to get rid of what is in your stomach. And the Internet does not heal.