[Catheterless testing of gastric juice acidity].
D005745:Gastric Acidity Determination; D006801:Humans; D066298:In Vitro Techniques; D008722:Methods; D008751:Methylene Blue; D013537:Sutures; D013997:Time Factors
D008751:Methylene Blue
Bezzondovoe issledovanie kislotnosti zheludochnogo soka.