Introduction: Helicobacter pylori infection is widespread worldwide and is one of the most common chronic infections. Various diagnostic methods are used to diagnose the infection, which can be roughly divided into invasive and non-invasive methods. The thing that all invasive methods have in common is that they require oesophagogastroduodenoscopy, in which the nurse plays a key role Purpose: The aim of this thesis is to present gastrointestinal Helicobacter pylori infection and to study endoscopic examination (esophagogastroduodenoscopy) as a diagnostic method for Helicobacter pylori infection. Methods: The thesis uses a descriptive method of work with a review of domestic and foreign literature. An overview was done in the following databases: Pubmed, Medline, DiKUL, and Cochrane library. Additionally, we used Google Schoolar and the bibliographic database COBISS.SI. Results: The literature review examined three main topics: infection with the bacteria Helicobacter pylori, diagnostic methods for detecting said infection, and the role of the nurse. For the latter, we focused on the impact of mental prepareness for oesophagogastroduodenoscopy, including information methods and music as a relaxation technique, which have been shown to be effective in reducing pre-examination anxiety. Discussion and conclusion: Helicobacter pylori infects almost half of the worlds population, with significant differences between geographical area scan be observed. The prevalence is higher in developing countries compared to developed countries. The highest prevalence is in Africa, while among European countries it is in Eastern and Southern Europe. A combination of different diagnostic methods is crucial for an accurate diagnosis of the infection, as each has its own advantages and disadvantages. The choice which method to use should also take into account possible factors that may influence the test results, such as bleeding from the peptic ulcer and the influence of different drugs (proton pump inhibitors, antibiotics, drugs containing bismuth). The nurse's aim is to establish a trusting relationship, give clear information about the test, and provide the necessary support to the patient. However, the nurse must also be aware that each patient is unique and requires a specific approach and attention. A quality mental prepareness is essential to reduce anxiety before gastroscopy.
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