Upper Gastrointestinal Disorder

The aim of this clinical trial is to investigate whether single-use gastroscopes perform comparably to reusable gastroscopes when used in an endoscopy unit during a period of reduced endoscope reprocessing capacity. The main question the study aims to answer is: \- How do endoscopists evaluate the performance of single-use gastroscopes compared with reusable gastroscopes in elective and subacute patients undergoing gastroscopy in the endoscopy unit? Researchers will compare single-use and reusable gastroscopes to determine whether they provide comparable clinical performance. In addition, the study will evaluate the economic consequences of temporarily implementing single-use gastroscopes during a period of reduced reprocessing capacity, as well as compare selected clinical outcomes, including technical success, procedural complications, and the frequency of endoscopic findings. Participants undergoing gastroscopy during the first study period will be examined using a single-use gastroscope. Participants undergoing gastroscopy during the second study period will be examined using a reusable gastroscope.

The aim of this study is to investigate whether single-use gastroscopes used bedside can reduce the time from indication to procedure compared with re-usable gastroscopes used at the endoscopy unit in patients referred to a subacute gastroscopy. Participants in the first period will be scheduled for gastroscopy with a re-usable gastroscope in the endoscopy unit, whereas participants during the second period will have a gastroscopy performed at the ward (bed-side) with a single-use gastroscope.

This is a combined retro- and prospective, monocentric study. All patients who underwent or are planned for laparoscopic partial fundoplication (180° anterior or 270° posterior) between 2020-2023 are assessed for preoperative ineffective esophageal motility (IEM). The main hypothesis is, that preoperative oesophageal motility disorders, especially hypo-contractility or failed peristalsis, are caused by gastro-oesophageal reflux. Therefore, postoperative manometry after partial wrap fundoplication (270° posterior, 180° anterior) shows a decrease in comparison to preoperative motility disorders. The primary objective of this study is to examine the postoperative esophageal motility in patients with known preoperative motility disorders. Secondary endpoints are the presence of other oesophageal motility disorders pre- vs. postoperatively (including new onset disorders), the assessment of the Gastrointestinal Symptom Rating Scale (GSRS) pre- vs. postoperatively, and more. If IEM is present preoperatively, patients are contacted at least 1 year after surgery and will be informed about the study and asked to participate. In case of agreement, they are invited to the study site. They undergo high-resolution manometry 18-24 months postoperatively (study intervention).

The goal of this clinical trial is to investigate whether single-use gastroscopes are as good as reusable gastroscopes when used in the operation theater in all patients where gastroscopy in the operation theater is indicated. The main question it aims to answer is: \- Is the technical success and performance characteristics the same for single-use and reusable gastroscopies? Researchers will compare single-use gastroscopes with reusable gastroscopes to see if the technical success and performance characteristics are the same in the to groups. Participants will in the first period have gastroscopy with a single-use gastroscope. In the second period participants will have gastroscopy with a reusable gastroscope.