China 
Africa 
Explore chapters and articles related to this topic
Gastrointestinal tract and salivary glands
Published in A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha, Clark’s Procedures in Diagnostic Imaging: A System-Based Approach, 2020
A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha
Apart from failed or declined endoscopy, contrast image acquisition of the stomach would be tailored to the clinical question posed. Detail of this examination will be limited to the projections required and the order they should be performed in for best results. The examination should ideally be performed using a C-arm or an over-couch X-ray tube remote control fluoroscopic unit, or alternatively a conventional under-couch unit. The double contrast barium meal technique requires the barium and gas to be interplayed in such a manner that the entire stomach and duodenal bulb can be clearly demonstrated in double contrast.
Intraobserver and interobserver reliability of visible light spectroscopy during upper gastrointestinal endoscopy
Published in Expert Review of Medical Devices, 2018
Louisa J.D. van Dijk, Twan van der Wel, Desirée van Noord, Adriaan Moelker, Hence J.M. Verhagen, Daan Nieboer, Ernst J. Kuipers, Marco J. Bruno
VLS measurements are noninvasive and performed during upper endoscopy using a fiber-optic probe passed through the accessory channel of the endoscope. This probe emits white light and detects differences in the absorption spectra of the oxygenated and deoxygenated hemoglobin molecules [6]. The measured mucosal saturation reflects indirectly the adequacy of the gastrointestinal blood flow. VLS measurements are performed in clinical practice at three different locations during upper endoscopy: the antrum of the stomach, the duodenal bulb, and the descending duodenum. Based on previously determined cutoff values [4] in CMI-suspected patients, the outcomes are defined positive for ischemia if the measured saturation value is lower than 63% in the antrum, 62% in the duodenal bulb, and 58% in the descending duodenum in fasting state.