Diagnostic Accuracy of Using Point-of-care Ultrasonography for Confirming Nasogastric Tube Placement

Inclusion Criteria: * Aged 18 or older; * Living in the community or admitted to a medical and geriatric ward; * Requiring the use of an NGT during the recruitment period for assessment, monitoring, nutritional assistance, drainage, and/or medication administration; * Aspirated fluids with a pH value of more than 5.5 after insertion or with insufficient fluids for pH testing after insertion; Exclusion Criteria: * Uncooperative patients; * Had head and neck injury * Have had a gastrectomy or by-pass surgery; * History of abdominal trauma or receiving emergency life support intervention at time of recruitment.