Role of gastric ultrasound to guide enteral nutrition in the critically ill

Purpose of reviewEarly initiation of enteral nutrition (EN) is often not feasible due to the high prevalence of gastrointestinal dysfunction that constitutes one of the leading nonavoidable causes for discontinuing or delaying enteral feeding in critically ill. This review summarizes current evidence on the role of gastric ultrasound as a management and monitoring tool for enteral nutrition in critically ill patients.Recent findingsThe ultrasound meal accommodation test, the gastrointestinal and urinary track sonography (GUTS), and other gastric ultrasound protocols used to diagnose and treat gastrointestinal dysfunction in critically ill patients have not changed the outcome. However, this intervention could help clinicians with accurate daily clinical decisions. The dynamic changes in the cross-sectional area (CSA) diameter could help to access gastrointestinal dynamics results immediately, provide a valuable guide to initiate EN, predict feeding intolerance (FI), and aid in following treatment response. More studies are necessary to determine the complete scope and true added clinical value of these tests in critically ill patients.Using gastric point of care ultrasound (POCUS) is a noninvasive, radiation-free, and inexpensive method. Implementing the ultrasound meal accommodation test in ICU patients might become a step forward to ensure safe early enteral nutrition in critically ill patients.