BVS	Biblioteca Virtual de Saúde
CINAHL	Cumulative Index to Nursing and Allied Health Literature
DeCS	Descritores em Saúde (Health Sciences Descriptors)
GRV	Gastric Residual Volume
I-AIM	Indication, Acquisition, Interpretation, and decision-Making
ICU	Intensive Care Unit
LILACS	Literatura Latino-Americana e do Caribe em Ciências da Saúde
MeSH	Medical Subject Headings
NGT	Nasogastric Tube
PoCUS	Point-of-Care Ultrasonography
PRISMA	Preferred Reporting Items for Systematic reviews and Meta-Analyses