Transition from Enteral to Oral Nutrition in Intensive Care and Post Intensive Care Patients: A Scoping Review

Background: Limited information exists regarding the current practice of transitioning from enteral nutrition (EN) to oral nutrition (ON) and the effect of this process on the relationship between energy and protein requirement, provision, and nutritional status of intensive care and post-intensive care patients. Current practices and policies to the transition from EN to ON based on perspectives, experiences and opinions of health professionals and patients, are neither widely understood nor consistently implemented. Aim: The scoping review aims to summarize the current state of research on the transition process from EN to ON in intensive care unit (ICU) patients and post-ICU patients. The aim is to understand the impact of this process on the relationship between energy and protein requirements, and provision, as well as the impact on nutritional status. Additionally, the review aims to gather insights into the perspectives, experiences and opinions of healthcare professionals and patients regarding the transition process and the removal of enteral feeding tubes. Design: The literature search was conducted in PubMed, Cochrane Library and Scopus. Keywords and MeSH terms were applied, with additional papers identified by snowballing. Publications were manually screened based on inclusion and exclusion criteria to determine eligibility for inclusion. Results: A total of six studies were identified on this topic. One study found that, after the feeding tube was removed after ICU discharge, energy intake decreased from 97.3% to 65% and protein intake decreased from 91.5% to 60.6% of target values within one day after removal. Five additional studies revealed that the removal of feeding tubes is often a primary goal for nurses and physicians on the ward, and the decision to remove the tube is not based on an assessment of potential oral energy and protein intake. Reinsertion of a feeding tube is viewed as a setback by nurses and physicians. The process and decision-making of the tube removal seems to be unclear as well as the involvement of patients in the process. No studies were found examining the correlation between nutritional status and the transition process. Conclusions: Energy and protein intake appear to decrease directly after removal of the feeding tube. The decision to remove a feeding tube is often influenced by the personal opinion of healthcare professionals or institutional practices, rather than on the basis of an assessment of oral energy and protein intake. Additional studies are needed to further explore the transition process, the perspectives and experiences of healthcare professionals, and the impact of the process on energy and protein adequacy as well as the nutritional status of ICU and post-ICU patients.