“…In the United Kingdom, the National Institute of Health and Care Excellence published in 2011 good practice guidelines for ED and has argued that in an enhanced recovery program, the cost saving per patient when ED was used instead of a central venous catheter in the perioperative period was about £1100 based on a 7.5-day hospital stay [8]. These recommendations, however, have been discussed because they were based on a small number of RCTs with quite small and heterogeneous populations: Interventions studied were as diverse as cardiac, orthopedic, and abdominal surgery, in operative rooms or in HDUs [9]. More recently, other RCTs have been published focusing on abdominal surgery [10][11][12][13][14][15], but their results remain to be synthetized.…”