Enhanced recovery after surgery: operation-related factors

Background: The enhanced recovery after surgery (ERAS) program, which has been recently introduced in the field of perioperative care, represents a multimodal strategy to attenuate the loss, and improve the restoration, of functional capacity after surgery. This program aims to reduce morbidity and enhance recovery by reducing surgical stress, optimizing pain control, and facilitating early resumption of an oral diet and early mobilization. Considering this perspective, protocols for enhanced recovery should include comprehensive and evidence-based guidelines for best perioperative care. Appropriate protocol implementation may reduce complication rates and enhance functional recovery and thereby reduce the duration of hospitalization.Current Concepts: In major abdominal surgeries, the recommended ERAS protocols involve common items such as preoperative counseling, preoperative optimization, prehabilitation, preoperative nutrition, fasting and carbohydrate loading, bowel preparation, thromboprophylaxis, antimicrobial prophylaxis, surgical access, drainage, nasogastric intubation, urinary drainage, early mobilization and prevention of postoperative ileus, postoperative glycemic control, and postoperative nutritional care. These items have been briefly reviewed with the relevant evidence.Discussion and Conclusion: ERAS is a comprehensive and evidence-based guideline for optimal perioperative care. Although a number of ERAS items still require high-level evidence through well-designed randomized controlled trials, the ERAS guidelines can serve as adequate recommendations for our practice. Thus, these items can be introduced and adopted with evidence. In addition, it is important to remove items that are not supported by evidence from routine procedures.