Annals of Clinical Nutrition and Metabolism

Perioperative nutritional practice of surgeons in Korea: a survey study: Ji-Hyeon Park, Mi Ran Jung, Sang Hyun Kim, Hongbeom Kim, Gyeongsil Lee, Jae-Seok Min, Heung-Kwon Oh, Jung Hoon Bae, Yoona Chung, Dong-Seok Han, Seung Wan Ryu, The External Relation Committee of the Korean Society of Surgical Metabolism and Nutrition; Ann Clin Nutr Metab 2024;16(3):134-148. Published online December 1, 2024; DOI: https://doi.org/10.15747/ACNM.2024.16.3.134

Abstract PDF Supplementary Material: Purpose: Enhanced recovery after surgery (ERAS) protocols advocate reduced fasting and early nutrition to improve recovery in surgical patients. However, data on ERAS implementation among Korean surgeons performing major abdominal surgeries remain sparse.
Methods: A survey conducted by the External Relation Committee of the Korean Society of Surgical Metabolism and Nutrition assessed perioperative nutritional practices among 389 Korean general surgeons from February to September 2023. The survey covered preoperative fasting, carbohydrate drinks, nasogastric tube use, postoperative dietary progression, parenteral nutrition (PN), and oral supplements, yielding 551 responses stratified by specialty.
Results: More than 80% of respondents practiced “midnight NPO (Nil Per Os)” fasting, often at the anesthesiology department’s request, while 70%–80% reported no use of preoperative carbohydrate drinks. Most surgeons began dietary progression with water on postoperative day one, advancing to a liquid or soft diet by day two. PN was routinely prescribed by 49% of respondents, with a common dosage of 1,000–1,500 kcal/d. Oral supplements were selectively provided, with 21% of surgeons prescribing them universally.
Conclusion: The results reveal significant variability in perioperative nutrition practices across Korean surgical specialties, with many adhering to traditional practices despite ERAS guidelines. These findings highlight a need for standardized guidelines in Korea to optimize perioperative nutritional support and improve patient recovery outcomes following major abdominal surgeries.

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Role of preoperative immunonutrition in patients with colorectal cancer: a narrative review: Soo Young Lee, Hyeung-min Park, Chang Hyun Kim, Hyeong Rok Kim; Ann Clin Nutr Metab 2023;15(2):46-50. Published online August 1, 2023; DOI: https://doi.org/10.15747/ACNM.2023.15.2.46

Abstract PDF: Purpose: Colorectal cancer surgery presents challenges due to surgical stress and immunosuppression, leading to postoperative complications. Nutrition is crucial for colorectal cancer patients who are prone to malnutrition. This study aims to provide a comprehensive review of the role of preoperative immunonutrition in colorectal cancer surgery.
Current concept: Preoperative immunonutrition, consisting of immunonutrients such as arginine, ω-3 fatty acids, and nucleotides, has emerged as a potential strategy to enhance surgical outcomes by modulating immune responses and reducing complications. Current guidelines recommend preoperative oral nutritional supplements for major abdominal surgery and immunonutrition for nutritionally high-risk patients. Meta-analysis have demonstrated significant decreases in infectious complications and hospital stay durations with preoperative immunonutrition. However, limitations such as publication bias and heterogeneity in the previous studies should be considered. Further research should focus on the optimal timing, duration, and amount of immunonutrition; the patient populations that would benefit most; and the integration of immunonutrition into enhanced recovery after surgery protocols.
Conclusion: While preoperative immunonutrition shows promise, additional research is crucial to refine protocols and establish optimal clinical practice utilization.

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Effect of Probiotics/Synbiotics on Postoperative Outcomes in Patients Undergoing Abdominal Surgery: In Ja Park; Ann Clin Nutr Metab 2022;14(1):10-19. Published online June 1, 2022; DOI: https://doi.org/10.15747/ACNM.2022.14.1.10

Abstract PDF: Environmental factors, drugs, diet, and surgery alter the composition of the gut microbiota leading to the production of different metabolites or toxins that can cause disease or delay postoperative recovery. Surgical damage leads to gut barrier disruption, increased intestinal permeability, gut microbial imbalance, and immunologic compromise of the host with subsequent bacterial translocation from the gastrointestinal tract to systemic circulation. Therefore, perioperative stabilization of the intestinal microbiota is a potential method of reducing postoperative complication rates. Probiotics have been proposed as a viable option for prophylaxis of postoperative infections through increased intestinal motility to prevent bacterial overgrowth, improve gut barrier function, and modulate immune response. This review investigates microbial changes after surgery and the influence of probiotics on postoperative microbial composition. Infectious postoperative complications and immunologic changes related to probiotics/synbiotics were also reviewed in patients who underwent abdominal surgery.

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Survey and Analysis of the Application and Implementations of Enhanced Recovery after Surgery (ERAS) Program for Surgical Patients in the Major Hospitals in Korea: Eun Young Kim, In Kyu Lee; Surg Metab Nutr 2019;10(2):32-45. Published online December 30, 2019; DOI: https://doi.org/10.18858/smn.2019.10.2.32

Abstract PDF: Purpose:

A questionnaire survey was conducted using e-mail to investigate the application status of ERAS in Korea and its implementation by their institution. The perceptions of ERAS by medical staff and the factors that interfered with the application of ERAS were investigated.

Materials and Methods:

From July 2017 to March 2019, a questionnaire was sent by e-mail to members of the KSSMN. This consisted of 41 questions divided into three parts to investigate 1) respondents’ prior knowledge and understanding of ERAS, 2) actual components of ERAS and its clinical application, and 3) performance and preference of the respondents to ERAS. The items were categorized into “high acceptance” when more than 75% of respondents answered “yes”, or the items into “low acceptance” when less than 25% answered “no”.

Results:

Overall, 86 participants completed the survey. Of these, 59(68.6%) had prior knowledge of ERAS and 29 (33.7%) applied ERAS clinically. Seventy (81.4%) and 40 (46.5%) answered that ERAS would have a positive effect on shortening the hospital stay and reducing the number of complications. Seventy four (86%) indicated that they would implement ERAS in the future. The factors impeding the implementation of ERAS were a lack of understanding of physicians and a shortage of manpower and resources for ERAS.

Conclusion:

The ERAS implementation rate and awareness level of surgeons were low, but the positive expectations of the clinical efficacy of ERAS and the wiliness to accept were high. Overall, it would be necessary to cooperate with institutions to improve the manpower and resources, and supplement the education to overcome the lack of awareness, which has been pointed out as an obstacle to the implementation of ERAS.

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Nutritional Assessment of Critically Ill Patients after Abdominal Surgery and Predisposing Factors of Prolonged ICU Stay after Surgery: Sung Eun Park, In Kyu Lee, Eun Young Kim; Surg Metab Nutr 2018;9(2):68-74. Published online December 30, 2018; DOI: https://doi.org/10.18858/smn.2018.9.2.68

Abstract PDF: Purpose:

Patients in prolonged intensive care unit stay were vulnerable to malnutrition which deteriorated recovery and postoperative outcomes. The purpose of this study was to evaluate nutritional status in surgical patients entering the intensive care unit, and to identify the risk factors that influence prolonged intensive care unit stay.

Materials and Methods:

From January 2016 to June 2018, 740 patients (age≥18 years) who were admitted to our surgical intensive care unit after abdominal surgery with general anesthesia (≥4 hours) were enrolled. Patients were classified into short-term stay group (≤4 days) and long-term stay group (>4 days). These groups were analyzed and compared with patient factors and postoperative outcomes and the multivariate analysis was performed to assess the risk factors for prolonged intensive care unit stay.

Results:

A total of 119 patients were analyzed. The univariate and multivariate analysis showed that dialysis status (Odds ratio 7.684, 95% confidence interval 1.038∼1.103, P=0.013), total lymphocyte count (Odds ratio 0.999, 95% confidence interval 0.998∼1.000, P=0.047), and intraoperative transfusion (Odds ratio 1.002, 95% confidence interval 1.001∼1.002, P=0.000) were associated with prolonged intensive care unit stay. Lone-term stay group were significantly longer hospital stay and higher hospital morbidity rate than short-term stay group.

Conclusion:

Patients with risk factors of prolonged intensive care unit stay included dialysis status, low total lymphocyte count, a large amount of transfusion would be more interested and the active intervention such as early nutritional evaluation and adequate nutritional support should be needed.

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