Annals of Clinical Nutrition and Metabolism

New goals and new opportunities for better nutrition care in hospitals: Kwang Joon Kim; Ann Clin Nutr Metab 2023;15(2):39-39. Published online August 1, 2023; DOI: https://doi.org/10.15747/ACNM.2023.15.2.39

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Perioperative nutrition support: a narrative review: Rajeev Joshi, Asma Khalife; Ann Clin Nutr Metab 2023;15(2):40-45. Published online August 1, 2023; DOI: https://doi.org/10.15747/ACNM.2023.15.2.40

Abstract PDF: Purpose: Proper nutrition and supplementation are paramount in surgical patients. Suboptimal nutrition status is increasingly recognized as an independent predictor of poor surgical outcomes. The purpose of this review is to highlight the need for nutritional protocols, with an emphasis on perioperative nutrition.
Current concept: Perioperative nutrition support is considered an adjunctive strategy in most centers, although it is proven to be the key in improving surgical outcomes. There is a need to increase the standards and formulate policies and protocols to optimize perioperative nutrition support. Components of perioperative nutrition include nutritional screening and assessment, prehabilitation, preoperative metabolic optimization and carbohydrate loading, postoperative early enteral feeding and perioperative parenteral nutrition, immunonutrition and micronutrients, and oral nutritional supplementation vs. hospital-based kitchen feeds. Supplemental parenteral nutrition becomes valuable when enteral nutrition alone cannot fulfil energy needs. In patients in the surgical intensive care unit who are dealing with hemodynamic instability, high levels of serum lactate unrelated to thiamine deficiency, acidosis, significant liver dysfunction, high blood sugar, and high blood lipid levels, parenteral nutrition must be started with caution. In the post-surgery care ward, it is advisable to administer up to 30 kcal/kg/day and 1.2–2 g/kg/day of protein.
Conclusion: The positive impact of comprehensive nutritional support and the importance of setting and executing standards must be highlighted. Emphasis should be placed on overcoming existing challenges in implementing nutrition therapy in current surgical practice, as better perioperative nutrition supports better surgical outcomes.

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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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Changes in mineral and vitamin profiles after bariatric surgery in Korea: a before and after study: Jong Seob Park, Sang-Moon Han; Ann Clin Nutr Metab 2023;15(2):51-56. Published online August 1, 2023; DOI: https://doi.org/10.15747/ACNM.2023.15.2.51

Abstract PDF: Purpose: Bariatric surgery induces nutritional deficiencies that require long-term monitoring and supplementation. This study aimed to evaluate the status of vitamins and minerals pre-operation and 2 years post-operation and to compare the findings according to type of bariatric surgery.
Methods: The study enrolled 302 patients who underwent bariatric surgery, adjustable gastric band (AGB), sleeve gastrectomy (SG), or Roux-en-Y gastric bypass (RYGB) between 2013 and 2017 in the CHA Gangnam Medical Center and the Seoul Medical Center, Korea. Minerals and vitamin status was assessed at baseline (pre-operatively) until 2 years after bariatric surgery.
Results: Mean age was 34.1±8.3 years, 256 patients (84.8%) were female, and mean body mass index was 35.3±5.7 kg/m². Vitamin B1, vitamin B12, and folic acid levels were significantly different at 1 and 2 years after surgery compared to baseline. Hemoglobin, hematocrit, high-density lipoprotein, iron, calcium, and magnesium levels did not differ significantly during the study period.
Conclusion: Although enrolled patients had no clinical symptoms of nutritional deficiences, several indicators related to nutrition decreased at 2 years after bariatric surgery. Despite variations in the alteration of laboratory results across three surgical interventions, namely SG, AGB, and RYGB, a consistent reduction in fasting blood sugar was observed subsequent to the surgical procedures.

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Consultation pattern changes of parenteral nutrition with a multidisciplinary nutrition support team in a recently opened hospital in Korea: a retrospective cohort study: Kyoung Won Yoon, Hyo Jin Kim, Yujeong Im, Seul Gi Nam, Joo Yeon Lee, Hyo Gee Lee, Joong-Min Park; Ann Clin Nutr Metab 2023;15(2):57-63. Published online August 1, 2023; DOI: https://doi.org/10.15747/ACNM.2023.15.2.57

Abstract PDF: Purpose: Parenteral nutrition (PN) is essential for the treatment of patients with malnutrition. The provision of central PN should be recommended by a nutrition support team (NST) made up of a team of experts, even in a newly established hospital. This study sought to evaluate the effectiveness of PN delivered by a multidisciplinary NST in a recently opened hospital.
Methods: This was a retrospective study of the effectiveness of a central PN recommendation pop-up message by the electronic medical record (EMR) software to prompt physicians to either calculate the required calorie and protein intake or consult with the NST. The study period was divided into pre-NST and post-NST based on the time of recruitment of NST-dedicated personnel.
Results: Patients in the 12-week pre-NST period (n=50) and 12-week post-NST period (n=74) were compared retrospectively. Baseline characteristics were not significantly different between the two groups, except for the median Acute Physiology and Chronic Health Evaluation II score (pre-NST group, 8 [interquartile range, IQR 5–15.5] vs. post-NST group, 15 [IQR 9–24], P=0.012) of the 45 patients total admitted to the intensive care unit. The percentage of patients for whom physicians requested a consultation with the NST for central PN was significantly higher in the post-NST group (52.0% vs. 75.7%, P=0.011). There was no significant difference in achievement of nutrition targets or mortality.
Conclusion: Building a multidisciplinary NST may increase awareness of nutritional status and affect the behavior of physicians in recently-opened hospitals.

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