Annals of Clinical Nutrition and Metabolism

Original Article

Perioperative nutritional practices and attitudes among gastrointestinal oncologic surgeons in Korea: a nation-wide survey study: Dae Hoon Kim, Jeong-Meen Seo, Min-Gew Choi; Ann Clin Nutr Metab 2023;15(3):81-87. Published online December 1, 2023; DOI: https://doi.org/10.15747/ACNM.2023.15.3.81

Abstract PDF Supplementary Material: Purpose: This study aimed to investigate the current perioperative nutritional practices and attitudes among gastrointestinal (GI) oncologic surgeons in Korea. Evidence-based perioperative nutritional practices are not well-established in this field.
Methods: A nationwide survey was conducted with 24 items, targeting GI oncologic surgical faculty members from March 2022 to April 2022 through social networking service messaging and email. Whole target number was 3,421.
Results: Out of responding 161 GI surgeons, 83.9% were male and 16.1% were female, and about 49.7% were in their 40s. When asked about their hospital policies, 67.1% reported the existence of formal nutritional screening programs. However, the execution and analysis of these programs varied considerably. Most surgeons conducted preoperative nutritional screening, with albumin testing the most frequently performed. In addition, nutritional supplementation—primarily protein drinks—was given before surgery. The duration for which these supplements were used varied from ≤3 days to 4–7 days. Most respondents recognized the importance of addressing nutritional deficiencies in patients with GI tumors; however, when asked about immunonutrition, 89.4% of surgeons admitted having limited knowledge.
Conclusion: Although there is recognition of the importance of evidence-based nutrition practices in GI and oncologic surgery programs, this study reveals limited implementation of such practices. This study highlights a considerable opportunity to leverage existing positive surgeon beliefs and published data on the benefits of perioperative nutrition to enhance surgical nutrition practices and to improve patient outcomes in Korea.

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Review

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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Original Articles

Impact of Visceral Fat Area Measured by Bioelectrical Impedance Analysis on Clinico-Pathologic Outcomes of Colorectal Surgery: Kyeong Eui Kim, Woo Jin Song, Minji Seok, Sung Uk Bae, Woon Kyung Jeong, Seong Kyu Baek; J Clin Nutr 2021;13(1):17-23. Published online June 30, 2021; DOI: https://doi.org/10.15747/jcn.2021.13.1.17

Abstract PDF: Purpose: This study investigated the relationship between the visceral fat area (VFA) and clinico-pathological outcomes in patients with colorectal cancer (CRC).
Methods: This retrospective study included 204 patients who underwent anthropometric measurement by bioelectrical impedance analysis (BIA) before surgical treatment for CRC between January 2016 and June 2020.
Results: According to the average value of the visceral fat area, 119 (58.3%) patients had a low visceral fat area, and 85 (59.1%) patients had a high visceral fat area. Patients with visceral obesity showed a higher BMI compared to patients without visceral obesity, (21.8±1.9 vs. 25.7±2.5, P<0.001). There was no significant difference in the overall perioperative outcomes including total operation time, time to gas out, sips of water, soft diet, hospital stay, and morbidity between patients in the low and high VFA groups. We divided patients into two subgroups according to the degree of cancer progression and more advanced cases with low VFA showed significantly more total and positive retrieved lymph nodes (LNs) (20.9±10.3 vs. 16.1±7.1, P=0.021 and 3.3±2.9 vs. 2.2±2.3, P=0.019, respectively) and a higher proportion of more than 12 retrieved LNs compared to patients with a high VFA (95.1% vs. 90.0%, P=0.047). Body composition analysis showed that phase angle, muscle composition, and body fluid composition were not statistically different between the two groups. However, body fat mass was statistically higher in the high VFA group (22.0±4.6 vs. 12.8±3.1, P<0.001).
Conclusion: Visceral obesity measured by BIA showed lower total and positive retrieved LNs and was not associated with adverse peri-operative outcomes, inflammatory and nutritional, and pathologic outcomes for CRC.

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Analysis of Muscle Using CT Anthropometry in Major Trauma Patients: Hang Joo Cho, Yunsup Hwang, Yoon Hyun Lee, Dae Hyun Cho, Dae-Sang Lee, Maru Kim; Surg Metab Nutr 2020;11(1):12-15. Published online June 30, 2020; DOI: https://doi.org/10.18858/smn.2020.11.1.12

Abstract PDF: Purpose: The feasibility of nutritional assessment using computed tomography anthropometry has been previously proven. The abdominal muscle at the L3 vertebra is a well-known nutritional biomarker for predicting the prognosis of various diseases, and especially sarcopenia. However, any studies on nutritional assessment of the brain, face, or neck via computed tomography are still scarce. We retrospectively investigated the applicability of the masseter muscle as a nutritional biomarker.
Materials and Methods: Patients who underwent simultaneous brain and abdominopelvic computed tomography at a regional trauma center were retrospectively analyzed. Their masseter muscles at 2 cm below the zygomatic arch and abdominal muscle at L3 were assessed via computed tomography anthropometry. Basic clinical data including trauma information was also reviewed. The data was analyzed in conjunction with the patients’ mortality.
Results: A total of 411 patients were analyzed in the study (316 men and 95 women, mean age: 50.41 years, mean areas of the masseter and abdominal muscles: 10.6 and 137.3 cm², respectively) and there 146 major trauma patients with an injury severity score higher than 15. The masseter muscle area was decreased in the mortality group of major trauma patients (10.4 vs 7.9 cm², P=0.001). However, abdominal muscles did not show statistical significance (137.9 vs. 117.7 cm², P=0.054).
Conclusion: The masseter muscle, when analyzed via computed tomography anthropometry, showed a statistical association with patients’ mortality and it could prove its feasibility as a nutritional biomarker.

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Clinical Application of Bioelectrical Impedance Analysis and its Phase Angle for Nutritional Assessment of Critically III Patients: Hyung-Sook Kim, Eun Sook Lee, Yeon Joo Lee, Jae Ho Lee, Choon-Taek Lee, Young-Jae Cho; J Clin Nutr 2015;7(2):54-61. Published online August 31, 2015; DOI: https://doi.org/10.15747/jcn.2015.7.2.54

Abstract PDF: Purpose:
Phase angle (PA) is objectively determined from resistance and reactance measured by bioelectrical impedance analysis (BIA)−a quick, noninvasive method. The aim of this study was to evaluate the clinical application of PA by BIA for nutritional assessment of critically ill patients.
Methods:
Eighty nine adult patients admitted to a medical intensive care unit (ICU) of a tertiary academic hospital from August 2012 to September 2013 were analyzed. PA values were measured by direct segmental multi-frequency BIA. As traditional nutrition assessment tools, body mass index (BMI), serum albumin levels, total lymphocyte counts, and our hospital’s nutrition screening index (NSI) were also recorded. Correlations between the results of BIA and other traditional parameters were analyzed.
Results:
PA showed correlation with traditional nutritional parameters, including BMI (r=0.479), serum albumin (r=0.347), and NSI score (r=0.483). Patients with PA lower than the median value (3.5°) had significantly lower nutritional status, increased duration of mechanical ventilation (P=0.039), and increased length of ICU stay (P=0.041).
Conclusion:
PA, as a reflection of body cell mass, measured by BIA could be a potentially useful parameter for nutritional assessment in critically ill patients.

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