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1.
Clinical nutrition for the gastroenterologist: the physiologic rationale for providing early nutritional therapy to the hospitalized patient.
McClave, SA, Omer, E
Current opinion in gastroenterology. 2020;(2):118-121
Abstract
PURPOSE OF REVIEW Conflicting reports in the literature have been misinterpreted by clinicians, who conclude that nutritional therapy for the hospitalized patient is of marginal value. The true benefit of such therapy is derived from the provision of early enteral nutrition. This article describes the physiologic response to enteral feeding, which accounts for the outcome benefits, and illustrates how use of the gut alters immune responses and the intestinal microbiota. RECENT FINDINGS The provision of early enteral nutrition has been shown to reduce infection and mortality in high-risk hospitalized patients (compared with not providing such therapy). Early feeding maintains gut integrity, reduces permeability, promotes tolerance and appropriate immune responses, and supports commensalism of the intestinal microbiota. Early enteral nutrition influences cross-talk signaling between luminal bacteria and the intestinal epithelium. Failure to utilize the gut in acute illness can amplify the systemic inflammatory response syndrome and worsen disease severity, while at the same time promoting antibiotic resistance and increased septic morbidity. SUMMARY Appropriate nutritional therapy does change outcomes in the hospitalized patient, especially for those who are at risk on the basis of disease severity and/or poor nutritional status. Greatest benefit is seen from those therapeutic regimens that specifically target gut defenses and the intestinal microbiome.
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2.
Feeding During Resuscitation After Burn Injury.
Masch, JL, Bhutiani, N, Bozeman, MC
Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition. 2019;(5):666-671
Abstract
Burn injury results in a sustained hypermetabolic state with resulting increased caloric and protein requirements to support the stress and immune responses; augmented protein, fat, and carbohydrate catabolism; oxidative stress; and exudative losses. Along with surgical debridement, nutrition and resuscitation are the foundations of patient management after severe burn injury. Recent literature has demonstrated a clear benefit to early enteral nutrition initiation during the resuscitation period. This review aims to examine recent literature discussing both physiologic impact of burn injury and approaches to feeding during resuscitation after burn injury; including methods of determining nutrition requirements, routes, timing, and monitoring response and the associated benefits and consequences thereof.
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3.
Exclusive enteral nutrition in Crohn's disease: Evidence and practicalities.
Ashton, JJ, Gavin, J, Beattie, RM
Clinical nutrition (Edinburgh, Scotland). 2019;(1):80-89
Abstract
Exclusive enteral nutrition (EEN) is the first line therapy for paediatric Crohn's disease, providing a complete nutritional feed whilst simultaneously inducing remission in up to 80% of cases. The effect of EEN on systemic/local intestinal immune function and subsequent inflammation (including barrier permeability, direct anti-inflammatory effects and cytokine signalling pathways), alongside changes in the microbiome (specific species and broad taxonomic shifts, functional changes) are becoming clearer, however the exact mechanism for induction of remission in Crohn's disease remains uncertain. The evidence of efficacy in paediatric Crohn's disease is strong, with selected adult populations also benefiting from EEN. However despite recommendations from all major societies (ECCO, ESPGHAN, NASPGHAN and ESPEN) first-line use of EEN is varied and Europe/Australasia/Canada show significantly more routine use than other parts of North America. Growth and nutritional status are significantly improved with EEN compared to corticosteroids but long-term outcomes are sparse. This review discusses the evidence underlying the use of EEN, highlighting the mechanisms thought to underlie how EEN induces remission in Crohn's disease, when and how to use EEN, including practical issues in both paediatric and adult practice (formulation, compliance, volumes and administration), and summarises the ongoing research priorities.
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4.
Energy Expenditure and Protein Requirements Following Burn Injury.
Wise, AK, Hromatka, KA, Miller, KR
Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition. 2019;(5):673-680
Abstract
Severe burn injuries have long been known to have a profound effect on metabolic equilibrium that can persist after resolution of the cutaneous injuries. Following burn injury, metabolism is a dynamic state resulting in the need for frequent interval reassessment over the course of the care continuum. The acute phase of injury transitions to chronic alterations in macronutrient utilization characterized by futile energy cycling and disproportionate catabolism of skeletal muscle. Protein supplementation appears to be preferentially distributed to the burn wound rather than the skeletal muscle pool. Accurate assessment of caloric and protein requirements is extremely difficult in these patients but is an essential step in efforts to attenuate functional impairment. Indirect calorimetry should be utilized to determine caloric requirements, but trophic feeding strategies are preferred in the initial resuscitative phase to prevent overfeeding while maintaining enteric and immune function. Controversy persists regarding optimal protein targets, and weight-based estimates remain the norm. Exogenous protein and caloric provision performed in isolation is insufficient to optimize outcomes and should be incorporated within a multidisciplinary approach to include muscle loading and pharmaceutical adjuncts.
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5.
Enteral immunonutrition versus enteral nutrition for gastric cancer patients undergoing a total gastrectomy: a systematic review and meta-analysis.
Cheng, Y, Zhang, J, Zhang, L, Wu, J, Zhan, Z
BMC gastroenterology. 2018;(1):11
Abstract
BACKGROUND Nutrition support is a common means for patients with gastric cancer, especially for those undergoing elective surgery. Recently, enteral immunonutrition (EIN) was increasingly found to be more effective than enteral nutrition (EN) in enhancing the host immunity and eventually improving the prognosis of gastric cancer patients undergoing gastrectomy. However, the results reported were not consistent. This meta-analysis aimed to assess the impact of EIN for patients with GC on biochemical, immune indices and clinical outcomes. METHODS Four electronical databases (Medline, EMBASE, Scopus and Cochrane library) were used to search articles in peer-reviewed, English-language journals. Mean difference (MD), Relative risk (RR), or standard mean difference (SMD) with 95% confidence interval (CI) were calculated. Heterogeneity was assessed by Cochrane Q and I2 statistic combined with corresponding P-value. The analysis was carried out with RevMan 5.3. RESULTS Seven studies involving 583 patients were eligible for the pooled analysis. EIN, when beyond a 7-day time-frame post-operatively (D ≥ 7), increased level of CD4+ (SMD = 0.99; 95% CI, 0.65-1.33; P < 0.00001), CD4+/ CD8+ (SMD = 0.34; 95% CI, 0.02-0.67; P = 0.04), the IgM (SMD = 1.15; 95% CI, 0.11-2.20; P = 0.03), the IgG (SMD = 0.98; 95% CI, 0.55-1.42; P < 0.0001), the lymphocyte (SMD = 0.69; 95% CI, 0.32-1.06; P = 0.0003), and the proalbumin (SMD = 0.73; 95% CI, 0.33-1.14; P = 0.0004). However, those increased effects were not obvious within a 7-day time-frame post-operatively (D < 7). The levels of CD8+ and other serum proteins except proalbumin were not improved both on D ≥ 7 and D < 7. Clinical outcomes such as systemic inflammatory response syndrone (SIRS) (MD, - 0.89 days; 95% CI, - 1.40 to - 0.39; P = 0.005), and postoperative complications (RR, 0.29; 95% CI, 0.14-0.60; P = 0.001) were significantly reduced in EIN group. Pulmonary infection and length of hospitalization (LHS) were not improved no matter what time after surgery. CONCLUSIONS EIN was found to improve the cellular immunity, modulate inflammatory reaction and reduce postoperative complication for GC patients undergoing radical gastrointestinal surgery. Exclusion of grey literature and non-English language studies was the key limitation in this study.
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6.
Influence of nutrition therapy on the intestinal microbiome.
Krezalek, MA, Yeh, A, Alverdy, JC, Morowitz, M
Current opinion in clinical nutrition and metabolic care. 2017;(2):131-137
Abstract
PURPOSE OF REVIEW This review describes the relationship between nutritional therapies and the intestinal microbiome of critically ill patients. RECENT FINDINGS The intestinal microbiome of the critically ill displays a near complete loss of health-promoting microbiota with overgrowth of virulent healthcare-associated pathogens. Early enteral nutrition within 24 h of admission to the ICU has been advocated in medical and surgical patients to avoid derangements of the intestinal epithelium and the microbiome associated with starvation. Contrary to previous dogma, permissive enteral underfeeding has recently been shown to have similar outcomes to full feeding in the critically ill, whereas overfeeding has been shown to be deleterious in those patients who are not malnourished at baseline. Randomized clinical trials suggest that peripheral nutrition can be used safely either as the sole or supplemental source of nutrition even during the early phases of critical care. The use of probiotics has been associated with a significant reduction in infectious complications in the critically ill without a notable mortality benefit. SUMMARY Focus of research is shifting toward strategies that augment the intestinal environment to facilitate growth of beneficial microorganisms, strengthen colonization resistance, and maintain immune homeostasis.
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Nutrition interventions in patients with gynecological cancers requiring surgery.
Obermair, A, Simunovic, M, Isenring, L, Janda, M
Gynecologic oncology. 2017;(1):192-199
Abstract
OBJECTIVE Including developing countries, between 20 and 88% of gynecological oncology patients may present with at least mild malnutrition at diagnosis. Significant morbidity and mortality is attributed to malnutrition. Here we reviewed randomized clinical trials of nutritional interventions used to achieve early return to oral diet, enhance recovery from surgery and reduce adverse events in gynecological cancer patients undergoing surgery. METHODS Ebscohost (CINAHL+Medline+PsycINFO), Cochrane, Embase, PubMed and Scopus databases were searched for articles published from 2000 onwards. Potentially eligible articles were screened by two reviewers. Length of hospital stay (LOS), postoperative complications, recovery of intestinal function, quality of life (QOL), hematological and immunological parameters were outcome measures of the nutritional interventions. RESULTS Seven randomized clinical trials were included in the review. Early clear liquid diet, semiliquid diet, regular diet or immune-enhanced enteral diets were all found to be safe as nutritional interventions. In five of the seven trials significantly better outcomes were observed in the intervention group compared to usual care for one of more of the outcomes intestinal recovery time, LOS, postoperative complications and immunological parameters. However, the nutritional interventions varied greatly between the trials, making it difficult to directly compare their findings. Trial quality was low to moderate. Recommended malnutrition screening and assessment tools and guidelines for treatment are reviewed. CONCLUSIONS From the limited findings it would appear that nutritional interventions of early oral feeding and enteral feeding are safe. Receiving nutritional interventions seems to reduce LOS, intestinal recovery time and postoperative complications for some patients. Increasing use of neoadjuvant treatment may reduce the prevalence of patients presenting malnourished for surgery in the future.
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The intensive care medicine research agenda in nutrition and metabolism.
Arabi, YM, Casaer, MP, Chapman, M, Heyland, DK, Ichai, C, Marik, PE, Martindale, RG, McClave, SA, Preiser, JC, Reignier, J, et al
Intensive care medicine. 2017;(9):1239-1256
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Abstract
PURPOSE The objectives of this review are to summarize the current practices and major recent advances in critical care nutrition and metabolism, review common beliefs that have been contradicted by recent trials, highlight key remaining areas of uncertainty, and suggest recommendations for the top 10 studies/trials to be done in the next 10 years. METHODS Recent literature was reviewed and developments and knowledge gaps were summarized. The panel identified candidate topics for future trials in critical care nutrition and metabolism. Then, members of the panel rated each one of the topics using a grading system (0-4). Potential studies were ranked on the basis of average score. RESULTS Recent randomized controlled trials (RCTs) have challenged several concepts, including the notion that energy expenditure must be met universally in all critically ill patients during the acute phase of critical illness, the routine monitoring of gastric residual volume, and the value of immune-modulating nutrition. The optimal protein dose combined with standardized active and passive mobilization during the acute phase and post-acute phase of critical illness were the top ranked studies for the next 10 years. Nutritional assessment, nutritional strategies in critically obese patients, and the effects of continuous versus intermittent enteral nutrition were also among the highest-ranking studies. CONCLUSIONS Priorities for clinical research in the field of nutritional management of critically ill patients were suggested, with the prospect that different nutritional interventions targeted to the appropriate patient population will be examined for their effect on facilitating recovery and improving survival in adequately powered and properly designed studies, probably in conjunction with physical activity.
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9.
ASPEN-FELANPE Clinical Guidelines.
Kumpf, VJ, de Aguilar-Nascimento, JE, Diaz-Pizarro Graf, JI, Hall, AM, McKeever, L, Steiger, E, Winkler, MF, Compher, CW, , , ,
JPEN. Journal of parenteral and enteral nutrition. 2017;(1):104-112
Abstract
BACKGROUND The management of patients with enterocutaneous fistula (ECF) requires an interdisciplinary approach and poses a significant challenge to physicians, wound/stoma care specialists, dietitians, pharmacists, and other nutrition clinicians. Guidelines for optimizing nutrition status in these patients are often vague, based on limited and dated clinical studies, and typically rely on individual institutional or clinician experience. Specific nutrient requirements, appropriate route of feeding, role of immune-enhancing formulas, and use of somatostatin analogues in the management of patients with ECF are not well defined. The purpose of this clinical guideline is to develop recommendations for the nutrition care of adult patients with ECF. METHODS A systematic review of the best available evidence to answer a series of questions regarding clinical management of adults with ECF was undertaken and evaluated using concepts adopted from the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) Working Group. An anonymous consensus process was used to develop the clinical guideline recommendations prior to peer review and approval by the ASPEN Board of Directors and by FELANPE. QUESTIONS In adult patients with enterocutaneous fistula: (1) What factors best describe nutrition status? (2) What is the preferred route of nutrition therapy (oral diet, enteral nutrition, or parenteral nutrition)? (3) What protein and energy intake provide best clinical outcomes? (4) Is fistuloclysis associated with better outcomes than standard care? (5) Are immune-enhancing formulas associated with better outcomes than standard formulas? (6) Does the use of somatostatin or somatostatin analogue provide better outcomes than standard medical therapy? (7) When is home parenteral nutrition support indicated?
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Should Immune-Enhancing Formulations Be Used for Patients With Acute Respiratory Distress Syndrome?
Roosevelt, H
Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition. 2016;(4):451-6
Abstract
The potential for regulating immune function in acute respiratory distress syndrome (ARDS) through enteral-administered anti-inflammatory lipids has generated much interest over the past 20 years. Yet recommendations remain inconclusive regarding the utilization of ω-3 fatty acids in patients with ARDS and acute lung injury (ALI). Studies are limited in number, with differing methods, small sample sizes, and conflicting results, making recommendations difficult to interpret.