Total enteral nutrition versus total parenteral nutrition during pediatric extracorporeal membrane oxygenation

Enteral nutrition in children and adolescents who receive extracorporeal membrane oxygenation and its impact on complications and mortality: A systematic review and meta-analysis

Enteral nutrition (EN) is one method of nutrition support for children and adolescents receiving extracorporeal membrane oxygenation (ECMO) therapy, and there are no guidelines for its use in this population. We conducted a systematic review to determine whether EN is effective and safe in children supported by ECMO. We searched the Cochrane Library database, MEDLINE, and Embase on Ovid in March 2023 to identify studies that evaluated children and adolescents who received ECMO and were treated with EN. Random effects meta-analysis was used to estimate the odds of mortality with EN compared with parenteral nutrition (PN). A total of 14 studies were included in this review with 1650 patients (796 received EN). The median duration of ECMO was 5-10 days, and the median EN initiation time ranged from 23 h to 7 days. The pooled results suggest no significant difference in mortality with EN compared with PN (odds ratio [OR] = 0.77; 95% CI, 0.56-1.05; I2 = 26%). Exclusion of the only study that reported an increase in mortality resulted in a borderline significant reduction in mortality with EN (OR = 0.71; 95% CI, 0.51-1.00; I2 = 26%). The predictors of EN were male sex, older age, heavier weight, greater height, cardiac diagnosis, longer duration of ECMO, and use of venovenous ECMO. Most studies suggest no correlation between EN and complications. EN use in children and adolescents who receive ECMO does not appear to be associated with increased mortality compared with PN and was safe in terms of intestinal complications and feeding intolerance.

Challenges of Nutrition Support in Pediatric Patients Requiring Extracorporeal Membrane Oxygenation

Nutrition support in critically ill infants and children remains an integral part of providing optimal care for these patients. The pediatric patient requiring extracorporeal membrane oxygenation therapy faces specific challenges to the provision of suitable nutrition support. In this review, we aimed to summarize the existing literature around some of the more challenging aspects of delivering appropriate nutrition to children receiving extracorporeal membrane oxygenation.

Nutrition for critically ill children with congenital heart disease

Children with congenital heart disease often require admission to the cardiac intensive care unit at some point in their lives, either after elective surgical or catheter-based procedures or during times of acute critical illness. Meeting both the macronutrient and micronutrient needs of children in the cardiac intensive care unit requires complex decision-making when considering gastrointestinal perfusion, vasoactive support, and fluid balance goals. Although nutrition guidelines exist for critically ill children, these cannot always be extrapolated to children with congenital heart disease. Children with congenital heart disease may also suffer unique circumstances, such as chylothoraces, heart failure, and the need for mechanical circulatory support, which greatly impact nutrition delivery. Guidelines for neonates and children with heart disease continue to be developed. We provide a synthesized narrative review of current literature and considerations for nutrition evaluation and management of critically ill children with congenital heart disease.

Association between enteral feeding and gastrointestinal complications in children receiving extracorporeal life support: A retrospective cohort study

BACKGROUND

Extracorporeal life support is an accepted treatment modality for children with severe cardiac and/or respiratory dysfunction. However, after a period of inadequate gut perfusion, clinicians are often reluctant to initiate enteral nutrition.

METHODS

This was a retrospective cohort study in a single large pediatric intensive care unit in North West England over 5.5 years (2017-2022).

RESULTS

One hundred fifty-six children, who had a median age of 2 months (IQR, 0.3-15) and a mean weight-for-age z score of -1.50 (SD, 1.7), were included. Indications for extracorporeal life support were respiratory failure (31%), cardiac arrest (28%), low cardiac output state (27%), and inability to separate from cardiopulmonary bypass (12%). Most (75%) children were fed during extracorporeal life support, with a median time to initiate feeding of 24 h (IQR, 12.2-42.7). More gastrointestinal complications were associated with being enterally fed (86% vs 14%; P < 0.001), but complications were predominantly feed intolerance (46%), which was associated with receiving formula feeds rather than maternal (breast) milk (P < 0.001). Overall, the proportion of children's median energy targets achieved by 72 h was 38% (IQR, 10.7%-76%), but this varied by support indication.

CONCLUSIONS

Our findings suggest most children tolerated enteral feeding within 24 h after extracorporeal life support initiation, with only mild gastrointestinal complications.

Vasopressors and Enteral Nutrition in the Survival Rate of Children During Extracorporeal Membrane Oxygenation

OBJECTIVES

Nutrition support is essential in improving outcome and survival in children on extra corporal membranous support (ECMO). We aim to evaluate the association between the timing of enteral nutrition (EN) initiation and its impact on outcome.

METHODS

We retrospectively reviewed the electronic health records of children (≤18 years) from November 2014 to November 2019 who were on veno-arterial ECMO for ≥48 hours. Abstracted data included demographics, ECMO indication and duration, timing of EN initiation, change in weight-for-age z score (WAZ), and survival rate. The vasoactive-inotropic score (VIS) was calculated to assess illness acuity.

RESULTS

We identified 76 children with median age (interquartile range [IQR]) of 0.3 years (0-2.6), 46 of which were infants (59%) who required ECMO for a median (IQR) of 10 days (6-22). Thirty-six (47%) survived to hospital discharge. EN was initiated in 55 (72%) of patients while on ECMO. EN initiation by day 3 of ECMO was positively associated with survival ( P = 0.0438). VIS at the time of EN initiation was lower in surviving infants ( P = 0.022). Children who achieved enteral autonomy were more likely to survive ( P = 0.0024). Survivors had greater WAZs at ECMO completion ( P = 0.0004).

CONCLUSIONS

Initiation of EN by day 3 of ECMO and at a lower VIS is associated with greater likelihood of survival.

Nutrition during extracorporeal life support: A review of pathophysiological bases and application of guidelines

BACKGROUND

Patients on extracorporeal life support (ECLS), either for respiratory or cardiac support, are at high risk of malnutrition; guidelines on nutrition in critical care have not incorporated solid evidence regarding these settings. The aim of this narrative review is to gather the available evidence in the existing literature and transpose general principles to the ECLS population.

METHODS

A literature review of observational and interventional studies on nutrition during ECLS, and evaluation of nutrition guidelines in this perspective.

RESULTS

Nutrition is paramount for improving outcomes in ECLS, as well as in critically ill patients. The caloric needs during ECLS can vary according to the severity of the clinical state, sedation, paralysis, and temperature stability. Precise evaluation of energy expenditure by indirect calorimetry is difficult because ECLS is a system dedicated to removing carbon dioxide; however, modified equations composed of carbon dioxide values taken from the membrane lung are available. Guidelines suggest starting early enteral nutrition (EN) with a hypocaloric (70%-80% of the needs) strategy, also in acute states such as septic or cardiogenic shock. Moreover, EN, despite previous concerns, is feasible in prone position, an increasingly adopted strategy during mechanical ventilation. The catabolic state is maximal in these patients, causing a protein and muscular reduction. Therefore, adequate protein delivery should be guaranteed by administering a high protein intake of up to 2 g/kg/day.

CONCLUSIONS

Studies on nutrition tailored to ECLS patients are warranted. Early hypocaloric EN with high protein intake, tailored on indirect calorimetry, may be the most appropriate option.

Early Enteral Nutrition and Gastrointestinal Complications in Pediatric Patients on Extracorporeal Membrane Oxygenation

OBJECTIVES

To assess the safety of enteral nutrition (EN) in children on extracorporeal membrane oxygenation (ECMO). To describe nutritional status and the characteristics of the nutritional support in this population.

METHODS

A retrospective single-center analysis (2006-2016) including children <18 years on ECMO. Demographic data, nutritional status, characteristics of nutritional support, and development of gastrointestinal (GI) complications were recorded.

RESULTS

One hundred children, with a median age of 9.7 months (interquartile range [IQR] 3.9-63.1) were enrolled. Undernutrition was prevalent among children on ECMO (33.3%) mainly in patients <2 years (P = 0.042). Most patients (64%) received EN at some point during ECMO therapy. EN was administered in the first 48 hours after ECMO initiation (48HEN) to 60.3% of the children.Mortality rate in the Pediatric Intensive Care Unit was lower in patients who received EN as the initial artificial nutrition support (ANS) (37.7 vs 51%, P = 0.005) and in children on 48HEN (34% vs 50%, P = 0.04). In the logistic regression analysis, duration of ECMO support and low cardiac output indication were the only factors associated with mortality.Although most patients on ECMO (45%) developed digestive complications, they were mostly mild, being constipation the most prevalent. In the logistic regression analysis, EN was not associated with an increase in GI complications (P = 0.09). Only three patients developed intestinal ischemia (one without EN and two on EN).

CONCLUSIONS

Undernutrition is prevalent among children on ECMO, mainly in infants <2 years. EN is not associated with severe gastrointestinal complications or higher mortality in these children.

Extracorporeal Life Support Organization (ELSO): Guidelines for Pediatric Cardiac Failure

These guidelines are applicable to neonates and children with cardiac failure as indication for extracorporeal life support. These guidelines address patient selection, management during extracorporeal membrane oxygenation, and pathways for weaning support or bridging to other therapies. Equally important issues, such as personnel, training, credentialing, resources, follow-up, reporting, and quality assurance, are addressed in other Extracorporeal Life Support Organization documents or are center-specific.

Pediatric and neonatal extracorporeal life support: current state and continuing evolution

The use of extracorporeal life support (ECLS) for the pediatric and neonatal population continues to grow. At the same time, there have been dramatic improvements in the technology and safety of ECLS that have broadened the scope of its application. This article will review the evolving landscape of ECLS, including its expanding indications and shrinking contraindications. It will also describe traditional and hybrid cannulation strategies as well as changes in circuit components such as servo regulation, non-thrombogenic surfaces, and paracorporeal lung-assist devices. Finally, it will outline the modern approach to managing a patient on ECLS, including anticoagulation, sedation, rehabilitation, nutrition, and staffing.

Nutritional support for children during critical illness: European Society of Pediatric and Neonatal Intensive Care (ESPNIC) metabolism, endocrine and nutrition section position statement and clinical recommendations

Background

Nutritional support is considered essential for the outcome of paediatric critical illness. There is a lack of methodologically sound trials to provide evidence-based guidelines leading to diverse practices in PICUs worldwide. Acknowledging these limitations, we aimed to summarize the available literature and provide practical guidance for the paediatric critical care clinicians around important clinical questions many of which are not covered by previous guidelines.

Objective

To provide an ESPNIC position statement and make clinical recommendations for the assessment and nutritional support in critically ill infants and children.

Design

The metabolism, endocrine and nutrition (MEN) section of the European Society of Pediatric and Neonatal Intensive Care (ESPNIC) generated 15 clinical questions regarding different aspects of nutrition in critically ill children. After a systematic literature search, the Scottish Intercollegiate Guidelines Network (SIGN) grading system was applied to assess the quality of the evidence, conducting meta-analyses where possible, to generate statements and clinical recommendations, which were then voted on electronically. Strong consensus (> 95% agreement) and consensus (> 75% agreement) on these statements and recommendations was measured through modified Delphi voting rounds.

Results

The final 15 clinical questions generated a total of 7261 abstracts, of which 142 publications were identified relevant to develop 32 recommendations. A strong consensus was reached in 21 (66%) and consensus was reached in 11 (34%) of the recommendations. Only 11 meta-analyses could be performed on 5 questions.

Conclusions

We present a position statement and clinical practice recommendations. The general level of evidence of the available literature was low. We have summarised this and provided a practical guidance for the paediatric critical care clinicians around important clinical questions.

Electronic supplementary material

The online version of this article (10.1007/s00134-019-05922-5) contains supplementary material, which is available to authorized users.

Controversies of enteral nutrition in select critically-ill surgical patients: Traumatic brain injury, extracorporeal life support, and sepsis

Adequate nutritional support for critically ill pediatric patients is an essential component of optimal care in the intensive care unit. For select patient populations in this setting, the enteral delivery of nutrients can bring unique challenges and potential risks. The focus of this paper is to provide a review of existing literature concerning the safety, efficacy and benefits of enteral nutrition in select surgical patient populations for whom these discussions are most controversial: patients with traumatic brain injury, patients receiving extracorporeal life support (ECLS), and patients receiving vasopressor therapy, such as in sepsis. Recommendations in the context of consensus or a call to investigate research gaps are provided based on a review of the evidence.

The Role and Impact of Extracorporeal Membrane Oxygenation in Critical Care

Use of extracorporeal membrane oxygenation (ECMO) has been exponentially increasing over the last decade and is now considered a mainstream lifesaving treatment modality in critical care medicine. However, the need for physician education, training, and experience remains imperative. Although ECMO has traditionally been used in end-stage lung disease and circulatory collapse, it is being adopted for use in right heart failure, as a bridge to heart and lung transplantation, and as rescue therapy for both sepsis and post-organ transplantation. The following article discusses indications, management, complications, and challenges of ECMO as well as our experience at the Houston Methodist DeBakey Heart & Vascular Center.

Nutrition Support During Pediatric Extracorporeal Membrane Oxygenation

Providing adequate nutrition to critically ill pediatric patients is essential and positively impacts outcomes. Critically ill infants and children receiving extracorporeal membrane oxygenation (ECMO) therapy are nutritionally vulnerable, yet there are challenges to reliable assessment of nutrition requirements and to the delivery of optimal nutrition in this cohort. In this review of the relevant literature, we present the current evidence and guidelines for the optimal prescription and delivery of nutrition for pediatric patients receiving ECMO. We also discuss nutrient delivery considerations in ECMO survivors and identify areas where further study is needed.

Neonatal Extracorporeal Life Support: A Review of Nutrition Considerations

Critically ill neonates who require extracorporeal life support have particular nutrition needs. These infants require prescription of aggressive, early nutrition support by knowledge providers. Understanding the unique metabolic demands and nutrition requirements of these fragile patients is paramount, particularly if additional therapies such as aggressive diuretic regimens or continuous renal replacement therapy are used concurrently. Although the American Society for Parenteral and Enteral Nutrition has published guidelines for this population, a review of each nutrition component is warranted because few studies exist specific to this population. Long-term complications in survivors of neonatal extracorporeal life support, particularly in patients with select diagnoses such as congenital diaphragmatic hernia, can be significant and must be recognized and anticipated. This review focuses on recognizing the nutrition needs of neonatal patients requiring extracorporeal life support, appraising the available data to guide selection of an appropriate mode of nutrition delivery, and describing the anticipated long-term nutrition implications of extracorporeal life support provision during the neonatal period.

Nutritional practices and adequacy in children supported on extracorporeal membrane oxygenation

BACKGROUND AND AIMS

Use of extracorporeal membrane oxygenation (ECMO) in children is increasing. Yet, little is known about optimal nutritional practices in these children. We aim to describe the nutritional adequacy, factors associated with enteral nutrition, and the association between nutritional adequacy and mortality in children supported on ECMO.

METHODS

We conducted a retrospective review of all children (1 month-18 years) requiring ECMO between 2010 and 2016. Data on enteral and parenteral energy and protein intake in the first 7 days of ECMO were collected. Adequacy of nutrition intake was defined as total intake vs. total requirements, expressed as a percentage.

RESULTS

51 patients were included, of which 43 (84.3%) were supported on veno-arterial ECMO. Median ECMO duration was 8.6 days [interquartile range (IQR) 6.1-16.2]. Overall energy and protein adequacy across the first 7 days of ECMO were 48.3% (IQR 28.0-67.4) and 44.8% (IQR 26.9-67.0) respectively. Parenteral nutrition provided majority of calories [median 88.0% (IQR 62.9-100)] and protein [median 91.0% (IQR 62.3-100)] intake. Enteral nutrition (EN) was initiated in 33 (64.7%) patients. Time to EN initiation, vasoactive-inotropic score just before ECMO initiation, veno-arterial ECMO mode and continuous renal replacement therapy in the first week of ECMO were factors associated with EN energy adequacy. Hospital mortality rate was 55% (28/51). Compared to survivors, non-survivors had lower adequacy of EN energy intake [0.5% (IQR 0-4.4) vs. 11.8% (IQR 0-24.5), p = 0.034]. After correcting for ECMO duration, need for continuous renal replacement therapy and number of vasoactive drugs required on ECMO, greater EN energy adequacy remained associated with lower risk of mortality [adjusted odds ratio 0.93 (95% confidence interval: 0.86-0.99), p = 0.048].

CONCLUSIONS

Nutritional adequacy, especially that of EN, remains low in children supported on ECMO. EN energy adequacy was found to be associated with lower mortality. Further studies on nutritional adequacy in pediatric ECMO, as well as strategies to optimize EN in these children, are warranted.

Medication Complications in Extracorporeal Membrane Oxygenation

The need for extracorporeal membrane oxygenation (ECMO) therapy is a marker of disease severity for which multiple medications are required. The therapy causes physiologic changes that impact drug pharmacokinetics. These changes can lead to exposure-driven decreases in efficacy or increased incidence of side effects. The pharmacokinetic changes are drug specific and largely undefined for most drugs. We review available drug dosing data and provide guidance for use in the ECMO patient population.

Extracorporeal Life Support in Pediatric and Neonatal Critical Care: A Review

Extracorporeal life support (ECLS) is a modified form of cardiopulmonary bypass used to provide prolonged tissue oxygen delivery in patients with respiratory and/or cardiac failure. The first large-scale success of ECLS was achieved in the management of term newborns with respiratory failure. ECLS has become an accepted therapeutic modality for neonates, children, and adults who have failed conventional therapy and in whom cardiac and/or respiratory insufficiency is potentially reversible. The use of ECLS allows one to reduce other cardiopulmonary supports and apply a gentle ventilation strategy in a population of severely compromised critical care patients. ECLS has now been employed in more than 26,000 neonatal and pediatric patients with an overall survival rate of 68%. ECLS has evolved significantly over 25 years of clinical practice; patient selection for this complex and highly invasive therapy, as well as how ECLS is employed in different patient groups, is constantly changing. Generally, ECLS is used more liberally now than in the past. The number of patients requiring this support, however, is declining yearly, and those patients who receive ECLS compose a more severe subset of an intensive care population. This review provides an overview of the development of ECLS and the equipment and techniques employed. The use of ECLS for neonatal respiratory failure, pediatric respiratory failure, and cardiac support are outlined. Management of the ECLS patient is discussed in detail, and outcome of these patients is reviewed. Finally, current trends and future implications of ECLS in neonatal and pediatric critical care are addressed.

Enteral nutrition in neonatal and pediatric extracorporeal life support: a survey of current practice

PURPOSE

The purpose of this study was to characterize enteral (EN) nutrition practices in neonatal and pediatric patients receiving extracorporeal life support (ECLS).

METHODS

A Web-based survey was administered to program directors and coordinators of Extracorporeal Life Support Organization centers providing neonatal and pediatric ECLS. The survey assessed patient and clinical factors relating to the administration of EN.

RESULTS

A total of 122 responses (122/521, 23.4%) from 96 institutions (96/187; 51.3%) were received. One hundred fifteen provided neonatal or pediatric ECLS, and 84.2% reported utilizing EN during ECLS. 55% and 71% of respondents provide EN 'often' or 'always' for venoarterial and venovenous ECLS, respectively. EN was reported as given 'often' or 'always' by 24% with increased vasopressor support, 53% with "stable" vasopressor support, and 60% with weaning of vasopressor support. Favorable diagnosis for providing EN includes respiratory distress syndrome, pneumonia, asthma, trauma/post-operative, pulmonary hemorrhage, and infectious cardiomyopathy. Vasopressor requirement and underlying diagnosis were the primary or secondary determinant of whether to provide EN 81% and 72% of the time. 38% reported an established protocol for providing EN.

CONCLUSION

EN support is common but not uniform among neonatal and pediatric patients receiving ECLS. ECLS mode, vasopressor status, and underlying diagnosis play an important role in the decision to provide EN.

Impact of early enteral versus parenteral nutrition on mortality in patients requiring mechanical ventilation and catecholamines: study protocol for a randomized controlled trial (NUTRIREA-2)

Background

Nutritional support is crucial to the management of patients receiving invasive mechanical ventilation (IMV) and the most commonly prescribed treatment in intensive care units (ICUs). International guidelines consistently indicate that enteral nutrition (EN) should be preferred over parenteral nutrition (PN) whenever possible and started as early as possible. However, no adequately designed study has evaluated whether a specific nutritional modality is associated with decreased mortality. The primary goal of this trial is to assess the hypothesis that early first-line EN, as compared to early first-line PN, decreases day 28 all-cause mortality in patients receiving IMV and vasoactive drugs for shock.

Methods/Design

The NUTRIREA-2 study is a multicenter, open-label, parallel-group, randomized controlled trial comparing early PN versus early EN in critically ill patients requiring IMV for an expected duration of at least 48 hours, combined with vasoactive drugs, for shock. Patients will be allocated at random to first-line PN for at least 72 hours or to first-line EN. In both groups, nutritional support will be started within 24 hours after IMV initiation. Calorie targets will be 20 to 25 kcal/kg/day during the first week, then 25 to 30 kcal/kg/day thereafter. Patients receiving PN may be switched to EN after at least 72 hours in the event of shock resolution (no vasoactive drugs for 24 consecutive hours and arterial lactic acid level below 2 mmol/L). On day 7, all patients receiving PN and having no contraindications to EN will be switched to EN. In both groups, supplemental PN may be added to EN after day 7 in patients with persistent intolerance to EN and inadequate calorie intake. We plan to recruit 2,854 patients at 44 participating ICUs.

Discussion

The NUTRIREA-2 study is the first large randomized controlled trial designed to assess the hypothesis that early EN improves survival compared to early PN in ICU patients. Enrollment started on 22 March 2013 and is expected to end in November 2015.

Trial registration

ClinicalTrials.gov Identifier: NCT01802099 (registered 27 February 2013)

Video Fluoroscopy Swallow Study and Nutritional Support During Ambulatory Venovenous Extracorporeal Membrane Oxygenation as a Bridge to Lung Transplantation

We present the successful completion of a video fluoroscopy swallow study and subsequent nutritional plan of a child bridged to lung transplantation with ambulatory venovenous (VV) extracorporeal membrane oxygenation (ECMO). With a limited number of programs bridging pediatric patients to lung transplantation with VV ECMO, a better understanding of nutritional support is needed to provide optimal care to this patient population awaiting organ donation.

Avoidable causes of delayed enteral nutrition in critically ill children

To evaluate the incidence of delayed enteral nutrition (EN) and identify avoidable causes of delay, we retrospectively reviewed medical records of 200 children (median age [range]; 37.5 [1-216] months) who stayed in the intensive care unit (ICU) for a minimum of 3 days. Among 200 children, 115 received EN following ICU admission with a median time of EN initiation of 5 days after admission. Of these, only 22 patients achieved the estimated energy requirement. A significant decrease in the final z score of weight for age from the initial assessment was observed in the non-EN group only (-1.3±2.17 to -1.57±2.35, P<0.001). More survivors than non-survivors received EN during their ICU stay (61.2% vs 30.0%, P=0.001) and received EN within 72 hr of ICU admission (19.8% vs 3.3%, P=0.033). The most common reason for delayed EN was gastrointestinal (GI) bleeding, followed by altered GI motility and hemodynamic instability. Only eight cases of GI bleeding and one case of altered GI motility were diagnosed as active GI bleeding and ileus, respectively. This study showed that the strategies to reduce avoidable withholding EN are necessary to improve the nutrition status of critically ill children.

Medical and nursing care of the child on mechanical circulatory support

OBJECTIVES

To review the medical and nursing care of children receiving mechanical circulatory support as part of the Pediatric Cardiac Intensive Care Society/Extracorporeal Life Support Organization Joint Statement on Mechanical Circulatory Support. DATA SOURCES/STUDY SELECTION/DATA EXTRACTION/DATA SYNTHESIS: This is a general review of current issues of medical and nursing care of children on mechanical circulatory support. It consists of knowledge gained from practical experience combined with supporting evidence and/or discussion of controversies for which evidence exists or is inconclusive. The scope of this review includes assessment and monitoring, cardiovascular, pulmonary, and renal and fluid management, as well as infection prevention and treatment, neurological, and nutritional considerations. Physical and psychological care is discussed, as well as ethical and practical issues regarding termination of support.

CONCLUSIONS

There are unique aspects to the medical and nursing care of a patient requiring mechanical circulatory support. Preserving the possibility for cardiac recovery when possible and preventing damage to noncardiac organs are essential to maximizing the probability that patients will have quality survival following support with a mechanical circulatory support device.

Extracorporeal membrane oxygenation promotes long chain fatty acid oxidation in the immature swine heart in vivo

Extracorporeal membrane oxygenation (ECMO) supports infants and children with severe cardiopulmonary compromise. Nutritional support for these children includes provision of medium- and long-chain fatty acids (FAs). However, ECMO induces a stress response, which could limit the capacity for FA oxidation. Metabolic impairment could induce new or exacerbate existing myocardial dysfunction. Using a clinically relevant piglet model, we tested the hypothesis that ECMO maintains the myocardial capacity for FA oxidation and preserves myocardial energy state. Provision of 13-Carbon labeled medium-chain FA (octanoate), long-chain free FAs (LCFAs), and lactate into systemic circulation showed that ECMO promoted relative increases in myocardial LCFA oxidation while inhibiting lactate oxidation. Loading of these labeled substrates at high dose into the left coronary artery demonstrated metabolic flexibility as the heart preferentially oxidized octanoate. ECMO preserved this octanoate metabolic response, but also promoted LCFA oxidation and inhibited lactate utilization. Rapid upregulation of pyruvate dehydrogenase kinase-4 (PDK4) protein appeared to participate in this metabolic shift during ECMO. ECMO also increased relative flux from lactate to alanine further supporting the role for pyruvate dehydrogenase inhibition by PDK4. High dose substrate loading during ECMO also elevated the myocardial energy state indexed by phosphocreatine to ATP ratio. ECMO promotes LCFA oxidation in immature hearts, while maintaining myocardial energy state. These data support the appropriateness of FA provision during ECMO support for the immature heart.

Clinical severity scores do not predict tolerance to enteral nutrition in critically ill children

The objective of the present study was to analyse whether there is a relationship between the clinical severity at the time of starting transpyloric enteral nutrition (TEN) and the onset of digestive tract complications in critically ill children. Between May 2005 and December 2007, we performed a prospective, observational study with the participation of 209 critically ill children aged between 3 d and 17 years and who received TEN. The characteristics of the nutrition and its tolerance were compared with the paediatric risk of mortality (PRISM), the paediatric index of mortality (PIM) and the paediatric logistic organ dysfunction index (PELOD) at the time of starting the nutrition. Higher PRISM and PELOD scores correlated with a later time of starting enteral nutrition, a longer time to reach the maximum daily energy delivery and a longer duration of the TEN. However, the severity scores did not correlate with the maximum energy delivery achieved. Abdominal distension or excessive gastric residues were observed in 4.7 % of the patients and diarrhoea in 4.3 %. The ability of the severity scores to predict diarrhoea was of 0.67 for PRISM, 0.63 for PELOD and 0.60 for PIM-2.The severity scores were not able to predict other digestive tract complications. Higher scores of clinical severity at the time of starting enteral nutrition correlate with a later initiation of the nutrition, a longer time to reach the maximum energy delivery and a longer duration of TEN. However, their ability to predict digestive tract complications is low.

Ventilation strategies and adjunctive therapy in severe lung disease

Respiratory failure caused by severe lung disease is a common reason for admission to the pediatric and neonatal intensive care units. Efforts to decrease morbidity and mortality have fueled investigations into innovative methods of ventilation, kinder gentler ventilation techniques, pharmacotherapeutic adjuncts, and extracorporeal life support modalities. This article discusses the rationale for and experience with some of these techniques.

Early transpyloric enteral nutrition in critically ill children

OBJECTIVE

We compared the tolerance of early (within the first 24 h after admission to the pediatric intensive care unit) and late transpyloric enteral nutrition in critically ill children.

METHODS

We performed a prospective observational study including all critically ill children fed using transpyloric enteral nutrition. The clinical characteristics, energy intake, tolerance, and complications of nutritional delivery between the children with early (first 24 h) and late (after 24 h, range 1-43 d) transpyloric enteral nutrition were compared.

RESULTS

Transpyloric nutrition was started within the first 24 h in 202 (38.5%) of the 526 children. There were no differences in the diagnoses, incidence of organ disturbances, doses of vasoactive drugs, or mortality between the two groups. There were no differences in the maximum number of calories delivered or in the duration of the nutrition between children with early and late transpyloric nutrition. The incidence of abdominal distention was lower in the children receiving early transpyloric nutrition (3.5%) than in those receiving nutrition at a later date (7.8%; P < 0.05). Moreover, 6.3% of patients presented diarrhea, with no difference being found between the two groups.

CONCLUSION

Early transpyloric enteral nutrition is well tolerated in critically ill children and is not associated with an increase in incidence of complications.

Use of a feeding protocol to improve nutritional support through early, aggressive, enteral nutrition in the pediatric intensive care unit

OBJECTIVE

To evaluate the effects of instituting a feeding protocol with inclusive bowel regimen on tolerance and time to accomplish goal feeding in the pediatric intensive care unit.

DESIGN

Retrospective comparison chart review before and after the initiation of a feeding protocol.

PATIENTS

A total of 91 patients in the year 2000, before the initiation of the protocol, who received nasogastric feedings and 93 patients in year 2002 after the protocol was initiated.

MEASURES AND MAIN RESULTS

Patients were selected for review if they received nasogastric tube feedings while in the pediatric intensive care unit. The data were reviewed from time of admission in the pediatric intensive care unit through 7 days of goal feedings or discharge from the pediatric intensive care unit. Data examined included: days in the pediatric intensive care unit and hospital, time to goal feedings, concomitant use of cardiovascular medications, sedation, analgesia, episodes of feedings held, vomiting, diarrhea, and constipation. The protocol group achieved goal nutrition in an average of 18.5 hrs and a median of 14 hrs. The retrospective group achieved goal feedings at an average of 57.8 hrs and a median of 32 hrs (p < .0001). Also noted were a reduction in the percentage of patients vomiting from 20% to 11% and a reduction in constipation from 51% to 33%.

CONCLUSION

This comparison study suggests that the institution of a feeding protocol will not only achieve goal feedings at a substantially reduced time but also improve tolerance of enteral feedings in patients admitted to the pediatric intensive care unit.

Enteral nutrition and oral nutrition supplements: a review of the economics literature

BACKGROUND

We sought to review the economics literature on enteral nutrition (EN) and oral nutrition supplements (ONS) against the background of an ongoing clinical guideline development.

METHODS

We searched the Health Economic Evaluations Database, the NHS Economic Evaluation Database, and the Cochrane Database of Systematic Reviews.

RESULTS

Enteral vs parenteral nutrition was found to be the most common comparison undertaken. The randomized trial evidence suggests that, in some groups of patients, EN is better in terms of clinical endpoints and/or length of hospital stay. This should translate into a lower mean cost for EN, given the reduced daily cost. These studies should be treated with caution because of their small sample size and poor quality. Costing was often crude and poorly reported, tending to focus on the narrow costs of the nutrition supplements. Only 1 study of a nutrition supplement in the community setting was found.

CONCLUSIONS

There is some evidence to indicate economic advantages of enteral over parenteral nutrition and of immune-enhancing supplements relative to control diet. There is a lack of well-designed studies taking a broad view of relevant comparators, costs, and outcomes. The cost-effectiveness of different forms of nutrition in different patient groups remains to be established.

Transpyloric enteral feeding in the postoperative of cardiac surgery in children

PURPOSE

The aim of this study is to assess the utility of transpyloric enteral nutrition in the postoperative period of cardiac surgery in children.

METHODS

A prospective, observational study was performed on children receiving transpyloric enteral nutrition in the postoperative period of cardiac surgery. The type of nutrition, duration, tolerance, and complications were studied.

RESULTS

Children (212) between the ages of 3 days and 17 years received transpyloric enteral nutrition in the postoperative period of cardiac surgery. The duration of the transpyloric feeding was 16 +/- 23.8 days, and the maximum calorie delivery was 85.1 +/- 25.7 kcal/kg/d. Tolerance to nutrition was good and was not affected by the infusion of vasoactive drugs, sedatives, or muscle relaxants. Of the study population, 14.6% presented with gastrointestinal complications, 9.4% with abdominal distension and/or excessive gastric residue, and 7.5% with diarrhea. Nutrition was withdrawn in 2.4% of the patients because of gastrointestinal complications. Mortality was not related to any characteristic of the nutrition or to gastrointestinal complications.

CONCLUSIONS

Transpyloric enteral nutrition is useful and is a simple feeding method that enables a high calorie delivery to be provided with few complications in the postoperative period of cardiac surgery in children, including those receiving high doses of sedatives and muscle relaxants.

Routine enteral nutrition in neonates on extracorporeal membrane oxygenation

OBJECTIVES

To evaluate over a 5-yr period the feasibility and tolerance of a protocol of routine enteral nutrition in neonates requiring extracorporeal membrane oxygenation (ECMO).

DESIGN

Retrospective medical chart review.

SETTING

Level III children's hospital, pediatric surgical intensive care unit.

PATIENTS

Neonates treated with venoarterial ECMO (VA-ECMO) between January 1997 and January 2002. Patients with congenital diaphragmatic hernia were excluded.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Charts of all neonates treated with VA-ECMO were reviewed. Feasibility was evaluated by recording the time period needed for enteral nutrition to reach 40% of total fluid intake; tolerance was evaluated by reviewing data on enteral nutrition related morbidity. Sixty-seven of the 77 eligible patients received enteral feeding during ECMO. Thirty-six of these patients (54%) received 40% of total fluid intake as enteral nutrition within a median of 3 (range, 2-4) days. Over the years there was a trend toward an increasing usage of enteral nutrition from 71% to 94% (p = .07). Enteral nutrition was temporarily discontinued in 16 patients, with 14 showing gastric retentions, one showing discomfort, and one showing aspiration. Symptoms of bilious vomiting, blood-stained stool, or abdominal distention were not present.

CONCLUSION

Neonates on ECMO in this series tolerated enteral feeding well and did not show serious adverse effects. Overall, it is our experience that routine use of enteral feeding in critically ill neonates on VA-ECMO is feasible.

Gut hormone profiles in critically ill neonates on extracorporeal membrane oxygenation

OBJECTIVES

The objective of this study was to gain insight into the hormonal responses to enteral nutrition in critically ill newborns requiring venoarterial extracorporeal membrane oxygenation (ECMO) by analyzing plasma gut hormone levels of gastrin, cholecystokinin and peptide-YY in relation to enteral nutrition.

METHODS

In 24 consecutive neonates treated with venoarterial ECMO intestinal hormone secretions were determined by radioimmunoassay at 2-day intervals. Twelve received parenteral nutrition only. In 12 enteral nutrition was introduced later. The findings in these patients were compared with those of 16 measurements in eight non-ECMO treated age-matched controls. Mixed model analysis of variance was used for statistical analysis.

RESULTS

Concentrations of gastrin, cholecystokinin and peptide-YY were significantly higher in ECMO patients receiving enteral nutrition compared with ECMO patients who received parenteral nutrition (62, 3.8 and 59.4 pmol/L versus 46, 3.1 and 34.7 pmol/L, respectively). Overall, plasma hormone levels did not differ from those in age-matched controls.

CONCLUSIONS

Intestinal hormone levels showed normal responses after introduction of enteral feeding, comparable with those in age-matched controls without ECMO. These results do not provide an argument for withholding enteral nutrition even in the most severely ill neonates on venoarterial ECMO.

Nutrición artificial en las unidades de cuidados intensivos pediátricos

OBJECTIVE

To perform an epidemiologic study of artificial nutrition in critically-ill pediatric patients.

PATIENTS AND METHODS

A multicenter, prospective and descriptive study was conducted in 23 Spanish intensive care units (ICU) (18 pediatric ICUs and five pediatric/neonatal ICUs) over a 1-month period. Artificial nutrition (AN) was required by 165 critically-ill patients (21.4 %). Data on diagnosis, severity, treatment, type of nutrition administered and complications were analyzed.

RESULTS

A total of 54.4 % of the participants were younger than 1 year, 19.4 % were aged between 1 and 5 years old, 15.7 % between 5 and 10 years old and 13.4 % were older than 10 years. ICU mean length stay was 11 days. One hundred six patients were administered enteral nutrition (EN): 67.9 % continuous nasogastric EN, 27.4 intermittent nasogastric EN, 16 % nasojejunal EN, 2.8 % gastrostomy EN. Eighty patients required parenteral nutrition (PN): 86.3 % central PN, 20 % peripheral PN. No significant differences were found between patients with EN and PN in mean energy intake, days receiving AN, diagnosis at admission to the ICU, disease severity (measured by PRISM III) or intensive support techniques. The EN group required greater inotropic support. Patients undergoing mechanical ventilation had equal mortality independent of the type of AN. The most common complications in EN were: 17.9 % emesis, 13.2 % abdominal distension, 11.3 % diarrhea, 4.7 % gastric residual volumes, and 6.6 % hypokalemia. In PN complications consisted of: 5 % catheter related infection, 1.3 % thrombophlebitis, 7.5 % hyponatremia, 3.8 % hypoglycemia, 6.3 % hypophosphatemia and 3.8 % hypertriglyceridemia.

CONCLUSIONS

EN provides critically-ill children with adequate energy intake and is well tolerated. Therefore, if there are no contraindications, EN should be the system of choice in the critically-ill patient requiring AN.

Evaluation of Gastric pH and Guaiac Measurements in Neonates Receiving Acid Suppression Therapy During Extracorporeal Membrane Oxygenation

STUDY OBJECTIVES

To assess gastric pH measurements, evaluate the frequency of guaiac-positive gastric aspirates, and characterize the appearance of gastric aspirates in neonates receiving acid suppression therapy during extracorporeal membrane oxygenation (ECMO).

DESIGN

Retrospective, observational study.

SETTING

Intensive care unit in a 225-bed tertiary care pediatric referral hospital.

SUBJECTS

Thirteen neonates receiving ECMO.

MEASUREMENTS AND MAIN RESULTS

Gastric pH measurements, guaiac test results, appearance of gastric aspirates, and ranitidine and antacid dosing were recorded. On ECMO day 1, mean+/-SD gastric pH was 4.3+/-2.8 in the five neonates whose pH was documented. Intravenous ranitidine 2.9+/-0.4 mg/kg/day was started in all neonates by ECMO day 2. Gastric pH was less than 4.0 in seven neonates; these low pH values accounted for only 10% of gastric pH measurements. The frequency of positive guaiac results in neonates with pH measurements below 4.0 was 27% compared with 41% for neonates with a gastric pH of 4.0 or greater (p=0.125). Guaiac tests were positive in 69 (42%) aspirates in 11 neonates. Of the guaiac-positive aspirates that had a corresponding pH measurement, 94% had a pH of 4.0 or greater. Guaiac-positive aspirates had evidence of bile (49%), antacid (17%), and blood (7%) in gastric fluid. In six patients, ranitidine dosages were increased to 3.9+/-0.6 mg/kg/day due to low pH and/or positive guaiac results. In two of these neonates, gastric pH remained below 4.0 in nine of 35 pH measurements despite increased ranitidine dosing. Guaiac results remained positive in all subsequent aspirates in five out of six of these neonates. No neonates developed clinically significant upper gastrointestinal bleeding (UGIB).

CONCLUSIONS

Gastric pH is variable in neonates receiving histamine2-receptor antagonist and antacid therapy during ECMO, and gastric pH of 4.0 or greater does not decrease the frequency of guaiac-positive aspirates. Higher gastric pH measurements are confounded by duodenogastric reflux and the presence of blood and/or antacid in gastric fluid. Motility agents in combination with acid suppression therapy for prevention of UGIB may be necessary in this setting based on gastric pH measurements, appearance of gastric aspirates, and guaiac testing.

Barriers to adequate nutrition in critically ill children

OBJECTIVE

The study assessed the adequacy of nutrition support in critically ill infants and children and identifies barriers impeding the delivery of estimated energy requirement (EER).

METHODS

Forty-two children (median age, 6.6 mo; range, 0-198) who were admitted to a tertiary-level pediatric intensive care unit (PICU) were studied prospectively over a 6-mo period. Patients staying in the PICU longer than a full 3 d and who received enteral or a combination of enteral and parenteral nutrition were eligible for inclusion. Patients were assigned to one of two groups: patients after cardiac surgery (n = 18) and all other diagnoses (n = 24). EERs were compared with actual energy intake, and clinical information was collected throughout the PICU admission.

RESULTS

Patients in the PICU received a median of 37.7% (range, 0.2-130.2%) of their EERs. The cardiac group achieved significantly lower energy intakes than did the non-cardiac group (P = 0.02). Only 22 of 42 patients (52%) achieved full EERs at any time during their admission, and this was more likely in non-cardiac patients (67% versus 33%, P = 0.03) Children undergoing cardiac surgery had a significant fall in weight-for-age Z scores (WAZ) from PICU admission to discharge (median WAZ, -1.44 versus -2.14; P < 0.001). In both groups, the major barrier to achieving EER was fluid volume restriction. Interruption of feeding for procedures and feeding intolerance reduced energy intake to a lesser degree.

CONCLUSIONS

This study highlights the inadequacy of nutrition support in critically ill children in the PICU. Restriction of fluid intake was the main barrier to the delivery of adequate nutrition, particularly in infants undergoing cardiac surgery.

Extracorporeal life support for posttraumatic acute respiratory distress syndrome at a children's medical center

BACKGROUND

Primary traumatic injury was considered previously a contraindication for institution of extracorporeal life support because of high risk for persistent or new bleeding. Published experience in adults suggests that extracorporeal membrane oxygenation (ECMO) can successfully support trauma victims with pulmonary failure. The authors reviewed their experience with the use of ECMO in pediatric and adult trauma patients with acute respiratory distress syndrome (ARDS) at a children's medical center.

METHODS

ECMO Center records from 1991 through 2001 (76 children, 8 adults) were reviewed to identify all patients with a primary or secondary ICD-9 diagnostic code of posttraumatic ARDS in addition to documented trauma.

RESULTS

Five children and 3 adults with traumatic injury and ARDS received ECMO support. Seven patients were injured in motor vehicle collisions; one patient suffered a gunshot wound to the chest. Patient ages ranged from 21 months to 29 years (pediatric median, 4 years; range, 21 months to 18 years). Four patients had pre-ECMO laparotomies, including 3 who required splenectomy. Four patients had liver lacerations, 3 had pulmonary contusions, and 1 had a renal contusion. Median ventilation before ECMO was 6 days (range, 2 to 10). Seven of 8 patients were placed on venovenous (VV) ECMO. Seven patients had significant bleeding on ECMO. Patients were treated with blood product replacement, epsilon-aminocaproic acid (EACA), and aprotinin infusions. Surgical intervention was not required for bleeding. Six patients received hemofiltration. Median time on ECMO was 653 hours (range, 190 to 921 hours). Six of 8 patients overall survived (75%). Four of 5 pediatric patients survived.

CONCLUSIONS

Children and adults with severe posttraumatic ARDS can be treated successfully on VV extracorporeal support. Hemorrhage occurs frequently but is manageable.

[Transpyloric enteral nutrition in critically-ill children (II): complications]

OBJECTIVE

To study tolerance to transpyloric enteral nutrition (TEN) and the incidence of secondary complications in critically-ill children.

PATIENTS AND METHODS

We performed a prospective, observational study between 1994 and 2002 of all critically-ill children admitted to our pediatric intensive care unit who received TEN. Tolerance and complications were analyzed.

RESULTS

Of 286 patients aged between 3 days and 17 years who received TEN, gastrointestinal complications occurred in 13.6 %, abdominal distention and/or excessive gastric residue in 8 % and diarrhea in 6.3 %. Diarrhea was associated with shock (p 0.01), abdominal distension and/ or excessive gastric residue (p 0.008), hypophosphatemia (p 0.001), and duration of TEN (p < 0.001). TEN was discontinued in 2.1 % of the patients because of gastrointestinal complications. Thirty-two patients (11.2 %) died during TEN. No relationship was found between the characteristics of nutrition and complications and mortality.

CONCLUSIONS

TEN is a well tolerated method of nutrition in critically-ill children that produces few complications.

[Transpyloric enteral nutrition in critically-ill children (I): technic and indications]

OBJECTIVE

To study the utility and efficacy of transpyloric enteral nutrition (TEN) in critically-ill children by analyzing the factors that determine enteral tolerance.

PATIENTS AND METHODS

We performed a prospective, observational study between 1994 and 2002 of all critically-ill children admitted to our pediatric intensive care unit who received TEN. The indications for enteral nutrition, type of nutrition and its duration were studied.

RESULTS

A total of 286 patients (8.4 % of patients admitted to the PICU in the study period), aged between 3 days and 17 years received TEN. Fifty-five children (19.2 %) were aged less than 1 month and 165 (27.7 %) were aged less than 6 months. Seventy percent received TEN exclusively. The most frequent indication for TEN was mechanical ventilation in 255 children (89.2 %). One hundred seventy-six patients (61.5 %) received TEN in the postoperative period after cardiac surgery. The mean duration of TEN was 15.4 25 days, the maximum volume of nutrition was 118.7 41 ml/kg/day, and the maximum caloric intake was 88.6 26.7 kcal/kg/day. During TEN, 227 patients received sedation (79.3 %), and 124 were administered muscle relaxants (43.3 %), with no increase in complications.

CONCLUSIONS

TEN is a useful method of nutrition in critically-ill children.

Primary use of the venovenous approach for extracorporeal membrane oxygenation in pediatric acute respiratory failure

OBJECTIVES

To describe a single center's experience with the primary use of venovenous cannulation for supporting pediatric acute respiratory failure patients with extracorporeal membrane oxygenation (ECMO).

DESIGN

Retrospective chart review of all patients receiving extracorporeal life support at a single institution.

SETTING

Pediatric intensive care unit at a tertiary care children's hospital.

PATIENTS

Eighty-two patients between the ages of 2 wks and 18 yrs with severe acute respiratory failure.

INTERVENTIONS

ECMO for acute respiratory failure.

MEASUREMENTS AND MAIN RESULTS

From January 1991 until April 2002, 82 pediatric patients with acute respiratory failure were cannulated for ECMO support. Median duration of ventilation before ECMO was 5 days (range, 1-17 days). Sixty-eight of these patients (82%) initially were placed on venovenous ECMO. Fourteen patients were initiated and remained on venoarterial support, including six in whom venovenous cannulae could not be placed. One patient was converted from venovenous to venoarterial support due to inadequate oxygenation. Venoarterial patients had significantly greater alveolar-arterial oxygen gradients and lower PaO(2)/FIO(2) ratios than venovenous patients (p <.03). Fifty-five of 81 venovenous patients received additional drainage cannulae (46 of 55 with an internal jugular cephalad catheter). Thirty-five percent of venovenous patients and 36% of venoarterial patients required at least one vasopressor infusion at time of cannulation (p = nonsignificant); vasopressor dependence decreased over the course of ECMO in both groups. Median duration on venovenous ECMO for acute hypoxemic respiratory failure was 218 hrs (range, 24-921). Venovenous ECMO survivors remained cannulated for significantly shorter time than nonsurvivors did (median, 212 vs. 350 hrs; p =.04). Sixty-three of 82 ECMO (77%) patients survived to discharge-56 of 68 venovenous ECMO (81%) and nine of 14 venoarterial ECMO (64%).

CONCLUSIONS

Venovenous ECMO can effectively provide adequate oxygenation for pediatric patients with severe acute respiratory failure receiving ECMO support. Additional cannulae placed at the initiation of venovenous ECMO could be beneficial in achieving flow rates necessary for adequate oxygenation and lung rest.

Erythromycin and early enteral nutrition in mechanically ventilated patients

OBJECTIVE

To determine whether erythromycin facilitates early enteral nutrition in mechanically ventilated, critically ill patients.

DESIGN

Prospective, randomized, placebo-controlled, single-blind trial.

SETTING

General intensive care unit in a university-affiliated general hospital.

PATIENTS

Forty consecutive critically ill patients receiving invasive mechanical ventilation and early nasogastric feeding.

INTERVENTIONS

Patients were assigned randomly to intravenous erythromycin (250 mg/6 hrs; n = 20) or a placebo (intravenous 5% dextrose, 50 mL/6 hrs; n = 20) for 5 days. The first erythromycin or 5% dextrose injection was given at 8 am on the day after intubation. One hour later, a daily 18-hr enteral nutrition regimen via a 14-Fr gastric tube was started. Residual gastric volume was aspirated and measured every day at 9 am, 3 pm, 9 pm, and 3 am. Enteral nutrition was discontinued if residual gastric volume exceeded 250 mL or the patient vomited.

MEASUREMENTS AND MAIN RESULTS

On the first day, residual gastric volume was smaller in the erythromycin than in the placebo group (3 pm, 15 +/- 7 mL vs. 52 +/- 14 mL, p <.05; 9 pm, 29 +/- 15 mL vs. 100 +/- 20 mL, p <.001; 3 am, 11 +/- 4 mL vs. 54 +/- 13 mL, p <.05). With erythromycin, residual gastric volume at 9 pm was smaller on the second day (33 +/- 11 mL vs. 83 +/- 19 mL, p <.01) and residual gastric volume at 3 pm was smaller on the third day (39 +/- 15 mL vs. 88 +/- 19 mL, p <.05) than with placebo. On the fourth and fifth days, the differences in residual gastric volume were not significant. Enteral nutrition was discontinued before the end of the 5-day period in seven of the 20 erythromycin patients and 14 of the 20 placebo patients (p <.001).

CONCLUSION

In critically ill patients receiving invasive mechanical ventilation, erythromycin promotes gastric emptying and improves the chances of successful early enteral nutrition.

Nutritional support in the critically ill child

The nutritional management of a critically ill child is not a glamorous subject and seldom receives the attention that it merits despite increasing evidence that appropriate goal-oriented nutritional support is associated with improved outcome. Current nutritional management is based on rapidly emerging knowledge on the very special nutritional requirements related to the "vastly different metabolic and physiologic characteristics of the hypermetabolic and stressed" critically ill child. There has been significant changes in traditional practice particularly in the area of calorie delivery, amount of macronutrients and route of nutrient delivery in the critically ill child. The critically ill child presents with "greatly disordered nutrient metabolism" and successful nutritional support involves an initial "hypocaloric regime" with a precise mix of carbohydrates, proteins and lipids which need periodic review as the child improves. The therapeutic benefits of minimal enteral feeding (MEF) have been clearly established--MEF being associated with diminished morbidity, infection rates as well as reduced ICU and hospital stays. Immune enhancement has also been shown to be of some benefit in the critically ill but the subject needs further study.

The incidence of septic complications in newborns on extracorporeal membrane oxygenation is not affected by feeding route

PURPOSE

The aim of this study was to compare the effects of enteral and total parenteral feeding on septic complications in neonates on extracorporeal membrane oxygenation (ECMO).

METHODS

Ninety-six neonates were on ECMO between January 1992 and February 1998. Matching for diagnosis and exclusion of neonates with sepsis before ECMO or undergoing surgery on ECMO left 16 enterally fed neonates (cases) and 35 parenterally fed neonates (controls) for analysis. Septic complications were scored using the criteria of the Society of Critical Care Medicine and the American College of Chest Physicians adapted to children.

RESULTS

Both groups were comparable with respect to gestational age, sex, and age at initiation of ECMO. The frequency of septic complications did not differ between cases and controls: no complications, 75% versus 69%; systemic inflammatory response syndrome, 13% versus 6%; bacteremia, 6% versus 14%; sepsis, 6% versus 11%. There were no complications associated with enteral feeding. The ECMO run was significantly longer in the case group (median, 161 v. 111 hours; P =.01) and mortality rate was lower in the case group (0 v. 14%; P =.17).

CONCLUSIONS

Enteral nutrition does not affect the risk of sepsis in neonates on ECMO when compared with total parenteral nutrition. Enteral nutrition is well tolerated and not associated with adverse effects.