How you can improve the delivery of enteral nutrition in your PICU

Timing of enteral nutrition and parenteral nutrition in the PICU

The timing of nutrition support initiation has the potential to positively impact nutrition and clinical outcomes in infants and children with critical illness. Early enteral nutrition within 24-48 h and attainment of both a 60% energy and protein goal by the end of the first week of pediatric intensive care unit admission are reported to be significantly associated with improved survival in large observational studies. The results of one randomized controlled trial demonstrated increased morbidity in infants and children with critical illness assigned to early vs delayed supplemental parenteral nutrition. Observational studies in this population also suggest increased mortality with exclusive parenteral nutrition and worse nutrition outcomes when parenteral nutrition is delayed. Subsequently, current nutrition support guidelines recommend early enteral nutrition and avoidance of early parenteral nutrition, although the available evidence used to create the guidelines was inadequate to inform bedside nutrition support practice to improve outcomes. These guidelines are limited by the included studies with small numbers and heterogeneity of patients and research design that confound study outcomes and interpretation. This article provides a narrative review of the timing of nutrition support on outcomes in infants and children with critical illness, strategies to optimize timing and adequacy of nutrition support, and literature gaps, including the timing of parenteral nutrition initiation for children with malnutrition and those with contraindications to enteral nutrition and accurate measurement of energy requirements.

Bolus vs Continuous Nasogastric Feeds in Mechanically Ventilated Pediatric Patients: A Pilot Study

BACKGROUND

Malnutrition increases the risk of mortality and morbidity in the pediatric intensive care unit (PICU). Barriers to adequate delivery of enteral nutrition (EN) include hemodynamic instability, feeding interruptions and intolerance, and lack of standardized feeding protocols. The most recent guidelines on nutrition support for the critically ill child describe a paucity of evidence around the best method to deliver EN. There is an untested clinical assumption that bolus gastric feeding (B-GF) in intubated patients is associated with aspiration events, lung injury, and associated morbidity compared with continuous gastric feeding (C-GF). This study compared the effectiveness and safety of C-GF vs B-GF in intubated pediatric patients.

METHODS

We enrolled randomized patients aged 1 month-12 years who were intubated within 24 hours and received EN starting within 48 hours of admission to a C-GF or B-GF group. Goal-directed EN volume and caloric density were increased every 3 and 12 hours, respectively, to target. Feeding interruptions and intolerance events were recorded.

RESULTS

Twenty-five subjects were enrolled (B-GF = 11; C-GF = 14). At 24 hours, B-GF was associated with higher energy and protein delivery (P < 0.007) and was associated with faster time to goal volume (median B-GF = 15 hours; C-GF = 29.5 hours). No aspiration events resulting in additional lung injury were noted for either group (P = 0.866).

CONCLUSIONS

B-GF was associated with superior delivery of EN with a comparable safety profile to C-GF. Further study is needed to compare both EN methods in other PICU populations.

Enteral Nutrition in the PICU: Current Status and Ongoing Challenges

Malnutrition in the critically ill or injured child is associated with increased morbidities and mortality in the pediatric intensive care unit (PICU), whether present upon admission or acquired during the PICU stay. Particular subpopulations such as those with congenital heart disease or severe thermal injury are at highest risk for malnutrition which can worsen with illness progression. A growing body of evidence suggests the presence of a positive association between nutrition support during critical illness and patient outcomes. Enteral nutrition (EN), the preferred route of nutrient delivery, may be a crucial component of care provided in the PICU which modifies the response to critical illness or injury, resulting in improved outcomes. Numerous challenges exist in the delivery of the EN goal in critically ill children. These include accurate assessment of nutrient requirements, hemodynamic instability, feeding intolerance, feeding interruptions, and the lack of a standardized approach to nutrition support. This article describes the current state of the science and challenges related to EN prescription and delivery in the critically ill child. Suggestions for improving EN practice are then presented, in addition to a platform for further research inquiry.

Epidemiology of interruptions to nutrition support in critically ill children in the pediatric intensive care unit

BACKGROUND

Nutrition support is often delayed or interrupted. The aim of this study is to identify reasons for and quantify time spent without nutrition in a mixed medical-surgical-cardiac pediatric intensive care unit (PICU).

METHODS

Data were prospectively collected to describe the patient cohort (anthropometrics and diagnostic category) and nutrition practices (time to nutrition initiation; frequency, duration, and causes of interruptions; and overall caloric intake). Descriptive statistics were used; comparisons of groups were performed using an independent t test and P < .05 as significance.

RESULTS

The mean (standard deviation) time to nutrition initiation was 22.8 (16.6) hours following admission; 35% of patients were initiated after >24 hours. Nutrition was interrupted 1.2 (2.0) times per patient. Time spent without nutrition due to interruptions was 11.6 (23.0) hours, up to 102 hours. Patients spent 42.4% (28.2%) of their median (range) PICU admission of 2.9 days (0.25-39 days) without any form of nutrition. Patients aged 0-6 months had a significantly higher mean number and duration of interruptions (P = .001 and P < .001, respectively) compared with children >6 months. Interruptions due to surgery and planned extubation lasted significantly longer than all other interruptions (P < .001 and P = .001, respectively). Pediatric Risk of Mortality (PRISM) III scores were not correlated with percentage of length of stay spent without nutrition (r = 0.137).

CONCLUSIONS

Prolonged time to nutrition initiation and interruptions in delivery caused pediatric patients to spend a high proportion of admission without nutrition support, preventing most from meeting energy requirements. Further research addressing specific patient outcomes is required to define optimal initiation times and appropriate procedural-specific fasting times.