What is a step‑by‑step parenteral nutrition (PN) plan for pediatric patients, including newborns, infants, and children?

Step-by-Step Parenteral Nutrition Plan for Pediatric Patients and Newborns

Standard parenteral nutrition (PN) solutions should be used as first-line therapy for most pediatric patients, including very low birth weight (VLBW) premature infants, particularly for short-term use (up to 2-3 weeks), with individualized PN reserved only for metabolically unstable patients or those requiring prolonged therapy. 1

Step 1: Determine PN Indication and Select Formulation Type

Choose Standard vs. Individualized PN

• Use standardized PN formulations for the majority of pediatric and newborn patients, including VLBW premature infants 1
• Multi-chamber bag systems (all-in-one bags containing amino acids, glucose, and lipids in separate chambers) are preferred as they guarantee sterility, longer shelf life, and well-balanced nutritional support 1, 2
• Reserve individualized PN only for:
  • Very sick and metabolically unstable patients with abnormal fluid and electrolyte losses 1
  • Infants and children requiring PN for prolonged periods (>2-3 weeks) 1
  • Patients whose nutritional needs cannot be met by available standard formulations 1

Implement Computer-Assisted Ordering

• Utilize computerized PN prescribing software where available, as it reduces calculation time (from 7.1 to 2.4 minutes), decreases prescription errors (from 56% to 22%), and improves weight gain and nutrient composition 1
• Computer ordering improves energy, protein, calcium, and phosphate delivery while reducing excessive glucose administration 1

Step 2: Initiate PN with Age-Appropriate Macronutrient Doses

Timing of Initiation

• Premature infants <35 weeks gestation and sick term infants typically require full or partial PN immediately 3
• Children and adolescents should receive PN within 7 days or less if enteral nutrition cannot meet energy and nutrient demands, depending on nutritional state and clinical condition 3

Calculate Actual Requirements

• Calculate (do not estimate) the actual amount of PN for neonates, as fluid, nutrient, and energy needs per kg body weight are markedly higher than in older pediatric and adult patients 3
• Premature infants have substantially higher per-kilogram requirements compared to term infants, children, and adults 3

Macronutrient Composition

• Amino acids: Start early to prevent negative nitrogen balance 4
• Glucose: Provide adequate energy while avoiding hyperglycemia 1
• Lipid injectable emulsion (ILE):
  • Use multicomponent oil ILE rather than 100% soybean oil-based ILE, as it reduces stage 3 or higher retinopathy of prematurity (ROP) in preterm infants 4
  • Include lipids in all-in-one formulations for complete nutritional support 1

Step 3: Establish Vascular Access

• Select appropriate central or peripheral venous access based on anticipated duration of PN and osmolarity of solution 5
• Ensure proper line placement and maintenance to minimize infection risk 5

Step 4: Monitor Metabolic and Nutritional Status

Daily Monitoring Requirements

• Order the most suitable standard PN formulation at least once daily based on the infant's current condition 1
• Monitor for metabolic stability, fluid balance, and electrolyte abnormalities 1
• Track weight gain, growth parameters, and biochemical markers 1

Avoid Trivial Adjustments

• Do not make unnecessary adjustments based on clinically irrelevant laboratory results, as computer-based systems may encourage this pitfall 1
• Focus monitoring on clinically significant parameters that affect morbidity and mortality 1

Step 5: Introduce and Advance Enteral Nutrition

Early Enteral Introduction

• Maintain a minimum amount of enteral feed even while on PN to promote pancreatico-biliary secretion and gut mucosal integrity 6
• Breast milk is preferred when available, as it is associated with shorter duration of PN 6
• For infants with short bowel syndrome or feeding intolerance, consider amino acid-based elemental formulas over extensively hydrolyzed formulas 6

Feeding Strategy

• Use continuous enteral nutrition initially in children with short bowel syndrome or feeding intolerance, as it improves enteral tolerance and weight gain 6
• Transition to bolus feeding as soon as possible to promote oral motor skills, provide cyclical hormonal surge, and stimulate gallbladder emptying 6
• Initiate small oral bolus feeds during the day as an adjunct to continuous nighttime feeds to prevent tube-feeding complications and oral hypersensitivity 6

Feed Concentration

• Give enteral feeds at normal concentrations (not diluted) to ensure adequate nutrition without excessive fluid volume 6

Step 6: Wean from Parenteral Nutrition

Weaning Strategy

• Reduce PN in proportion to, or slightly more than, the increase in enteral nutrition 6
• Begin weaning once the child is stabilized with minimized intestinal losses from vomiting and diarrhea 6
• Increase enteral feed volume as soon as any amount is tolerated 6

If Weaning Fails

• Try again more slowly if the chosen weaning strategy fails 6
• Continue to provide adequate total nutrition by adjusting PN to compensate for enteral shortfalls 6

Solid Food Introduction

• Start solids at the usual recommended age for healthy infants when possible 6
• Initially limit to low-allergenic foods (e.g., rice, chicken, carrot), especially if intestinal inflammation is present 6
• Choose foods appropriate for underlying intestinal disease (e.g., low lactose, low long-chain triglyceride fat, or low fiber for short bowel syndrome) 6
• Aim for normal textures for age to promote normal feeding behavior and reduce long-term feeding problems 6

Step 7: Ensure Multidisciplinary Support and Communication

Nutrition Support Team

• Establish well-defined communication channels between prescribing clinicians and pharmacy teams dedicated to PN preparation 1
• Utilize hospital nutrition support teams to decrease risks of stability and compatibility issues 1
• Implement compounding devices to reduce pharmaceutical risks, particularly regarding lipid emulsion stability and calcium-phosphate precipitation 1

Family Involvement

• Encourage maternal bonding through active involvement in feeding and close contact between mother and child 6
• Ensure feeding by mouth is a pleasurable experience for both infant and parent, even if amounts are limited 6
• For tube-dependent children, consider specific treatment programs aimed at establishing full oral feeding 6

Key Safety Considerations

Prevent PN-Associated Complications

• Monitor for PN-associated liver disease (PNALD) through regular liver function tests and alkaline phosphatase levels 1, 4
• Use multicomponent ILE to reduce risk of ROP in preterm infants 4
• Ensure proper calcium and phosphate compatibility to avoid dangerous precipitates 1

Inadequate Substrate Intake

• Avoid inadequate substrate intake in early infancy, as it can cause long-term detrimental effects through metabolic programming and increased risk of illness in later life 3
• Ensure caloric and protein intake goals are achieved early, particularly in premature infants 1

Minimize PN Duration

• Transition to enteral nutrition as quickly as possible to minimize side effects from PN exposure 3
• The goal is complete discontinuation of PN once enteral nutrition adequately meets all nutritional requirements 6