Management -SWEET
Goals of care
- Maintain nutrition
- Promote adequate nutrition
Glucose homeostasis
- Maintaining glucose homeostasis (blood sugar) >2.6mmol.
- Prevent hypoglycaemia
- Promote glucose homeostasis
- Prevent blood glucose instability
- Risk of hypoglycaemia
Feeding intolerance
- Promote feeding tolerance
- Risk of feeding intolerance
- Prevent feeding intolerance
The goal is to provide adequate nutrition to support growth and development while accommodating the infant’s feeding tolerance.
Ensuring proper nutrition is crucial for the growth and development particularly for the premature infant, it is vital for immune function, and recovery, particularly in infants with increased caloric needs. Low blood sugar levels can be indicative of increased metabolic demands (e.g., from hypothermia or hypoxia). Hydration is also a key component of an infant’s overall wellbeing.
Strategies
Effective strategies to manage glucose homeostasis and nutrition in premature or the hemodynamically unwell infant in the Special Care Nursery are essential to support growth, prevent complications, and promote optimal clinical outcomes
Interventions
Management of glucose homeostasis and nutrition in the SCN involves a range of interventions, including early parenteral nutrition, careful titration of intravenous glucose, enteral feeding advancement, regular monitoring of blood glucose levels, and individualized care plans to support metabolic stability and optimal growth.
Parenteral Nutrition: Use if enteral feeding contraindicated or not tolerated in a hemodynamically unstable infant, adjusting based on laboratory results and clinical needs. Intra venous therapy (IVT) provides necessary nutrients if enteral feeding is not feasible, while enteral feeding supports gastrointestinal development and function. The administer of total parenteral nutrition (TPN), will be prescribed by medical team; mls/kg/day and will depend on infants postnatal age (number of days old). A starting volume on day one is generally 60mg/kg/day to provided adequate calories for an already compromised infant this will be adjusted based on laboratory results and clinical needs
Enteral feeding: Introduced as tolerated in a hemodynamically stable infant, preterm infants may begin with small volumes of breast milk or formula via nasogastric tube (NGT) or orogastric tube (OGT), gradually increasing as tolerated as per medical advice. Milk volumes will be prescribed by medical team; mls/kg/day and will depend on infants postnatal age (number of days old). A starting volume on day one is generally 60mg/kg/day to provided adequate calories (Gardner et al 2021, Kain and Mannix 2023)
Parenteral Nutrition: Insert (by qualified staff member) and maintain IV cannula and commencement of IVT as per medical orders
Insertion and Maintenance:
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- Insertion– assist medical staff
- IV – observe site for signs of phlebitis or irritation as per local guideline
- Administration: ensure correct fluid (TPN) and rate as per medical orders.
- Monitor for signs of fluid imbalances or complications related to IV access.
- FBC- ensure accurate measurement of input and output
- Bloods – monitor electrolytes and blood sugar
Enteral feeding: Insert and maintain the nasogastric tube (NGT) for feeding if the infant is unable to feed orally.
Insertion and Maintenance:
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- Check pH at commencement of shift and ongoing as per local guideline. Monitor tube placement prior to each feed.
- Feeding Administration: Ensure correct administration of feeds via NGT, monitoring for tolerance and complications. Observe feed
- Monitor Feeding Tolerance: Watch for signs of feeding intolerance like abdominal distension, vomiting, gastric aspirates or changes in stool.
- Facilitate skin/skin breast contact if appropriate
- Replace NGT- every 5-6 days or as per local guideline
Monitor Feeding Tolerance: Watch for signs of feeding intolerance such as abdominal distension, vomiting, gastric aspirates or changes in stool.
Facilitate skin/skin breast contact if appropriate in a hemodynamically stable infant
Monitoring bloods: monitor electrolytes and blood sugar as per local policy
Documentation: Record the infant’s input and output, including response to enteral feeding. Note any deviations from normal and escalate accordingly
(Gardner et al 2021, Kain and Mannix 2023)
Evaluation
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- Monitor weight gain (day 3 then weekly) more frequently if concerns, generally aim for 15-30 grams/day weight gain or as per local policy
- Fluid balance chart (input and output) Urine output 2mls/kg/hr
- Feeding tolerance observed (observe for feed intolerance vomiting, abdominal distension loose water stools, gastric aspirates, bile).
- Hydration status and nutritional markers are normal.
- Adjust feeding methods and volumes based on tolerance and growth parameters
- Review growth charts, feeding progress, and fluid balance.
- Adjust the nutritional plan as needed.
- Blood sugar monitoring TBG>2.6mmol
- Electrolytes within normal limit
- Increasing suck feeds with decreasing tube feeds
- Continuously monitor and document
- Insensible water loses- (evaporation etc).
- Normotensive
Complications Hypoglycaemia may cause:
exacerbate respiratory distress and cold stress due to limited glucose stores
neurological damage if left untreated
If the infant is Hypoxia forces the infant to rely more on anaerobic metabolism, rapidly depleting glucose stores
Managing nutrition & glucose homeostasis in some more commonly seen SCN presentations
*** this is a guide only: Always refer to local policy and or guidelines to ensure you are practicing within hospital frameworks and your scope of practice***
Hypothermia
Cold stress causes an increases oxygen and glucose consumption as the infant tries to generate heat which can lead to hypoglycaemia & worsen any hypoxia
Hypoglycaemia
Target Blood Sugar Levels: Strive to keep blood glucose levels above 2.6 mmol/L to prevent hypoglycaemic complications (refer to local guidelines)
Confirm Low Blood Sugar: Any initial low blood sugar readings should be validated generally through a laboratory result or a reliable blood gas machine to ensure accuracy.
Frequent Monitoring: For infants with blood sugar levels below 2.6 mmol/L, recheck glucose levels hourly until they stabilise. Continuous monitoring will help in early identification and management of recurrent hypoglycaemia (refer to local guidelines)
Signs of Poor Perfusion: Be vigilant for clinical signs of poor perfusion, such as lethargy, hypotonia, or feeding difficulties, which may indicate severe hypoglycaemia or other complications
Fluid volumes & concentrations of dextrose need to be carefully titrated to maintain blood glucose within normal range.
Feeding Protocols:
- For well infants, avoid intravenous (IV) dextrose unless the blood sugar is critically low (below 1.5 mmol/L).
- For infants identified as at risk (e.g., premature, small for gestational age), initiate feeds as soon as possible or administer a 10% dextrose infusion early on.
- Limit the volume of feeds or IV fluids to no more than 90 mL/kg on the first day of life for premature or small-for-gestational-age infants. If blood sugar levels remain
Consultation for Persistent Issues: If higher concentrations of dextrose (greater than 10%) are required to maintain normothermia or if hypoglycaemia persists despite appropriate management, the infant should be reviewed by the endocrine team for further assessment and possible investigations into underlying causes.
Anticipatory Care: Identify infants at risk early (e.g., those with a history of maternal diabetes, intrauterine growth restriction, or those born prematurely) to implement proactive measures, including early feeding and monitoring protocols. If unstable, medical team may consider increasing a higher dextrose concentration or as per local policy.
Respiratory Distress
If the infant is hypoxic, they are forced to rely more on anaerobic metabolism, rapidly depleting glucose stores leading to hypoglycaemia
Hypoxia also reduces peripheral perfusion, impairing thermoregulation and predisposing the infant to cold stress –hypothermia
Nil by mouth versus oral feeding: already compromised infant (increased WOB) does not need to concentrate on digesting milk in addition to breathing with impaired respiratory status.
A full stomach will push up on the diaphragm, which can exacerbate work of breathing.
Medical team may order IVT 60mg/kg/day starting dose to provided adequate calories for an already compromised infant
Blood sugars-4-6 hourly depending on initial reading or as per local policy
Prematurity & SGA (<34 weeks <1800 grams)
Premature neonates often have underdeveloped sucking and swallowing reflexes, making it difficult for them to take suck feeds.
They also have higher energy needs (calorie requirements) to ensure and are at risk of dehydration and malnutrition if not managed carefully
Parenteral Nutrition (PN): Initially, may require IV nutrition to provide adequate caloric and fluid intake until they can tolerate enteral feedings. Commencing rate 60 mls/kg /day
Enteral Feeding: Once the infant can tolerate (haemodynamically stable), small amounts of expressed breast milk (or formula) can be introduced via a nasogastric or orogastric tube.
Breast Milk: Breastfeeding is encouraged as it provides essential nutrients, immunity, and growth factors. Expressed breast milk should be given if the infant cannot directly breastfeed.
Fortification of Milk: often require milk fortifiers to meet their increased nutritional demands, especially for growth and bone development.
Monitoring Growth and Intake: Regular weight checks and monitoring fluid balance are essential to ensure appropriate growth and avoid complications such as dehydration or overfeeding.
Hyperbilirubinemia
Adequate nutrition is essential for the treatment of neonatal jaundice, as maintaining hydration by either parental (if unable to tolerate milk feeds) or enteral feeding (via NGT, breast of bottle) can help promote gut motility and the elimination of bilirubin through urine and stool.
Monitor Hydration: Monitor the infant for signs of dehydration, such as dry mucous membranes or reduced urine output. Ensure that the infant is receiving adequate fluids to stay hydrated, fluids may be increased by medical team at the commencement of phototherapy to avoid complications of dehydration
Feeding intolerance
Feeding intolerance in neonates, especially in preterm or critically ill infants, is a common and challenging issue. It refers to the inability of a neonate to tolerate enteral feedings, leading to signs of distress such as vomiting, abdominal distension, or signs of discomfort. This condition is often seen in preterm infants or those with underlying medical conditions like necrotizing enterocolitis (NEC), gastroesophageal reflux (GOR), gastrointestinal immaturity, or infections.
Managing nutrition is critical for neonates with feeding intolerance. Careful assessment and adjustments to feeding protocols are necessary to prevent worsening of symptoms and support the infant’s growth and development.
Assess and Monitor Feeding Tolerance: Carefully monitor for signs of intolerance, such as abdominal distension, vomiting, lethargy, or changes in bowel movements. These signs may indicate an issue with the current feeding regimen or gastrointestinal function.
Gradual Introduction of Feedings: In cases of suspected feeding intolerance, gradually introduce enteral feeding, starting with small volumes (e.g., trophic feeds) to assess gastrointestinal tolerance. Slowly increase the volume and concentration as tolerated.
Consider the Type of Feeding:
If the infant is unable to tolerate breast milk or formula feeds, consider alternative feeding methods such as parenteral nutrition (PN), which can provide nutrients intravenously while allowing the gut to rest.
Use fortified breast milk or specialized preterm infant formula if additional calories or nutrients are needed for growth.
Management of Feeding Intolerance –
Initial Steps:
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- Conduct a focused physical exam.
- Insert a nasogastric or orogastric tube for decompression before other diagnostic or therapeutic actions.
- Establish Intravenous access for fluids, electrolytes, and nutrition.
Stabilisation and Diagnosis:
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- Stabilise the infant hemodynamically.
- Perform abdominal imaging to determine the need for surgical intervention.
Treatment:
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- Gastric decompression and nil by mouth (NBO).
- Parenteral nutrition, fluid, and electrolyte balance.
- Thermoregulation
- Positioning to enable visualisation
- Intravenous antibiotics
- Parental support.
Suspected Sepsis
Nil by mouth versus oral feeding: already compromised infant does not need to concentrate on digesting milk
IVT 60mg/kg/day starting dose to provided adequate calories for an already compromised infant.
Fluid & Electrolyte Balance: Strict FBC must be maintained, fluid intake and urine output must be measured.
Hypoglycaemia may occur due to increased metabolic demands or hyperglycaemia related to stress therefore regular BSL monitoring. BSL 4-6 hours
Neonatal Abstinence Syndrome (NAS)
Adequate nutrition is critical in managing NAS, as infants may have difficulty with feeding due to irritability, poor suck-swallow coordination, or vomiting.
Assess Feeding: Monitor the infant’s ability to feed, including the suck and swallow reflexes. Infants with NAS may have difficulty feeding, and some may require Nasogastric tube feeding if they are unable to feed effectively.
Monitor hydration status closely by assessing skin turgor, fontanelles, and urine output. Dehydration can exacerbate NAS symptoms.
References
Gardner, S., Carter, B., Enzman-Hines, M. and Niermeyer, S. (2021) Merenstein and Gardner’s Handbook of Neonatal Intensive Care. Ninth Edition. Elsevier.
Kain, V., and Mannix, T. (2023). Neonatal Care for Nurses and Midwives. Principles for Practice. Second Edition. Elsevier.
Safer Care Victoria (2018) Hypoglycaemia in neonates. Safer Care Victoria https://www.safercare.vic.gov.au/best-practice-improvement/clinical-guidance/neonatal/hypoglycaemia-in-neonates. (Accessed November 2024)
The Royal Children’s Hospital [RCH] (2023) Neonatal Hypoglycaemia. The Royal Children’s Hospital. https://www.rch.org.au/rchcpg/hospital_clinical_guideline_index/Neonatal_hypoglycaemia/ (Accessed November 2024)
Total parenteral nutrition