# A nurse is caring for a newborn whose birthing parent has diabetes mellitus. The newborn is 2 hours old and exhibits jitteriness, poor feeding, and a high-pitched cry. The blood glucose level is 35 mg/dL. What is the priority nursing intervention?

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> subject: Maternal Newborn Health

## 문제

A nurse is caring for a newborn whose birthing parent has diabetes mellitus. The newborn is 2 hours old and exhibits jitteriness, poor feeding, and a high-pitched cry. The blood glucose level is 35 mg/dL. What is the priority nursing intervention?

## 보기

1. Administer IV dextrose 10% at 2 mL/kg over 1 minute **✔ 정답**
2. Provide oral feeding with breast milk or formula immediately
3. Place the newborn under a radiant warmer to maintain temperature
4. Notify the healthcare provider and prepare for glucose monitoring

**정답: 1**

## 해설

For symptomatic neonatal hypoglycemia (glucose 35 mg/dL with jitteriness, poor feeding, high-pitched cry), immediate IV dextrose is the priority to prevent neurological damage. Oral feeding is for asymptomatic or mild cases.

## 심화 해설

Clinical Context and Pathophysiology

This newborn presents with classic signs of symptomatic neonatal hypoglycemia (jitteriness, poor feeding, high-pitched cry) at 2 hours of life, a peak risk window for infants of diabetic mothers. During pregnancy, maternal hyperglycemia leads to fetal hyperglycemia and compensatory fetal hyperinsulinemia. After birth, the constant maternal glucose supply is abruptly cut off, but the newborn's hyperinsulinemic state persists, driving glucose into cells and suppressing glycogenolysis and gluconeogenesis. This results in a rapid drop in blood glucose, typically within the first 1–3 hours. The measured blood glucose of 35 mg/dL is below the commonly accepted threshold of 40–45 mg/dL for intervention in symptomatic newborns, and the presence of neurological signs indicates neuroglycopenia requiring urgent correction [1].

Analysis of Options and Priority Intervention

The priority is to rapidly restore brain glucose supply while avoiding iatrogenic harm. The options are evaluated based on the severity of symptoms and the immediacy of glucose delivery.

- Option 1 (Correct): Administer IV dextrose 10% at 2 mL/kg over 1 minute. Symptomatic hypoglycemia with neurological signs constitutes a medical emergency. The standard of care is an intravenous mini-bolus of dextrose 10% (200 mg/kg, which is 2 mL/kg) given as a slow push over 1 minute, immediately followed by a continuous IV dextrose infusion to prevent rebound hypoglycemia caused by the ongoing hyperinsulinemic state. This directly addresses the neuroglycopenia with a predictable and rapid rise in plasma glucose [1,2].

- Option 2 (Provide oral feeding immediately): Oral feeding is appropriate for asymptomatic hypoglycemia or as a preventive strategy in at-risk newborns. However, a symptomatic, jittery infant with poor feeding is at high risk for aspiration and will not absorb enteral glucose quickly enough to reverse neurological symptoms. While 40% glucose gel (200 mg/kg) buccally is an evidence-based intermediate step for asymptomatic hypoglycemia to reduce IV dextrose use, it is not the definitive treatment for an already symptomatic infant with a very low glucose level [3,4].

- Option 3 (Place under a radiant warmer): Maintaining normothermia is essential because hypothermia increases metabolic demand and glucose consumption, worsening hypoglycemia. While this is an important supportive measure, it does not correct the critical, symptomatic low blood glucose. It is a secondary, not priority, intervention in this acute scenario.

- Option 4 (Notify the healthcare provider and prepare for glucose monitoring): Notification and ongoing monitoring are necessary components of care, but they are not immediate therapeutic actions. In a symptomatic hypoglycemic crisis, the nurse must initiate the standing emergency intervention (IV dextrose bolus) to prevent neuronal injury while simultaneously notifying the provider. Delaying glucose administration to call the provider would prolong the period of neuroglycopenia [1].

Clinical Reasoning and Evidence Synthesis

The systematic review of international guidelines highlights that while operational thresholds vary, there is consensus that symptomatic hypoglycemia requires immediate IV dextrose treatment [1]. Infants of diabetic mothers are a specifically identified high-risk group due to their transient hyperinsulinemic state, which predisposes them to severe and prolonged hypoglycemia [2,4]. The Canadian Paediatric Society guidelines explicitly frame the management around the presence or absence of symptoms, with IV dextrose being the cornerstone of treating symptomatic cases [4]. The use of glucose gel, while effective in reducing the need for IV therapy in asymptomatic at-risk infants, is studied as a supplement to feeding and is not positioned as a replacement for IV dextrose when neurological signs are already present [3]. The immediate administration of a dextrose 10% mini-bolus directly targets the underlying pathophysiology—a brain deprived of its primary metabolic fuel—and is the only option that can rapidly reverse the neuroglycopenic symptoms.References (research sources)

- [1]Neonatal Hypoglycemia: A Systematic Review of International and Local Clinical Guidelines with Clinical Implications.GuidelineRusu C, Matyas M, Kramer BW, Dorobanțu FR, Bodog A. (2026) · DOI: 10.3390/jcm15103921

- [3]Glucose Gel in Infants at Risk for Transitional Neonatal HypoglycemiaResearch articleRana Alissa, Christopher J. Dudek, Laura Travers, Carmen Smotherman, Mark L. Hudak, Kartikeya Makker (2018) · DOI: 10.1055/s-0038-1639338

- [4]Screening guidelines for newborns at risk for low blood glucoseGuidelineKhalid Aziz, Paul Dancey, Canadian Paediatric Society (2004) · DOI: 10.1093/pch/9.10.723

## 임상 시나리오

Symptomatic Neonatal Hypoglycemia: Emergency IV DextroseInfant of Diabetic Mother with Neuroglycopenia
For a symptomatic newborn (jitteriness, poor feeding, high-pitched cry) with blood glucose

## 핵심 개념

- **Neuroglycopenia** — A shortage of glucose in the brain causing neurological symptoms like jitteriness, lethargy, or seizures due to severe hypoglycemia.
- **Hyperinsulinemia** — Excessively high levels of insulin in the blood, common in infants of diabetic mothers, which drives glucose into cells and causes rapid postnatal hypoglycemia.
- **Dextrose 10% mini-bolus** — An intravenous dose of 2 mL/kg (200 mg/kg) of 10% dextrose solution given slowly over 1 minute to rapidly correct severe, symptomatic hypoglycemia.
- **Gluconeogenesis** — The metabolic pathway by which the liver produces glucose from non-carbohydrate sources, often suppressed by hyperinsulinemia.
- **Symptomatic hypoglycemia** — Low blood glucose accompanied by clinical signs such as jitteriness, poor feeding, high-pitched cry, or seizures, indicating a medical emergency.

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